# Cloud Composer API . projects . locations . environments

## Instance Methods

Close httplib2 connections.

Create a new environment.

Delete an environment.

Get an existing environment.

List environments.

Retrieves the next page of results.

Update an environment.

### Method Details

`close()`

    Close httplib2 connections.

`create(parent, body=None, x__xgafv=None)`

    Create a new environment.

    Args:
      parent: string, The parent must be of the form "projects/{projectId}/locations/{locationId}". (required)
      body: object, The request body.
        The object takes the form of:

    { # An environment for running orchestration tasks.
      "config": { # Configuration information for an environment. # Configuration parameters for this environment.
        "airflowUri": "A String", # Output only. The URI of the Apache Airflow Web UI hosted within this environment (see [Airflow web interface](/composer/docs/how-to/accessing/airflow-web-interface)).
        "dagGcsPrefix": "A String", # Output only. The Cloud Storage prefix of the DAGs for this environment. Although Cloud Storage objects reside in a flat namespace, a hierarchical file tree can be simulated using "/"-delimited object name prefixes. DAG objects for this environment reside in a simulated directory with the given prefix.
        "databaseConfig": { # The configuration of Cloud SQL instance that is used by the Apache Airflow software. Supported for Cloud Composer environments in versions composer-1.*.*-airflow-*.*.*. # Optional. The configuration settings for Cloud SQL instance used internally by Apache Airflow software. This field is supported for Cloud Composer environments in versions composer-1.*.*-airflow-*.*.*.
          "machineType": "A String", # Optional. Cloud SQL machine type used by Airflow database. It has to be one of: db-n1-standard-2, db-n1-standard-4, db-n1-standard-8 or db-n1-standard-16. If not specified, db-n1-standard-2 will be used.
        },
        "encryptionConfig": { # The encryption options for the Cloud Composer environment and its dependencies.Supported for Cloud Composer environments in versions composer-1.*.*-airflow-*.*.*. # Optional. The encryption options for the Cloud Composer environment and its dependencies. Cannot be updated. This field is supported for Cloud Composer environments in versions composer-1.*.*-airflow-*.*.*.
          "kmsKeyName": "A String", # Optional. Customer-managed Encryption Key available through Google's Key Management Service. Cannot be updated. If not specified, Google-managed key will be used.
        },
        "gkeCluster": "A String", # Output only. The Kubernetes Engine cluster used to run this environment.
        "nodeConfig": { # The configuration information for the Kubernetes Engine nodes running the Apache Airflow software. # The configuration used for the Kubernetes Engine cluster.
          "diskSizeGb": 42, # Optional. The disk size in GB used for node VMs. Minimum size is 20GB. If unspecified, defaults to 100GB. Cannot be updated. This field is supported for Cloud Composer environments in versions composer-1.*.*-airflow-*.*.*.
          "ipAllocationPolicy": { # Configuration for controlling how IPs are allocated in the GKE cluster running the Apache Airflow software. # Optional. The configuration for controlling how IPs are allocated in the GKE cluster.
            "clusterIpv4CidrBlock": "A String", # Optional. The IP address range used to allocate IP addresses to pods in the GKE cluster. For Cloud Composer environments in versions composer-1.*.*-airflow-*.*.*, this field is applicable only when `use_ip_aliases` is true. Set to blank to have GKE choose a range with the default size. Set to /netmask (e.g. `/14`) to have GKE choose a range with a specific netmask. Set to a [CIDR](https://en.wikipedia.org/wiki/Classless_Inter-Domain_Routing) notation (e.g. `10.96.0.0/14`) from the RFC-1918 private networks (e.g. `10.0.0.0/8`, `172.16.0.0/12`, `192.168.0.0/16`) to pick a specific range to use.
            "clusterSecondaryRangeName": "A String", # Optional. The name of the GKE cluster's secondary range used to allocate IP addresses to pods. For Cloud Composer environments in versions composer-1.*.*-airflow-*.*.*, this field is applicable only when `use_ip_aliases` is true.
            "servicesIpv4CidrBlock": "A String", # Optional. The IP address range of the services IP addresses in this GKE cluster. For Cloud Composer environments in versions composer-1.*.*-airflow-*.*.*, this field is applicable only when `use_ip_aliases` is true. Set to blank to have GKE choose a range with the default size. Set to /netmask (e.g. `/14`) to have GKE choose a range with a specific netmask. Set to a [CIDR](https://en.wikipedia.org/wiki/Classless_Inter-Domain_Routing) notation (e.g. `10.96.0.0/14`) from the RFC-1918 private networks (e.g. `10.0.0.0/8`, `172.16.0.0/12`, `192.168.0.0/16`) to pick a specific range to use.
            "servicesSecondaryRangeName": "A String", # Optional. The name of the services' secondary range used to allocate IP addresses to the GKE cluster. For Cloud Composer environments in versions composer-1.*.*-airflow-*.*.*, this field is applicable only when `use_ip_aliases` is true.
            "useIpAliases": True or False, # Optional. Whether or not to enable Alias IPs in the GKE cluster. If `true`, a VPC-native cluster is created. This field is only supported for Cloud Composer environments in versions composer-1.*.*-airflow-*.*.*. Environments in newer versions always use VPC-native GKE clusters.
          },
          "location": "A String", # Optional. The Compute Engine [zone](/compute/docs/regions-zones) in which to deploy the VMs used to run the Apache Airflow software, specified as a [relative resource name](/apis/design/resource_names#relative_resource_name). For example: "projects/{projectId}/zones/{zoneId}". This `location` must belong to the enclosing environment's project and location. If both this field and `nodeConfig.machineType` are specified, `nodeConfig.machineType` must belong to this `location`; if both are unspecified, the service will pick a zone in the Compute Engine region corresponding to the Cloud Composer location, and propagate that choice to both fields. If only one field (`location` or `nodeConfig.machineType`) is specified, the location information from the specified field will be propagated to the unspecified field. This field is supported for Cloud Composer environments in versions composer-1.*.*-airflow-*.*.*.
          "machineType": "A String", # Optional. The Compute Engine [machine type](/compute/docs/machine-types) used for cluster instances, specified as a [relative resource name](/apis/design/resource_names#relative_resource_name). For example: "projects/{projectId}/zones/{zoneId}/machineTypes/{machineTypeId}". The `machineType` must belong to the enclosing environment's project and location. If both this field and `nodeConfig.location` are specified, this `machineType` must belong to the `nodeConfig.location`; if both are unspecified, the service will pick a zone in the Compute Engine region corresponding to the Cloud Composer location, and propagate that choice to both fields. If exactly one of this field and `nodeConfig.location` is specified, the location information from the specified field will be propagated to the unspecified field. The `machineTypeId` must not be a [shared-core machine type](/compute/docs/machine-types#sharedcore). If this field is unspecified, the `machineTypeId` defaults to "n1-standard-1". This field is supported for Cloud Composer environments in versions composer-1.*.*-airflow-*.*.*.
          "network": "A String", # Optional. The Compute Engine network to be used for machine communications, specified as a [relative resource name](/apis/design/resource_names#relative_resource_name). For example: "projects/{projectId}/global/networks/{networkId}". If unspecified, the "default" network ID in the environment's project is used. If a [Custom Subnet Network](/vpc/docs/vpc#vpc_networks_and_subnets) is provided, `nodeConfig.subnetwork` must also be provided. For [Shared VPC](/vpc/docs/shared-vpc) subnetwork requirements, see `nodeConfig.subnetwork`.
          "oauthScopes": [ # Optional. The set of Google API scopes to be made available on all node VMs. If `oauth_scopes` is empty, defaults to ["https://www.googleapis.com/auth/cloud-platform"]. Cannot be updated. This field is supported for Cloud Composer environments in versions composer-1.*.*-airflow-*.*.*.
            "A String",
          ],
          "serviceAccount": "A String", # Optional. The Google Cloud Platform Service Account to be used by the node VMs. If a service account is not specified, the "default" Compute Engine service account is used. Cannot be updated.
          "subnetwork": "A String", # Optional. The Compute Engine subnetwork to be used for machine communications, specified as a [relative resource name](/apis/design/resource_names#relative_resource_name). For example: "projects/{projectId}/regions/{regionId}/subnetworks/{subnetworkId}" If a subnetwork is provided, `nodeConfig.network` must also be provided, and the subnetwork must belong to the enclosing environment's project and location.
          "tags": [ # Optional. The list of instance tags applied to all node VMs. Tags are used to identify valid sources or targets for network firewalls. Each tag within the list must comply with [RFC1035](https://www.ietf.org/rfc/rfc1035.txt). Cannot be updated. This field is supported for Cloud Composer environments in versions composer-1.*.*-airflow-*.*.*.
            "A String",
          ],
        },
        "nodeCount": 42, # The number of nodes in the Kubernetes Engine cluster that will be used to run this environment. This field is supported for Cloud Composer environments in versions composer-1.*.*-airflow-*.*.*.
        "privateEnvironmentConfig": { # The configuration information for configuring a Private IP Cloud Composer environment. # The configuration used for the Private IP Cloud Composer environment.
          "cloudSqlIpv4CidrBlock": "A String", # Optional. The CIDR block from which IP range in tenant project will be reserved for Cloud SQL. Needs to be disjoint from `web_server_ipv4_cidr_block`.
          "enablePrivateEnvironment": True or False, # Optional. If `true`, a Private IP Cloud Composer environment is created. If this field is set to true, `IPAllocationPolicy.use_ip_aliases` must be set to true for Cloud Composer environments in versions composer-1.*.*-airflow-*.*.*.
          "privateClusterConfig": { # Configuration options for the private GKE cluster in a Cloud Composer environment. # Optional. Configuration for the private GKE cluster for a Private IP Cloud Composer environment.
            "enablePrivateEndpoint": True or False, # Optional. If `true`, access to the public endpoint of the GKE cluster is denied.
            "masterIpv4CidrBlock": "A String", # Optional. The CIDR block from which IPv4 range for GKE master will be reserved. If left blank, the default value of '172.16.0.0/23' is used.
            "masterIpv4ReservedRange": "A String", # Output only. The IP range in CIDR notation to use for the hosted master network. This range is used for assigning internal IP addresses to the GKE cluster master or set of masters and to the internal load balancer virtual IP. This range must not overlap with any other ranges in use within the cluster's network.
          },
          "webServerIpv4CidrBlock": "A String", # Optional. The CIDR block from which IP range for web server will be reserved. Needs to be disjoint from `private_cluster_config.master_ipv4_cidr_block` and `cloud_sql_ipv4_cidr_block`. This field is supported for Cloud Composer environments in versions composer-1.*.*-airflow-*.*.*.
          "webServerIpv4ReservedRange": "A String", # Output only. The IP range reserved for the tenant project's App Engine VMs. This field is supported for Cloud Composer environments in versions composer-1.*.*-airflow-*.*.*.
        },
        "softwareConfig": { # Specifies the selection and configuration of software inside the environment. # The configuration settings for software inside the environment.
          "airflowConfigOverrides": { # Optional. Apache Airflow configuration properties to override. Property keys contain the section and property names, separated by a hyphen, for example "core-dags_are_paused_at_creation". Section names must not contain hyphens ("-"), opening square brackets ("["), or closing square brackets ("]"). The property name must not be empty and must not contain an equals sign ("=") or semicolon (";"). Section and property names must not contain a period ("."). Apache Airflow configuration property names must be written in [snake_case](https://en.wikipedia.org/wiki/Snake_case). Property values can contain any character, and can be written in any lower/upper case format. Certain Apache Airflow configuration property values are [blocked](/composer/docs/concepts/airflow-configurations), and cannot be overridden.
            "a_key": "A String",
          },
          "envVariables": { # Optional. Additional environment variables to provide to the Apache Airflow scheduler, worker, and webserver processes. Environment variable names must match the regular expression `a-zA-Z_*`. They cannot specify Apache Airflow software configuration overrides (they cannot match the regular expression `AIRFLOW__[A-Z0-9_]+__[A-Z0-9_]+`), and they cannot match any of the following reserved names: * `AIRFLOW_HOME` * `C_FORCE_ROOT` * `CONTAINER_NAME` * `DAGS_FOLDER` * `GCP_PROJECT` * `GCS_BUCKET` * `GKE_CLUSTER_NAME` * `SQL_DATABASE` * `SQL_INSTANCE` * `SQL_PASSWORD` * `SQL_PROJECT` * `SQL_REGION` * `SQL_USER`
            "a_key": "A String",
          },
          "imageVersion": "A String", # The version of the software running in the environment. This encapsulates both the version of Cloud Composer functionality and the version of Apache Airflow. It must match the regular expression `composer-([0-9]+\.[0-9]+\.[0-9]+|latest)-airflow-[0-9]+\.[0-9]+(\.[0-9]+.*)?`. When used as input, the server also checks if the provided version is supported and denies the request for an unsupported version. The Cloud Composer portion of the version is a [semantic version](https://semver.org) or `latest`. When the patch version is omitted, the current Cloud Composer patch version is selected. When `latest` is provided instead of an explicit version number, the server replaces `latest` with the current Cloud Composer version and stores that version number in the same field. The portion of the image version that follows *airflow-* is an official Apache Airflow repository [release name](https://github.com/apache/incubator-airflow/releases). See also [Version List](/composer/docs/concepts/versioning/composer-versions).
          "pypiPackages": { # Optional. Custom Python Package Index (PyPI) packages to be installed in the environment. Keys refer to the lowercase package name such as "numpy" and values are the lowercase extras and version specifier such as "==1.12.0", "[devel,gcp_api]", or "[devel]>=1.8.2, <1.9.2". To specify a package without pinning it to a version specifier, use the empty string as the value.
            "a_key": "A String",
          },
          "pythonVersion": "A String", # Optional. The major version of Python used to run the Apache Airflow scheduler, worker, and webserver processes. Can be set to '2' or '3'. If not specified, the default is '3'. Cannot be updated. This field is only supported for Cloud Composer environments in versions composer-1.*.*-airflow-*.*.*. Environments in newer versions always use Python major version 3.
          "schedulerCount": 42, # Optional. The number of schedulers for Airflow. This field is supported for Cloud Composer environments in versions composer-1.*.*-airflow-2.*.*.
        },
        "webServerConfig": { # The configuration settings for the Airflow web server App Engine instance. Supported for Cloud Composer environments in versions composer-1.*.*-airflow-*.*.* # Optional. The configuration settings for the Airflow web server App Engine instance.
          "machineType": "A String", # Optional. Machine type on which Airflow web server is running. It has to be one of: composer-n1-webserver-2, composer-n1-webserver-4 or composer-n1-webserver-8. If not specified, composer-n1-webserver-2 will be used. Value custom is returned only in response, if Airflow web server parameters were manually changed to a non-standard values.
        },
        "webServerNetworkAccessControl": { # Network-level access control policy for the Airflow web server. Supported for Cloud Composer environments in versions composer-1.*.*-airflow-*.*.*. # Optional. The network-level access control policy for the Airflow web server. If unspecified, no network-level access restrictions will be applied. This field is supported for Cloud Composer environments in versions composer-1.*.*-airflow-*.*.*.
          "allowedIpRanges": [ # A collection of allowed IP ranges with descriptions.
            { # Allowed IP range with user-provided description.
              "description": "A String", # Optional. User-provided description. It must contain at most 300 characters.
              "value": "A String", # IP address or range, defined using CIDR notation, of requests that this rule applies to. Examples: `192.168.1.1` or `192.168.0.0/16` or `2001:db8::/32` or `2001:0db8:0000:0042:0000:8a2e:0370:7334`. IP range prefixes should be properly truncated. For example, `1.2.3.4/24` should be truncated to `1.2.3.0/24`. Similarly, for IPv6, `2001:db8::1/32` should be truncated to `2001:db8::/32`.
            },
          ],
        },
      },
      "createTime": "A String", # Output only. The time at which this environment was created.
      "labels": { # Optional. User-defined labels for this environment. The labels map can contain no more than 64 entries. Entries of the labels map are UTF8 strings that comply with the following restrictions: * Keys must conform to regexp: \p{Ll}\p{Lo}{0,62} * Values must conform to regexp: [\p{Ll}\p{Lo}\p{N}_-]{0,63} * Both keys and values are additionally constrained to be <= 128 bytes in size.
        "a_key": "A String",
      },
      "name": "A String", # The resource name of the environment, in the form: "projects/{projectId}/locations/{locationId}/environments/{environmentId}" EnvironmentId must start with a lowercase letter followed by up to 63 lowercase letters, numbers, or hyphens, and cannot end with a hyphen.
      "state": "A String", # The current state of the environment.
      "updateTime": "A String", # Output only. The time at which this environment was last modified.
      "uuid": "A String", # Output only. The UUID (Universally Unique IDentifier) associated with this environment. This value is generated when the environment is created.
    }

