{"id":50082,"date":"2023-04-01T01:56:49","date_gmt":"2023-01-13T21:11:13","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e6%a4%9c%e8%a8%bc-kubernetes-%e7%9a%84-statefulset-%e6%97%b6%e7%9a%84%e5%a4%87%e5%bf%98%e5%bd%95%e3%80%82\/"},"modified":"2024-04-29T21:22:52","modified_gmt":"2024-04-29T13:22:52","slug":"%e6%a4%9c%e8%a8%bc-kubernetes-%e7%9a%84-statefulset-%e6%97%b6%e7%9a%84%e5%a4%87%e5%bf%98%e5%bd%95%e3%80%82","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e6%a4%9c%e8%a8%bc-kubernetes-%e7%9a%84-statefulset-%e6%97%b6%e7%9a%84%e5%a4%87%e5%bf%98%e5%bd%95%e3%80%82\/","title":{"rendered":"\u691c\u8a3c Kubernetes \u7684 StatefulSet \u65f6\u7684\u5907\u5fd8\u5f55"},"content":{"rendered":"

\u9a8c\u8bc1\u548c\u786e\u8ba4\u7ba1\u7406\u6709\u72b6\u6001\u5bb9\u5668\u7684StatefulSet\u884c\u4e3a\u65f6\u7684\u7b14\u8bb0\u3002<\/p>\n

\u6709\u72b6\u6001\u526f\u672c\u96c6<\/p>\n

\u4f7f\u7528\u6709\u72b6\u6001\u96c6\u5408\uff08Stateful Sets\uff09\u90e8\u7f72Cassandra<\/p>\n

\u73af\u5883<\/h1>\n
 kubectl version\r\nClient Version: version.Info{<\/span>Major:\"1\"<\/span>, Minor:\"10\"<\/span>, GitVersion:\"v1.10.3\"<\/span>, GitCommit:\"2bba0127d85d5a46ab4b778548be28623b32d0b0\"<\/span>, GitTreeState:\"clean\"<\/span>, BuildDate:\"2018-05-28T20:03:09Z\"<\/span>, GoVersion:\"go1.9.3\"<\/span>, Compiler:\"gc\"<\/span>, Platform:\"darwin\/amd64\"<\/span>}<\/span>\r\nServer Version: version.Info{<\/span>Major:\"1\"<\/span>, Minor:\"11+\"<\/span>, GitVersion:\"v1.11.5-eks-6bad6d\"<\/span>, GitCommit:\"6bad6d9c768dc0864dab48a11653aa53b5a47043\"<\/span>, GitTreeState:\"clean\"<\/span>, BuildDate:\"2018-12-06T23:13:14Z\"<\/span>, GoVersion:\"go1.10.3\"<\/span>, Compiler:\"gc\"<\/span>, Platform:\"linux\/amd64\"<\/span>}<\/span>\r\n<\/code><\/pre>\n
\u5c1d\u8bd5\u90e8\u7f72\u5177\u6709Stateful Sets\u7684Cassandra\u6559\u7a0b\u793a\u4f8b\u3002<\/h1>\n
\u521b\u5efa\u4e00\u4e2a\u65e0\u5934\u670d\u52a1\u7684Cassandra<\/h2>\n
\u9996\u5148\u521b\u5efa\u4e00\u4e2a\u670d\u52a1\u3002<\/p>\n
apiVersion<\/span>:<\/span> v1<\/span>\r\nkind<\/span>:<\/span> Service<\/span>\r\nmetadata<\/span>:<\/span>\r\n  labels<\/span>:<\/span>\r\n    app<\/span>:<\/span> cassandra<\/span>\r\n  name<\/span>:<\/span> cassandra<\/span>\r\nspec<\/span>:<\/span>\r\n  clusterIP<\/span>:<\/span> None<\/span>\r\n  ports<\/span>:<\/span>\r\n  -<\/span> port<\/span>:<\/span> 9042<\/span>\r\n  selector<\/span>:<\/span>\r\n    app<\/span>:<\/span> cassandra<\/span>\r\n<\/code><\/pre>\n
