{"id":42239,"date":"2023-06-06T23:08:04","date_gmt":"2023-09-17T18:44:33","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%9c%a8%e5%8d%95%e8%8a%82%e7%82%b9kubernetes%e9%9b%86%e7%be%a4%e4%b8%ad%ef%bc%8c%e5%b0%9d%e8%af%95%e6%93%8d%e4%bd%9cpv%e5%92%8cpvc%e3%80%82\/"},"modified":"2024-04-30T07:39:12","modified_gmt":"2024-04-29T23:39:12","slug":"%e5%9c%a8%e5%8d%95%e8%8a%82%e7%82%b9kubernetes%e9%9b%86%e7%be%a4%e4%b8%ad%ef%bc%8c%e5%b0%9d%e8%af%95%e6%93%8d%e4%bd%9cpv%e5%92%8cpvc%e3%80%82","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%9c%a8%e5%8d%95%e8%8a%82%e7%82%b9kubernetes%e9%9b%86%e7%be%a4%e4%b8%ad%ef%bc%8c%e5%b0%9d%e8%af%95%e6%93%8d%e4%bd%9cpv%e5%92%8cpvc%e3%80%82\/","title":{"rendered":"\u5728\u5355\u8282\u70b9Kubernetes\u96c6\u7fa4\u4e2d\uff0c\u5c1d\u8bd5\u64cd\u4f5cPV\u548cPVC"},"content":{"rendered":"

\u4f60\u597d\u3002
\n\u6211\u662fClass Act\u57fa\u7840\u8bbe\u65bd\u4e8b\u4e1a\u90e8\u7684\u5927\u585a\u3002<\/p>\n

\u4e0a\u6b21\uff0c\u6211\u5b66\u4e60\u4e86\u5728Docker\u4e0a\u521b\u5efa\u5377\u4ee5\u53ca\u5c06\u5176\u6302\u8f7d\u5230\u5bb9\u5668\u7684\u65b9\u6cd5\uff0c\u5e76\u5c1d\u8bd5\u4e86\u5b9e\u9645\u64cd\u4f5c\u3002\u4e0b\u9762\u662f\u5177\u4f53\u5185\u5bb9\u3002<\/p>\n

 <\/p>\n

\u8fd9\u6b21\u6211\u60f3\u5728Kubernetes\u4e0a\u505a\u7c7b\u4f3c\u4e8e\u4e0a\u9762\u63d0\u5230\u7684\u4e8b\u60c5\u3002
\n\u6211\u8ba4\u4e3aKubernetes\u7684\u4f18\u70b9\u5728\u4e8e\u53ef\u4ee5\u5728\u591a\u8282\u70b9\u4e0a\u90e8\u7f72\u548c\u7ba1\u7406Pod\uff08\u5bb9\u5668\uff09\uff0c\u4f46\u662f\u5982\u679c\u76f4\u63a5\u5728\u591a\u8282\u70b9\u4e0a\u64cd\u4f5c\u53ef\u80fd\u4f1a\u8ba9\u4eba\u5934\u8111\u6df7\u4e71\uff0c\u6240\u4ee5\u6211\u6253\u7b97\u5148\u5728\u5355\u8282\u70b9\u7684k8s\u96c6\u7fa4\u4e0a\u5c1d\u8bd5\u4e00\u4e0b\uff0c\u4e4b\u540e\u518d\u9010\u6b65\u5728\u591a\u8282\u70b9\u7684k8s\u96c6\u7fa4\u73af\u5883\u4e2d\u8fdb\u884c\u64cd\u4f5c\u3002<\/p>\n

\u73af\u5883<\/h1>\n

\u5728Ubuntu 22.04\u4e0a\u542f\u52a8\u865a\u62df\u673a\u3002
\n\u6b63\u5728\u5b89\u88c5microk8s\u5e76\u521b\u5efaKubernetes\u73af\u5883\u3002<\/p>\n

root@ansible-tower:~# kubectl get node -o wide\r\nNAME            STATUS   ROLES    AGE   VERSION   INTERNAL-IP    EXTERNAL-IP   OS-IMAGE             KERNEL-VERSION      CONTAINER-RUNTIME\r\nansible-tower   Ready    <none>   23h   v1.26.4   192.168.2.35   <none>        Ubuntu 22.04.2 LTS   5.15.0-71-generic   containerd:\/\/1.6.15\r\n<\/code><\/pre>\n
\u7528\u8bed –<\/h1>\n
\u89c6\u9891<\/h2>\n
\u6301\u4e45\u5377\uff08PV\uff09\u662f\u96c6\u7fa4\u5b58\u50a8\u7684\u4e00\u90e8\u5206\uff0c\u7531\u7ba1\u7406\u5458\u6216\u52a8\u6001\u5206\u914d\u4f7f\u7528\u5b58\u50a8\u7c7b\u6765\u8fdb\u884c\u7ba1\u7406\u3002\u5b83\u4e0e\u8282\u70b9\u4e00\u6837\u662f\u96c6\u7fa4\u8d44\u6e90\u7684\u4e00\u90e8\u5206\u3002PV\u662f\u7c7b\u4f3c\u4e8e\u5377\u7684\u63d2\u4ef6\uff0c\u4f46\u4e0e\u4f7f\u7528PV\u7684\u72ec\u7acbPod\u5177\u6709\u4e0d\u540c\u7684\u751f\u547d\u5468\u671f\u3002<\/p><\/blockquote>\n
\u805a\u6c2f\u4e59\u70ef<\/h2>\n
\u6301\u4e45\u5377\u7d22\u53d6(PVC)\u662f\u7531\u7528\u6237\u8bf7\u6c42\u7684\u5b58\u50a8\u8d44\u6e90\u3002\u5b83\u7c7b\u4f3c\u4e8ePod\u3002Pod\u6d88\u8017\u8282\u70b9\u8d44\u6e90\uff0c\u800cPVC\u6d88\u8017PV\u8d44\u6e90\u3002Pod\u53ef\u4ee5\u8bf7\u6c42\u7279\u5b9a\u7ea7\u522b\u7684CPU\u548c\u5185\u5b58\u8d44\u6e90\u3002\u7d22\u53d6\u53ef\u4ee5\u4ee5\u7279\u5b9a\u7684\u5927\u5c0f\u548c\u8bbf\u95ee\u6a21\u5f0f(\u4f8b\u5982\uff0cReadWriteOnce\u3001ReadOnlyMany\u3001ReadWriteMany)\u8fdb\u884c\u6302\u8f7d\u3002<\/p><\/blockquote>\n
 <\/p>\n