      x__xgafv: string, V1 error format.
        Allowed values
          1 - v1 error format
          2 - v2 error format

    Returns:
      An object of the form:

        { # This resource represents a long-running operation that is the result of a network API call.
      "done": True or False, # If the value is `false`, it means the operation is still in progress. If `true`, the operation is completed, and either `error` or `response` is available.
      "error": { # The `Status` type defines a logical error model that is suitable for different programming environments, including REST APIs and RPC APIs. It is used by [gRPC](https://github.com/grpc). Each `Status` message contains three pieces of data: error code, error message, and error details. You can find out more about this error model and how to work with it in the [API Design Guide](https://cloud.google.com/apis/design/errors). # The error result of the operation in case of failure or cancellation.
        "code": 42, # The status code, which should be an enum value of google.rpc.Code.
        "details": [ # A list of messages that carry the error details. There is a common set of message types for APIs to use.
          {
            "a_key": "", # Properties of the object. Contains field @type with type URL.
          },
        ],
        "message": "A String", # A developer-facing error message, which should be in English. Any user-facing error message should be localized and sent in the google.rpc.Status.details field, or localized by the client.
      },
      "metadata": { # Service-specific metadata associated with the operation. It typically contains progress information and common metadata such as create time. Some services might not provide such metadata. Any method that returns a long-running operation should document the metadata type, if any.
        "a_key": "", # Properties of the object. Contains field @type with type URL.
      },
      "name": "A String", # The server-assigned name, which is only unique within the same service that originally returns it. If you use the default HTTP mapping, the `name` should be a resource name ending with `operations/{unique_id}`.
      "response": { # The normal response of the operation in case of success. If the original method returns no data on success, such as `Delete`, the response is `google.protobuf.Empty`. If the original method is standard `Get`/`Create`/`Update`, the response should be the resource. For other methods, the response should have the type `XxxResponse`, where `Xxx` is the original method name. For example, if the original method name is `TakeSnapshot()`, the inferred response type is `TakeSnapshotResponse`.
        "a_key": "", # Properties of the object. Contains field @type with type URL.
      },
    }

`delete(name, x__xgafv=None)`

    Delete an environment.