# Service \u3092\u4f5c\u6210<\/span>\r\n$kubectl<\/span> create -f<\/span> https:\/\/k8s.io\/examples\/application\/cassandra\/cassandra-service.yaml\r\nservice \"cassandra\"<\/span> created\r\n\r\nservice \"cassandra\"<\/span> created\r\n\r\n# \u4f5c\u6210\u3092\u78ba\u8a8d<\/span>\r\n$kubectl<\/span> get svc cassandra\r\nNAME        TYPE        CLUSTER-IP   EXTERNAL-IP   PORT(<\/span>S)<\/span>    AGE\r\ncassandra   ClusterIP   None         <none>        9042\/TCP   40s\r\n<\/code><\/pre>\n
\u4f7f\u7528StatefulSet\u521b\u5efaCassandra\u73af\/\u9a8c\u8bc1Cassandra\u7684StatefulSet<\/h2>\n
apiVersion<\/span>:<\/span> apps\/v1<\/span>\r\nkind<\/span>:<\/span> StatefulSet<\/span>\r\nmetadata<\/span>:<\/span>\r\n  name<\/span>:<\/span> cassandra<\/span>\r\n  labels<\/span>:<\/span>\r\n    app<\/span>:<\/span> cassandra<\/span>\r\nspec<\/span>:<\/span>\r\n  serviceName<\/span>:<\/span> cassandra<\/span>\r\n  replicas<\/span>:<\/span> 3<\/span>\r\n  selector<\/span>:<\/span>\r\n    matchLabels<\/span>:<\/span>\r\n      app<\/span>:<\/span> cassandra<\/span>\r\n  template<\/span>:<\/span>\r\n    metadata<\/span>:<\/span>\r\n      labels<\/span>:<\/span>\r\n        app<\/span>:<\/span> cassandra<\/span>\r\n    spec<\/span>:<\/span>\r\n      terminationGracePeriodSeconds<\/span>:<\/span> 1800<\/span>\r\n      containers<\/span>:<\/span>\r\n      -<\/span> name<\/span>:<\/span> cassandra<\/span>\r\n        image<\/span>:<\/span> gcr.io\/google-samples\/cassandra:v13<\/span>\r\n        imagePullPolicy<\/span>:<\/span> Always<\/span>\r\n        ports<\/span>:<\/span>\r\n        -<\/span> containerPort<\/span>:<\/span> 7000<\/span>\r\n          name<\/span>:<\/span> intra-node<\/span>\r\n        -<\/span> containerPort<\/span>:<\/span> 7001<\/span>\r\n          name<\/span>:<\/span> tls-intra-node<\/span>\r\n        -<\/span> containerPort<\/span>:<\/span> 7199<\/span>\r\n          name<\/span>:<\/span> jmx<\/span>\r\n        -<\/span> containerPort<\/span>:<\/span> 9042<\/span>\r\n          name<\/span>:<\/span> cql<\/span>\r\n        resources<\/span>:<\/span>\r\n          limits<\/span>:<\/span>\r\n            cpu<\/span>:<\/span> \"<\/span>500m\"<\/span>\r\n            memory<\/span>:<\/span> 1Gi<\/span>\r\n          requests<\/span>:<\/span>\r\n            cpu<\/span>:<\/span> \"<\/span>500m\"<\/span>\r\n            memory<\/span>:<\/span> 1Gi<\/span>\r\n        securityContext<\/span>:<\/span>\r\n          capabilities<\/span>:<\/span>\r\n            add<\/span>:<\/span>\r\n              -<\/span> IPC_LOCK<\/span>\r\n        lifecycle<\/span>:<\/span>\r\n          preStop<\/span>:<\/span>\r\n            exec<\/span>:<\/span>\r\n              command<\/span>:<\/span> \r\n              -<\/span> \/bin\/sh<\/span>\r\n              -<\/span> -c<\/span>\r\n              -<\/span> nodetool drain<\/span>\r\n        env<\/span>:<\/span>\r\n          -<\/span> name<\/span>:<\/span> MAX_HEAP_SIZE<\/span>\r\n            value<\/span>:<\/span> 512M<\/span>\r\n          -<\/span> name<\/span>:<\/span> HEAP_NEWSIZE<\/span>\r\n            value<\/span>:<\/span> 100M<\/span>\r\n          -<\/span> name<\/span>:<\/span> CASSANDRA_SEEDS<\/span>\r\n            value<\/span>:<\/span> \"<\/span>cassandra-0.cassandra.default.svc.cluster.local\"<\/span>\r\n          -<\/span> name<\/span>:<\/span> CASSANDRA_CLUSTER_NAME<\/span>\r\n            value<\/span>:<\/span> \"<\/span>K8Demo\"<\/span>\r\n          -<\/span> name<\/span>:<\/span> CASSANDRA_DC<\/span>\r\n            value<\/span>:<\/span> \"<\/span>DC1-K8Demo\"<\/span>\r\n          -<\/span> name<\/span>:<\/span> CASSANDRA_RACK<\/span>\r\n            value<\/span>:<\/span> \"<\/span>Rack1-K8Demo\"<\/span>\r\n          -<\/span> name<\/span>:<\/span> POD_IP<\/span>\r\n            valueFrom<\/span>:<\/span>\r\n              fieldRef<\/span>:<\/span>\r\n                fieldPath<\/span>:<\/span> status.podIP<\/span>\r\n        readinessProbe<\/span>:<\/span>\r\n          exec<\/span>:<\/span>\r\n            command<\/span>:<\/span>\r\n            -<\/span> \/bin\/bash<\/span>\r\n            -<\/span> -c<\/span>\r\n            -<\/span> \/ready-probe.sh<\/span>\r\n          initialDelaySeconds<\/span>:<\/span> 15<\/span>\r\n          timeoutSeconds<\/span>:<\/span> 5<\/span>\r\n        # These volume mounts are persistent. They are like inline claims,<\/span>\r\n        # but not exactly because the names need to match exactly one of<\/span>\r\n        # the stateful pod volumes.<\/span>\r\n        volumeMounts<\/span>:<\/span>\r\n        -<\/span> name<\/span>:<\/span> cassandra-data<\/span>\r\n          mountPath<\/span>:<\/span> \/cassandra_data<\/span>\r\n  # These are converted to volume claims by the controller<\/span>\r\n  # and mounted at the paths mentioned above.<\/span>\r\n  # do not use these in production until ssd GCEPersistentDisk or other ssd pd<\/span>\r\n  volumeClaimTemplates<\/span>:<\/span>\r\n  -<\/span> metadata<\/span>:<\/span>\r\n      name<\/span>:<\/span> cassandra-data<\/span>\r\n    spec<\/span>:<\/span>\r\n      accessModes<\/span>:<\/span> [<\/span> \"<\/span>ReadWriteOnce\"<\/span> ]<\/span>\r\n      storageClassName<\/span>:<\/span> fast<\/span>\r\n      resources<\/span>:<\/span>\r\n        requests<\/span>:<\/span>\r\n          storage<\/span>:<\/span> 1Gi<\/span>\r\n---<\/span>\r\nkind<\/span>:<\/span> StorageClass<\/span>\r\napiVersion<\/span>:<\/span> storage.k8s.io\/v1<\/span>\r\nmetadata<\/span>:<\/span>\r\n  name<\/span>:<\/span> fast<\/span>\r\nprovisioner<\/span>:<\/span> k8s.io\/minikube-hostpath<\/span>\r\nparameters<\/span>:<\/span>\r\n  type<\/span>:<\/span> pd-ssd<\/span>\r\n<\/code><\/pre>\n