\u6211\u5bf9\u6b64\u7684\u7406\u89e3\u662f\uff0c\u5728\u7269\u7406\u5377\uff08PV\uff09\u4e2d\u521b\u5efa\u4e00\u4e2a\u5927\u5bb9\u91cf\u7684\u5b58\u50a8\u7a7a\u95f4\uff0c\u7136\u540e\u53ef\u4ee5\u4f7f\u7528\u903b\u8f91\u5377\uff08PVC\uff09\u6765\u5206\u5272\u5e76\u5229\u7528\u5b83\u3002\u6211\u7684\u7406\u89e3\u5982\u4e0b\uff1a<\/p>\n
\"\u540d\u79f0\u672a\u8a2d\u5b9a\u30d5\u30a1\u30a4\u30eb-\u30da\u30fc\u30b811<\/div>\n
\u9a8c\u8bc1\uff1a\u5c1d\u8bd5\u4f7f\u7528spec.persistentVolumeReclaimPolicy\u8bbe\u7f6e\u4e3a”Delete”\u90e8\u7f72\u548c\u4f7f\u7528PV\u548cPVC\u3002<\/h1>\n
\u9996\u5148\uff0c\u6211\u4eec\u5c06\u51c6\u5907PV\u3002
\n\u8fd9\u6b21\u51c6\u5907\u7684yaml\u6587\u4ef6\u5982\u4e0b\u6240\u793a\u3002<\/p>\n
apiVersion<\/span>:<\/span> v1<\/span>\r\nkind<\/span>:<\/span> PersistentVolume<\/span>\r\nmetadata<\/span>:<\/span>\r\n  name<\/span>:<\/span> my-vol<\/span>\r\nspec<\/span>:<\/span>\r\n  capacity<\/span>:<\/span>\r\n    storage<\/span>:<\/span> 5Gi<\/span>\r\n  accessModes<\/span>:<\/span>\r\n  -<\/span> ReadWriteOnce<\/span> \r\n  persistentVolumeReclaimPolicy<\/span>:<\/span> Delete<\/span>\r\n  storageClassName<\/span>:<\/span> my-vol-class<\/span>\r\n  hostPath<\/span>:<\/span>\r\n    path<\/span>:<\/span> \/tmp\/k8s-vol<\/span>\r\n    type<\/span>:<\/span> DirectoryOrCreate<\/span>\r\n<\/code><\/pre>\n
\u6211\u5c06\u7b80\u7565\u5730\u5199\u4e0b\u5728yaml\u6587\u4ef6\u4e2d\u6240\u5199\u7684\u7ec6\u8282\u3002<\/p>\n
\n
\u30b3\u30f3\u30c6\u30f3\u30c4\u610f\u5473spec.accessModes:ReadWriteOnce1\u3064\u306eNode\u304b\u3089R\/W\u3067\u30de\u30a6\u30f3\u30c8\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3002\u3053\u306e\u307b\u304b\u306bReadOnlyMany\u3084ReadWriteMany\u304c\u3042\u308b
\n\u53c2\u8003\uff1aKubernetes: ReadWriteOnce\u3068ReadWriteOncePod\u306e\u52d5\u4f5c\u691c\u8a3c<\/a>spec:persistentVolumeReclaimPolicy:DeletePVC\u304c\u524a\u9664\u3055\u308c\u308b\u3068PV\u3082\u524a\u9664\u3059\u308b\u3088\u3046\u306a\u6319\u52d5\u306b\u3059\u308b\u3002\u3053\u306e\u307b\u304b\u306bRetain\u306a\u3069\u3082\u3042\u308b\u3002
\n\u53c2\u8003\uff1aKubernetes: ReadWriteOnce\u3068ReadWriteOncePod\u306e\u52d5\u4f5c\u691c\u8a3c<\/a>spec.hostpath.path:\/tmp\/k8s-vol\u4f5c\u6210\u3059\u308bPV\u3092\u30ce\u30fc\u30c9\u306e\u3069\u306e\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u306b\u4f5c\u6210\u3059\u308b\u304b\u3092\u6307\u5b9a\u3057\u3066\u3044\u308b\u3002\u4eca\u56de\u306eyaml\u3067\u306f\/tmp\/k8s-vol\u914d\u4e0b\u306b\u4f5c\u308b\u3053\u3068\u306b\u306a\u308b\u3002spec.hostpath.type:DirectoryOrCreatespec.hostpath.path\u3067\u6307\u5b9a\u3057\u305f\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u304c\u5b58\u5728\u3057\u306a\u3044\u5834\u5408\u4f5c\u6210\u3059\u308b
\n\u53c2\u8003\uff1aKubernetes\u3067HostPath\u3092\u4f7f\u3046<\/a><\/div>\n<\/div>\n
\u6211\u4f1a\u90e8\u7f72\u5b83\u3002
\n\u770b\u8d77\u6765\u5df2\u7ecf\u5b8c\u6210\u4e86\u3002<\/p>\n
root@ansible-tower:~\/yaml# kubectl create -f my-vol.yaml\r\npersistentvolume\/my-vol created\r\n\r\nroot@ansible-tower:~\/yaml# kubectl get pv -o wide\r\nNAME     CAPACITY   ACCESS MODES   RECLAIM POLICY   STATUS      CLAIM   STORAGECLASS   REASON   AGE   VOLUMEMODE\r\nmy-vol   5Gi        RWO            Delete           Available           my-vol-class            6s    Filesystem\r\n<\/code><\/pre>\n
\u5bf9\u4e8ePV\u548c\u540e\u7eed\u63d0\u5230\u7684PVC\uff0c\u53ef\u4ee5\u50cfpod\u4e00\u6837\u8fdb\u884c\u63cf\u8ff0\u3002
\n\u4ee5\u4e0b\u662f\u5176\u7ed3\u679c\u3002\u60a8\u53ef\u4ee5\u5728\u8fd9\u91cc\u786e\u8ba4\u60a8\u5728yaml\u4e2d\u7684\u5199\u6cd5\u3002<\/p>\n
