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Split snapshot controller using beta APIs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,6 @@ | ||
| FROM gcr.io/distroless/static:latest | ||
| LABEL maintainers="Kubernetes Authors" | ||
| LABEL description="CSI External Snapshotter Common" | ||
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| COPY ./bin/csi-snapshotter-common csi-snapshotter-common | ||
| ENTRYPOINT ["/csi-snapshotter-common"] |
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,161 @@ | ||
| /* | ||
| Copyright 2019 The Kubernetes 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 main | ||
|
|
||
| import ( | ||
| "context" | ||
| "flag" | ||
| "fmt" | ||
| "os" | ||
| "os/signal" | ||
| "strings" | ||
| "time" | ||
|
|
||
| "google.golang.org/grpc" | ||
|
|
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| "k8s.io/client-go/kubernetes" | ||
| "k8s.io/client-go/kubernetes/scheme" | ||
| "k8s.io/client-go/rest" | ||
| "k8s.io/client-go/tools/clientcmd" | ||
| "k8s.io/klog" | ||
|
|
||
| "github.com/container-storage-interface/spec/lib/go/csi" | ||
| "github.com/kubernetes-csi/csi-lib-utils/leaderelection" | ||
| csirpc "github.com/kubernetes-csi/csi-lib-utils/rpc" | ||
| controller "github.com/kubernetes-csi/external-snapshotter/pkg/common_controller" | ||
|
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| clientset "github.com/kubernetes-csi/external-snapshotter/pkg/client/clientset/versioned" | ||
| snapshotscheme "github.com/kubernetes-csi/external-snapshotter/pkg/client/clientset/versioned/scheme" | ||
| informers "github.com/kubernetes-csi/external-snapshotter/pkg/client/informers/externalversions" | ||
| coreinformers "k8s.io/client-go/informers" | ||
| ) | ||
|
|
||
| const ( | ||
| // Number of worker threads | ||
| threads = 10 | ||
| ) | ||
|
|
||
| // Command line flags | ||
| var ( | ||
| kubeconfig = flag.String("kubeconfig", "", "Absolute path to the kubeconfig file. Required only when running out of cluster.") | ||
| createSnapshotContentRetryCount = flag.Int("create-snapshotcontent-retrycount", 5, "Number of retries when we create a snapshot content object for a snapshot.") | ||
| createSnapshotContentInterval = flag.Duration("create-snapshotcontent-interval", 10*time.Second, "Interval between retries when we create a snapshot content object for a snapshot.") | ||
| resyncPeriod = flag.Duration("resync-period", 60*time.Second, "Resync interval of the controller.") | ||
| showVersion = flag.Bool("version", false, "Show version.") | ||
|
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| leaderElection = flag.Bool("leader-election", false, "Enables leader election.") | ||
| leaderElectionNamespace = flag.String("leader-election-namespace", "", "The namespace where the leader election resource exists. Defaults to the pod namespace if not set.") | ||
| ) | ||
|
|
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| var ( | ||
| version = "unknown" | ||
| prefix = "external-snapshotter-leader" | ||
| ) | ||
|
|
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| func main() { | ||
| klog.InitFlags(nil) | ||
| flag.Set("logtostderr", "true") | ||
| flag.Parse() | ||
|
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| if *showVersion { | ||
| fmt.Println(os.Args[0], version) | ||
| os.Exit(0) | ||
| } | ||
| klog.Infof("Version: %s", version) | ||
|
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| // Create the client config. Use kubeconfig if given, otherwise assume in-cluster. | ||
| config, err := buildConfig(*kubeconfig) | ||
| if err != nil { | ||
| klog.Error(err.Error()) | ||
| os.Exit(1) | ||
| } | ||
|
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| kubeClient, err := kubernetes.NewForConfig(config) | ||
| if err != nil { | ||
| klog.Error(err.Error()) | ||
| os.Exit(1) | ||
| } | ||
|
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| snapClient, err := clientset.NewForConfig(config) | ||
| if err != nil { | ||
| klog.Errorf("Error building snapshot clientset: %s", err.Error()) | ||
| os.Exit(1) | ||
| } | ||
|
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| factory := informers.NewSharedInformerFactory(snapClient, *resyncPeriod) | ||
| coreFactory := coreinformers.NewSharedInformerFactory(kubeClient, *resyncPeriod) | ||
|
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| // Add Snapshot types to the defualt Kubernetes so events can be logged for them | ||
| snapshotscheme.AddToScheme(scheme.Scheme) | ||
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| klog.V(2).Infof("Start NewCSISnapshotController with kubeconfig [%s] createSnapshotContentRetryCount [%d] createSnapshotContentInterval [%d] resyncPeriod [%+v]", *kubeconfig, *createSnapshotContentRetryCount, *createSnapshotContentInterval, *resyncPeriod) | ||
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| ctrl := controller.NewCSISnapshotCommonController( | ||
| snapClient, | ||
| kubeClient, | ||
| factory.Snapshot().V1beta1().VolumeSnapshots(), | ||
| factory.Snapshot().V1beta1().VolumeSnapshotContents(), | ||
| factory.Snapshot().V1beta1().VolumeSnapshotClasses(), | ||
| coreFactory.Core().V1().PersistentVolumeClaims(), | ||
| *createSnapshotContentRetryCount, | ||
| *createSnapshotContentInterval, | ||
| *resyncPeriod, | ||
| ) | ||
|
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| run := func(context.Context) { | ||
| // run... | ||
| stopCh := make(chan struct{}) | ||
| factory.Start(stopCh) | ||
| coreFactory.Start(stopCh) | ||
| go ctrl.Run(threads, stopCh) | ||
|
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| // ...until SIGINT | ||
| c := make(chan os.Signal, 1) | ||
| signal.Notify(c, os.Interrupt) | ||
| <-c | ||
| close(stopCh) | ||
| } | ||
|
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| if !*leaderElection { | ||
| run(context.TODO()) | ||
| } else { | ||
| lockName := fmt.Sprintf("%s-%s", prefix, strings.Replace("common-snapshotter", "/", "-", -1)) | ||
| le := leaderelection.NewLeaderElection(kubeClient, lockName, run) | ||
| if *leaderElectionNamespace != "" { | ||
| le.WithNamespace(*leaderElectionNamespace) | ||
| } | ||
| if err := le.Run(); err != nil { | ||
| klog.Fatalf("failed to initialize leader election: %v", err) | ||
| } | ||
| } | ||
| } | ||
|
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| func buildConfig(kubeconfig string) (*rest.Config, error) { | ||
| if kubeconfig != "" { | ||
| return clientcmd.BuildConfigFromFlags("", kubeconfig) | ||
| } | ||
| return rest.InClusterConfig() | ||
| } | ||
|
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| func supportsControllerCreateSnapshot(ctx context.Context, conn *grpc.ClientConn) (bool, error) { | ||
| capabilities, err := csirpc.GetControllerCapabilities(ctx, conn) | ||
| if err != nil { | ||
| return false, err | ||
| } | ||
|
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||
| return capabilities[csi.ControllerServiceCapability_RPC_CREATE_DELETE_SNAPSHOT], nil | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,6 @@ | ||
| FROM gcr.io/distroless/static:latest | ||
| LABEL maintainers="Kubernetes Authors" | ||
| LABEL description="CSI External Snapshotter Sidecar" | ||
|
|
||
| COPY ./bin/csi-snapshotter-sidecar csi-snapshotter-sidecar | ||
| ENTRYPOINT ["/csi-snapshotter-sidecar"] |
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