    Args:
      name: string, The environment to delete, in the form: "projects/{projectId}/locations/{locationId}/environments/{environmentId}" (required)
      x__xgafv: string, V1 error format.
        Allowed values
          1 - v1 error format
          2 - v2 error format

    Returns:
      An object of the form:

        { # This resource represents a long-running operation that is the result of a network API call.
      "done": True or False, # If the value is `false`, it means the operation is still in progress. If `true`, the operation is completed, and either `error` or `response` is available.
      "error": { # The `Status` type defines a logical error model that is suitable for different programming environments, including REST APIs and RPC APIs. It is used by [gRPC](https://github.com/grpc). Each `Status` message contains three pieces of data: error code, error message, and error details. You can find out more about this error model and how to work with it in the [API Design Guide](https://cloud.google.com/apis/design/errors). # The error result of the operation in case of failure or cancellation.
        "code": 42, # The status code, which should be an enum value of google.rpc.Code.
        "details": [ # A list of messages that carry the error details. There is a common set of message types for APIs to use.
          {
            "a_key": "", # Properties of the object. Contains field @type with type URL.
          },
        ],
        "message": "A String", # A developer-facing error message, which should be in English. Any user-facing error message should be localized and sent in the google.rpc.Status.details field, or localized by the client.
      },
      "metadata": { # Service-specific metadata associated with the operation. It typically contains progress information and common metadata such as create time. Some services might not provide such metadata. Any method that returns a long-running operation should document the metadata type, if any.
        "a_key": "", # Properties of the object. Contains field @type with type URL.
      },
      "name": "A String", # The server-assigned name, which is only unique within the same service that originally returns it. If you use the default HTTP mapping, the `name` should be a resource name ending with `operations/{unique_id}`.
      "response": { # The normal response of the operation in case of success. If the original method returns no data on success, such as `Delete`, the response is `google.protobuf.Empty`. If the original method is standard `Get`/`Create`/`Update`, the response should be the resource. For other methods, the response should have the type `XxxResponse`, where `Xxx` is the original method name. For example, if the original method name is `TakeSnapshot()`, the inferred response type is `TakeSnapshotResponse`.
        "a_key": "", # Properties of the object. Contains field @type with type URL.
      },
    }

`get(name, x__xgafv=None)`

    Get an existing environment.

    Args:
      name: string, The resource name of the environment to get, in the form: "projects/{projectId}/locations/{locationId}/environments/{environmentId}" (required)
      x__xgafv: string, V1 error format.
        Allowed values
          1 - v1 error format
          2 - v2 error format

    Returns:
      An object of the form:

        { # An environment for running orchestration tasks.
      "config": { # Configuration information for an environment. # Configuration parameters for this environment.
        "airflowUri": "A String", # Output only. The URI of the Apache Airflow Web UI hosted within this environment (see [Airflow web interface](/composer/docs/how-to/accessing/airflow-web-interface)).
        "dagGcsPrefix": "A String", # Output only. The Cloud Storage prefix of the DAGs for this environment. Although Cloud Storage objects reside in a flat namespace, a hierarchical file tree can be simulated using "/"-delimited object name prefixes. DAG objects for this environment reside in a simulated directory with the given prefix.
        "databaseConfig": { # The configuration of Cloud SQL instance that is used by the Apache Airflow software. Supported for Cloud Composer environments in versions composer-1.*.*-airflow-*.*.*. # Optional. The configuration settings for Cloud SQL instance used internally by Apache Airflow software. This field is supported for Cloud Composer environments in versions composer-1.*.*-airflow-*.*.*.
          "machineType": "A String", # Optional. Cloud SQL machine type used by Airflow database. It has to be one of: db-n1-standard-2, db-n1-standard-4, db-n1-standard-8 or db-n1-standard-16. If not specified, db-n1-standard-2 will be used.
        },
        "encryptionConfig": { # The encryption options for the Cloud Composer environment and its dependencies.Supported for Cloud Composer environments in versions composer-1.*.*-airflow-*.*.*. # Optional. The encryption options for the Cloud Composer environment and its dependencies. Cannot be updated. This field is supported for Cloud Composer environments in versions composer-1.*.*-airflow-*.*.*.
          "kmsKeyName": "A String", # Optional. Customer-managed Encryption Key available through Google's Key Management Service. Cannot be updated. If not specified, Google-managed key will be used.
        },
        "gkeCluster": "A String", # Output only. The Kubernetes Engine cluster used to run this environment.
        "nodeConfig": { # The configuration information for the Kubernetes Engine nodes running the Apache Airflow software. # The configuration used for the Kubernetes Engine cluster.
          "diskSizeGb": 42, # Optional. The disk size in GB used for node VMs. Minimum size is 20GB. If unspecified, defaults to 100GB. Cannot be updated. This field is supported for Cloud Composer environments in versions composer-1.*.*-airflow-*.*.*.
          "ipAllocationPolicy": { # Configuration for controlling how IPs are allocated in the GKE cluster running the Apache Airflow software. # Optional. The configuration for controlling how IPs are allocated in the GKE cluster.
            "clusterIpv4CidrBlock": "A String", # Optional. The IP address range used to allocate IP addresses to pods in the GKE cluster. For Cloud Composer environments in versions composer-1.*.*-airflow-*.*.*, this field is applicable only when `use_ip_aliases` is true. Set to blank to have GKE choose a range with the default size. Set to /netmask (e.g. `/14`) to have GKE choose a range with a specific netmask. Set to a [CIDR](https://en.wikipedia.org/wiki/Classless_Inter-Domain_Routing) notation (e.g. `10.96.0.0/14`) from the RFC-1918 private networks (e.g. `10.0.0.0/8`, `172.16.0.0/12`, `192.168.0.0/16`) to pick a specific range to use.
            "clusterSecondaryRangeName": "A String", # Optional. The name of the GKE cluster's secondary range used to allocate IP addresses to pods. For Cloud Composer environments in versions composer-1.*.*-airflow-*.*.*, this field is applicable only when `use_ip_aliases` is true.
            "servicesIpv4CidrBlock": "A String", # Optional. The IP address range of the services IP addresses in this GKE cluster. For Cloud Composer environments in versions composer-1.*.*-airflow-*.*.*, this field is applicable only when `use_ip_aliases` is true. Set to blank to have GKE choose a range with the default size. Set to /netmask (e.g. `/14`) to have GKE choose a range with a specific netmask. Set to a [CIDR](https://en.wikipedia.org/wiki/Classless_Inter-Domain_Routing) notation (e.g. `10.96.0.0/14`) from the RFC-1918 private networks (e.g. `10.0.0.0/8`, `172.16.0.0/12`, `192.168.0.0/16`) to pick a specific range to use.
            "servicesSecondaryRangeName": "A String", # Optional. The name of the services' secondary range used to allocate IP addresses to the GKE cluster. For Cloud Composer environments in versions composer-1.*.*-airflow-*.*.*, this field is applicable only when `use_ip_aliases` is true.
            "useIpAliases": True or False, # Optional. Whether or not to enable Alias IPs in the GKE cluster. If `true`, a VPC-native cluster is created. This field is only supported for Cloud Composer environments in versions composer-1.*.*-airflow-*.*.*. Environments in newer versions always use VPC-native GKE clusters.
          },
          "location": "A String", # Optional. The Compute Engine [zone](/compute/docs/regions-zones) in which to deploy the VMs used to run the Apache Airflow software, specified as a [relative resource name](/apis/design/resource_names#relative_resource_name). For example: "projects/{projectId}/zones/{zoneId}". This `location` must belong to the enclosing environment's project and location. If both this field and `nodeConfig.machineType` are specified, `nodeConfig.machineType` must belong to this `location`; if both are unspecified, the service will pick a zone in the Compute Engine region corresponding to the Cloud Composer location, and propagate that choice to both fields. If only one field (`location` or `nodeConfig.machineType`) is specified, the location information from the specified field will be propagated to the unspecified field. This field is supported for Cloud Composer environments in versions composer-1.*.*-airflow-*.*.*.
          "machineType": "A String", # Optional. The Compute Engine [machine type](/compute/docs/machine-types) used for cluster instances, specified as a [relative resource name](/apis/design/resource_names#relative_resource_name). For example: "projects/{projectId}/zones/{zoneId}/machineTypes/{machineTypeId}". The `machineType` must belong to the enclosing environment's project and location. If both this field and `nodeConfig.location` are specified, this `machineType` must belong to the `nodeConfig.location`; if both are unspecified, the service will pick a zone in the Compute Engine region corresponding to the Cloud Composer location, and propagate that choice to both fields. If exactly one of this field and `nodeConfig.location` is specified, the location information from the specified field will be propagated to the unspecified field. The `machineTypeId` must not be a [shared-core machine type](/compute/docs/machine-types#sharedcore). If this field is unspecified, the `machineTypeId` defaults to "n1-standard-1". This field is supported for Cloud Composer environments in versions composer-1.*.*-airflow-*.*.*.
          "network": "A String", # Optional. The Compute Engine network to be used for machine communications, specified as a [relative resource name](/apis/design/resource_names#relative_resource_name). For example: "projects/{projectId}/global/networks/{networkId}". If unspecified, the "default" network ID in the environment's project is used. If a [Custom Subnet Network](/vpc/docs/vpc#vpc_networks_and_subnets) is provided, `nodeConfig.subnetwork` must also be provided. For [Shared VPC](/vpc/docs/shared-vpc) subnetwork requirements, see `nodeConfig.subnetwork`.
          "oauthScopes": [ # Optional. The set of Google API scopes to be made available on all node VMs. If `oauth_scopes` is empty, defaults to ["https://www.googleapis.com/auth/cloud-platform"]. Cannot be updated. This field is supported for Cloud Composer environments in versions composer-1.*.*-airflow-*.*.*.
            "A String",
          ],
          "serviceAccount": "A String", # Optional. The Google Cloud Platform Service Account to be used by the node VMs. If a service account is not specified, the "default" Compute Engine service account is used. Cannot be updated.
          "subnetwork": "A String", # Optional. The Compute Engine subnetwork to be used for machine communications, specified as a [relative resource name](/apis/design/resource_names#relative_resource_name). For example: "projects/{projectId}/regions/{regionId}/subnetworks/{subnetworkId}" If a subnetwork is provided, `nodeConfig.network` must also be provided, and the subnetwork must belong to the enclosing environment's project and location.
          "tags": [ # Optional. The list of instance tags applied to all node VMs. Tags are used to identify valid sources or targets for network firewalls. Each tag within the list must comply with [RFC1035](https://www.ietf.org/rfc/rfc1035.txt). Cannot be updated. This field is supported for Cloud Composer environments in versions composer-1.*.*-airflow-*.*.*.
            "A String",
          ],
        },
        "nodeCount": 42, # The number of nodes in the Kubernetes Engine cluster that will be used to run this environment. This field is supported for Cloud Composer environments in versions composer-1.*.*-airflow-*.*.*.
        "privateEnvironmentConfig": { # The configuration information for configuring a Private IP Cloud Composer environment. # The configuration used for the Private IP Cloud Composer environment.
          "cloudSqlIpv4CidrBlock": "A String", # Optional. The CIDR block from which IP range in tenant project will be reserved for Cloud SQL. Needs to be disjoint from `web_server_ipv4_cidr_block`.
          "enablePrivateEnvironment": True or False, # Optional. If `true`, a Private IP Cloud Composer environment is created. If this field is set to true, `IPAllocationPolicy.use_ip_aliases` must be set to true for Cloud Composer environments in versions composer-1.*.*-airflow-*.*.*.
          "privateClusterConfig": { # Configuration options for the private GKE cluster in a Cloud Composer environment. # Optional. Configuration for the private GKE cluster for a Private IP Cloud Composer environment.
            "enablePrivateEndpoint": True or False, # Optional. If `true`, access to the public endpoint of the GKE cluster is denied.
            "masterIpv4CidrBlock": "A String", # Optional. The CIDR block from which IPv4 range for GKE master will be reserved. If left blank, the default value of '172.16.0.0/23' is used.
            "masterIpv4ReservedRange": "A String", # Output only. The IP range in CIDR notation to use for the hosted master network. This range is used for assigning internal IP addresses to the GKE cluster master or set of masters and to the internal load balancer virtual IP. This range must not overlap with any other ranges in use within the cluster's network.
          },
          "webServerIpv4CidrBlock": "A String", # Optional. The CIDR block from which IP range for web server will be reserved. Needs to be disjoint from `private_cluster_config.master_ipv4_cidr_block` and `cloud_sql_ipv4_cidr_block`. This field is supported for Cloud Composer environments in versions composer-1.*.*-airflow-*.*.*.
          "webServerIpv4ReservedRange": "A String", # Output only. The IP range reserved for the tenant project's App Engine VMs. This field is supported for Cloud Composer environments in versions composer-1.*.*-airflow-*.*.*.
        },
        "softwareConfig": { # Specifies the selection and configuration of software inside the environment. # The configuration settings for software inside the environment.
          "airflowConfigOverrides": { # Optional. Apache Airflow configuration properties to override. Property keys contain the section and property names, separated by a hyphen, for example "core-dags_are_paused_at_creation". Section names must not contain hyphens ("-"), opening square brackets ("["), or closing square brackets ("]"). The property name must not be empty and must not contain an equals sign ("=") or semicolon (";"). Section and property names must not contain a period ("."). Apache Airflow configuration property names must be written in [snake_case](https://en.wikipedia.org/wiki/Snake_case). Property values can contain any character, and can be written in any lower/upper case format. Certain Apache Airflow configuration property values are [blocked](/composer/docs/concepts/airflow-configurations), and cannot be overridden.
            "a_key": "A String",
          },
          "envVariables": { # Optional. Additional environment variables to provide to the Apache Airflow scheduler, worker, and webserver processes. Environment variable names must match the regular expression `a-zA-Z_*`. They cannot specify Apache Airflow software configuration overrides (they cannot match the regular expression `AIRFLOW__[A-Z0-9_]+__[A-Z0-9_]+`), and they cannot match any of the following reserved names: * `AIRFLOW_HOME` * `C_FORCE_ROOT` * `CONTAINER_NAME` * `DAGS_FOLDER` * `GCP_PROJECT` * `GCS_BUCKET` * `GKE_CLUSTER_NAME` * `SQL_DATABASE` * `SQL_INSTANCE` * `SQL_PASSWORD` * `SQL_PROJECT` * `SQL_REGION` * `SQL_USER`
            "a_key": "A String",
          },
          "imageVersion": "A String", # The version of the software running in the environment. This encapsulates both the version of Cloud Composer functionality and the version of Apache Airflow. It must match the regular expression `composer-([0-9]+\.[0-9]+\.[0-9]+|latest)-airflow-[0-9]+\.[0-9]+(\.[0-9]+.*)?`. When used as input, the server also checks if the provided version is supported and denies the request for an unsupported version. The Cloud Composer portion of the version is a [semantic version](https://semver.org) or `latest`. When the patch version is omitted, the current Cloud Composer patch version is selected. When `latest` is provided instead of an explicit version number, the server replaces `latest` with the current Cloud Composer version and stores that version number in the same field. The portion of the image version that follows *airflow-* is an official Apache Airflow repository [release name](https://github.com/apache/incubator-airflow/releases). See also [Version List](/composer/docs/concepts/versioning/composer-versions).
          "pypiPackages": { # Optional. Custom Python Package Index (PyPI) packages to be installed in the environment. Keys refer to the lowercase package name such as "numpy" and values are the lowercase extras and version specifier such as "==1.12.0", "[devel,gcp_api]", or "[devel]>=1.8.2, <1.9.2". To specify a package without pinning it to a version specifier, use the empty string as the value.
            "a_key": "A String",
          },
          "pythonVersion": "A String", # Optional. The major version of Python used to run the Apache Airflow scheduler, worker, and webserver processes. Can be set to '2' or '3'. If not specified, the default is '3'. Cannot be updated. This field is only supported for Cloud Composer environments in versions composer-1.*.*-airflow-*.*.*. Environments in newer versions always use Python major version 3.
          "schedulerCount": 42, # Optional. The number of schedulers for Airflow. This field is supported for Cloud Composer environments in versions composer-1.*.*-airflow-2.*.*.
        },
        "webServerConfig": { # The configuration settings for the Airflow web server App Engine instance. Supported for Cloud Composer environments in versions composer-1.*.*-airflow-*.*.* # Optional. The configuration settings for the Airflow web server App Engine instance.
          "machineType": "A String", # Optional. Machine type on which Airflow web server is running. It has to be one of: composer-n1-webserver-2, composer-n1-webserver-4 or composer-n1-webserver-8. If not specified, composer-n1-webserver-2 will be used. Value custom is returned only in response, if Airflow web server parameters were manually changed to a non-standard values.
        },
        "webServerNetworkAccessControl": { # Network-level access control policy for the Airflow web server. Supported for Cloud Composer environments in versions composer-1.*.*-airflow-*.*.*. # Optional. The network-level access control policy for the Airflow web server. If unspecified, no network-level access restrictions will be applied. This field is supported for Cloud Composer environments in versions composer-1.*.*-airflow-*.*.*.
          "allowedIpRanges": [ # A collection of allowed IP ranges with descriptions.
            { # Allowed IP range with user-provided description.
              "description": "A String", # Optional. User-provided description. It must contain at most 300 characters.
              "value": "A String", # IP address or range, defined using CIDR notation, of requests that this rule applies to. Examples: `192.168.1.1` or `192.168.0.0/16` or `2001:db8::/32` or `2001:0db8:0000:0042:0000:8a2e:0370:7334`. IP range prefixes should be properly truncated. For example, `1.2.3.4/24` should be truncated to `1.2.3.0/24`. Similarly, for IPv6, `2001:db8::1/32` should be truncated to `2001:db8::/32`.
            },
          ],
        },
      },
      "createTime": "A String", # Output only. The time at which this environment was created.
      "labels": { # Optional. User-defined labels for this environment. The labels map can contain no more than 64 entries. Entries of the labels map are UTF8 strings that comply with the following restrictions: * Keys must conform to regexp: \p{Ll}\p{Lo}{0,62} * Values must conform to regexp: [\p{Ll}\p{Lo}\p{N}_-]{0,63} * Both keys and values are additionally constrained to be <= 128 bytes in size.
        "a_key": "A String",
      },
      "name": "A String", # The resource name of the environment, in the form: "projects/{projectId}/locations/{locationId}/environments/{environmentId}" EnvironmentId must start with a lowercase letter followed by up to 63 lowercase letters, numbers, or hyphens, and cannot end with a hyphen.
      "state": "A String", # The current state of the environment.
      "updateTime": "A String", # Output only. The time at which this environment was last modified.
      "uuid": "A String", # Output only. The UUID (Universally Unique IDentifier) associated with this environment. This value is generated when the environment is created.
    }

`list(parent, pageSize=None, pageToken=None, x__xgafv=None)`

    List environments.