root@ansible-tower:~\/yaml# kubectl describe pv my-vol\r\nName:            my-vol\r\nLabels:          <none>\r\nAnnotations:     <none>\r\nFinalizers:      [kubernetes.io\/pv-protection]\r\nStorageClass:    my-vol-class\r\nStatus:          Available\r\nClaim:\r\nReclaim Policy:  Delete\r\nAccess Modes:    RWO\r\nVolumeMode:      Filesystem\r\nCapacity:        5Gi\r\nNode Affinity:   <none>\r\nMessage:\r\nSource:\r\n    Type:          HostPath (bare host directory volume)\r\n    Path:          \/tmp\/k8s-vol\r\n    HostPathType:  DirectoryOrCreate\r\nEvents:            <none>\r\n<\/code><\/pre>\n
\u5728\u8fd9\u4e2a\u65f6\u95f4\u70b9\uff0c\/tmp\u76ee\u5f55\u4e0b\u6ca1\u6709\u88ab\u521b\u5efa\u7684\u8282\u70b9\u3002<\/p>\n
root@ansible-tower:~\/yaml# ls \/tmp\/\r\nsnap-private-tmp                                                                systemd-private-e9093ba59c54473c8be00fd9efae24cd-systemd-resolved.service-8TljcD   ubuntu-advantage\r\nsystemd-private-e9093ba59c54473c8be00fd9efae24cd-ModemManager.service-YQKnnw    systemd-private-e9093ba59c54473c8be00fd9efae24cd-systemd-timesyncd.service-NfUEnV\r\nsystemd-private-e9093ba59c54473c8be00fd9efae24cd-systemd-logind.service-VAqu3p  systemd-private-e9093ba59c54473c8be00fd9efae24cd-upower.service-oEMHBO\r\n<\/code><\/pre>\n
PVC\u5c06\u4f1a\u88ab\u521b\u5efa\u3002
\n\u6211\u4eec\u51c6\u5907\u7684yaml\u6587\u4ef6\u5982\u4e0b\u3002<\/p>\n
apiVersion<\/span>:<\/span> v1<\/span>\r\nkind<\/span>:<\/span> PersistentVolumeClaim<\/span>\r\nmetadata<\/span>:<\/span>\r\n  name<\/span>:<\/span> pvc01-my-vol<\/span>\r\nspec<\/span>:<\/span>\r\n  resources<\/span>:<\/span>\r\n    requests<\/span>:<\/span>\r\n      storage<\/span>:<\/span> 5Gi<\/span> \r\n  accessModes<\/span>:<\/span>\r\n  -<\/span> ReadWriteOnce<\/span>\r\n  storageClassName<\/span>:<\/span> my-vol-class<\/span>\r\n<\/code><\/pre>\n
\u6839\u636eyaml\u914d\u7f6e\u6587\u4ef6\u8fdb\u884c\u90e8\u7f72\u3002
\n\u5982\u679cPVC\u7684\u72b6\u6001\u4e3aBound\uff0c\u5219\u8868\u793aPV\u548cPVC\u5df2\u7ecf\u6210\u529f\u5173\u8054\u3002<\/p>\n
root@ansible-tower:~\/yaml# kubectl create -f pvc01-my-vol.yaml\r\npersistentvolumeclaim\/pvc01-my-vol created\r\n\r\nroot@ansible-tower:~\/yaml# kubectl get pv,pvc -o wide\r\nNAME                      CAPACITY   ACCESS MODES   RECLAIM POLICY   STATUS   CLAIM                  STORAGECLASS   REASON   AGE   VOLUMEMODE\r\npersistentvolume\/my-vol   5Gi        RWO            Delete           Bound    default\/pvc01-my-vol   my-vol-class            13s   Filesystem\r\n\r\nNAME                                 STATUS   VOLUME   CAPACITY   ACCESS MODES   STORAGECLASS   AGE   VOLUMEMODE\r\npersistentvolumeclaim\/pvc01-my-vol   Bound    my-vol   5Gi        RWO            my-vol-class   46s   Filesystem\r\n<\/code><\/pre>\n
\u6211\u4f1a\u67e5\u770bPVC\u7684\u63cf\u8ff0\u4ee5\u83b7\u5f97\u66f4\u591a\u8be6\u7ec6\u4fe1\u606f\u3002<\/p>\n
root@ansible-tower:~\/yaml# kubectl describe pvc pvc01-my-vol\r\nName:          pvc01-my-vol\r\nNamespace:     default\r\nStorageClass:  my-vol-class\r\nStatus:        Bound\r\nVolume:        my-vol\r\nLabels:        <none>\r\nAnnotations:   pv.kubernetes.io\/bind-completed: yes\r\n               pv.kubernetes.io\/bound-by-controller: yes\r\nFinalizers:    [kubernetes.io\/pvc-protection]\r\nCapacity:      5Gi\r\nAccess Modes:  RWO\r\nVolumeMode:    Filesystem\r\nUsed By:       <none>\r\n<\/code><\/pre>\n
\"\u540d\u79f0\u672a\u8a2d\u5b9a\u30d5\u30a1\u30a4\u30eb-\u30da\u30fc\u30b89<\/div>\n
\u521b\u5efa\u4e00\u4e2a\u540d\u4e3aPostgreSQL\u7684Pod\uff0c\u5e76\u5c06PVC\u6302\u8f7d\u5230\/var\/lib\/postgresql\/data\u76ee\u5f55\u4e0b\u3002
\n\u51c6\u5907\u4ee5\u4e0b\u7684YAML\u6587\u4ef6\u3002<\/p>\n
