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// Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0
package rapidcore
import (
"context"
"io"
"io/ioutil"
"net/http"
"os"
"os/signal"
"syscall"
"go.amzn.com/lambda/core/statejson"
"go.amzn.com/lambda/extensions"
"go.amzn.com/lambda/interop"
"go.amzn.com/lambda/logging"
"go.amzn.com/lambda/rapid"
"go.amzn.com/lambda/rapidcore/env"
"go.amzn.com/lambda/telemetry"
log "github.com/sirupsen/logrus"
)
const (
defaultSigtermResetTimeoutMs = int64(2000)
)
type Sandbox interface {
Init(i *interop.Init, invokeTimeoutMs int64)
Invoke(responseWriter http.ResponseWriter, invoke *interop.Invoke) error
InteropServer() InteropServer
}
type ReserveResponse struct {
Token interop.Token
InternalState *statejson.InternalStateDescription
}
type InteropServer interface {
FastInvoke(w http.ResponseWriter, i *interop.Invoke, direct bool) error
Reserve(id string, traceID, lambdaSegmentID string) (*ReserveResponse, error)
Reset(reason string, timeoutMs int64) (*statejson.ResetDescription, error)
AwaitRelease() (*statejson.InternalStateDescription, error)
Shutdown(shutdown *interop.Shutdown) *statejson.InternalStateDescription
InternalState() (*statejson.InternalStateDescription, error)
CurrentToken() *interop.Token
}
type SandboxBuilder struct {
sandbox *rapid.Sandbox
defaultInteropServer *Server
useCustomInteropServer bool
shutdownFuncs []context.CancelFunc
debugTailLogWriter io.Writer
platformLogWriter io.Writer
}
type logSink int
const (
RuntimeLogSink logSink = iota
ExtensionLogSink
)
func NewSandboxBuilder(bootstrap *Bootstrap) *SandboxBuilder {
defaultInteropServer := NewServer(context.Background())
signalCtx, cancelSignalCtx := context.WithCancel(context.Background())
logsEgressAPI := &telemetry.NoOpLogsEgressAPI{}
runtimeStdoutWriter, runtimeStderrWriter, _ := logsEgressAPI.GetRuntimeSockets()
b := &SandboxBuilder{
sandbox: &rapid.Sandbox{
Bootstrap: bootstrap,
PreLoadTimeNs: 0, // TODO
StandaloneMode: true,
RuntimeStdoutWriter: runtimeStdoutWriter,
RuntimeStderrWriter: runtimeStderrWriter,
LogsEgressAPI: logsEgressAPI,
EnableTelemetryAPI: false,
Environment: env.NewEnvironment(),
Tracer: telemetry.NewNoOpTracer(),
SignalCtx: signalCtx,
EventsAPI: &telemetry.NoOpEventsAPI{},
InitCachingEnabled: false,
},
defaultInteropServer: defaultInteropServer,
shutdownFuncs: []context.CancelFunc{},
debugTailLogWriter: ioutil.Discard,
platformLogWriter: ioutil.Discard,
}
b.AddShutdownFunc(context.CancelFunc(func() {
log.Info("Shutting down...")
defaultInteropServer.Reset("SandboxTerminated", defaultSigtermResetTimeoutMs)
cancelSignalCtx()
}))
return b
}
func (b *SandboxBuilder) SetInteropServer(interopServer interop.Server) *SandboxBuilder {
b.sandbox.InteropServer = interopServer
b.useCustomInteropServer = true
return b
}
func (b *SandboxBuilder) SetEventsAPI(eventsAPI telemetry.EventsAPI) *SandboxBuilder {
b.sandbox.EventsAPI = eventsAPI
return b
}
func (b *SandboxBuilder) SetTracer(tracer telemetry.Tracer) *SandboxBuilder {
b.sandbox.Tracer = tracer
return b
}
func (b *SandboxBuilder) DisableStandaloneMode() *SandboxBuilder {
b.sandbox.StandaloneMode = false
return b
}
func (b *SandboxBuilder) SetExtensionsFlag(extensionsEnabled bool) *SandboxBuilder {
if extensionsEnabled {
extensions.Enable()
} else {
extensions.Disable()
}
return b
}
func (b *SandboxBuilder) SetInitCachingFlag(initCachingEnabled bool) *SandboxBuilder {
b.sandbox.InitCachingEnabled = initCachingEnabled
return b
}
func (b *SandboxBuilder) SetPreLoadTimeNs(preLoadTimeNs int64) *SandboxBuilder {
b.sandbox.PreLoadTimeNs = preLoadTimeNs
return b
}