\u50a8\u7269\u67dc \u8fd9\u53ef\u80fd\u4e0d\u8d77\u4f5c\u7528\u3002
\n\u867d\u8bf4\u8fd9\u6837\uff0c\u8fd8\u662f\u8bd5\u8bd5\u770b\u5427\u3002<\/p>\n
# \u30de\u30cb\u30d5\u30a7\u30b9\u30c8\u30d5\u30a1\u30a4\u30eb\u9069\u7528.statefull set \u3092 storageclass \u3092\u4f5c\u6210<\/span>\r\n$kubectl<\/span> create -f<\/span> https:\/\/k8s.io\/examples\/application\/cassandra\/cassandra-statefulset.yaml\r\nstatefulset.apps \"cassandra\"<\/span> created\r\nstorageclass.storage.k8s.io \"fast\"<\/span> created\r\n\r\n# \u4e00\u3064\u306e\u307f\u8d77\u52d5<\/span>\r\n$kubectl<\/span> get statefulset cassandra\r\nNAME        DESIRED   CURRENT   AGE\r\ncassandra   3         1         3m\r\n\r\n\r\n# Pod \u306f pending \u306b\u306a\u3063\u3066\u3044\u308b<\/span>\r\n$ <\/span>kubectl get pods -l<\/span>=<\/span>\"app=cassandra\"<\/span>\r\nNAME          READY     STATUS    RESTARTS   AGE\r\ncassandra-0   0\/1       Pending   0          4m\r\n\r\n# \u3084\u306f\u308a Volume \u306e\u7b87\u6240\u3067\u30a8\u30e9\u30fc<\/span>\r\n$ <\/span>kubectl describe pod cassandra-0\r\n(<\/span>\u4e00\u90e8\u7565)<\/span>\r\n\r\nEvents:\r\n  Type     Reason            Age               From               Message\r\n  ----<\/span>     ------<\/span>            ----<\/span>              ----<\/span>               -------<\/span>\r\n  Warning  FailedScheduling  1s (<\/span>x94 over 5m)<\/span>  default-scheduler  pod has unbound PersistentVolumeClaims (<\/span>repeated 3 times<\/span>)<\/span>\r\n\r\n# pvc(PersistentVolumeClaim) \u3092\u78ba\u8a8d.\u30a8\u30e9\u30fc<\/span>\r\n$kubectl<\/span> describe pvc cassandra-data-cassandra-0\r\nName:          cassandra-data-cassandra-0\r\nNamespace:     default\r\nStorageClass:  fast\r\nStatus:        Pending\r\nVolume:\r\nLabels:        app<\/span>=<\/span>cassandra\r\nAnnotations:   volume.beta.kubernetes.io\/storage-provisioner=<\/span>k8s.io\/minikube-hostpath\r\nFinalizers:    [<\/span>kubernetes.io\/pvc-protection]\r\nCapacity:\r\nAccess Modes:\r\nEvents:\r\n  Type    Reason                Age                From                         Message\r\n  ----<\/span>    ------<\/span>                ----<\/span>               ----<\/span>                         -------<\/span>\r\n  Normal  ExternalProvisioning  57s (<\/span>x26 over 6m)<\/span>  persistentvolume-controller  waiting for <\/span>a volume to be created, either by external provisioner \"k8s.io\/minikube-hostpath\"<\/span> or manually created by system administrator\r\n<\/code><\/pre>\n
\u8fd8\u662f\u5931\u8d25\u4e86\uff0c\u65e0\u6cd5\u521b\u5efa\u5377\u3002