apiVersion<\/span>:<\/span> v1<\/span>\r\nkind<\/span>:<\/span> Pod<\/span>\r\nmetadata<\/span>:<\/span>\r\n  name<\/span>:<\/span> postgres01<\/span>\r\nspec<\/span>:<\/span>\r\n  containers<\/span>:<\/span>\r\n  -<\/span> name<\/span>:<\/span> postgres01<\/span>\r\n    image<\/span>:<\/span> postgres:latest<\/span>\r\n    env<\/span>:<\/span>\r\n    -<\/span> name<\/span>:<\/span> POSTGRES_PASSWORD<\/span>\r\n      value<\/span>:<\/span> \"<\/span>postgres\"<\/span>\r\n    volumeMounts<\/span>:<\/span>\r\n    -<\/span> mountPath<\/span>:<\/span> \/var\/lib\/postgresql\/data<\/span>\r\n      name<\/span>:<\/span> pvc01-my-vol<\/span>\r\n  volumes<\/span>:<\/span>\r\n  -<\/span> name<\/span>:<\/span> pvc01-my-vol<\/span>\r\n    persistentVolumeClaim<\/span>:<\/span>\r\n      claimName<\/span>:<\/span> pvc01-my-vol<\/span>\r\n<\/code><\/pre>\n
\u6211\u8981\u90e8\u7f72pod\u3002<\/p>\n
root@ansible-tower:~\/yaml# kubectl create -f vol-postgresql01.yaml\r\npod\/postgres01 created\r\n\r\nroot@ansible-tower:~\/yaml# kubectl get pod -o wide\r\nNAME         READY   STATUS    RESTARTS   AGE    IP           NODE            NOMINATED NODE   READINESS GATES\r\npostgres01   1\/1     Running   0          108s   10.1.108.9   ansible-tower   <none>           <none>\r\n<\/code><\/pre>\n
\u6211\u4f1a\u5c1d\u8bd5\u67e5\u770bPod\u7684\u8be6\u7ec6\u4fe1\u606f\uff0c\u6839\u636e\u4ee5\u4e0b\u7684\u8f93\u51fa\uff0c\u5b83\u4f3c\u4e4e\u5df2\u7ecf\u6210\u529f\u6302\u8f7d\u4e86\u3002<\/p>\n
root@ansible-tower:~\/yaml# kubectl describe pod postgres01\r\n\uff5e\u4e2d\u7565\uff5e\r\nVolumes:\r\n  pvc01-my-vol:\r\n    Type:       PersistentVolumeClaim (a reference to a PersistentVolumeClaim in the same namespace)\r\n    ClaimName:  pvc01-my-vol\r\n    ReadOnly:   false\r\n<\/code><\/pre>\n
\u5728\u6b64\u65f6\u521b\u5efa\u4e86\/tmp\/k8s-vol\u3002
\n\u4ee5\u4e0b\u662f\u5b9e\u9645\u786e\u8ba4\u7684\u65e5\u5fd7\u3002\u81ea\u52a8\u521b\u5efa\u4e86\u540d\u4e3ak8s-vol\u7684\u76ee\u5f55\uff0c\u5176\u4e0b\u53ef\u4ee5\u786e\u8ba4\u5230PostgreSQL\u7684\u6570\u636e\u5b58\u5728\u4e8e\/tmp\u76ee\u5f55\u4e2d\u3002<\/p>\n
root@ansible-tower:\/# cd \/tmp\r\nroot@ansible-tower:\/tmp# ls\r\nk8s-vol           systemd-private-7b30335e5c3847888ee14c9d4ae96fea-ModemManager.service-9JtOcV    systemd-private-7b30335e5c3847888ee14c9d4ae96fea-systemd-resolved.service-y1Y1GA\r\nsnap-private-tmp  systemd-private-7b30335e5c3847888ee14c9d4ae96fea-systemd-logind.service-f83oWV  systemd-private-7b30335e5c3847888ee14c9d4ae96fea-systemd-timesyncd.service-Mr4GTU\r\nroot@ansible-tower:\/tmp\/k8s-vol# ls\r\nbase    pg_commit_ts  pg_hba.conf    pg_logical    pg_notify    pg_serial     pg_stat      pg_subtrans  pg_twophase  pg_wal   postgresql.auto.conf  postmaster.opts\r\nglobal  pg_dynshmem   pg_ident.conf  pg_multixact  pg_replslot  pg_snapshots  pg_stat_tmp  pg_tblspc    PG_VERSION   pg_xact  postgresql.conf       postmaster.pid\r\n<\/code><\/pre>\n
\u6211\u4f1a\u5728\u5df2\u90e8\u7f72\u7684pod\u4e2d\u8fdb\u884c\u786e\u8ba4\u3002
\n\/tmp\/k8s-vol\/\u7684\u5185\u5bb9\u548c\u4e4b\u524d\u4e00\u6837\u3002<\/p>\n
root@ansible-tower:~# kubectl get pod\r\nNAME         READY   STATUS    RESTARTS   AGE\r\npostgres01   1\/1     Running   0          7h13m\r\nroot@ansible-tower:~# kubectl exec -it postgres01 -- \/bin\/bash\r\nroot@postgres01:\/# cd \/var\/lib\/postgresql\/data\r\nroot@postgres01:\/var\/lib\/postgresql\/data# ls\r\nbase    pg_commit_ts  pg_hba.conf    pg_logical    pg_notify    pg_serial     pg_stat      pg_subtrans  pg_twophase  pg_wal   postgresql.auto.conf  postmaster.opts\r\nglobal  pg_dynshmem   pg_ident.conf  pg_multixact  pg_replslot  pg_snapshots  pg_stat_tmp  pg_tblspc    PG_VERSION   pg_xact  postgresql.conf       postmaster.pid\r\n<\/code><\/pre>\n