func (b *SandboxBuilder) SetEnvironmentVariables(environment *env.Environment) *SandboxBuilder {
b.sandbox.Environment = environment
return b
}
func (b *SandboxBuilder) SetPlatformLogOutput(w io.Writer) *SandboxBuilder {
b.platformLogWriter = w
return b
}
func (b *SandboxBuilder) SetTailLogOutput(w io.Writer) *SandboxBuilder {
b.debugTailLogWriter = w
return b
}
func (b *SandboxBuilder) SetLogsSubscriptionAPI(logsSubscriptionAPI telemetry.LogsSubscriptionAPI) *SandboxBuilder {
b.sandbox.EnableTelemetryAPI = true
b.sandbox.LogsSubscriptionAPI = logsSubscriptionAPI
return b
}
func (b *SandboxBuilder) SetLogsEgressAPI(logsEgressAPI telemetry.LogsEgressAPI) *SandboxBuilder {
runtimeStdoutWriter, runtimeStderrWriter, err := logsEgressAPI.GetRuntimeSockets()
if err != nil {
log.WithError(err).Fatal("failed to get the Runtime sockets from the logs egress API")
}
b.sandbox.LogsEgressAPI = logsEgressAPI
b.sandbox.RuntimeStdoutWriter = runtimeStdoutWriter
b.sandbox.RuntimeStderrWriter = runtimeStderrWriter
return b
}
func (b *SandboxBuilder) SetHandler(handler string) *SandboxBuilder {
b.sandbox.Handler = handler
return b
}
func (b *SandboxBuilder) AddShutdownFunc(shutdownFunc context.CancelFunc) *SandboxBuilder {
b.shutdownFuncs = append(b.shutdownFuncs, shutdownFunc)
return b
}
func (b *SandboxBuilder) setupLoggingWithDebugLogs() {
// Compose debug log writer with all log sinks. Debug log writer w
// will not write logs when disabled by invoke parameter
b.sandbox.DebugTailLogger = logging.NewTailLogWriter(b.debugTailLogWriter)
b.sandbox.PlatformLogger = logging.NewPlatformLogger(b.platformLogWriter, b.sandbox.DebugTailLogger)
b.sandbox.RuntimeStdoutWriter = io.MultiWriter(b.sandbox.DebugTailLogger, b.sandbox.RuntimeStdoutWriter)
b.sandbox.RuntimeStderrWriter = io.MultiWriter(b.sandbox.DebugTailLogger, b.sandbox.RuntimeStderrWriter)
}
func (b *SandboxBuilder) Create() {
if len(b.sandbox.Handler) > 0 {
b.sandbox.Environment.SetHandler(b.sandbox.Handler)
}
if !b.useCustomInteropServer {
b.sandbox.InteropServer = b.defaultInteropServer
}
b.setupLoggingWithDebugLogs()
go signalHandler(b.shutdownFuncs)
rapid.Start(b.sandbox)
}
func (b *SandboxBuilder) Init(i *interop.Init, timeoutMs int64) {
b.sandbox.InteropServer.Init(&interop.Start{
Handler: i.Handler,
CorrelationID: i.CorrelationID,
AwsKey: i.AwsKey,
AwsSecret: i.AwsSecret,
AwsSession: i.AwsSession,
XRayDaemonAddress: i.XRayDaemonAddress,
FunctionName: i.FunctionName,
FunctionVersion: i.FunctionVersion,
CustomerEnvironmentVariables: i.CustomerEnvironmentVariables,
}, timeoutMs)
}
func (b *SandboxBuilder) Invoke(w http.ResponseWriter, i *interop.Invoke) error {
return b.sandbox.InteropServer.Invoke(w, i)
}
func (b *SandboxBuilder) InteropServer() InteropServer {
return b.defaultInteropServer
}
// SetLogLevel sets the log level for internal logging. Needs to be called very
// early during startup to configure logs emitted during initialization
func SetLogLevel(logLevel string) {
level, err := log.ParseLevel(logLevel)
if err != nil {
log.WithError(err).Fatal("Failed to set log level. Valid log levels are:", log.AllLevels)
}
log.SetLevel(level)
log.SetFormatter(&logging.InternalFormatter{})
}
func SetInternalLogOutput(w io.Writer) {
logging.SetOutput(w)
}
// Trap SIGINT and SIGTERM signals and call shutdown function
func signalHandler(shutdownFuncs []context.CancelFunc) {
sig := make(chan os.Signal, 1)
signal.Notify(sig, syscall.SIGINT, syscall.SIGTERM)
sigReceived := <-sig
log.WithField("signal", sigReceived.String()).Info("Received signal")
for _, shutdownFunc := range shutdownFuncs {
shutdownFunc()
}
}