\n\u5148\u5220\u9664\uff0c\u7136\u540e\u91cd\u65b0\u521b\u5efa\u3002<\/p>\n
# \u4e00\u65e6\u524a\u9664<\/span>\r\n$ <\/span>kubectl delete -f<\/span> https:\/\/k8s.io\/examples\/application\/cassandra\/cassandra-statefulset.yaml\r\n\r\nstatefulset.apps \"cassandra\"<\/span> deleted\r\nstorageclass.storage.k8s.io \"fast\"<\/span> deleted\r\n\r\n<\/code><\/pre>\n
\u5728 EKS \u4e2d\u9ed8\u8ba4\u521b\u5efa\u4e86\u4f7f\u7528 EBS \u7684 StorageClass\uff0c\u8fd9\u662f\u5728 Manifest \u6587\u4ef6\u4e2d\u5b9a\u4e49\u7684\u3002<\/p>\n
$kubectl<\/span> get storageclass gp2\r\nNAME            PROVISIONER             AGE\r\ngp2 (<\/span>default)<\/span>   kubernetes.io\/aws-ebs   6d\r\n<\/code><\/pre>\n
\u56e0\u6b64\uff0c\u9700\u8981\u4fee\u6539\u6e05\u5355\u6587\u4ef6\u4ee5\u5229\u7528\u6b64\u529f\u80fd\u3002
\n\u5220\u9664\u5b58\u50a8\u7c7b\u7684\u5b9a\u4e49\uff0c\u5c06\u4f7f\u7528\u7684\u5b58\u50a8\u7c7b\u66f4\u6539\u4e3a\u5df2\u5b58\u5728\u7684 gp2 \u7c7b\u578b\u3002<\/p>\n
$diff<\/span> cassandra-statefulset.yaml cassandra-statefulset.yaml.1\r\n89c89\r\n<       storageClassName: gp2\r\n---<\/span>\r\n><\/span>       storageClassName: fast\r\n92a93,100\r\n><\/span> ---<\/span>\r\n><\/span> kind: StorageClass\r\n><\/span> apiVersion: storage.k8s.io\/v1\r\n><\/span> metadata:\r\n><\/span>   name: fast\r\n><\/span> provisioner: k8s.io\/minikube-hostpath\r\n><\/span> parameters:\r\n><\/span>   type<\/span>: pd-ssd\r\n<\/code><\/pre>\n
\u91cd\u65b0\u6267\u884c\u3002<\/p>\n
$kubectl<\/span> apply -f<\/span> cassandra-statefulset.yaml\r\n<\/code><\/pre>\n
\u55ef…\u540c\u6837\u7684\u9519\u8bef…
\n\u770b\u8d77\u6765\u4e4b\u524d\u521b\u5efa\u5931\u8d25\u7684 pvc \u4ecd\u7136\u5b58\u5728\uff0c\u5e76\u4e14\u5c1d\u8bd5\u4f7f\u7528\u5b83\u4f1a\u5bfc\u81f4\u76f8\u540c\u7684\u9519\u8bef\u3002
\n\u6839\u636e\u4ee5\u4e0b\u8fdb\u884c\u5220\u9664\u3002<\/p>\n
$ <\/span>kubectl delete pvc cassandra-data-cassandra-0\r\n<\/code><\/pre>\n
\u7ecf\u8fc7\u90a3\u4e4b\u540e\uff0c\u91cd\u65b0\u7533\u8bf7\u4e00\u6b21\u5c31\u6210\u529f\u4e86\u3002<\/p>\n
# \u8981\u6c42\u3057\u305f3\u3064\u306e Pod \u304c\u8d77\u52d5\u3057\u3066\u3044\u308b<\/span>\r\n$kubectl<\/span> get statefulset\r\nNAME        DESIRED   CURRENT   AGE\r\ncassandra   3         3         4m\r\n\r\n# 3\u3064\u306e Pod \u304c\u4f5c\u6210\u3055\u308c\u3066\u3044\u308b<\/span>\r\n$ <\/span>kubectl get pods -l<\/span>=<\/span>\"app=cassandra\"<\/span>\r\nNAME          READY     STATUS    RESTARTS   AGE\r\ncassandra-0   1\/1       