{"id":1629,"date":"2020-06-21T20:40:04","date_gmt":"2020-06-21T12:40:04","guid":{"rendered":"http:\/\/39.97.231.10\/?p=1629"},"modified":"2020-06-21T20:40:04","modified_gmt":"2020-06-21T12:40:04","slug":"statefulset-%e5%9f%ba%e7%a1%80","status":"publish","type":"post","link":"http:\/\/www.weijing.co\/?p=1629","title":{"rendered":"StatefulSet \u57fa\u7840"},"content":{"rendered":"<h1>StatefulSet \u57fa\u7840<\/h1>\n<p>\u4f7f\u7528 <a href=\\\"https:\/\/kubernetes.io\/zh\/docs\/concepts\/abstractions\/controllers\/statefulsets\/\\\">StatefulSets<\/a> \u6765\u7ba1\u7406\u5e94\u7528\u3002\u5982\u4f55\u521b\u5efa\u3001\u5220\u9664\u3001\u6269\u5bb9\/\u7f29\u5bb9\u548c\u66f4\u65b0 StatefulSets \u7684 Pods\u3002<\/p>\n<h2 id=\\\"\u51c6\u5907\u5f00\u59cb\\\">\u51c6\u5907\u5f00\u59cb<\/h2>\n<p>\u5728\u5f00\u59cb\u672c\u6559\u7a0b\u4e4b\u524d\uff0c\u4f60\u5e94\u8be5\u719f\u6089\u4ee5\u4e0b Kubernetes \u7684\u6982\u5ff5\uff1a<\/p>\n<ul>\n<li><a href=\\\"https:\/\/kubernetes.io\/zh\/docs\/user-guide\/pods\/single-container\/\\\">Pods<\/a><\/li>\n<li><a href=\\\"https:\/\/kubernetes.io\/zh\/docs\/concepts\/services-networking\/dns-pod-service\/\\\">Cluster DNS<\/a><\/li>\n<li><a href=\\\"https:\/\/kubernetes.io\/zh\/docs\/concepts\/services-networking\/service\/#headless-services\\\">Headless Services<\/a><\/li>\n<li><a href=\\\"https:\/\/kubernetes.io\/zh\/docs\/concepts\/storage\/persistent-volumes\/\\\">PersistentVolumes<\/a><\/li>\n<li><a href=\\\"https:\/\/github.com\/kubernetes\/examples\/tree\/master\/staging\/persistent-volume-provisioning\/\\\">PersistentVolume Provisioning<\/a><\/li>\n<li><a href=\\\"https:\/\/kubernetes.io\/zh\/docs\/concepts\/workloads\/controllers\/statefulset\/\\\">StatefulSets<\/a><\/li>\n<li><a href=\\\"https:\/\/kubernetes.io\/zh\/docs\/user-guide\/kubectl\/\\\">kubectl CLI<\/a><\/li>\n<\/ul>\n<p>\u672c\u6559\u7a0b\u5047\u8bbe\u4f60\u7684\u96c6\u7fa4\u88ab\u914d\u7f6e\u4e3a\u52a8\u6001\u7684\u63d0\u4f9b PersistentVolumes\u3002\u5982\u679c\u6ca1\u6709\u8fd9\u6837\u914d\u7f6e\uff0c\u5728\u5f00\u59cb\u672c\u6559\u7a0b\u4e4b\u524d\uff0c\u4f60\u9700\u8981\u624b\u52a8\u51c6\u5907 2 \u4e2a 1 GiB \u7684\u5b58\u50a8\u5377\u3002<\/p>\n<h2 id=\\\"\u6559\u7a0b\u76ee\u6807\\\">\u76ee\u6807<\/h2>\n<p>StatefulSets \u65e8\u5728\u4e0e\u6709\u72b6\u6001\u7684\u5e94\u7528\u53ca\u5206\u5e03\u5f0f\u7cfb\u7edf\u4e00\u8d77\u4f7f\u7528\u3002\u7136\u800c\u5728 Kubernetes \u4e0a\u7ba1\u7406\u6709\u72b6\u6001\u5e94\u7528\u548c\u5206\u5e03\u5f0f\u7cfb\u7edf\u662f\u4e00\u4e2a\u5bbd\u6cdb\u800c\u590d\u6742\u7684\u8bdd\u9898\u3002\u4e3a\u4e86\u6f14\u793a StatefulSet \u7684\u57fa\u672c\u7279\u6027\uff0c\u5e76\u4e14\u4e0d\u4f7f\u524d\u540e\u7684\u4e3b\u9898\u6df7\u6dc6\uff0c\u4f60\u5c06\u4f1a\u4f7f\u7528 StatefulSet \u90e8\u7f72\u4e00\u4e2a\u7b80\u5355\u7684 web \u5e94\u7528\u3002<br \/>\n\u5728\u9605\u8bfb\u672c\u6559\u7a0b\u540e\uff0c\u4f60\u5c06\u719f\u6089\u4ee5\u4e0b\u5185\u5bb9\uff1a<\/p>\n<ul>\n<li>\u5982\u4f55\u521b\u5efa StatefulSet<\/li>\n<li>StatefulSet \u600e\u6837\u7ba1\u7406\u5b83\u7684 Pods<\/li>\n<li>\u5982\u4f55\u5220\u9664 StatefulSet<\/li>\n<li>\u5982\u4f55\u5bf9 StatefulSet \u8fdb\u884c\u6269\u5bb9\/\u7f29\u5bb9<\/li>\n<li>\u5982\u4f55\u66f4\u65b0\u4e00\u4e2a StatefulSet \u7684 Pods<\/li>\n<\/ul>\n<h2 id=\\\"\u521b\u5efa-statefulset\\\">\u521b\u5efa StatefulSet<\/h2>\n<p>\u4f5c\u4e3a\u5f00\u59cb\uff0c\u4f7f\u7528\u5982\u4e0b\u793a\u4f8b\u521b\u5efa\u4e00\u4e2a StatefulSet\u3002\u5b83\u548c\u00a0<a href=\\\"https:\/\/kubernetes.io\/zh\/docs\/concepts\/abstractions\/controllers\/statefulsets\/\\\">StatefulSets<\/a>\u00a0\u6982\u5ff5\u4e2d\u7684\u793a\u4f8b\u76f8\u4f3c\u3002\u5b83\u521b\u5efa\u4e86\u4e00\u4e2a\u00a0<a href=\\\"https:\/\/kubernetes.io\/zh\/docs\/user-guide\/services\/#headless-services\\\">Headless Service<\/a>\u00a0nginx\u00a0\u7528\u6765\u53d1\u5e03 StatefulSet\u00a0web\u00a0\u4e2d\u7684 Pod \u7684 IP \u5730\u5740\u3002<\/p>\n<table id=\\\"application-web-web-yaml\\\">\n<thead>\n<tr>\n<th><a href=\\\"https:\/\/raw.githubusercontent.com\/kubernetes\/website\/master\/content\/zh\/examples\/application\/web\/web.yaml\\\" download=\\\"application\/web\/web.yaml\\\">application\/web\/web.yaml<\/a>\u00a0<img title=\\\"Copy application\/web\/web.yaml to clipboard\\\" src=\\\"https:\/\/d33wubrfki0l68.cloudfront.net\/951ae1fcc65e28202164b32c13fa7ae04fab4a0b\/b77dc\/images\/copycode.svg\\\" \/><\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>\n<div>\n<pre>apiVersion: v1\nkind: Service\nmetadata:\n  name: nginx\n  labels:\n    app: nginx\nspec:\n  ports:\n  - port: 80\n    name: web\n  clusterIP: None\n  selector:\n    app: nginx\n---\napiVersion: apps\/v1\nkind: StatefulSet\nmetadata:\n  name: web\nspec:\n  serviceName: \\\"nginx\\\"\n  replicas: 2\n  selector:\n    matchLabels:\n      app: nginx\n  template:\n    metadata:\n      labels:\n        app: nginx\n    spec:\n      containers:\n      - name: nginx\n        image: k8s.gcr.io\/nginx-slim:0.8\n        ports:\n        - containerPort: 80\n          name: web\n        volumeMounts:\n        - name: www\n          mountPath: \/usr\/share\/nginx\/html\n  volumeClaimTemplates:\n  - metadata:\n      name: www\n    spec:\n      accessModes: [ \\\"ReadWriteOnce\\\" ]\n      resources:\n        requests:\n          storage: 1Gi\n<\/pre>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u4e0b\u8f7d\u4e0a\u9762\u7684\u4f8b\u5b50\u5e76\u4fdd\u5b58\u4e3a\u6587\u4ef6\u00a0web.yaml\u3002<br \/>\n\u4f60\u9700\u8981\u4f7f\u7528\u4e24\u4e2a\u7ec8\u7aef\u7a97\u53e3\u3002\u5728\u7b2c\u4e00\u4e2a\u7ec8\u7aef\u4e2d\uff0c\u4f7f\u7528\u00a0<a href=\\\"https:\/\/kubernetes.io\/zh\/docs\/user-guide\/kubectl\/v1.18\/#get\\\">kubectl get<\/a>\u00a0\u6765\u67e5\u770b StatefulSet \u7684 Pods \u7684\u521b\u5efa\u60c5\u51b5\u3002<\/p>\n<div>\n<pre>kubectl get pods -w -l app=nginx\n<\/pre>\n<\/div>\n<p>\u5728\u53e6\u4e00\u4e2a\u7ec8\u7aef\u4e2d\uff0c\u4f7f\u7528\u00a0<a href=\\\"https:\/\/kubernetes.io\/zh\/docs\/reference\/generated\/kubectl\/kubectl-commands\/#apply\\\">kubectl apply<\/a>\u6765\u521b\u5efa\u5b9a\u4e49\u5728\u00a0web.yaml\u00a0\u4e2d\u7684 Headless Service \u548c StatefulSet\u3002<\/p>\n<div>\n<pre>kubectl apply -f web.yaml\nservice\/nginx created\nstatefulset.apps\/web created\n<\/pre>\n<\/div>\n<p>\u4e0a\u9762\u7684\u547d\u4ee4\u521b\u5efa\u4e86\u4e24\u4e2a Pod\uff0c\u6bcf\u4e2a\u90fd\u8fd0\u884c\u4e86\u4e00\u4e2a\u00a0<a href=\\\"https:\/\/www.nginx.com\/\\\">NGINX<\/a>\u00a0web \u670d\u52a1\u5668\u3002\u83b7\u53d6\u00a0nginx\u00a0Service \u548c\u00a0web\u00a0StatefulSet \u6765\u9a8c\u8bc1\u662f\u5426\u6210\u529f\u7684\u521b\u5efa\u4e86\u5b83\u4eec\u3002<\/p>\n<div>\n<pre>kubectl get service nginx\nNAME      TYPE         CLUSTER-IP   EXTERNAL-IP   PORT(S)   AGE\nnginx     ClusterIP    None         &lt;none&gt;        80\/TCP    12s\nkubectl get statefulset web\nNAME      DESIRED   CURRENT   AGE\nweb       2         1         20s\n<\/pre>\n<\/div>\n<h3 id=\\\"\u987a\u5e8f\u521b\u5efa-pod\\\">\u987a\u5e8f\u521b\u5efa Pod<\/h3>\n<p>\u5bf9\u4e8e\u4e00\u4e2a\u62e5\u6709 N \u4e2a\u526f\u672c\u7684 StatefulSet\uff0cPod \u88ab\u90e8\u7f72\u65f6\u662f\u6309\u7167 {0 \u2026\u2026 N-1} \u7684\u5e8f\u53f7\u987a\u5e8f\u521b\u5efa\u7684\u3002\u5728\u7b2c\u4e00\u4e2a\u7ec8\u7aef\u4e2d\u4f7f\u7528\u00a0kubectl get\u00a0\u68c0\u67e5\u8f93\u51fa\u3002\u8fd9\u4e2a\u8f93\u51fa\u6700\u7ec8\u5c06\u770b\u8d77\u6765\u50cf\u4e0b\u9762\u7684\u6837\u5b50\u3002<\/p>\n<div>\n<pre>kubectl get pods -w -l app=nginx\nNAME      READY     STATUS    RESTARTS   AGE\nweb-0     0\/1       Pending   0          0s\nweb-0     0\/1       Pending   0         0s\nweb-0     0\/1       ContainerCreating   0         0s\nweb-0     1\/1       Running   0         19s\nweb-1     0\/1       Pending   0         0s\nweb-1     0\/1       Pending   0         0s\nweb-1     0\/1       ContainerCreating   0         0s\nweb-1     1\/1       Running   0         18s\n<\/pre>\n<\/div>\n<p>\u8bf7\u6ce8\u610f\u5728\u00a0web-0\u00a0Pod \u5904\u4e8e\u00a0<a href=\\\"https:\/\/kubernetes.io\/zh\/docs\/user-guide\/pod-states\\\">Running\u548cReady<\/a>\u00a0\u72b6\u6001\u540e\u00a0web-1\u00a0Pod \u624d\u4f1a\u88ab\u542f\u52a8\u3002<\/p>\n<h2 id=\\\"statefulset-\u4e2d\u7684-pod\\\">StatefulSet \u4e2d\u7684 Pod<\/h2>\n<p>StatefulSet \u4e2d\u7684 Pod \u62e5\u6709\u4e00\u4e2a\u552f\u4e00\u7684\u987a\u5e8f\u7d22\u5f15\u548c\u7a33\u5b9a\u7684\u7f51\u7edc\u8eab\u4efd\u6807\u8bc6\u3002<\/p>\n<h3 id=\\\"\u68c0\u67e5-pod-\u7684\u987a\u5e8f\u7d22\u5f15\\\">\u68c0\u67e5 Pod \u7684\u987a\u5e8f\u7d22\u5f15<\/h3>\n<p>\u83b7\u53d6 StatefulSet \u7684 Pod\u3002<\/p>\n<div>\n<pre>kubectl get pods -l app=nginx\nNAME      READY     STATUS    RESTARTS   AGE\nweb-0     1\/1       Running   0          1m\nweb-1     1\/1       Running   0          1m\n<\/pre>\n<\/div>\n<p>\u5982\u540c\u00a0<a href=\\\"https:\/\/kubernetes.io\/zh\/docs\/concepts\/abstractions\/controllers\/statefulsets\/\\\">StatefulSets<\/a>\u00a0\u6982\u5ff5\u4e2d\u6240\u63d0\u5230\u7684\uff0cStatefulSet \u4e2d\u7684 Pod \u62e5\u6709\u4e00\u4e2a\u5177\u6709\u9ecf\u6027\u7684\u3001\u72ec\u4e00\u65e0\u4e8c\u7684\u8eab\u4efd\u6807\u5fd7\u3002\u8fd9\u4e2a\u6807\u5fd7\u57fa\u4e8e StatefulSet \u63a7\u5236\u5668\u5206\u914d\u7ed9\u6bcf\u4e2a Pod \u7684\u552f\u4e00\u987a\u5e8f\u7d22\u5f15\u3002Pod \u7684\u540d\u79f0\u7684\u5f62\u5f0f\u4e3a&lt;statefulset name&gt;-&lt;ordinal index&gt;\u3002webStatefulSet \u62e5\u6709\u4e24\u4e2a\u526f\u672c\uff0c\u6240\u4ee5\u5b83\u521b\u5efa\u4e86\u4e24\u4e2a Pod\uff1aweb-0\u548cweb-1\u3002<\/p>\n<h3 id=\\\"\u4f7f\u7528\u7a33\u5b9a\u7684\u7f51\u7edc\u8eab\u4efd\u6807\u8bc6\\\">\u4f7f\u7528\u7a33\u5b9a\u7684\u7f51\u7edc\u8eab\u4efd\u6807\u8bc6<\/h3>\n<p>\u6bcf\u4e2a Pod \u90fd\u62e5\u6709\u4e00\u4e2a\u57fa\u4e8e\u5176\u987a\u5e8f\u7d22\u5f15\u7684\u7a33\u5b9a\u7684\u4e3b\u673a\u540d\u3002\u4f7f\u7528<a href=\\\"https:\/\/kubernetes.io\/zh\/docs\/reference\/generated\/kubectl\/kubectl-commands\/#exec\\\">kubectl