    Args:
      parent: string, List environments in the given project and location, in the form: "projects/{projectId}/locations/{locationId}" (required)
      pageSize: integer, The maximum number of environments to return.
      pageToken: string, The next_page_token value returned from a previous List request, if any.
      x__xgafv: string, V1 error format.
        Allowed values
          1 - v1 error format
          2 - v2 error format

    Returns:
      An object of the form:

        { # The environments in a project and location.
      "environments": [ # The list of environments returned by a ListEnvironmentsRequest.
        { # An environment for running orchestration tasks.
          "config": { # Configuration information for an environment. # Configuration parameters for this environment.
            "airflowUri": "A String", # Output only. The URI of the Apache Airflow Web UI hosted within this environment (see [Airflow web interface](/composer/docs/how-to/accessing/airflow-web-interface)).
            "dagGcsPrefix": "A String", # Output only. The Cloud Storage prefix of the DAGs for this environment. Although Cloud Storage objects reside in a flat namespace, a hierarchical file tree can be simulated using "/"-delimited object name prefixes. DAG objects for this environment reside in a simulated directory with the given prefix.
            "databaseConfig": { # The configuration of Cloud SQL instance that is used by the Apache Airflow software. Supported for Cloud Composer environments in versions composer-1.*.*-airflow-*.*.*. # Optional. The configuration settings for Cloud SQL instance used internally by Apache Airflow software. This field is supported for Cloud Composer environments in versions composer-1.*.*-airflow-*.*.*.
              "machineType": "A String", # Optional. Cloud SQL machine type used by Airflow database. It has to be one of: db-n1-standard-2, db-n1-standard-4, db-n1-standard-8 or db-n1-standard-16. If not specified, db-n1-standard-2 will be used.
            },
            "encryptionConfig": { # The encryption options for the Cloud Composer environment and its dependencies.Supported for Cloud Composer environments in versions composer-1.*.*-airflow-*.*.*. # Optional. The encryption options for the Cloud Composer environment and its dependencies. Cannot be updated. This field is supported for Cloud Composer environments in versions composer-1.*.*-airflow-*.*.*.
              "kmsKeyName": "A String", # Optional. Customer-managed Encryption Key available through Google's Key Management Service. Cannot be updated. If not specified, Google-managed key will be used.
            },
            "gkeCluster": "A String", # Output only. The Kubernetes Engine cluster used to run this environment.
            "nodeConfig": { # The configuration information for the Kubernetes Engine nodes running the Apache Airflow software. # The configuration used for the Kubernetes Engine cluster.
              "diskSizeGb": 42, # Optional. The disk size in GB used for node VMs. Minimum size is 20GB. If unspecified, defaults to 100GB. Cannot be updated. This field is supported for Cloud Composer environments in versions composer-1.*.*-airflow-*.*.*.
              "ipAllocationPolicy": { # Configuration for controlling how IPs are allocated in the GKE cluster running the Apache Airflow software. # Optional. The configuration for controlling how IPs are allocated in the GKE cluster.
                "clusterIpv4CidrBlock": "A String", # Optional. The IP address range used to allocate IP addresses to pods in the GKE cluster. For Cloud Composer environments in versions composer-1.*.*-airflow-*.*.*, this field is applicable only when `use_ip_aliases` is true. Set to blank to have GKE choose a range with the default size. Set to /netmask (e.g. `/14`) to have GKE choose a range with a specific netmask. Set to a [CIDR](https://en.wikipedia.org/wiki/Classless_Inter-Domain_Routing) notation (e.g. `10.96.0.0/14`) from the RFC-1918 private networks (e.g. `10.0.0.0/8`, `172.16.0.0/12`, `192.168.0.0/16`) to pick a specific range to use.
                "clusterSecondaryRangeName": "A String", # Optional. The name of the GKE cluster's secondary range used to allocate IP addresses to pods. For Cloud Composer environments in versions composer-1.*.*-airflow-*.*.*, this field is applicable only when `use_ip_aliases` is true.
                "servicesIpv4CidrBlock": "A String", # Optional. The IP address range of the services IP addresses in this GKE cluster. For Cloud Composer environments in versions composer-1.*.*-airflow-*.*.*, this field is applicable only when `use_ip_aliases` is true. Set to blank to have GKE choose a range with the default size. Set to /netmask (e.g. `/14`) to have GKE choose a range with a specific netmask. Set to a [CIDR](https://en.wikipedia.org/wiki/Classless_Inter-Domain_Routing) notation (e.g. `10.96.0.0/14`) from the RFC-1918 private networks (e.g. `10.0.0.0/8`, `172.16.0.0/12`, `192.168.0.0/16`) to pick a specific range to use.
                "servicesSecondaryRangeName": "A String", # Optional. The name of the services' secondary range used to allocate IP addresses to the GKE cluster. For Cloud Composer environments in versions composer-1.*.*-airflow-*.*.*, this field is applicable only when `use_ip_aliases` is true.
                "useIpAliases": True or False, # Optional. Whether or not to enable Alias IPs in the GKE cluster. If `true`, a VPC-native cluster is created. This field is only supported for Cloud Composer environments in versions composer-1.*.*-airflow-*.*.*. Environments in newer versions always use VPC-native GKE clusters.
              },
              "location": "A String", # Optional. The Compute Engine [zone](/compute/docs/regions-zones) in which to deploy the VMs used to run the Apache Airflow software, specified as a [relative resource name](/apis/design/resource_names#relative_resource_name). For example: "projects/{projectId}/zones/{zoneId}". This `location` must belong to the enclosing environment's project and location. If both this field and `nodeConfig.machineType` are specified, `nodeConfig.machineType` must belong to this `location`; if both are unspecified, the service will pick a zone in the Compute Engine region corresponding to the Cloud Composer location, and propagate that choice to both fields. If only one field (`location` or `nodeConfig.machineType`) is specified, the location information from the specified field will be propagated to the unspecified field. This field is supported for Cloud Composer environments in versions composer-1.*.*-airflow-*.*.*.
              "machineType": "A String", # Optional. The Compute Engine [machine type](/compute/docs/machine-types) used for cluster instances, specified as a [relative resource name](/apis/design/resource_names#relative_resource_name). For example: "projects/{projectId}/zones/{zoneId}/machineTypes/{machineTypeId}". The `machineType` must belong to the enclosing environment's project and location. If both this field and `nodeConfig.location` are specified, this `machineType` must belong to the `nodeConfig.location`; if both are unspecified, the service will pick a zone in the Compute Engine region corresponding to the Cloud Composer location, and propagate that choice to both fields. If exactly one of this field and `nodeConfig.location` is specified, the location information from the specified field will be propagated to the unspecified field. The `machineTypeId` must not be a [shared-core machine type](/compute/docs/machine-types#sharedcore). If this field is unspecified, the `machineTypeId` defaults to "n1-standard-1". This field is supported for Cloud Composer environments in versions composer-1.*.*-airflow-*.*.*.
              "network": "A String", # Optional. The Compute Engine network to be used for machine communications, specified as a [relative resource name](/apis/design/resource_names#relative_resource_name). For example: "projects/{projectId}/global/networks/{networkId}". If unspecified, the "default" network ID in the environment's project is used. If a [Custom Subnet Network](/vpc/docs/vpc#vpc_networks_and_subnets) is provided, `nodeConfig.subnetwork` must also be provided. For [Shared VPC](/vpc/docs/shared-vpc) subnetwork requirements, see `nodeConfig.subnetwork`.
              "oauthScopes": [ # Optional. The set of Google API scopes to be made available on all node VMs. If `oauth_scopes` is empty, defaults to ["https://www.googleapis.com/auth/cloud-platform"]. Cannot be updated. This field is supported for Cloud Composer environments in versions composer-1.*.*-airflow-*.*.*.
                "A String",
              ],
              "serviceAccount": "A String", # Optional. The Google Cloud Platform Service Account to be used by the node VMs. If a service account is not specified, the "default" Compute Engine service account is used. Cannot be updated.
              "subnetwork": "A String", # Optional. The Compute Engine subnetwork to be used for machine communications, specified as a [relative resource name](/apis/design/resource_names#relative_resource_name). For example: "projects/{projectId}/regions/{regionId}/subnetworks/{subnetworkId}" If a subnetwork is provided, `nodeConfig.network` must also be provided, and the subnetwork must belong to the enclosing environment's project and location.
              "tags": [ # Optional. The list of instance tags applied to all node VMs. Tags are used to identify valid sources or targets for network firewalls. Each tag within the list must comply with [RFC1035](https://www.ietf.org/rfc/rfc1035.txt). Cannot be updated. This field is supported for Cloud Composer environments in versions composer-1.*.*-airflow-*.*.*.