Running   0          5m\r\ncassandra-1   1\/1       Running   0          4m\r\ncassandra-2   1\/1       Running   0          3m\r\n\r\n\r\n# pvc \u30823\u3064\u8d77\u52d5<\/span>\r\n$ <\/span>kubectl get pvc\r\nNAME                         STATUS    VOLUME                                     CAPACITY   ACCESS MODES   STORAGECLASS   AGE\r\ncassandra-data-cassandra-0   Bound     pvc-9c0a9803-0964-11e9-b090-0ae6cc179478   1Gi        RWO            gp2            6m\r\ncassandra-data-cassandra-1   Bound     pvc-bd510f3a-0964-11e9-b090-0ae6cc179478   1Gi        RWO            gp2            5m\r\ncassandra-data-cassandra-2   Bound     pvc-ee1121f4-0964-11e9-b090-0ae6cc179478   1Gi        RWO            gp2            4m\r\n\r\n<\/code><\/pre>\n
\u4fee\u6539Cassandra StatefulSet<\/h2>\n
\u4fee\u6539\u5df2\u521b\u5efa\u7684StatefulSet\u3002
\n\u5c06replicas\u5b57\u6bb5\u4ece”3″\u4fee\u6539\u4e3a”4″\u3002<\/p>\n
# edit \u30b3\u30de\u30f3\u30c9\u3067\u7de8\u96c6.\u901a\u5e38\u3067\u3042\u308c\u3070\u30de\u30cb\u30e5\u30d5\u30a7\u30b9\u30c8\u30d5\u30a1\u30a4\u30eb\u3092\u5909\u66f4\u3059\u308b<\/span>\r\n$kubectl<\/span> edit statefulset cassandra\r\nstatefulset.apps \"cassandra\"<\/span> edited\r\n\r\n# \u5909\u66f4\u306b\u3088\u3063\u3066 Pod \u6570\u304c 3 \u304b\u3089 4 \u306b\u306a\u3063\u305f<\/span>\r\n$ <\/span>kubectl get statefulset\r\nNAME        DESIRED   CURRENT   AGE\r\ncassandra   4         4         12m\r\n\r\n# \u65b0\u3057\u3044 Pod cassandra-3 \u304c\u51fa\u6765\u305f<\/span>\r\n$ <\/span>kubectl get pods -l<\/span>=<\/span>\"app=cassandra\"<\/span>\r\nNAME          READY     STATUS    RESTARTS   AGE\r\ncassandra-0   1\/1       Running   0          12m\r\ncassandra-1   1\/1       Running   0          11m\r\ncassandra-2   1\/1       Running   0          10m\r\ncassandra-3   0\/1       Running   0          43s\r\n\r\n<\/code><\/pre>\n
\u5982\u524d\u6240\u8ff0\uff0cStatefulSet \u4e2d\u7684 Pod \u540d\u88ab\u547d\u540d\u4e3a\u201c(StatefulSet \u540d)-N\u201d\u7684\u5f62\u5f0f\uff0c\u5f53\u6dfb\u52a0\u4e00\u4e2a Pod \u540e\uff0c\u5c06\u521b\u5efa N+1 \u4e2a Pod \u540d\u3002<\/p>\n
\u4e0d\u59a8\u8bd5\u8bd5\u7f29\u5c0f\u89c4\u6a21\u770b\u770b\u3002<\/p>\n
# replica \u6570\u3092 4 \u304b\u3089 3 \u306b\u3059\u308b<\/span>\r\n$$<\/span>kubectl edit statefulset cassandra\r\nstatefulset.apps \"cassandra\"<\/span> edited\r\n\r\n# \u4e00\u756a\u65b0\u3057\u3044 Pod \u304c\u524a\u9664\u3055\u308c\u308b<\/span>\r\n$ <\/span>kubectl get pods -l<\/span>=<\/span>\"app=cassandra\"<\/span>\r\nNAME          READY     STATUS    RESTARTS   AGE\r\ncassandra-0   1\/1       Running   0          16m\r\ncassandra-1   1\/1       Running   0          15m\r\ncassandra-2   1\/1       Running   0          14m\r\n\r\n<\/code><\/pre>\n
\u6b64\u5916\uff0c\u5373\u4f7f\u5728\u4e0a\u8ff0\u60c5\u51b5\u4e0b\uff0cpvc \u4e5f\u6ca1\u6709\u88ab\u5220\u9664\uff0c\u56e0\u6b64\u5982\u679c\u4e0d\u9700\u8981\u7684\u8bdd\u5c31\u8981\u8fdb\u884c\u5220\u9664\u3002<\/p>\n