exec<\/a>\u5728\u6bcf\u4e2a Pod \u4e2d\u6267\u884chostname\u3002<\/p>\n<div>\n<pre>for i in 0 1; do kubectl exec web-$i -- sh -c \\'hostname\\'; done\nweb-0\nweb-1\n<\/pre>\n<\/div>\n<p>\u4f7f\u7528\u00a0<a href=\\\"https:\/\/kubernetes.io\/zh\/docs\/reference\/generated\/kubectl\/kubectl-commands\/#run\\\">kubectl run<\/a>\u00a0\u8fd0\u884c\u4e00\u4e2a\u63d0\u4f9b\u00a0nslookup\u00a0\u547d\u4ee4\u7684\u5bb9\u5668\uff0c\u8be5\u547d\u4ee4\u6765\u81ea\u4e8e\u00a0dnsutils\u00a0\u5305\u3002\u901a\u8fc7\u5bf9 Pod \u7684\u4e3b\u673a\u540d\u6267\u884c\u00a0nslookup\uff0c\u4f60\u53ef\u4ee5\u68c0\u67e5\u4ed6\u4eec\u5728\u96c6\u7fa4\u5185\u90e8\u7684 DNS \u5730\u5740\u3002<\/p>\n<div>\n<pre>kubectl run -i --tty --image busybox:1.28 dns-test --restart=Never --rm\nnslookup web-0.nginx\nServer:    10.0.0.10\nAddress 1: 10.0.0.10 kube-dns.kube-system.svc.cluster.local\nName:      web-0.nginx\nAddress 1: 10.244.1.6\nnslookup web-1.nginx\nServer:    10.0.0.10\nAddress 1: 10.0.0.10 kube-dns.kube-system.svc.cluster.local\nName:      web-1.nginx\nAddress 1: 10.244.2.6\n<\/pre>\n<\/div>\n<p>headless service \u7684 CNAME \u6307\u5411 SRV \u8bb0\u5f55\uff08\u8bb0\u5f55\u6bcf\u4e2a Running \u548c Ready \u72b6\u6001\u7684 Pod\uff09\u3002SRV \u8bb0\u5f55\u6307\u5411\u4e00\u4e2a\u5305\u542b Pod IP \u5730\u5740\u7684\u8bb0\u5f55\u8868\u9879\u3002<br \/>\n\u5728\u4e00\u4e2a\u7ec8\u7aef\u4e2d\u67e5\u770b StatefulSet \u7684 Pod\u3002<\/p>\n<div>\n<pre>kubectl get pod -w -l app=nginx\n<\/pre>\n<\/div>\n<p>\u5728\u53e6\u4e00\u4e2a\u7ec8\u7aef\u4e2d\u4f7f\u7528\u00a0<a href=\\\"https:\/\/kubernetes.io\/zh\/docs\/reference\/generated\/kubectl\/kubectl-commands\/#delete\\\">kubectl delete<\/a>\u00a0\u5220\u9664 StatefulSet \u4e2d\u6240\u6709\u7684 Pod\u3002<\/p>\n<div>\n<pre>kubectl delete pod -l app=nginx\npod \\\"web-0\\\" deleted\npod \\\"web-1\\\" deleted\n<\/pre>\n<\/div>\n<p>\u7b49\u5f85 StatefulSet \u91cd\u542f\u5b83\u4eec\uff0c\u5e76\u4e14\u4e24\u4e2a Pod \u90fd\u53d8\u6210 Running \u548c Ready \u72b6\u6001\u3002<\/p>\n<div>\n<pre>kubectl get pod -w -l app=nginx\nNAME      READY     STATUS              RESTARTS   AGE\nweb-0     0\/1       ContainerCreating   0          0s\nNAME      READY     STATUS    RESTARTS   AGE\nweb-0     1\/1       Running   0          2s\nweb-1     0\/1       Pending   0         0s\nweb-1     0\/1       Pending   0         0s\nweb-1     0\/1       ContainerCreating   0         0s\nweb-1     1\/1       Running   0         34s\n<\/pre>\n<\/div>\n<p>\u4f7f\u7528\u00a0kubectl exec\u00a0\u548c\u00a0kubectl run\u00a0\u67e5\u770b Pod \u7684\u4e3b\u673a\u540d\u548c\u96c6\u7fa4\u5185\u90e8\u7684 DNS \u8868\u9879\u3002<\/p>\n<div>\n<pre>for i in 0 1; do kubectl exec web-$i -- sh -c \\'hostname\\'; done\nweb-0\nweb-1\nkubectl run -i --tty --image busybox:1.28 dns-test --restart=Never --rm \/bin\/sh\nnslookup web-0.nginx\nServer:    10.0.0.10\nAddress 1: 10.0.0.10 kube-dns.kube-system.svc.cluster.local\nName:      web-0.nginx\nAddress 1: 10.244.1.7\nnslookup web-1.nginx\nServer:    10.0.0.10\nAddress 1: 10.0.0.10 kube-dns.kube-system.svc.cluster.local\nName:      web-1.nginx\nAddress 1: 10.244.2.8\n<\/pre>\n<\/div>\n<p>Pod \u7684\u5e8f\u53f7\u3001\u4e3b\u673a\u540d\u3001SRV \u6761\u76ee\u548c\u8bb0\u5f55\u540d\u79f0\u6ca1\u6709\u6539\u53d8\uff0c\u4f46\u548c Pod \u76f8\u5173\u8054\u7684 IP \u5730\u5740\u53ef\u80fd\u53d1\u751f\u4e86\u6539\u53d8\u3002\u5728\u672c\u6559\u7a0b\u4e2d\u4f7f\u7528\u7684\u96c6\u7fa4\u4e2d\u5b83\u4eec\u5c31\u6539\u53d8\u4e86\u3002\u8fd9\u5c31\u662f\u4e3a\u4ec0\u4e48\u4e0d\u8981\u5728\u5176\u4ed6\u5e94\u7528\u4e2d\u4f7f\u7528 StatefulSet \u4e2d\u7684 Pod \u7684 IP \u5730\u5740\u8fdb\u884c\u8fde\u63a5\uff0c\u8fd9\u70b9\u5f88\u91cd\u8981\u3002<br \/>\n\u5982\u679c\u4f60\u9700\u8981\u67e5\u627e\u5e76\u8fde\u63a5\u4e00\u4e2a StatefulSet \u7684\u6d3b\u52a8\u6210\u5458\uff0c\u4f60\u5e94\u8be5\u67e5\u8be2 Headless Service \u7684 CNAME\u3002\u548c CNAME \u76f8\u5173\u8054\u7684 SRV \u8bb0\u5f55\u53ea\u4f1a\u5305\u542b StatefulSet \u4e2d\u5904\u4e8e Running \u548c Ready \u72b6\u6001\u7684 Pod\u3002<br \/>\n\u5982\u679c\u4f60\u7684\u5e94\u7528\u5df2\u7ecf\u5b9e\u73b0\u4e86\u7528\u4e8e\u6d4b\u8bd5 liveness \u548c readiness \u7684\u8fde\u63a5\u903b\u8f91\uff0c\u4f60\u53ef\u4ee5\u4f7f\u7528 Pod \u7684 SRV \u8bb0\u5f55\uff08web-0.nginx.default.svc.cluster.local\uff0c\u00a0web-1.nginx.default.svc.cluster.local\uff09\u3002\u56e0\u4e3a\u4ed6\u4eec\u662f\u7a33\u5b9a\u7684\uff0c\u5e76\u4e14\u5f53\u4f60\u7684 Pod \u7684\u72b6\u6001\u53d8\u4e3a Running \u548c Ready \u65f6\uff0c\u4f60\u7684\u5e94\u7528\u5c31\u80fd\u591f\u53d1\u73b0\u5b83\u4eec\u7684\u5730\u5740\u3002<\/p>\n<h3 id=\\\"\u5199\u5165\u7a33\u5b9a\u7684\u5b58\u50a8\\\">\u5199\u5165\u7a33\u5b9a\u7684\u5b58\u50a8<\/h3>\n<p>\u83b7\u53d6\u00a0web-0\u00a0\u548c\u00a0web-1\u00a0\u7684 PersistentVolumeClaims\u3002<\/p>\n<div>\n<pre>kubectl get pvc -l app=nginx\nNAME        STATUS    VOLUME                                     CAPACITY   ACCESSMODES   