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main.go
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main.go
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/**
* Copyright (c) 2018 Dell Inc., or its subsidiaries. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*/
package main
import (
"context"
"flag"
"fmt"
"os"
"runtime"
"github.com/operator-framework/operator-sdk/pkg/k8sutil"
"github.com/operator-framework/operator-sdk/pkg/leader"
"github.com/operator-framework/operator-sdk/pkg/ready"
sdkVersion "github.com/operator-framework/operator-sdk/version"
"github.com/pravega/zookeeper-operator/pkg/apis"
"github.com/pravega/zookeeper-operator/pkg/controller"
"github.com/pravega/zookeeper-operator/pkg/version"
_ "k8s.io/client-go/plugin/pkg/client/auth/gcp"
_ "k8s.io/client-go/plugin/pkg/client/auth/oidc"
"sigs.k8s.io/controller-runtime/pkg/client/config"
"sigs.k8s.io/controller-runtime/pkg/manager"
logf "sigs.k8s.io/controller-runtime/pkg/runtime/log"
"sigs.k8s.io/controller-runtime/pkg/runtime/signals"
)
var (
log = logf.Log.WithName("cmd")
versionFlag bool
)
func init() {
flag.BoolVar(&versionFlag, "version", false, "Show version and quit")
}
func printVersion() {
log.Info(fmt.Sprintf("zookeeper-operator Version: %v", version.Version))
log.Info(fmt.Sprintf("Git SHA: %s", version.GitSHA))
log.Info(fmt.Sprintf("Go Version: %s", runtime.Version()))
log.Info(fmt.Sprintf("Go OS/Arch: %s/%s", runtime.GOOS, runtime.GOARCH))
log.Info(fmt.Sprintf("operator-sdk Version: %v", sdkVersion.Version))
}
func main() {
flag.Parse()
// The logger instantiated here can be changed to any logger
// implementing the logr.Logger interface. This logger will
// be propagated through the whole operator, generating
// uniform and structured logs.
logf.SetLogger(logf.ZapLogger(false))
printVersion()
if versionFlag {
os.Exit(0)
}
namespace, err := k8sutil.GetWatchNamespace()
if err != nil {
log.Error(err, "failed to get watch namespace")
os.Exit(1)
}
// Get a config to talk to the apiserver
cfg, err := config.GetConfig()
if err != nil {
log.Error(err, "")
os.Exit(1)
}
// Become the leader before proceeding
leader.Become(context.TODO(), "zookeeper-operator-lock")
r := ready.NewFileReady()
err = r.Set()
if err != nil {
log.Error(err, "")
os.Exit(1)
}
defer r.Unset()
// Create a new Cmd to provide shared dependencies and start components
mgr, err := manager.New(cfg, manager.Options{Namespace: namespace})
if err != nil {
log.Error(err, "")
os.Exit(1)
}
log.Info("Registering Components.")
// Setup Scheme for all resources
if err := apis.AddToScheme(mgr.GetScheme()); err != nil {
log.Error(err, "")
os.Exit(1)
}
// Setup all Controllers
if err := controller.AddToManager(mgr); err != nil {
log.Error(err, "")
os.Exit(1)
}
log.Info("Starting the Cmd.")
// Start the Cmd
if err := mgr.Start(signals.SetupSignalHandler()); err != nil {
log.Error(err, "manager exited non-zero")
os.Exit(1)
}
}