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run.go
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run.go
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// Copyright 2019 The Operator-SDK Authors
//
// 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
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package helm
import (
"context"
"fmt"
"os"
"runtime"
"github.com/operator-framework/operator-sdk/pkg/helm/controller"
hoflags "github.com/operator-framework/operator-sdk/pkg/helm/flags"
"github.com/operator-framework/operator-sdk/pkg/helm/release"
"github.com/operator-framework/operator-sdk/pkg/helm/watches"
"github.com/operator-framework/operator-sdk/pkg/k8sutil"
kubemetrics "github.com/operator-framework/operator-sdk/pkg/kube-metrics"
"github.com/operator-framework/operator-sdk/pkg/leader"
"github.com/operator-framework/operator-sdk/pkg/metrics"
sdkVersion "github.com/operator-framework/operator-sdk/version"
v1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/runtime/schema"
"k8s.io/apimachinery/pkg/util/intstr"
"k8s.io/client-go/rest"
"sigs.k8s.io/controller-runtime/pkg/cache"
crclient "sigs.k8s.io/controller-runtime/pkg/client"
"sigs.k8s.io/controller-runtime/pkg/client/config"
logf "sigs.k8s.io/controller-runtime/pkg/log"
"sigs.k8s.io/controller-runtime/pkg/manager"
"sigs.k8s.io/controller-runtime/pkg/manager/signals"
)
var (
metricsHost = "0.0.0.0"
metricsPort int32 = 8383
operatorMetricsPort int32 = 8686
)
var log = logf.Log.WithName("cmd")
func printVersion() {
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("Version of operator-sdk: %v", sdkVersion.Version))
}
// Run runs the helm operator
func Run(flags *hoflags.HelmOperatorFlags) error {
printVersion()
namespace, found := os.LookupEnv(k8sutil.WatchNamespaceEnvVar)
log = log.WithValues("Namespace", namespace)
if found {
if namespace == metav1.NamespaceAll {
log.Info("Watching all namespaces.")
} else {
log.Info("Watching single namespace.")
}
} else {
log.Info(fmt.Sprintf("%v environment variable not set. Watching all namespaces.",
k8sutil.WatchNamespaceEnvVar))
namespace = metav1.NamespaceAll
}
cfg, err := config.GetConfig()
if err != nil {
log.Error(err, "Failed to get config.")
return err
}
mgr, err := manager.New(cfg, manager.Options{
Namespace: namespace,
MetricsBindAddress: fmt.Sprintf("%s:%d", metricsHost, metricsPort),
NewClient: func(cache cache.Cache, config *rest.Config, options crclient.Options) (crclient.Client, error) {
c, err := crclient.New(config, options)
if err != nil {
return nil, err
}
return &crclient.DelegatingClient{
Reader: cache,
Writer: c,
StatusClient: c,
}, nil
},
})
if err != nil {
log.Error(err, "Failed to create a new manager.")
return err
}
watches, err := watches.Load(flags.WatchesFile)
if err != nil {
log.Error(err, "Failed to create new manager factories.")
return err
}
var gvks []schema.GroupVersionKind
for _, w := range watches {
// Register the controller with the factory.
err := controller.Add(mgr, controller.WatchOptions{
Namespace: namespace,
GVK: w.GroupVersionKind,
ManagerFactory: release.NewManagerFactory(mgr, w.ChartDir),
ReconcilePeriod: flags.ReconcilePeriod,
WatchDependentResources: w.WatchDependentResources,
OverrideValues: w.OverrideValues,
})
if err != nil {
log.Error(err, "Failed to add manager factory to controller.")
return err
}
gvks = append(gvks, w.GroupVersionKind)
}
operatorName, err := k8sutil.GetOperatorName()
if err != nil {
log.Error(err, "Failed to get operator name")
return err
}
ctx := context.TODO()
// Become the leader before proceeding
err = leader.Become(ctx, operatorName+"-lock")
if err != nil {
log.Error(err, "Failed to become leader.")
return err
}
// Generates operator specific metrics based on the GVKs.
// It serves those metrics on "http://metricsHost:operatorMetricsPort".
err = kubemetrics.GenerateAndServeCRMetrics(cfg, []string{namespace}, gvks, metricsHost, operatorMetricsPort)
if err != nil {
log.Info("Could not generate and serve custom resource metrics", "error", err.Error())
}
servicePorts := []v1.ServicePort{
{Port: operatorMetricsPort, Name: metrics.CRPortName, Protocol: v1.ProtocolTCP, TargetPort: intstr.IntOrString{Type: intstr.Int, IntVal: operatorMetricsPort}},
{Port: metricsPort, Name: metrics.OperatorPortName, Protocol: v1.ProtocolTCP, TargetPort: intstr.IntOrString{Type: intstr.Int, IntVal: metricsPort}},
}
// Create Service object to expose the metrics port(s).
_, err = metrics.CreateMetricsService(ctx, cfg, servicePorts)
if err != nil {
log.Info(err.Error())
}
// Start the Cmd
if err = mgr.Start(signals.SetupSignalHandler()); err != nil {
log.Error(err, "Manager exited non-zero.")
os.Exit(1)
}
return nil
}