AGE\nwww-web-0   Bound     pvc-15c268c7-b507-11e6-932f-42010a800002   1Gi        RWO           48s\nwww-web-1   Bound     pvc-15c79307-b507-11e6-932f-42010a800002   1Gi        RWO           48s\n<\/pre>\n<\/div>\n<p>StatefulSet \u63a7\u5236\u5668\u521b\u5efa\u4e86\u4e24\u4e2a PersistentVolumeClaims\uff0c\u7ed1\u5b9a\u5230\u4e24\u4e2a\u00a0<a href=\\\"https:\/\/kubernetes.io\/zh\/docs\/concepts\/storage\/volumes\/\\\">PersistentVolumes<\/a>\u3002\u7531\u4e8e\u672c\u6559\u7a0b\u4f7f\u7528\u7684\u96c6\u7fa4\u914d\u7f6e\u4e3a\u52a8\u6001\u63d0\u4f9b PersistentVolume\uff0c\u6240\u6709\u7684 PersistentVolume \u90fd\u662f\u81ea\u52a8\u521b\u5efa\u548c\u7ed1\u5b9a\u7684\u3002<br \/>\nNGINX web \u670d\u52a1\u5668\u9ed8\u8ba4\u4f1a\u52a0\u8f7d\u4f4d\u4e8e\u00a0\/usr\/share\/nginx\/html\/index.html\u00a0\u7684 index \u6587\u4ef6\u3002StatefulSets\u00a0spec\u00a0\u4e2d\u7684\u00a0volumeMounts\u00a0\u5b57\u6bb5\u4fdd\u8bc1\u4e86\u00a0\/usr\/share\/nginx\/html\u00a0\u6587\u4ef6\u5939\u7531\u4e00\u4e2a PersistentVolume \u652f\u6301\u3002<br \/>\n\u5c06 Pod \u7684\u4e3b\u673a\u540d\u5199\u5165\u5b83\u4eec\u7684index.html\u6587\u4ef6\u5e76\u9a8c\u8bc1 NGINX web \u670d\u52a1\u5668\u4f7f\u7528\u8be5\u4e3b\u673a\u540d\u63d0\u4f9b\u670d\u52a1\u3002<\/p>\n<div>\n<pre>for i in 0 1; do kubectl exec web-$i -- sh -c \\'echo $(hostname) &gt; \/usr\/share\/nginx\/html\/index.html\\'; done\nfor i in 0 1; do kubectl exec -it web-$i -- curl localhost; done\nweb-0\nweb-1\n<\/pre>\n<\/div>\n<blockquote>\n<div>\u6ce8\u610f\uff1a\u00a0\u8bf7\u6ce8\u610f\uff0c\u5982\u679c\u4f60\u770b\u89c1\u4e0a\u9762\u7684 curl \u547d\u4ee4\u8fd4\u56de\u4e86 403 Forbidden \u7684\u54cd\u5e94\uff0c\u4f60\u9700\u8981\u50cf\u8fd9\u6837\u4fee\u590d\u4f7f\u7528 `volumeMounts`\uff08due to a [bug when using hostPath volumes](https:\/\/github.com\/kubernetes\/kubernetes\/issues\/2630)\uff09\u6302\u8f7d\u7684\u76ee\u5f55\u7684\u6743\u9650\uff1a &#8220;`shell for i in 0 1; do kubectl exec web-$i &#8212; chmod 755 \/usr\/share\/nginx\/html; done &#8220;` \u5728\u4f60\u91cd\u65b0\u5c1d\u8bd5\u4e0a\u9762\u7684 curl \u547d\u4ee4\u4e4b\u524d\u3002<\/div>\n<\/blockquote>\n<p>\u5728\u4e00\u4e2a\u7ec8\u7aef\u67e5\u770b StatefulSet \u7684 Pod\u3002<\/p>\n<div>\n<pre>kubectl get pod -w -l app=nginx\n<\/pre>\n<\/div>\n<p>\u5728\u53e6\u4e00\u4e2a\u7ec8\u7aef\u5220\u9664 StatefulSet \u6240\u6709\u7684 Pod\u3002<\/p>\n<div>\n<pre>kubectl delete pod -l app=nginx\npod \\\"web-0\\\" deleted\npod \\\"web-1\\\" deleted\n<\/pre>\n<\/div>\n<p>\u5728\u7b2c\u4e00\u4e2a\u7ec8\u7aef\u91cc\u68c0\u67e5\u00a0kubectl get\u00a0\u547d\u4ee4\u7684\u8f93\u51fa\uff0c\u7b49\u5f85\u6240\u6709 Pod \u53d8\u6210 Running \u548c Ready \u72b6\u6001\u3002<\/p>\n<div>\n<pre>kubectl get pod -w -l app=nginx\nNAME      READY     STATUS              RESTARTS   AGE\nweb-0     0\/1       ContainerCreating   0          0s\nNAME      READY     STATUS    RESTARTS   AGE\nweb-0     1\/1       Running   0          2s\nweb-1     0\/1       Pending   0         0s\nweb-1     0\/1       Pending   0         0s\nweb-1     0\/1       ContainerCreating   0         0s\nweb-1     1\/1       Running   0         34s\n<\/pre>\n<\/div>\n<p>\u9a8c\u8bc1\u6240\u6709 web \u670d\u52a1\u5668\u5728\u7ee7\u7eed\u4f7f\u7528\u5b83\u4eec\u7684\u4e3b\u673a\u540d\u63d0\u4f9b\u670d\u52a1\u3002<\/p>\n<pre>for i in 0 1; do kubectl exec -it web-$i -- curl localhost; done\nweb-0\nweb-1\n<\/pre>\n<p>\u867d\u7136\u00a0web-0\u00a0\u548c\u00a0web-1\u00a0\u88ab\u91cd\u65b0\u8c03\u5ea6\u4e86\uff0c\u4f46\u5b83\u4eec\u4ecd\u7136\u7ee7\u7eed\u76d1\u542c\u5404\u81ea\u7684\u4e3b\u673a\u540d\uff0c\u56e0\u4e3a\u548c\u5b83\u4eec\u7684 PersistentVolumeClaim \u76f8\u5173\u8054\u7684 PersistentVolume \u88ab\u91cd\u65b0\u6302\u8f7d\u5230\u4e86\u5404\u81ea\u7684\u00a0volumeMount\u00a0\u4e0a\u3002\u4e0d\u7ba1\u00a0web-0\u00a0\u548c\u00a0web-1\u00a0\u88ab\u8c03\u5ea6\u5230\u4e86\u54ea\u4e2a\u8282\u70b9\u4e0a\uff0c\u5b83\u4eec\u7684 PersistentVolumes \u5c06\u4f1a\u88ab\u6302\u8f7d\u5230\u5408\u9002\u7684\u6302\u8f7d\u70b9\u4e0a\u3002<\/p>\n<h2 id=\\\"\u6269\u5bb9-\u7f29\u5bb9-statefulset\\\">\u6269\u5bb9\/\u7f29\u5bb9 StatefulSet<\/h2>\n<p>\u6269\u5bb9\/\u7f29\u5bb9 StatefulSet \u6307\u589e\u52a0\u6216\u51cf\u5c11\u5b83\u7684\u526f\u672c\u6570\u3002\u8fd9\u901a\u8fc7\u66f4\u65b0\u00a0replicas\u00a0\u5b57\u6bb5\u5b8c\u6210\u3002\u4f60\u53ef\u4ee5\u4f7f\u7528<a href=\\\"https:\/\/kubernetes.io\/zh\/docs\/user-guide\/kubectl\/v1.18\/#scale\\\">kubectl scale<\/a>\u00a0\u6216\u8005<a href=\\\"https:\/\/kubernetes.io\/zh\/docs\/user-guide\/kubectl\/v1.18\/#patch\\\">kubectl patch<\/a>\u6765\u6269\u5bb9\/\u7f29\u5bb9\u4e00\u4e2a StatefulSet\u3002<\/p>\n<h3 id=\\\"\u6269\u5bb9\\\">\u6269\u5bb9<\/h3>\n<p>\u5728\u4e00\u4e2a\u7ec8\u7aef\u7a97\u53e3\u89c2\u5bdf StatefulSet \u7684 Pod\u3002<\/p>\n<div>\n<pre>kubectl get pods -w -l app=nginx\n<\/pre>\n<\/div>\n<p>\u5728\u53e6\u4e00\u4e2a\u7ec8\u7aef\u7a97\u53e3\u4f7f\u7528\u00a0kubectl scale\u00a0\u6269\u5c55\u526f\u672c\u6570\u4e3a 