                "A String",
              ],
            },
            "nodeCount": 42, # The number of nodes in the Kubernetes Engine cluster that will be used to run this environment. This field is supported for Cloud Composer environments in versions composer-1.*.*-airflow-*.*.*.
            "privateEnvironmentConfig": { # The configuration information for configuring a Private IP Cloud Composer environment. # The configuration used for the Private IP Cloud Composer environment.
              "cloudSqlIpv4CidrBlock": "A String", # Optional. The CIDR block from which IP range in tenant project will be reserved for Cloud SQL. Needs to be disjoint from `web_server_ipv4_cidr_block`.
              "enablePrivateEnvironment": True or False, # Optional. If `true`, a Private IP Cloud Composer environment is created. If this field is set to true, `IPAllocationPolicy.use_ip_aliases` must be set to true for Cloud Composer environments in versions composer-1.*.*-airflow-*.*.*.
              "privateClusterConfig": { # Configuration options for the private GKE cluster in a Cloud Composer environment. # Optional. Configuration for the private GKE cluster for a Private IP Cloud Composer environment.
                "enablePrivateEndpoint": True or False, # Optional. If `true`, access to the public endpoint of the GKE cluster is denied.
                "masterIpv4CidrBlock": "A String", # Optional. The CIDR block from which IPv4 range for GKE master will be reserved. If left blank, the default value of '172.16.0.0/23' is used.
                "masterIpv4ReservedRange": "A String", # Output only. The IP range in CIDR notation to use for the hosted master network. This range is used for assigning internal IP addresses to the GKE cluster master or set of masters and to the internal load balancer virtual IP. This range must not overlap with any other ranges in use within the cluster's network.
              },
              "webServerIpv4CidrBlock": "A String", # Optional. The CIDR block from which IP range for web server will be reserved. Needs to be disjoint from `private_cluster_config.master_ipv4_cidr_block` and `cloud_sql_ipv4_cidr_block`. This field is supported for Cloud Composer environments in versions composer-1.*.*-airflow-*.*.*.
              "webServerIpv4ReservedRange": "A String", # Output only. The IP range reserved for the tenant project's App Engine VMs. This field is supported for Cloud Composer environments in versions composer-1.*.*-airflow-*.*.*.
            },
            "softwareConfig": { # Specifies the selection and configuration of software inside the environment. # The configuration settings for software inside the environment.
              "airflowConfigOverrides": { # Optional. Apache Airflow configuration properties to override. Property keys contain the section and property names, separated by a hyphen, for example "core-dags_are_paused_at_creation". Section names must not contain hyphens ("-"), opening square brackets ("["), or closing square brackets ("]"). The property name must not be empty and must not contain an equals sign ("=") or semicolon (";"). Section and property names must not contain a period ("."). Apache Airflow configuration property names must be written in [snake_case](https://en.wikipedia.org/wiki/Snake_case). Property values can contain any character, and can be written in any lower/upper case format. Certain Apache Airflow configuration property values are [blocked](/composer/docs/concepts/airflow-configurations), and cannot be overridden.
                "a_key": "A String",
              },
              "envVariables": { # Optional. Additional environment variables to provide to the Apache Airflow scheduler, worker, and webserver processes. Environment variable names must match the regular expression `a-zA-Z_*`. They cannot specify Apache Airflow software configuration overrides (they cannot match the regular expression `AIRFLOW__[A-Z0-9_]+__[A-Z0-9_]+`), and they cannot match any of the following reserved names: * `AIRFLOW_HOME` * `C_FORCE_ROOT` * `CONTAINER_NAME` * `DAGS_FOLDER` * `GCP_PROJECT` * `GCS_BUCKET` * `GKE_CLUSTER_NAME` * `SQL_DATABASE` * `SQL_INSTANCE` * `SQL_PASSWORD` * `SQL_PROJECT` * `SQL_REGION` * `SQL_USER`
                "a_key": "A String",
              },
              "imageVersion": "A String", # The version of the software running in the environment. This encapsulates both the version of Cloud Composer functionality and the version of Apache Airflow. It must match the regular expression `composer-([0-9]+\.[0-9]+\.[0-9]+|latest)-airflow-[0-9]+\.[0-9]+(\.[0-9]+.*)?`. When used as input, the server also checks if the provided version is supported and denies the request for an unsupported version. The Cloud Composer portion of the version is a [semantic version](https://semver.org) or `latest`. When the patch version is omitted, the current Cloud Composer patch version is selected. When `latest` is provided instead of an explicit version number, the server replaces `latest` with the current Cloud Composer version and stores that version number in the same field. The portion of the image version that follows *airflow-* is an official Apache Airflow repository [release name](https://github.com/apache/incubator-airflow/releases). See also [Version List](/composer/docs/concepts/versioning/composer-versions).
              "pypiPackages": { # Optional. Custom Python Package Index (PyPI) packages to be installed in the environment. Keys refer to the lowercase package name such as "numpy" and values are the lowercase extras and version specifier such as "==1.12.0", "[devel,gcp_api]", or "[devel]>=1.8.2, <1.9.2". To specify a package without pinning it to a version specifier, use the empty string as the value.
                "a_key": "A String",
              },
              "pythonVersion": "A String", # Optional. The major version of Python used to run the Apache Airflow scheduler, worker, and webserver processes. Can be set to '2' or '3'. If not specified, the default is '3'. Cannot be updated. This field is only supported for Cloud Composer environments in versions composer-1.*.*-airflow-*.*.*. Environments in newer versions always use Python major version 3.
              "schedulerCount": 42, # Optional. The number of schedulers for Airflow. This field is supported for Cloud Composer environments in versions composer-1.*.*-airflow-2.*.*.
            },
            "webServerConfig": { # The configuration settings for the Airflow web server App Engine instance. Supported for Cloud Composer environments in versions composer-1.*.*-airflow-*.*.* # Optional. The configuration settings for the Airflow web server App Engine instance.
              "machineType": "A String", # Optional. Machine type on which Airflow web server is running. It has to be one of: composer-n1-webserver-2, composer-n1-webserver-4 or composer-n1-webserver-8. If not specified, composer-n1-webserver-2 will be used. Value custom is returned only in response, if Airflow web server parameters were manually changed to a non-standard values.
            },
            "webServerNetworkAccessControl": { # Network-level access control policy for the Airflow web server. Supported for Cloud Composer environments in versions composer-1.*.*-airflow-*.*.*. # Optional. The network-level access control policy for the Airflow web server. If unspecified, no network-level access restrictions will be applied. This field is supported for Cloud Composer environments in versions composer-1.*.*-airflow-*.*.*.
              "allowedIpRanges": [ # A collection of allowed IP ranges with descriptions.
                { # Allowed IP range with user-provided description.
                  "description": "A String", # Optional. User-provided description. It must contain at most 300 characters.
                  "value": "A String", # IP address or range, defined using CIDR notation, of requests that this rule applies to. Examples: `192.168.1.1` or `192.168.0.0/16` or `2001:db8::/32` or `2001:0db8:0000:0042:0000:8a2e:0370:7334`. IP range prefixes should be properly truncated. For example, `1.2.3.4/24` should be truncated to `1.2.3.0/24`. Similarly, for IPv6, `2001:db8::1/32` should be truncated to `2001:db8::/32`.
                },
              ],
            },
          },
          "createTime": "A String", # Output only. The time at which this environment was created.
          "labels": { # Optional. User-defined labels for this environment. The labels map can contain no more than 64 entries. Entries of the labels map are UTF8 strings that comply with the following restrictions: * Keys must conform to regexp: \p{Ll}\p{Lo}{0,62} * Values must conform to regexp: [\p{Ll}\p{Lo}\p{N}_-]{0,63} * Both keys and values are additionally constrained to be <= 128 bytes in size.
            "a_key": "A String",
          },
          "name": "A String", # The resource name of the environment, in the form: "projects/{projectId}/locations/{locationId}/environments/{environmentId}" EnvironmentId must start with a lowercase letter followed by up to 63 lowercase letters, numbers, or hyphens, and cannot end with a hyphen.
          "state": "A String", # The current state of the environment.
          "updateTime": "A String", # Output only. The time at which this environment was last modified.
          "uuid": "A String", # Output only. The UUID (Universally Unique IDentifier) associated with this environment. This value is generated when the environment is created.
        },
      ],
      "nextPageToken": "A String", # The page token used to query for the next page if one exists.
    }