\u6211\u5728pod\u4fa7\u521b\u5efa\u6570\u636e\uff0c\u5e76\u786e\u8ba4\u8282\u70b9\u4fa7\u662f\u5426\u80fd\u591f\u770b\u5230\u3002\u5728pod\u4e2d\u521b\u5efa\u4e00\u4e2a\u540d\u4e3atext.txt\u7684\u7a7a\u6587\u4ef6\u3002<\/p>\n
root@postgres01:\/var\/lib\/postgresql\/data# touch test.txt\r\nroot@postgres01:\/var\/lib\/postgresql\/data# ls -ltr test.txt\r\n-rw-r--r-- 1 root root 0 May 10 21:15 test.txt\r\n<\/code><\/pre>\n
\u6211\u4f1a\u5728\u8282\u70b9\u7aef\u8fdb\u884c\u786e\u8ba4\u3002\u770b\u8d77\u6765\u6ca1\u4ec0\u4e48\u95ee\u9898\u3002<\/p>\n
root@ansible-tower:~# cd \/tmp\/k8s-vol\/\r\nroot@ansible-tower:\/tmp\/k8s-vol# ls -ltr test.txt\r\n-rw-r--r-- 1 root root 0 May 10 21:15 test.txt\r\n<\/code><\/pre>\n
\"\u540d\u79f0\u672a\u8a2d\u5b9a\u30d5\u30a1\u30a4\u30eb-\u30da\u30fc\u30b810<\/div>\n
\u9996\u5148\uff0c\u6211\u4eec\u5c06\u5220\u9664\u88c5\u6709PVC\u7684Pod\uff0c\u4ee5\u786e\u8ba4\u80fd\u5426\u518d\u5229\u7528\u3002<\/p>\n
root@ansible-tower:~# kubectl delete pod postgres01\r\n\r\nroot@ansible-tower:~# kubectl get pod,pv,pvc -o wide\r\nNAME                      CAPACITY   ACCESS MODES   RECLAIM POLICY   STATUS   CLAIM                  STORAGECLASS   REASON   AGE     VOLUMEMODE\r\npersistentvolume\/my-vol   5Gi        RWO            Delete           Bound    default\/pvc01-my-vol   my-vol-class            7h31m   Filesystem\r\n\r\nNAME                                 STATUS   VOLUME   CAPACITY   ACCESS MODES   STORAGECLASS   AGE     VOLUMEMODE\r\npersistentvolumeclaim\/pvc01-my-vol   Bound    my-vol   5Gi        RWO            my-vol-class   7h31m   Filesystem\r\n\r\nroot@ansible-tower:~# ls \/tmp\/k8s-vol\/\r\nbase    pg_commit_ts  pg_hba.conf    pg_logical    pg_notify    pg_serial     pg_stat      pg_subtrans  pg_twophase  pg_wal   postgresql.auto.conf  postmaster.opts  test.txt\r\nglobal  pg_dynshmem   pg_ident.conf  pg_multixact  pg_replslot  pg_snapshots  pg_stat_tmp  pg_tblspc    PG_VERSION   pg_xact  postgresql.conf       postmaster.pid\r\n<\/code><\/pre>\n
\u4f7f\u7528\u76f8\u540c\u7684 ymal \u91cd\u65b0\u90e8\u7f72 pod\u3002<\/p>\n
root@ansible-tower:~\/yaml# kubectl get pod,pv,pvc -o wide\r\nNAME             READY   STATUS    RESTARTS   AGE   IP            NODE            NOMINATED NODE   READINESS GATES\r\npod\/postgres01   1\/1     Running   0          21s   10.1.108.10   ansible-tower   <none>           <none>\r\n\r\nNAME                      CAPACITY   ACCESS MODES   RECLAIM POLICY   STATUS   CLAIM                  STORAGECLASS   REASON   AGE     VOLUMEMODE\r\npersistentvolume\/my-vol   5Gi        RWO            Delete           Bound    default\/pvc01-my-vol   my-vol-class            7h33m   Filesystem\r\n\r\nNAME                                 STATUS   VOLUME   CAPACITY   ACCESS MODES   STORAGECLASS   AGE     VOLUMEMODE\r\npersistentvolumeclaim\/pvc01-my-vol   Bound    my-vol   5Gi        RWO            my-vol-class   7h33m   Filesystem\r\n<\/code><\/pre>\n
\u6211\u4f1a\u68c0\u67e5\u91cd\u65b0\u90e8\u7f72\u7684pod\u4e2d\u7684\/var\/lib\/postgresql\/data\u6587\u4ef6\u5939\uff0c\u5e76\u786e\u8ba4\u662f\u5426\u5b58\u5728text.txt\u3002
\n\u4ece\u4e0b\u9762\u7684\u65e5\u5fd7\u4e2d\uff0c\u6211\u53ef\u4ee5\u770b\u51fa\u5b83\u662f\u53ef\u4ee5\u91cd\u65b0\u4f7f\u7528\u7684\u3002<\/p>\n