5\u3002<\/p>\n<div>\n<pre>kubectl scale sts web --replicas=5\nstatefulset.apps\/web scaled\n<\/pre>\n<\/div>\n<p>\u5728\u7b2c\u4e00\u4e2a \u7ec8\u7aef\u4e2d\u68c0\u67e5\u00a0kubectl get\u00a0\u547d\u4ee4\u7684\u8f93\u51fa\uff0c\u7b49\u5f85\u589e\u52a0\u7684 3 \u4e2a Pod \u7684\u72b6\u6001\u53d8\u4e3a Running \u548c Ready\u3002<\/p>\n<div>\n<pre>kubectl get pods -w -l app=nginx\nNAME      READY     STATUS    RESTARTS   AGE\nweb-0     1\/1       Running   0          2h\nweb-1     1\/1       Running   0          2h\nNAME      READY     STATUS    RESTARTS   AGE\nweb-2     0\/1       Pending   0          0s\nweb-2     0\/1       Pending   0         0s\nweb-2     0\/1       ContainerCreating   0         0s\nweb-2     1\/1       Running   0         19s\nweb-3     0\/1       Pending   0         0s\nweb-3     0\/1       Pending   0         0s\nweb-3     0\/1       ContainerCreating   0         0s\nweb-3     1\/1       Running   0         18s\nweb-4     0\/1       Pending   0         0s\nweb-4     0\/1       Pending   0         0s\nweb-4     0\/1       ContainerCreating   0         0s\nweb-4     1\/1       Running   0         19s\n<\/pre>\n<\/div>\n<p>StatefulSet \u63a7\u5236\u5668\u6269\u5c55\u4e86\u526f\u672c\u7684\u6570\u91cf\u3002\u5982\u540c<a href=\\\"https:\/\/kubernetes.io\/zh\/docs\/tutorials\/stateful-application\/basic-stateful-set\/#%E9%A1%BA%E5%BA%8F%E5%88%9B%E5%BB%BApod\\\">\u521b\u5efa StatefulSet<\/a>\u00a0\u6240\u8ff0\uff0cStatefulSet \u6309\u5e8f\u53f7\u7d22\u5f15\u987a\u5e8f\u7684\u521b\u5efa\u6bcf\u4e2a Pod\uff0c\u5e76\u4e14\u4f1a\u7b49\u5f85\u524d\u4e00\u4e2a Pod \u53d8\u4e3a Running \u548c Ready \u624d\u4f1a\u542f\u52a8\u4e0b\u4e00\u4e2a Pod\u3002<\/p>\n<h3 id=\\\"\u7f29\u5bb9\\\">\u7f29\u5bb9<\/h3>\n<p>\u5728\u4e00\u4e2a\u7ec8\u7aef\u89c2\u5bdf StatefulSet \u7684 Pod\u3002<\/p>\n<div>\n<pre>kubectl get pods -w -l app=nginx\n<\/pre>\n<\/div>\n<p>\u5728\u53e6\u4e00\u4e2a\u7ec8\u7aef\u4f7f\u7528\u00a0kubectl patch\u00a0\u5c06 StatefulSet \u7f29\u5bb9\u56de\u4e09\u4e2a\u526f\u672c\u3002<\/p>\n<div>\n<pre>kubectl patch sts web -p \\'{\\\"spec\\\":{\\\"replicas\\\":3}}\\'\nstatefulset.apps\/web patched\n<\/pre>\n<\/div>\n<p>\u7b49\u5f85\u00a0web-4\u00a0\u548c\u00a0web-3\u00a0\u72b6\u6001\u53d8\u4e3a Terminating\u3002<\/p>\n<pre>kubectl get pods -w -l app=nginx\nNAME      READY     STATUS              RESTARTS   AGE\nweb-0     1\/1       Running             0          3h\nweb-1     1\/1       Running             0          3h\nweb-2     1\/1       Running             0          55s\nweb-3     1\/1       Running             0          36s\nweb-4     0\/1       ContainerCreating   0          18s\nNAME      READY     STATUS    RESTARTS   AGE\nweb-4     1\/1       Running   0          19s\nweb-4     1\/1       Terminating   0         24s\nweb-4     1\/1       Terminating   0         24s\nweb-3     1\/1       Terminating   0         42s\nweb-3     1\/1       Terminating   0         42s\n<\/pre>\n<h3 id=\\\"\u987a\u5e8f\u7ec8\u6b62-pod\\\">\u987a\u5e8f\u7ec8\u6b62 Pod<\/h3>\n<p>\u63a7\u5236\u5668\u4f1a\u6309\u7167\u4e0e Pod \u5e8f\u53f7\u7d22\u5f15\u76f8\u53cd\u7684\u987a\u5e8f\u6bcf\u6b21\u5220\u9664\u4e00\u4e2a Pod\u3002\u5728\u5220\u9664\u4e0b\u4e00\u4e2a Pod \u524d\u4f1a\u7b49\u5f85\u4e0a\u4e00\u4e2a\u88ab\u5b8c\u5168\u5173\u95ed\u3002<br \/>\n\u83b7\u53d6 StatefulSet \u7684 PersistentVolumeClaims\u3002<\/p>\n<div>\n<pre>kubectl get pvc -l app=nginx\nNAME        STATUS    VOLUME                                     CAPACITY   ACCESSMODES   AGE\nwww-web-0   Bound     pvc-15c268c7-b507-11e6-932f-42010a800002   1Gi        RWO           13h\nwww-web-1   Bound     pvc-15c79307-b507-11e6-932f-42010a800002   1Gi        RWO           13h\nwww-web-2   Bound     pvc-e1125b27-b508-11e6-932f-42010a800002   1Gi        RWO           13h\nwww-web-3   Bound     pvc-e1176df6-b508-11e6-932f-42010a800002   1Gi        RWO           13h\nwww-web-4   Bound     pvc-e11bb5f8-b508-11e6-932f-42010a800002   1Gi        RWO           13h\n<\/pre>\n<\/div>\n<p>\u4e94\u4e2a PersistentVolumeClaims \u548c\u4e94\u4e2a PersistentVolumes \u4ecd\u7136\u5b58\u5728\u3002\u67e5\u770b Pod \u7684\u00a0<a href=\\\"https:\/\/kubernetes.io\/zh\/docs\/tutorials\/stateful-application\/basic-stateful-set\/#stable-storage\\\">\u7a33\u5b9a\u5b58\u50a8<\/a>\uff0c\u6211\u4eec\u53d1\u73b0\u5f53\u5220\u9664 StatefulSet \u7684 Pod \u65f6\uff0c\u6302\u8f7d\u5230 StatefulSet \u7684 Pod \u7684 PersistentVolumes \u4e0d\u4f1a\u88ab\u5220\u9664\u3002\u5f53\u8fd9\u79cd\u5220\u9664\u884c\u4e3a\u662f\u7531 StatefulSet \u7f29\u5bb9\u5f15\u8d77\u65f6\u4e5f\u662f\u4e00\u6837\u7684\u3002<\/p>\n<h2 id=\\\"\u66f4\u65b0-statefulset\\\">\u66f4\u65b0 StatefulSet<\/h2>\n<p>Kubernetes 1.7 \u7248\u672c\u7684 StatefulSet \u63a7\u5236\u5668\u652f\u6301\u81ea\u52a8\u66f4\u65b0\u3002\u66f4\u65b0\u7b56\u7565\u7531 StatefulSet API Object \u7684spec.updateStrategy\u00a0\u5b57\u6bb5\u51b3\u5b9a\u3002\u8fd9\u4e2a\u7279\u6027\u80fd\u591f\u7528\u6765\u66f4\u65b0\u4e00\u4e2a