`list_next(previous_request, previous_response)`

    Retrieves the next page of results.

    Args:
      previous_request: The request for the previous page. (required)
      previous_response: The response from the request for the previous page. (required)

    Returns:
      A request object that you can call 'execute()' on to request the next
      page. Returns None if there are no more items in the collection.

`patch(name, body=None, updateMask=None, x__xgafv=None)`

    Update an environment.

    Args:
      name: string, The relative resource name of the environment to update, in the form: "projects/{projectId}/locations/{locationId}/environments/{environmentId}" (required)
      body: object, The request body.
        The object takes the form of:

    { # An environment for running orchestration tasks.
      "config": { # Configuration information for an environment. # Configuration parameters for this environment.
        "airflowUri": "A String", # Output only. The URI of the Apache Airflow Web UI hosted within this environment (see [Airflow web interface](/composer/docs/how-to/accessing/airflow-web-interface)).
        "dagGcsPrefix": "A String", # Output only. The Cloud Storage prefix of the DAGs for this environment. Although Cloud Storage objects reside in a flat namespace, a hierarchical file tree can be simulated using "/"-delimited object name prefixes. DAG objects for this environment reside in a simulated directory with the given prefix.
        "databaseConfig": { # The configuration of Cloud SQL instance that is used by the Apache Airflow software. Supported for Cloud Composer environments in versions composer-1.*.*-airflow-*.*.*. # Optional. The configuration settings for Cloud SQL instance used internally by Apache Airflow software. This field is supported for Cloud Composer environments in versions composer-1.*.*-airflow-*.*.*.
          "machineType": "A String", # Optional. Cloud SQL machine type used by Airflow database. It has to be one of: db-n1-standard-2, db-n1-standard-4, db-n1-standard-8 or db-n1-standard-16. If not specified, db-n1-standard-2 will be used.
        },
        "encryptionConfig": { # The encryption options for the Cloud Composer environment and its dependencies.Supported for Cloud Composer environments in versions composer-1.*.*-airflow-*.*.*. # Optional. The encryption options for the Cloud Composer environment and its dependencies. Cannot be updated. This field is supported for Cloud Composer environments in versions composer-1.*.*-airflow-*.*.*.
          "kmsKeyName": "A String", # Optional. Customer-managed Encryption Key available through Google's Key Management Service. Cannot be updated. If not specified, Google-managed key will be used.
        },
        "gkeCluster": "A String", # Output only. The Kubernetes Engine cluster used to run this environment.
        "nodeConfig": { # The configuration information for the Kubernetes Engine nodes running the Apache Airflow software. # The configuration used for the Kubernetes Engine cluster.
          "diskSizeGb": 42, # Optional. The disk size in GB used for node VMs. Minimum size is 20GB. If unspecified, defaults to 100GB. Cannot be updated. This field is supported for Cloud Composer environments in versions composer-1.*.*-airflow-*.*.*.
          "ipAllocationPolicy": { # Configuration for controlling how IPs are allocated in the GKE cluster running the Apache Airflow software. # Optional. The configuration for controlling how IPs are allocated in the GKE cluster.
            "clusterIpv4CidrBlock": "A String", # Optional. The IP address range used to allocate IP addresses to pods in the GKE cluster. For Cloud Composer environments in versions composer-1.*.*-airflow-*.*.*, this field is applicable only when `use_ip_aliases` is true. Set to blank to have GKE choose a range with the default size. Set to /netmask (e.g. `/14`) to have GKE choose a range with a specific netmask. Set to a [CIDR](https://en.wikipedia.org/wiki/Classless_Inter-Domain_Routing) notation (e.g. `10.96.0.0/14`) from the RFC-1918 private networks (e.g. `10.0.0.0/8`, `172.16.0.0/12`, `192.168.0.0/16`) to pick a specific range to use.
            "clusterSecondaryRangeName": "A String", # Optional. The name of the GKE cluster's secondary range used to allocate IP addresses to pods. For Cloud Composer environments in versions composer-1.*.*-airflow-*.*.*, this field is applicable only when `use_ip_aliases` is true.
            "servicesIpv4CidrBlock": "A String", # Optional. The IP address range of the services IP addresses in this GKE cluster. For Cloud Composer environments in versions composer-1.*.*-airflow-*.*.*, this field is applicable only when `use_ip_aliases` is true. Set to blank to have GKE choose a range with the default size. Set to /netmask (e.g. `/14`) to have GKE choose a range with a specific netmask. Set to a [CIDR](https://en.wikipedia.org/wiki/Classless_Inter-Domain_Routing) notation (e.g. `10.96.0.0/14`) from the RFC-1918 private networks (e.g. `10.0.0.0/8`, `172.16.0.0/12`, `192.168.0.0/16`) to pick a specific range to use.
            "servicesSecondaryRangeName": "A String", # Optional. The name of the services' secondary range used to allocate IP addresses to the GKE cluster. For Cloud Composer environments in versions composer-1.*.*-airflow-*.*.*, this field is applicable only when `use_ip_aliases` is true.
            "useIpAliases": True or False, # Optional. Whether or not to enable Alias IPs in the GKE cluster. If `true`, a VPC-native cluster is created. This field is only supported for Cloud Composer environments in versions composer-1.*.*-airflow-*.*.*. Environments in newer versions always use VPC-native GKE clusters.
          },
          "location": "A String", # Optional. The Compute Engine [zone](/compute/docs/regions-zones) in which to deploy the VMs used to run the Apache Airflow software, specified as a [relative resource name](/apis/design/resource_names#relative_resource_name). For example: "projects/{projectId}/zones/{zoneId}". This `location` must belong to the enclosing environment's project and location. If both this field and `nodeConfig.machineType` are specified, `nodeConfig.machineType` must belong to this `location`; if both are unspecified, the service will pick a zone in the Compute Engine region corresponding to the Cloud Composer location, and propagate that choice to both fields. If only one field (`location` or `nodeConfig.machineType`) is specified, the location information from the specified field will be propagated to the unspecified field. This field is supported for Cloud Composer environments in versions composer-1.*.*-airflow-*.*.*.
          "machineType": "A String", # Optional. The Compute Engine [machine type](/compute/docs/machine-types) used for cluster instances, specified as a [relative resource name](/apis/design/resource_names#relative_resource_name). For example: "projects/{projectId}/zones/{zoneId}/machineTypes/{machineTypeId}". The `machineType` must belong to the enclosing environment's project and location. If both this field and `nodeConfig.location` are specified, this `machineType` must belong to the `nodeConfig.location`; if both are unspecified, the service will pick a zone in the Compute Engine region corresponding to the Cloud Composer location, and propagate that choice to both fields. If exactly one of this field and `nodeConfig.location` is specified, the location information from the specified field will be propagated to the unspecified field. The `machineTypeId` must not be a [shared-core machine type](/compute/docs/machine-types#sharedcore). If this field is unspecified, the `machineTypeId` defaults to "n1-standard-1". This field is supported for Cloud Composer environments in versions composer-1.*.*-airflow-*.*.*.
          "network": "A String", # Optional. The Compute Engine network to be used for machine communications, specified as a [relative resource name](/apis/design/resource_names#relative_resource_name). For example: "projects/{projectId}/global/networks/{networkId}". If unspecified, the "default" network ID in the environment's project is used. If a [Custom Subnet Network](/vpc/docs/vpc#vpc_networks_and_subnets) is provided, `nodeConfig.subnetwork` must also be provided. For [Shared VPC](/vpc/docs/shared-vpc) subnetwork requirements, see `nodeConfig.subnetwork`.
          "oauthScopes": [ # Optional. The set of Google API scopes to be made available on all node VMs. If `oauth_scopes` is empty, defaults to ["https://www.googleapis.com/auth/cloud-platform"]. Cannot be updated. This field is supported for Cloud Composer environments in versions composer-1.*.*-airflow-*.*.*.
            "A String",
          ],
          "serviceAccount": "A String", # Optional. The Google Cloud Platform Service Account to be used by the node VMs. If a service account is not specified, the "default" Compute Engine service account is used. Cannot be updated.
          "subnetwork": "A String", # Optional. The Compute Engine subnetwork to be used for machine communications, specified as a [relative resource name](/apis/design/resource_names#relative_resource_name). For example: "projects/{projectId}/regions/{regionId}/subnetworks/{subnetworkId}" If a subnetwork is provided, `nodeConfig.network` must also be provided, and the subnetwork must belong to the enclosing environment's project and location.
          "tags": [ # Optional. The list of instance tags applied to all node VMs. Tags are used to identify valid sources or targets for network firewalls. Each tag within the list must comply with [RFC1035](https://www.ietf.org/rfc/rfc1035.txt). Cannot be updated. This field is supported for Cloud Composer environments in versions composer-1.*.*-airflow-*.*.*.
            "A String",
          ],
        },
        "nodeCount": 42, # The number of nodes in the Kubernetes Engine cluster that will be used to run this environment. This field is supported for Cloud Composer environments in versions composer-1.*.*-airflow-*.*.*.
        "privateEnvironmentConfig": { # The configuration information for configuring a Private IP Cloud Composer environment. # The configuration used for the Private IP Cloud Composer environment.
          "cloudSqlIpv4CidrBlock": "A String", # Optional. The CIDR block from which IP range in tenant project will be reserved for Cloud SQL. Needs to be disjoint from `web_server_ipv4_cidr_block`.
          "enablePrivateEnvironment": True or False, # Optional. If `true`, a Private IP Cloud Composer environment is created. If this field is set to true, `IPAllocationPolicy.use_ip_aliases` must be set to true for Cloud Composer environments in versions composer-1.*.*-airflow-*.*.*.
          "privateClusterConfig": { # Configuration options for the private GKE cluster in a Cloud Composer environment. # Optional. Configuration for the private GKE cluster for a Private IP Cloud Composer environment.
            "enablePrivateEndpoint": True or False, # Optional. If `true`, access to the public endpoint of the GKE cluster is denied.
            "masterIpv4CidrBlock": "A String", # Optional. The CIDR block from which IPv4 range for GKE master will be reserved. If left blank, the default value of '172.16.0.0/23' is used.
            "masterIpv4ReservedRange": "A String", # Output only. The IP range in CIDR notation to use for the hosted master network. This range is used for assigning internal IP addresses to the GKE cluster master or set of masters and to the internal load balancer virtual IP. This range must not overlap with any other ranges in use within the cluster's network.
          },
          "webServerIpv4CidrBlock": "A String", # Optional. The CIDR block from which IP range for web server will be reserved. Needs to be disjoint from `private_cluster_config.master_ipv4_cidr_block` and `cloud_sql_ipv4_cidr_block`. This field is supported for Cloud Composer environments in versions composer-1.*.*-airflow-*.*.*.
          "webServerIpv4ReservedRange": "A String", # Output only. The IP range reserved for the tenant project's App Engine VMs. This field is supported for Cloud Composer environments in versions composer-1.*.*-airflow-*.*.*.
        },
        "softwareConfig": { # Specifies the selection and configuration of software inside the environment. # The configuration settings for software inside the environment.
          "airflowConfigOverrides": { # Optional. Apache Airflow configuration properties to override. Property keys contain the section and property names, separated by a hyphen, for example "core-dags_are_paused_at_creation". Section names must not contain hyphens ("-"), opening square brackets ("["), or closing square brackets ("]"). The property name must not be empty and must not contain an equals sign ("=") or semicolon (";"). Section and property names must not contain a period ("."). Apache Airflow configuration property names must be written in [snake_case](https://en.wikipedia.org/wiki/Snake_case). Property values can contain any character, and can be written in any lower/upper case format. Certain Apache Airflow configuration property values are [blocked](/composer/docs/concepts/airflow-configurations), and cannot be overridden.
            "a_key": "A String",
          },
          "envVariables": { # Optional. Additional environment variables to provide to the Apache Airflow scheduler, worker, and webserver processes. Environment variable names must match the regular expression `a-zA-Z_*`. They cannot specify Apache Airflow software configuration overrides (they cannot match the regular expression `AIRFLOW__[A-Z0-9_]+__[A-Z0-9_]+`), and they cannot match any of the following reserved names: * `AIRFLOW_HOME` * `C_FORCE_ROOT` * `CONTAINER_NAME` * `DAGS_FOLDER` * `GCP_PROJECT` * `GCS_BUCKET` * `GKE_CLUSTER_NAME` * `SQL_DATABASE` * `SQL_INSTANCE` * `SQL_PASSWORD` * `SQL_PROJECT` * `SQL_REGION` * `SQL_USER`
            "a_key": "A String",
          },
          "imageVersion": "A String", # The version of the software running in the environment. This encapsulates both the version of Cloud Composer functionality and the version of Apache Airflow. It must match the regular expression `composer-([0-9]+\.[0-9]+\.[0-9]+|latest)-airflow-[0-9]+\.[0-9]+(\.[0-9]+.*)?`. When used as input, the server also checks if the provided version is supported and denies the request for an unsupported version. The Cloud Composer portion of the version is a [semantic version](https://semver.org) or `latest`. When the patch version is omitted, the current Cloud Composer patch version is selected. When `latest` is provided instead of an explicit version number, the server replaces `latest` with the current Cloud Composer version and stores that version number in the same field. The portion of the image version that follows *airflow-* is an official Apache Airflow repository [release name](https://github.com/apache/incubator-airflow/releases). See also [Version List](/composer/docs/concepts/versioning/composer-versions).
          "pypiPackages": { # Optional. Custom Python Package Index (PyPI) packages to be installed in the environment. Keys refer to the lowercase package name such as "numpy" and values are the lowercase extras and version specifier such as "==1.12.0", "[devel,gcp_api]", or "[devel]>=1.8.2, <1.9.2". To specify a package without pinning it to a version specifier, use the empty string as the value.
            "a_key": "A String",
          },
          "pythonVersion": "A String", # Optional. The major version of Python used to run the Apache Airflow scheduler, worker, and webserver processes. Can be set to '2' or '3'. If not specified, the default is '3'. Cannot be updated. This field is only supported for Cloud Composer environments in versions composer-1.*.*-airflow-*.*.*. Environments in newer versions always use Python major version 3.
          "schedulerCount": 42, # Optional. The number of schedulers for Airflow. This field is supported for Cloud Composer environments in versions composer-1.*.*-airflow-2.*.*.
        },
        "webServerConfig": { # The configuration settings for the Airflow web server App Engine instance. Supported for Cloud Composer environments in versions composer-1.*.*-airflow-*.*.* # Optional. The configuration settings for the Airflow web server App Engine instance.
          "machineType": "A String", # Optional. Machine type on which Airflow web server is running. It has to be one of: composer-n1-webserver-2, composer-n1-webserver-4 or composer-n1-webserver-8. If not specified, composer-n1-webserver-2 will be used. Value custom is returned only in response, if Airflow web server parameters were manually changed to a non-standard values.
        },
        "webServerNetworkAccessControl": { # Network-level access control policy for the Airflow web server. Supported for Cloud Composer environments in versions composer-1.*.*-airflow-*.*.*. # Optional. The network-level access control policy for the Airflow web server. If unspecified, no network-level access restrictions will be applied. This field is supported for Cloud Composer environments in versions composer-1.*.*-airflow-*.*.*.
          "allowedIpRanges": [ # A collection of allowed IP ranges with descriptions.
            { # Allowed IP range with user-provided description.
              "description": "A String", # Optional. User-provided description. It must contain at most 300 characters.
              "value": "A String", # IP address or range, defined using CIDR notation, of requests that this rule applies to. Examples: `192.168.1.1` or `192.168.0.0/16` or `2001:db8::/32` or `2001:0db8:0000:0042:0000:8a2e:0370:7334`. IP range prefixes should be properly truncated. For example, `1.2.3.4/24` should be truncated to `1.2.3.0/24`. Similarly, for IPv6, `2001:db8::1/32` should be truncated to `2001:db8::/32`.
            },
          ],
        },
      },
      "createTime": "A String", # Output only. The time at which this environment was created.
      "labels": { # Optional. User-defined labels for this environment. The labels map can contain no more than 64 entries. Entries of the labels map are UTF8 strings that comply with the following restrictions: * Keys must conform to regexp: \p{Ll}\p{Lo}{0,62} * Values must conform to regexp: [\p{Ll}\p{Lo}\p{N}_-]{0,63} * Both keys and values are additionally constrained to be <= 128 bytes in size.
        "a_key": "A String",
      },
      "name": "A String", # The resource name of the environment, in the form: "projects/{projectId}/locations/{locationId}/environments/{environmentId}" EnvironmentId must start with a lowercase letter followed by up to 63 lowercase letters, numbers, or hyphens, and cannot end with a hyphen.
      "state": "A String", # The current state of the environment.
      "updateTime": "A String", # Output only. The time at which this environment was last modified.
      "uuid": "A String", # Output only. The UUID (Universally Unique IDentifier) associated with this environment. This value is generated when the environment is created.
    }