$kubectl<\/span> get pvc\r\nNAME                         STATUS    VOLUME                                     CAPACITY   ACCESS MODES   STORAGECLASS   AGE\r\ncassandra-data-cassandra-0   Bound     pvc-9c0a9803-0964-11e9-b090-0ae6cc179478   1Gi        RWO            gp2            22m\r\ncassandra-data-cassandra-1   Bound     pvc-bd510f3a-0964-11e9-b090-0ae6cc179478   1Gi        RWO            gp2            21m\r\ncassandra-data-cassandra-2   Bound     pvc-ee1121f4-0964-11e9-b090-0ae6cc179478   1Gi        RWO            gp2            19m\r\ncassandra-data-cassandra-3   Bound     pvc-49d749e9-0966-11e9-b090-0ae6cc179478   1Gi        RWO            gp2            10m\r\n\r\n$kubectl<\/span> delete pvc cassandra-data-cassandra-3\r\npersistentvolumeclaim \"cassandra-data-cassandra-3\"<\/span> deleted\r\n<\/code><\/pre>\n
\u786e\u8ba4\u5f53Pod\u6b7b\u673a\u65f6\u7684\u884c\u4e3a<\/h1>\n
\u5728\u5de5\u4f5c\u8282\u70b9\u7a81\u7136\u5b95\u673a\u6216\u5176\u4ed6\u610f\u5916\u60c5\u51b5\u4e0b\uff0c\u9a8c\u8bc1\u5f53 Pod \u53d1\u751f\u610f\u5916\u7ec8\u6b62\u65f6\u7684\u884c\u4e3a\u3002
\n\u4e3a\u4e86\u8fdb\u884c\u9a8c\u8bc1\uff0c\u9884\u5148\u5c06\u6d4b\u8bd5\u6587\u4ef6\u521b\u5efa\u5230\u6302\u8f7d\u5728\u5373\u5c06\u88ab\u5220\u9664\u7684 Pod \u4e0a\u7684\u5377\u4e2d\uff0c\u7136\u540e\u5c1d\u8bd5\u5220\u9664\u8be5 Pod\u3002<\/p>\n
# volume \u914d\u4e0b\u306b\u30c6\u30b9\u30c8\u30d5\u30a1\u30a4\u30eb\u3092\u4f5c\u6210<\/span>\r\n$kubectl<\/span> exec<\/span> -it<\/span> cassandra-0 --<\/span> touch<\/span> \/cassandra_data\/test.txt\r\n\r\n# \u5b58\u5728\u78ba\u8a8d<\/span>\r\n$ <\/span>kubectl exec<\/span> -it<\/span> cassandra-0 --<\/span> ls<\/span> \/cassandra_data\/\r\ncommitlog  data  hints  lost+found  saved_caches  test.txt\r\n\r\n# Pod \u3092\u660e\u793a\u7684\u306b\u524a\u9664 <\/span>\r\n$kubectl<\/span> delete pod cassandra-0\r\npod \"cassandra-0\"<\/span> deleted\r\n\r\n# \u3059\u3050\u306b\u540c\u3058\u540d\u524d\u3067 Pod \u304c\u4f5c\u308c\u308b<\/span>\r\n$kubectl<\/span> get pods -l<\/span>=<\/span>\"app=cassandra\"<\/span>\r\nNAME          READY     STATUS              RESTARTS   AGE\r\ncassandra-0   0\/1       ContainerCreating   0          4s\r\ncassandra-1   1\/1       Running             0          29m\r\ncassandra-2   1\/1       Running             