StatefulSet \u4e2d\u7684 Pod \u7684 container images\uff0cresource requests\uff0c\u4ee5\u53ca limits\uff0clabels \u548c annotations\u3002RollingUpdate\u6eda\u52a8\u66f4\u65b0\u662f StatefulSets \u9ed8\u8ba4\u7b56\u7565\u3002<\/p>\n<h3 id=\\\"rolling-update-\u7b56\u7565\\\">Rolling Update \u7b56\u7565<\/h3>\n<p>RollingUpdate\u00a0\u66f4\u65b0\u7b56\u7565\u4f1a\u66f4\u65b0\u4e00\u4e2a StatefulSet \u4e2d\u6240\u6709\u7684 Pod\uff0c\u91c7\u7528\u4e0e\u5e8f\u53f7\u7d22\u5f15\u76f8\u53cd\u7684\u987a\u5e8f\u5e76\u9075\u5faa StatefulSet \u7684\u4fdd\u8bc1\u3002<br \/>\nPatch\u00a0web\u00a0StatefulSet \u6765\u6267\u884c\u00a0RollingUpdate\u00a0\u66f4\u65b0\u7b56\u7565\u3002<\/p>\n<div>\n<pre>kubectl patch statefulset web -p \\'{\\\"spec\\\":{\\\"updateStrategy\\\":{\\\"type\\\":\\\"RollingUpdate\\\"}}}\\'\nstatefulset.apps\/web patched\n<\/pre>\n<\/div>\n<p>\u5728\u4e00\u4e2a\u7ec8\u7aef\u7a97\u53e3\u4e2d patch\u00a0web\u00a0StatefulSet \u6765\u518d\u6b21\u7684\u6539\u53d8\u5bb9\u5668\u955c\u50cf\u3002<\/p>\n<div>\n<pre>kubectl patch statefulset web --type=\\'json\\' -p=\\'[{\\\"op\\\": \\\"replace\\\", \\\"path\\\": \\\"\/spec\/template\/spec\/containers\/0\/image\\\", \\\"value\\\":\\\"gcr.io\/google_containers\/nginx-slim:0.8\\\"}]\\'\nstatefulset.apps\/web patched\n<\/pre>\n<\/div>\n<p>\u5728\u53e6\u4e00\u4e2a\u7ec8\u7aef\u76d1\u63a7 StatefulSet \u4e2d\u7684 Pod\u3002<\/p>\n<div>\n<pre>kubectl get po -l app=nginx -w\nNAME      READY     STATUS    RESTARTS   AGE\nweb-0     1\/1       Running   0          7m\nweb-1     1\/1       Running   0          7m\nweb-2     1\/1       Running   0          8m\nweb-2     1\/1       Terminating   0         8m\nweb-2     1\/1       Terminating   0         8m\nweb-2     0\/1       Terminating   0         8m\nweb-2     0\/1       Terminating   0         8m\nweb-2     0\/1       Terminating   0         8m\nweb-2     0\/1       Terminating   0         8m\nweb-2     0\/1       Pending   0         0s\nweb-2     0\/1       Pending   0         0s\nweb-2     0\/1       ContainerCreating   0         0s\nweb-2     1\/1       Running   0         19s\nweb-1     1\/1       Terminating   0         8m\nweb-1     0\/1       Terminating   0         8m\nweb-1     0\/1       Terminating   0         8m\nweb-1     0\/1       Terminating   0         8m\nweb-1     0\/1       Pending   0         0s\nweb-1     0\/1       Pending   0         0s\nweb-1     0\/1       ContainerCreating   0         0s\nweb-1     1\/1       Running   0         6s\nweb-0     1\/1       Terminating   0         7m\nweb-0     1\/1       Terminating   0         7m\nweb-0     0\/1       Terminating   0         7m\nweb-0     0\/1       Terminating   0         7m\nweb-0     0\/1       Terminating   0         7m\nweb-0     0\/1       Terminating   0         7m\nweb-0     0\/1       Pending   0         0s\nweb-0     0\/1       Pending   0         0s\nweb-0     0\/1       ContainerCreating   0         0s\nweb-0     1\/1       Running   0         10s\n<\/pre>\n<\/div>\n<p>StatefulSet \u91cc\u7684 Pod \u91c7\u7528\u548c\u5e8f\u53f7\u76f8\u53cd\u7684\u987a\u5e8f\u66f4\u65b0\u3002\u5728\u66f4\u65b0\u4e0b\u4e00\u4e2a Pod \u524d\uff0cStatefulSet \u63a7\u5236\u5668\u7ec8\u6b62\u6bcf\u4e2a Pod \u5e76\u7b49\u5f85\u5b83\u4eec\u53d8\u6210 Running \u548c Ready\u3002\u8bf7\u6ce8\u610f\uff0c\u867d\u7136\u5728\u987a\u5e8f\u540e\u7ee7\u8005\u53d8\u6210 Running \u548c Ready \u4e4b\u524d StatefulSet \u63a7\u5236\u5668\u4e0d\u4f1a\u66f4\u65b0\u4e0b\u4e00\u4e2a Pod\uff0c\u4f46\u5b83\u4ecd\u7136\u4f1a\u91cd\u5efa\u4efb\u4f55\u5728\u66f4\u65b0\u8fc7\u7a0b\u4e2d\u53d1\u751f\u6545\u969c\u7684 Pod\uff0c\u4f7f\u7528\u7684\u662f\u5b83\u4eec\u5f53\u524d\u7684\u7248\u672c\u3002\u5df2\u7ecf\u63a5\u6536\u5230\u66f4\u65b0\u8bf7\u6c42\u7684 Pod \u5c06\u4f1a\u88ab\u6062\u590d\u4e3a\u66f4\u65b0\u7684\u7248\u672c\uff0c\u6ca1\u6709\u6536\u5230\u8bf7\u6c42\u7684 Pod \u5219\u4f1a\u88ab\u6062\u590d\u4e3a\u4e4b\u524d\u7684\u7248\u672c\u3002\u50cf\u8fd9\u6837\uff0c\u63a7\u5236\u5668\u5c1d\u8bd5\u7ee7\u7eed\u4f7f\u5e94\u7528\u4fdd\u6301\u5065\u5eb7\u5e76\u5728\u51fa\u73b0\u95f4\u6b47\u6027\u6545\u969c\u65f6\u4fdd\u6301\u66f4\u65b0\u7684\u4e00\u81f4\u6027\u3002<br \/>\n\u83b7\u53d6 Pod \u6765\u67e5\u770b\u4ed6\u4eec\u7684\u5bb9\u5668\u955c\u50cf\u3002<\/p>\n<div>\n<pre>for p in 0 1 2; do kubectl get po web-$p --template \\'{{range $i, $c := .spec.containers}}{{$c.image}}{{end}}\\'; echo; done\nk8s.gcr.io\/nginx-slim:0.8\nk8s.gcr.io\/nginx-slim:0.8\nk8s.gcr.io\/nginx-slim:0.8\n<\/pre>\n<\/div>\n<p>StatefulSet \u4e2d\u7684\u6240\u6709 Pod \u73b0\u5728\u90fd\u5728\u8fd0\u884c\u4e4b\u524d\u7684\u5bb9\u5668\u955c\u50cf\u3002<br \/>\n\u5c0f\u7a8d\u95e8\uff1a\u4f60\u8fd8\u53ef\u4ee5\u4f7f\u7528\u00a0kubectl rollout status sts\/&lt;name&gt;\u00a0\u6765\u67e5\u770b rolling update \u7684\u72b6\u6001\u3002<\/p>\n<h4 id=\\\"\u5206\u6bb5\u66f4\u65b0\\\">\u5206\u6bb5\u66f4\u65b0<\/h4>\n<p>\u4f60\u53ef\u4ee5\u4f7f\u7528\u00a0RollingUpdate\u00a0\u66f4\u65b0\u7b56\u7565\u7684\u00a0partition\u00a0\u53c2\u6570\u6765\u5206\u6bb5\u66f4\u65b0\u4e00\u4e2a