# kubectl get configmap

# kubectl create configmap dev-config --from-literal=app.mem=2048m

# kubectl get configmap

# kubectl get configmap dev-config -o yaml

# vim dev.properties

app.env:dev

app.mem=2048m

app.properties=dev.env.url

:wq!

we use configMap command(yml file) to store environment varibale and configuation file in k8.

# kubectl create configmap dev-config1 --from-file=dev.properties

# kubectl get configmap

# kubectl get configmap dev-config1 -o yaml

Use configmap for a pod

vim pod-configmap.yml

kind: Pod

apiVersion: v1

metadata:

name: pod-configmap

spec:

containers:

- image: nginx

name: c1

volumeMounts:

- name: config-volume

mountPath: /etc/config

volumes:

- name: config-volume

configMap:

name: dev-config1

restartPolicy: Never

:wq!

replicaset

---

---

apiVersion: apps/v1

kind: ReplicaSet

metadata:

name: myrsconfig

spec:

replicas: 3

selector:

matchLabels:

type: webserver

template:

metadata:

name: mypodconfig

labels:

type: webserver

spec:

containers:

- image: nginx

name: c1

volumeMounts:

- name: config-volume

mountPath: /etc/config

volumes:

- name: config-volume

configMap:

name: config1

# kubectl apply -f pod-configmap.yml

# kubectl exec -it pod-configmap bash

# cd /etc/config

you will find the dev.properties file and configurations

to edit the config map always use this command.

>> kubectl edit configmap config1 -o yaml