0          27m\r\n\r\n# \u540c\u3058 Volume \u3092\u4f7f\u3063\u3066\u3044\u308b\u306e\u3067\u5148\u7a0b\u4f5c\u6210\u3057\u305f test.txt \u304c\u5b58\u5728\u3059\u308b<\/span>\r\n$kubectl<\/span> exec<\/span> -it<\/span> cassandra-0 --<\/span> ls<\/span> \/cassandra_data\/\r\ncommitlog  data  hints  lost+found  saved_caches  test.txt\r\n\r\n# pvc \u306f\u540c\u3058<\/span>\r\n$ <\/span>kubectl describe pod cassandra-0 |grep Claim\r\n    Type:       PersistentVolumeClaim (<\/span>a reference to a PersistentVolumeClaim in <\/span>the same namespace)<\/span>\r\n    ClaimName:  cassandra-data-cassandra-0\r\n\r\n# pvc \u306f\u518d\u4f5c\u6210\u306a\u3069\u3055\u308c\u3066\u304a\u3089\u305a\u3001\u540c\u3058 Volume \u304c\u30de\u30a6\u30f3\u30c8\u3055\u308c\u3066\u3044\u308b<\/span>\r\n$kubectl<\/span> get pvc\r\nNAME                         STATUS    VOLUME                                     CAPACITY   ACCESS MODES   STORAGECLASS   AGE\r\ncassandra-data-cassandra-0   Bound     pvc-9c0a9803-0964-11e9-b090-0ae6cc179478   1Gi        RWO            gp2            33m\r\ncassandra-data-cassandra-1   Bound     pvc-bd510f3a-0964-11e9-b090-0ae6cc179478   1Gi        RWO            gp2            32m\r\ncassandra-data-cassandra-2   Bound     pvc-ee1121f4-0964-11e9-b090-0ae6cc179478   1Gi        RWO            gp2            31m\r\n\r\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
\u9a8c\u8bc1\u548c\u786e\u8ba4\u7ba1\u7406\u6709\u72b6\u6001\u5bb9\u5668\u7684StatefulSet\u884c\u4e3a\u65f6\u7684\u7b14\u8bb0\u3002 \u6709\u72b6\u6001\u526f\u672c\u96c6 \u4f7f\u7528\u6709\u72b6\u6001\u96c6\u5408\uff08Stateful […]<\/p>\n","protected":false},"author":6,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-50082","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"\n\u691c\u8a3c Kubernetes \u7684 StatefulSet \u65f6\u7684\u5907\u5fd8\u5f55 - Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/zh\/blog\/\u691c\u8a3c-kubernetes-\u7684-statefulset-\u65f6\u7684\u5907\u5fd8\u5f55\u3002\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u691c\u8a3c Kubernetes \u7684 StatefulSet \u65f6\u7684\u5907\u5fd8\u5f55\" \/>\n<meta property=\"og:description\" content=\"\u9a8c\u8bc1\u548c\u786e\u8ba4\u7ba1\u7406\u6709\u72b6\u6001\u5bb9\u5668\u7684StatefulSet\u884c\u4e3a\u65f6\u7684\u7b14\u8bb0\u3002 \u6709\u72b6\u6001\u526f\u672c\u96c6 \u4f7f\u7528\u6709\u72b6\u6001\u96c6\u5408\uff08Stateful […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/\u691c\u8a3c-kubernetes-\u7684-statefulset-\u65f6\u7684\u5907\u5fd8\u5f55\u3002\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - 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