StatefulSet\u3002\u5206\u6bb5\u7684\u66f4\u65b0\u5c06\u4f1a\u4f7f StatefulSet \u4e2d\u7684\u5176\u4f59\u6240\u6709 Pod \u4fdd\u6301\u5f53\u524d\u7248\u672c\u7684\u540c\u65f6\u4ec5\u5141\u8bb8\u6539\u53d8 StatefulSet \u7684\u00a0.spec.template\u3002<br \/>\nPatch\u00a0web\u00a0StatefulSet \u6765\u5bf9\u00a0updateStrategy\u00a0\u5b57\u6bb5\u6dfb\u52a0\u4e00\u4e2a\u5206\u533a\u3002<\/p>\n<div>\n<pre>kubectl patch statefulset web -p \\'{\\\"spec\\\":{\\\"updateStrategy\\\":{\\\"type\\\":\\\"RollingUpdate\\\",\\\"rollingUpdate\\\":{\\\"partition\\\":3}}}}\\'\nstatefulset.apps\/web patched\n<\/pre>\n<\/div>\n<p>\u518d\u6b21 Patch StatefulSet \u6765\u6539\u53d8\u5bb9\u5668\u955c\u50cf\u3002<\/p>\n<div>\n<pre>kubectl patch statefulset web --type=\\'json\\' -p=\\'[{\\\"op\\\": \\\"replace\\\", \\\"path\\\": \\\"\/spec\/template\/spec\/containers\/0\/image\\\", \\\"value\\\":\\\"k8s.gcr.io\/nginx-slim:0.7\\\"}]\\'\nstatefulset.apps\/web patched\n<\/pre>\n<\/div>\n<p>\u5220\u9664 StatefulSet \u4e2d\u7684 Pod\u3002<\/p>\n<div>\n<pre>kubectl delete po web-2\npod \\\"web-2\\\" deleted\n<\/pre>\n<\/div>\n<p>\u7b49\u5f85 Pod \u53d8\u6210 Running \u548c Ready\u3002<\/p>\n<div>\n<pre>kubectl get po -lapp=nginx -w\nNAME      READY     STATUS              RESTARTS   AGE\nweb-0     1\/1       Running             0          4m\nweb-1     1\/1       Running             0          4m\nweb-2     0\/1       ContainerCreating   0          11s\nweb-2     1\/1       Running   0         18s\n<\/pre>\n<\/div>\n<p>\u83b7\u53d6 Pod \u7684\u5bb9\u5668\u3002<\/p>\n<div>\n<pre>kubectl get po web-2 --template \\'{{range $i, $c := .spec.containers}}{{$c.image}}{{end}}\\'\nk8s.gcr.io\/nginx-slim:0.8\n<\/pre>\n<\/div>\n<p>\u8bf7\u6ce8\u610f\uff0c\u867d\u7136\u66f4\u65b0\u7b56\u7565\u662f\u00a0RollingUpdate\uff0cStatefulSet \u63a7\u5236\u5668\u8fd8\u662f\u4f1a\u4f7f\u7528\u539f\u59cb\u7684\u5bb9\u5668\u6062\u590d Pod\u3002\u8fd9\u662f\u56e0\u4e3a Pod \u7684\u5e8f\u53f7\u6bd4\u00a0updateStrategy\u00a0\u6307\u5b9a\u7684\u00a0partition\u00a0\u66f4\u5c0f\u3002<\/p>\n<h4 id=\\\"\u7070\u5ea6\u6269\u5bb9\\\">\u7070\u5ea6\u6269\u5bb9<\/h4>\n<p>\u4f60\u53ef\u4ee5\u901a\u8fc7\u51cf\u5c11\u00a0<a href=\\\"https:\/\/kubernetes.io\/zh\/docs\/tutorials\/stateful-application\/basic-stateful-set\/#%E5%88%86%E6%AE%B5%E6%9B%B4%E6%96%B0\\\">\u4e0a\u6587<\/a>\u6307\u5b9a\u7684\u00a0partition\u00a0\u6765\u8fdb\u884c\u7070\u5ea6\u6269\u5bb9\uff0c\u4ee5\u6b64\u6765\u6d4b\u8bd5\u4f60\u7684\u7a0b\u5e8f\u7684\u6539\u52a8\u3002<br \/>\nPatch StatefulSet \u6765\u51cf\u5c11\u5206\u533a\u3002<\/p>\n<div>\n<pre>kubectl patch statefulset web -p \\'{\\\"spec\\\":{\\\"updateStrategy\\\":{\\\"type\\\":\\\"RollingUpdate\\\",\\\"rollingUpdate\\\":{\\\"partition\\\":2}}}}\\'\nstatefulset.apps\/web patched\n<\/pre>\n<\/div>\n<p>\u7b49\u5f85\u00a0web-2\u00a0\u53d8\u6210 Running \u548c Ready\u3002<\/p>\n<div>\n<pre>kubectl get po -lapp=nginx -w\nNAME      READY     STATUS              RESTARTS   AGE\nweb-0     1\/1       Running             0          4m\nweb-1     1\/1       Running             0          4m\nweb-2     0\/1       ContainerCreating   0          11s\nweb-2     1\/1       Running   0         18s\n<\/pre>\n<\/div>\n<p>\u83b7\u53d6 Pod \u7684\u5bb9\u5668\u3002<\/p>\n<div>\n<pre>kubectl get po web-2 --template \\'{{range $i, $c := .spec.containers}}{{$c.image}}{{end}}\\'\nk8s.gcr.io\/nginx-slim:0.7\n<\/pre>\n<\/div>\n<p>\u5f53\u4f60\u6539\u53d8\u00a0partition\u00a0\u65f6\uff0cStatefulSet \u4f1a\u81ea\u52a8\u7684\u66f4\u65b0\u00a0web-2\u00a0Pod\uff0c\u8fd9\u662f\u56e0\u4e3a Pod \u7684\u5e8f\u53f7\u5c0f\u4e8e\u6216\u7b49\u4e8e\u00a0partition\u3002<br \/>\n\u5220\u9664\u00a0web-1\u00a0Pod\u3002<\/p>\n<div>\n<pre>kubectl delete po web-1\npod \\\"web-1\\\" deleted\n<\/pre>\n<\/div>\n<p>\u7b49\u5f85\u00a0web-1\u00a0\u53d8\u6210 Running \u548c Ready\u3002<\/p>\n<div>\n<pre>kubectl get po -lapp=nginx -w\nNAME      READY     STATUS        RESTARTS   AGE\nweb-0     1\/1       Running       0          6m\nweb-1     0\/1       Terminating   0          6m\nweb-2     1\/1       Running       0          2m\nweb-1     0\/1       Terminating   0         6m\nweb-1     0\/1       Terminating   0         6m\nweb-1     0\/1       Terminating   0         6m\nweb-1     0\/1       Pending   0         0s\nweb-1     0\/1       Pending   0         0s\nweb-1     0\/1       ContainerCreating   0         0s\nweb-1     1\/1       Running   0         18s\n<\/pre>\n<\/div>\n<p>\u83b7\u53d6\u00a0web-1\u00a0Pod \u7684\u5bb9\u5668\u3002<\/p>\n<div>\n<pre>kubectl get po web-1 --template \\'{{range $i, $c := .spec.containers}}{{$c.image}}{{end}}\\'\nk8s.gcr.io\/nginx-slim:0.8\n<\/pre>\n<\/div>\n<p>web-1\u00a0\u88ab\u6309\u7167\u539f\u6765\u7684\u914d\u7f6e\u6062\u590d\uff0c\u56e0\u4e3a Pod \u7684\u5e8f\u53f7\u5c0f\u4e8e\u5206\u533a\u3002\u5f53\u6307\u5b9a\u4e86\u5206\u533a\u65f6\uff0c\u5982\u679c\u66f4\u65b0\u4e86 