root@ansible-tower:~\/yaml# kubectl exec -it postgres01 -- \/bin\/bash\r\nroot@postgres01:\/# cd \/var\/lib\/postgresql\/data\/\r\nroot@postgres01:\/var\/lib\/postgresql\/data# ls\r\nbase    pg_commit_ts  pg_hba.conf    pg_logical    pg_notify    pg_serial     pg_stat      pg_subtrans  pg_twophase  pg_wal   postgresql.auto.conf  postmaster.opts  test.txt\r\nglobal  pg_dynshmem   pg_ident.conf  pg_multixact  pg_replslot  pg_snapshots  pg_stat_tmp  pg_tblspc    PG_VERSION   pg_xact  postgresql.conf       postmaster.pid\r\n<\/code><\/pre>\n
\u5220\u9664pod\u548cPVC\u3002\u7531\u4e8e\u5728\u521b\u5efaPV\u65f6\u6307\u5b9a\u4e86Delete\u64cd\u4f5c\uff0c\u6240\u4ee5\u5e94\u5f53\u540c\u65f6\u5220\u9664PVC\u65f6\u4e5f\u4f1a\u5220\u9664PV\u3002
\n\u4eceget\u547d\u4ee4\u6ca1\u6709\u4efb\u4f55\u8f93\u51fa\u6765\u770b\uff0c\u53ef\u4ee5\u786e\u8ba4PVC\u548cPV\u5df2\u7ecf\u88ab\u540c\u65f6\u5220\u9664\u3002<\/p>\n
root@ansible-tower:~# kubectl delete pod postgres0\r\npersistentvolumeclaim \"pvc01-my-vol\" deleted\r\n\r\nroot@ansible-tower:~# kubectl get pod,pv,pvc\r\nNo resources found\r\n<\/code><\/pre>\n
\/tmp\u6587\u4ef6\u5939\u4e0b\u7684\u5185\u5bb9\u4e5f\u88ab\u5220\u9664\u4e86\u3002<\/p>\n
root@ansible-tower:~# cd \/tmp\r\nroot@ansible-tower:\/tmp# ls\r\nsnap-private-tmp                                                                systemd-private-7b30335e5c3847888ee14c9d4ae96fea-systemd-resolved.service-y1Y1GA\r\nsystemd-private-7b30335e5c3847888ee14c9d4ae96fea-fwupd.service-Srke4w           systemd-private-7b30335e5c3847888ee14c9d4ae96fea-systemd-timesyncd.service-Mr4GTU\r\nsystemd-private-7b30335e5c3847888ee14c9d4ae96fea-ModemManager.service-9JtOcV    systemd-private-7b30335e5c3847888ee14c9d4ae96fea-upower.service-LLEENP\r\nsystemd-private-7b30335e5c3847888ee14c9d4ae96fea-systemd-logind.service-f83oWV\r\n<\/code><\/pre>\n
\u9a8c\u8bc1\uff1a\u5c1d\u8bd5\u4f7f\u7528”\u4fdd\u7559”\u4f5c\u4e3aspec.persistentVolumeReclaimPolicy\u5728PV\u548cPVC\u7684\u90e8\u7f72\u4ee5\u53ca\u4f7f\u7528\u3002<\/h1>\n
\u4ee5\u4e0b\u662fPV\u7684yaml<\/p>\n
apiVersion<\/span>:<\/span> v1<\/span>\r\nkind<\/span>:<\/span> PersistentVolume<\/span>\r\nmetadata<\/span>:<\/span>\r\n  name<\/span>:<\/span> my-vol-retain<\/span>\r\nspec<\/span>:<\/span>\r\n  capacity<\/span>:<\/span>\r\n    storage<\/span>:<\/span> 5Gi<\/span>\r\n  accessModes<\/span>:<\/span>\r\n  -<\/span> ReadWriteOnce<\/span>\r\n  persistentVolumeReclaimPolicy<\/span>:<\/span> Retain<\/span>\r\n  storageClassName<\/span>:<\/span> my-vol-retain-class<\/span>\r\n  hostPath<\/span>:<\/span>\r\n    path<\/span>:<\/span> \/tmp\/my-vol-retain<\/span>\r\n    type<\/span>:<\/span> DirectoryOrCreate<\/span>\r\n<\/code><\/pre>\n
\u8fdb\u884c\u90e8\u7f72<\/p>\n
root@ansible-tower:~\/yaml# kubectl create -f my-vol-retain.yaml\r\npersistentvolume\/my-vol-retain created\r\n\r\nroot@ansible-tower:~\/yaml# kubectl get pv\r\nNAME            CAPACITY   ACCESS MODES   RECLAIM POLICY   STATUS      CLAIM   STORAGECLASS          REASON   AGE\r\nmy-vol-retain   5Gi        RWO            Retain           Available           my-vol-retain-class            6s\r\n<\/code><\/pre>\n
PVC\u7684yaml\u5982\u4e0b\u6240\u793a<\/p>\n
apiVersion<\/span>:<\/span> v1<\/span>\r\nkind<\/span>:<\/span> PersistentVolumeClaim<\/span>\r\nmetadata<\/span>:<\/span>\r\n  name<\/span>:<\/span> pvc01-my-vol-retain<\/span>\r\nspec<\/span>:<\/span>\r\n  resources<\/span>:<\/span>\r\n    requests<\/span>:<\/span>\r\n      storage<\/span>:<\/span> 5Gi<\/span>\r\n  accessModes<\/span>:<\/span>\r\n  -<\/span> ReadWriteOnce<\/span>\r\n  storageClassName<\/span>:<\/span> my-vol-retain-class<\/span>\r\n<\/code><\/pre>\n
\u90e8\u7f72<\/p>\n