      updateMask: string, Required. A comma-separated list of paths, relative to `Environment`, of fields to update. For example, to set the version of scikit-learn to install in the environment to 0.19.0 and to remove an existing installation of numpy, the `updateMask` parameter would include the following two `paths` values: "config.softwareConfig.pypiPackages.scikit-learn" and "config.softwareConfig.pypiPackages.numpy". The included patch environment would specify the scikit-learn version as follows: { "config":{ "softwareConfig":{ "pypiPackages":{ "scikit-learn":"==0.19.0" } } } } Note that in the above example, any existing PyPI packages other than scikit-learn and numpy will be unaffected. Only one update type may be included in a single request's `updateMask`. For example, one cannot update both the PyPI packages and labels in the same request. However, it is possible to update multiple members of a map field simultaneously in the same request. For example, to set the labels "label1" and "label2" while clearing "label3" (assuming it already exists), one can provide the paths "labels.label1", "labels.label2", and "labels.label3" and populate the patch environment as follows: { "labels":{ "label1":"new-label1-value" "label2":"new-label2-value" } } Note that in the above example, any existing labels that are not included in the `updateMask` will be unaffected. It is also possible to replace an entire map field by providing the map field's path in the `updateMask`. The new value of the field will be that which is provided in the patch environment. For example, to delete all pre-existing user-specified PyPI packages and install botocore at version 1.7.14, the `updateMask` would contain the path "config.softwareConfig.pypiPackages", and the patch environment would be the following: { "config":{ "softwareConfig":{ "pypiPackages":{ "botocore":"==1.7.14" } } } } **Note:** Only the following fields can be updated: * `config.softwareConfig.pypiPackages` * Replace all custom custom PyPI packages. If a replacement package map is not included in `environment`, all custom PyPI packages are cleared. It is an error to provide both this mask and a mask specifying an individual package. * `config.softwareConfig.pypiPackages.`packagename * Update the custom PyPI package *packagename*, preserving other packages. To delete the package, include it in `updateMask`, and omit the mapping for it in `environment.config.softwareConfig.pypiPackages`. It is an error to provide both a mask of this form and the `config.softwareConfig.pypiPackages` mask. * `labels` * Replace all environment labels. If a replacement labels map is not included in `environment`, all labels are cleared. It is an error to provide both this mask and a mask specifying one or more individual labels. * `labels.`labelName * Set the label named *labelName*, while preserving other labels. To delete the label, include it in `updateMask` and omit its mapping in `environment.labels`. It is an error to provide both a mask of this form and the `labels` mask. * `config.nodeCount` * Horizontally scale the number of nodes in the environment. An integer greater than or equal to 3 must be provided in the `config.nodeCount` field. Supported for Cloud Composer environments in versions composer-1.*.*-airflow-*.*.*. * `config.webServerNetworkAccessControl` * Replace the environment's current `WebServerNetworkAccessControl`. * `config.databaseConfig` Supported for Cloud Composer environments in versions composer-1.*.*-airflow-*.*.*. * Replace the environment's current `DatabaseConfig`. * `config.webServerConfig.machineType` * Machine type on which Airflow web server is running. It has to be one of: composer-n1-webserver-2, composer-n1-webserver-4 or composer-n1-webserver-8. Supported for Cloud Composer environments in versions composer-1.*.*-airflow-*.*.*. * `config.softwareConfig.airflowConfigOverrides` * Replace all Apache Airflow config overrides. If a replacement config overrides map is not included in `environment`, all config overrides are cleared. It is an error to provide both this mask and a mask specifying one or more individual config overrides. * `config.softwareConfig.airflowConfigOverrides.`section-name * Override the Apache Airflow config property *name* in the section named *section*, preserving other properties. To delete the property override, include it in `updateMask` and omit its mapping in `environment.config.softwareConfig.airflowConfigOverrides`. It is an error to provide both a mask of this form and the `config.softwareConfig.airflowConfigOverrides` mask. * `config.softwareConfig.envVariables` * Replace all environment variables. If a replacement environment variable map is not included in `environment`, all custom environment variables are cleared. It is an error to provide both this mask and a mask specifying one or more individual environment variables. * `config.softwareConfig.schedulerCount` * Horizontally scale the number of schedulers in Airflow. A positive integer not greater than the number of nodes must be provided in the `config.softwareConfig.schedulerCount` field. Supported for Cloud Composer environments in versions composer-1.*.*-airflow-2.*.*. * `config.databaseConfig.machineType` * Cloud SQL machine type used by Airflow database. It has to be one of: db-n1-standard-2, db-n1-standard-4, db-n1-standard-8 or db-n1-standard-16. Supported for Cloud Composer environments in versions composer-1.*.*-airflow-*.*.*. * `config.webServerConfig.machineType` * Machine type on which Airflow web server is running. It has to be one of: composer-n1-webserver-2, composer-n1-webserver-4 or composer-n1-webserver-8. Supported for Cloud Composer environments in versions composer-1.*.*-airflow-*.*.*.
      x__xgafv: string, V1 error format.
        Allowed values
          1 - v1 error format
          2 - v2 error format

    Returns:
      An object of the form:

        { # This resource represents a long-running operation that is the result of a network API call.
      "done": True or False, # If the value is `false`, it means the operation is still in progress. If `true`, the operation is completed, and either `error` or `response` is available.
      "error": { # The `Status` type defines a logical error model that is suitable for different programming environments, including REST APIs and RPC APIs. It is used by [gRPC](https://github.com/grpc). Each `Status` message contains three pieces of data: error code, error message, and error details. You can find out more about this error model and how to work with it in the [API Design Guide](https://cloud.google.com/apis/design/errors). # The error result of the operation in case of failure or cancellation.
        "code": 42, # The status code, which should be an enum value of google.rpc.Code.
        "details": [ # A list of messages that carry the error details. There is a common set of message types for APIs to use.
          {
            "a_key": "", # Properties of the object. Contains field @type with type URL.
          },
        ],
        "message": "A String", # A developer-facing error message, which should be in English. Any user-facing error message should be localized and sent in the google.rpc.Status.details field, or localized by the client.
      },
      "metadata": { # Service-specific metadata associated with the operation. It typically contains progress information and common metadata such as create time. Some services might not provide such metadata. Any method that returns a long-running operation should document the metadata type, if any.
        "a_key": "", # Properties of the object. Contains field @type with type URL.
      },
      "name": "A String", # The server-assigned name, which is only unique within the same service that originally returns it. If you use the default HTTP mapping, the `name` should be a resource name ending with `operations/{unique_id}`.
      "response": { # The normal response of the operation in case of success. If the original method returns no data on success, such as `Delete`, the response is `google.protobuf.Empty`. If the original method is standard `Get`/`Create`/`Update`, the response should be the resource. For other methods, the response should have the type `XxxResponse`, where `Xxx` is the original method name. For example, if the original method name is `TakeSnapshot()`, the inferred response type is `TakeSnapshotResponse`.
        "a_key": "", # Properties of the object. Contains field @type with type URL.
      },
    }