root@ansible-tower:~\/yaml# kubectl create -f pvc01-my-vol-retain.yaml\r\npersistentvolumeclaim\/pvc01-my-vol-retain created\r\n\r\nroot@ansible-tower:~\/yaml# kubectl get pv,pvc -o wide\r\nNAME                             CAPACITY   ACCESS MODES   RECLAIM POLICY   STATUS   CLAIM                         STORAGECLASS          REASON   AGE   VOLUMEMODE\r\npersistentvolume\/my-vol-retain   5Gi        RWO            Retain           Bound    default\/pvc01-my-vol-retain   my-vol-retain-class            68s   Filesystem\r\n\r\nNAME                                        STATUS   VOLUME          CAPACITY   ACCESS MODES   STORAGECLASS          AGE   VOLUMEMODE\r\npersistentvolumeclaim\/pvc01-my-vol-retain   Bound    my-vol-retain   5Gi        RWO            my-vol-retain-class   10s   Filesystem\r\n<\/code><\/pre>\n
pod\u7684yaml\u5185\u5bb9\u5982\u4e0b<\/p>\n
apiVersion<\/span>:<\/span> v1<\/span>\r\nkind<\/span>:<\/span> Pod<\/span>\r\nmetadata<\/span>:<\/span>\r\n  name<\/span>:<\/span> postgres01<\/span>\r\nspec<\/span>:<\/span>\r\n  containers<\/span>:<\/span>\r\n  -<\/span> name<\/span>:<\/span> postgres01<\/span>\r\n    image<\/span>:<\/span> postgres:latest<\/span>\r\n    env<\/span>:<\/span>\r\n    -<\/span> name<\/span>:<\/span> POSTGRES_PASSWORD<\/span>\r\n      value<\/span>:<\/span> \"<\/span>postgres\"<\/span>\r\n    volumeMounts<\/span>:<\/span>\r\n    -<\/span> mountPath<\/span>:<\/span> \/var\/lib\/postgresql\/data<\/span>\r\n      name<\/span>:<\/span> pvc01-my-vol-retain<\/span>\r\n  volumes<\/span>:<\/span>\r\n  -<\/span> name<\/span>:<\/span> pvc01-my-vol-retain<\/span>\r\n    persistentVolumeClaim<\/span>:<\/span>\r\n      claimName<\/span>:<\/span> pvc01-my-vol-retain<\/span>\r\n<\/code><\/pre>\n
\u90e8\u7f72\u4e2d<\/p>\n
root@ansible-tower:~\/yaml# kubectl create -f vol-retain-postgresql01.yaml\r\npod\/postgres01 created\r\n\r\nroot@ansible-tower:~\/yaml# kubectl get pod,pv,pvc -o wide\r\nNAME             READY   STATUS    RESTARTS   AGE   IP            NODE            NOMINATED NODE   READINESS GATES\r\npod\/postgres01   1\/1     Running   0          24s   10.1.108.11   ansible-tower   <none>           <none>\r\n\r\nNAME                             CAPACITY   ACCESS MODES   RECLAIM POLICY   STATUS   CLAIM                         STORAGECLASS          REASON   AGE     VOLUMEMODE\r\npersistentvolume\/my-vol-retain   5Gi        RWO            Retain           Bound    default\/pvc01-my-vol-retain   my-vol-retain-class            5m12s   Filesystem\r\n\r\nNAME                                        STATUS   VOLUME          CAPACITY   ACCESS MODES   STORAGECLASS          AGE     VOLUMEMODE\r\npersistentvolumeclaim\/pvc01-my-vol-retain   Bound    my-vol-retain   5Gi        RWO            my-vol-retain-class   4m14s   Filesystem\r\n<\/code><\/pre>\n
\u5728pod\u4e2d\u521b\u5efa\u4e00\u4e2a\u540d\u4e3atest.txt\u7684\u6587\u4ef6\uff0c\u5e76\u5c06\u5176\u653e\u7f6e\u5728\/var\/lib\/postgresql\/data\u76ee\u5f55\u4e0b\u3002<\/p>\n
root@ansible-tower:~\/yaml# kubectl exec -it postgres01 -- \/bin\/bash\r\nroot@postgres01:\/# cd \/var\/lib\/postgresql\/data\/\r\nroot@postgres01:\/var\/lib\/postgresql\/data# touch test.txt\r\nroot@postgres01:\/var\/lib\/postgresql\/data# ls\r\nbase    pg_commit_ts  pg_hba.conf    pg_logical    pg_notify    pg_serial     pg_stat      pg_subtrans  pg_twophase  pg_wal   postgresql.auto.conf  postmaster.opts  test.txt\r\nglobal  pg_dynshmem   pg_ident.conf  pg_multixact  pg_replslot  pg_snapshots  pg_stat_tmp  pg_tblspc    PG_VERSION   pg_xact  postgresql.conf       postmaster.pid\r\n<\/code><\/pre>\n
\u786e\u8ba4\u4e3b\u673a\u4e0a\u7684\/tmp\/my-vol-retain\u76ee\u5f55\u4e2d\u5b58\u5728\u6570\u636e\u3002<\/p>\n
root@ansible-tower:~# cd \/tmp\/my-vol-retain\/\r\nroot@ansible-tower:\/tmp\/my-vol-retain# ls\r\nbase    pg_commit_ts  pg_hba.conf    pg_logical    pg_notify    pg_serial     pg_stat      pg_subtrans  pg_twophase  pg_wal   postgresql.auto.conf  postmaster.opts  test.txt\r\nglobal  pg_dynshmem   pg_ident.conf  pg_multixact  pg_replslot  pg_snapshots  pg_stat_tmp  pg_tblspc    PG_VERSION   pg_xact  postgresql.conf       postmaster.pid\r\n<\/code><\/pre>\n
\u6211\u4eec\u5c06\u786e\u8ba4\u5373\u4f7f\u5220\u9664\u4e86pod\u548cPVC\uff0c\u5b83\u4eec\u4e5f\u4e0d\u4f1a\u81ea\u52a8\u5220\u9664\u3002<\/p>\n
root@ansible-tower:~\/yaml# kubectl get pod,pv,pvc -o wide\r\nNAME             READY   STATUS    RESTARTS   AGE     IP            NODE            NOMINATED NODE   READINESS GATES\r\npod\/postgres01   1\/1     Running   0          3m22s   10.1.108.11   ansible-tower   <none>           <none>\r\n\r\nNAME                             CAPACITY   ACCESS MODES   RECLAIM POLICY   STATUS   CLAIM                         STORAGECLASS          REASON   AGE     VOLUMEMODE\r\npersistentvolume\/my-vol-retain   5Gi        RWO            Retain           Bound    default\/pvc01-my-vol-retain   my-vol-retain-class            8m10s   Filesystem\r\n\r\nNAME                                        STATUS   VOLUME          CAPACITY   ACCESS MODES   STORAGECLASS          AGE     VOLUMEMODE\r\npersistentvolumeclaim\/pvc01-my-vol-retain   Bound    my-vol-retain   5Gi        RWO            my-vol-retain-class   7m12s   Filesystem\r\n\r\nroot@ansible-tower:~\/yaml# kubectl delete pod postgres01\r\npod \"postgres01\" deleted\r\nroot@ansible-tower:~\/yaml# kubectl delete pvc pvc01-my-vol-retain\r\n<\/code><\/pre>\n
\u53ef\u4ee5\u786e\u8ba4\u8fd8\u6709\u5269\u4f59\u5149\u4f0f\u7535\u91cf\uff0c\u5e76\u4e14\u4ece\u4e3b\u673a\u4e0a\u4e5f\u786e\u8ba4\u8fd8\u7559\u6709\u6570\u636e\u3002<\/p>\n
root@ansible-tower:~\/yaml# kubectl get pod,pv,pvc -o wide\r\nNAME                             CAPACITY   ACCESS MODES   RECLAIM POLICY   STATUS     CLAIM                         STORAGECLASS          REASON   AGE   VOLUMEMODE\r\npersistentvolume\/my-vol-retain   5Gi        RWO            Retain           Released   default\/pvc01-my-vol-retain   my-vol-retain-class            25m   Filesystem\r\n\r\nroot@ansible-tower:~\/yaml# cd \/tmp\/my-vol-retain\/\r\nroot@ansible-tower:\/tmp\/my-vol-retain# ls\r\nbase    pg_commit_ts  pg_hba.conf    pg_logical    pg_notify    pg_serial     pg_stat      pg_subtrans  pg_twophase  pg_wal   postgresql.auto.conf  postmaster.opts  test.txt\r\nglobal  pg_dynshmem   pg_ident.conf  pg_multixact  pg_replslot  pg_snapshots  pg_stat_tmp  pg_tblspc    PG_VERSION   pg_xact  postgresql.conf       postmaster.pid\r\n<\/code><\/pre>\n
\u8981\u518d\u5229\u7528\u8fd9\u4e2a\u53ef\u80fd\u9700\u8981\u82b1\u4e00\u70b9\u529f\u592b\u5462\u3002<\/p>\n
1. \u5220\u9664 PersistentVolume\u3002\u5220\u9664 PV \u540e\uff0c\u4e0e\u5916\u90e8\u57fa\u7840\u8bbe\u65bd\uff08\u5982 AWS EBS\u3001GCE PD\u3001Azure Disk\u3001Cinder \u7b49\uff09\u5173\u8054\u7684\u5b58\u50a8\u7ec4\u4ef6\u4ecd\u7136\u5b58\u5728\u3002
\n2. \u624b\u52a8\u6e05\u7406\u4e0e\u5b58\u50a8\u7ec4\u4ef6\u76f8\u5173\u7684\u6570\u636e\u3002
\n3. \u5982\u679c\u8981\u624b\u52a8\u5220\u9664\u76f8\u5173\u5b58\u50a8\u7ec4\u4ef6\u6216\u8005\u5e0c\u671b\u91cd\u65b0\u4f7f\u7528\u76f8\u540c\u7684\u5b58\u50a8\u7ec4\u4ef6\uff0c\u5219\u9700\u521b\u5efa\u65b0\u7684 PersistentVolume \u5b9a\u4e49\u4e0e\u5176\u4e00\u8d77\u4f7f\u7528\u3002<\/p><\/blockquote>\n
 <\/p>\n","protected":false},"excerpt":{"rendered":"
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