StatefulSet \u7684\u00a0.spec.template\uff0c\u5219\u6240\u6709\u5e8f\u53f7\u5927\u4e8e\u6216\u7b49\u4e8e\u5206\u533a\u7684 Pod \u90fd\u5c06\u88ab\u66f4\u65b0\u3002\u5982\u679c\u4e00\u4e2a\u5e8f\u53f7\u5c0f\u4e8e\u5206\u533a\u7684 Pod \u88ab\u5220\u9664\u6216\u8005\u7ec8\u6b62\uff0c\u5b83\u5c06\u88ab\u6309\u7167\u539f\u6765\u7684\u914d\u7f6e\u6062\u590d\u3002<\/p>\n<h4 id=\\\"\u5206\u9636\u6bb5\u7684\u6269\u5bb9\\\">\u5206\u9636\u6bb5\u7684\u6269\u5bb9<\/h4>\n<p>\u4f60\u53ef\u4ee5\u4f7f\u7528\u7c7b\u4f3c<a href=\\\"https:\/\/kubernetes.io\/zh\/docs\/tutorials\/stateful-application\/basic-stateful-set\/#%E7%81%B0%E5%BA%A6%E6%89%A9%E5%AE%B9\\\">\u7070\u5ea6\u6269\u5bb9<\/a>\u7684\u65b9\u6cd5\u6267\u884c\u4e00\u6b21\u5206\u9636\u6bb5\u7684\u6269\u5bb9\uff08\u4f8b\u5982\u4e00\u6b21\u7ebf\u6027\u7684\u3001\u7b49\u6bd4\u7684\u6216\u8005\u6307\u6570\u5f62\u5f0f\u7684\u6269\u5bb9\uff09\u3002\u8981\u6267\u884c\u4e00\u6b21\u5206\u9636\u6bb5\u7684\u6269\u5bb9\uff0c\u4f60\u9700\u8981\u8bbe\u7f6e\u00a0partition\u00a0\u4e3a\u5e0c\u671b\u63a7\u5236\u5668\u6682\u505c\u66f4\u65b0\u7684\u5e8f\u53f7\u3002<br \/>\n\u5206\u533a\u5f53\u524d\u4e3a2\u3002\u8bf7\u5c06\u5206\u533a\u8bbe\u7f6e\u4e3a0\u3002<\/p>\n<div>\n<pre>kubectl patch statefulset web -p \\'{\\\"spec\\\":{\\\"updateStrategy\\\":{\\\"type\\\":\\\"RollingUpdate\\\",\\\"rollingUpdate\\\":{\\\"partition\\\":0}}}}\\'\nstatefulset.apps\/web patched\n<\/pre>\n<\/div>\n<p>\u7b49\u5f85 StatefulSet \u4e2d\u7684\u6240\u6709 Pod \u53d8\u6210 Running \u548c Ready\u3002<\/p>\n<div>\n<pre>kubectl get po -lapp=nginx -w\nNAME      READY     STATUS              RESTARTS   AGE\nweb-0     1\/1       Running             0          3m\nweb-1     0\/1       ContainerCreating   0          11s\nweb-2     1\/1       Running             0          2m\nweb-1     1\/1       Running   0         18s\nweb-0     1\/1       Terminating   0         3m\nweb-0     1\/1       Terminating   0         3m\nweb-0     0\/1       Terminating   0         3m\nweb-0     0\/1       Terminating   0         3m\nweb-0     0\/1       Terminating   0         3m\nweb-0     0\/1       Terminating   0         3m\nweb-0     0\/1       Pending   0         0s\nweb-0     0\/1       Pending   0         0s\nweb-0     0\/1       ContainerCreating   0         0s\nweb-0     1\/1       Running   0         3s\n<\/pre>\n<\/div>\n<p>\u83b7\u53d6 Pod \u7684\u5bb9\u5668\u3002<\/p>\n<div>\n<pre>for p in 0 1 2; do kubectl get po web-$p --template \\'{{range $i, $c := .spec.containers}}{{$c.image}}{{end}}\\'; echo; done\nk8s.gcr.io\/nginx-slim:0.7\nk8s.gcr.io\/nginx-slim:0.7\nk8s.gcr.io\/nginx-slim:0.7\n<\/pre>\n<\/div>\n<p>\u5c06\u00a0partition\u00a0\u6539\u53d8\u4e3a\u00a00\u00a0\u4ee5\u5141\u8bb8 StatefulSet \u63a7\u5236\u5668\u7ee7\u7eed\u66f4\u65b0\u8fc7\u7a0b\u3002<\/p>\n<h3 id=\\\"on-delete-\u7b56\u7565\\\">On Delete \u7b56\u7565<\/h3>\n<p>OnDelete\u00a0\u66f4\u65b0\u7b56\u7565\u5b9e\u73b0\u4e86\u4f20\u7edf\uff081.7 \u4e4b\u524d\uff09\u884c\u4e3a\uff0c\u5b83\u4e5f\u662f\u9ed8\u8ba4\u7684\u66f4\u65b0\u7b56\u7565\u3002\u5f53\u4f60\u9009\u62e9\u8fd9\u4e2a\u66f4\u65b0\u7b56\u7565\u5e76\u4fee\u6539 StatefulSet \u7684\u00a0.spec.template\u00a0\u5b57\u6bb5\u65f6\uff0cStatefulSet \u63a7\u5236\u5668\u5c06\u4e0d\u4f1a\u81ea\u52a8\u7684\u66f4\u65b0 Pod\u3002<\/p>\n<h2 id=\\\"\u5220\u9664-statefulset\\\">\u5220\u9664 StatefulSet<\/h2>\n<p>StatefulSet \u540c\u65f6\u652f\u6301\u7ea7\u8054\u548c\u975e\u7ea7\u8054\u5220\u9664\u3002\u4f7f\u7528\u975e\u7ea7\u8054\u65b9\u5f0f\u5220\u9664 StatefulSet \u65f6\uff0cStatefulSet \u7684 Pod \u4e0d\u4f1a\u88ab\u5220\u9664\u3002\u4f7f\u7528\u7ea7\u8054\u5220\u9664\u65f6\uff0cStatefulSet \u548c\u5b83\u7684 Pod \u90fd\u4f1a\u88ab\u5220\u9664\u3002<\/p>\n<h3 id=\\\"\u975e\u7ea7\u8054\u5220\u9664\\\">\u975e\u7ea7\u8054\u5220\u9664<\/h3>\n<p>\u5728\u4e00\u4e2a\u7ec8\u7aef\u7a97\u53e3\u67e5\u770b StatefulSet \u4e2d\u7684 Pod\u3002<\/p>\n<pre>kubectl get pods -w -l app=nginx\n<\/pre>\n<p>\u4f7f\u7528\u00a0<a href=\\\"https:\/\/kubernetes.io\/zh\/docs\/reference\/generated\/kubectl\/kubectl-commands\/#delete\\\">kubectl delete<\/a>\u00a0\u5220\u9664 StatefulSet\u3002\u8bf7\u786e\u4fdd\u63d0\u4f9b\u4e86\u00a0&#8211;cascade=false\u00a0\u53c2\u6570\u7ed9\u547d\u4ee4\u3002\u8fd9\u4e2a\u53c2\u6570\u544a\u8bc9 Kubernetes \u53ea\u5220\u9664 StatefulSet \u800c\u4e0d\u8981\u5220\u9664\u5b83\u7684\u4efb\u4f55 Pod\u3002<\/p>\n<div>\n<pre>kubectl delete statefulset web --cascade=false\nstatefulset.apps \\\"web\\\" deleted\n<\/pre>\n<\/div>\n<p>\u83b7\u53d6 Pod \u6765\u68c0\u67e5\u4ed6\u4eec\u7684\u72b6\u6001\u3002<\/p>\n<div>\n<pre>kubectl get pods -l app=nginx\nNAME      READY     STATUS    RESTARTS   AGE\nweb-0     1\/1       Running   0          6m\nweb-1     1\/1       Running   0          7m\nweb-2     1\/1       Running   0          5m\n<\/pre>\n<\/div>\n<p>\u867d\u7136\u00a0web\u00a0\u5df2\u7ecf\u88ab\u5220\u9664\u4e86\uff0c\u4f46\u6240\u6709 Pod \u4ecd\u7136\u5904\u4e8e Running \u548c Ready \u72b6\u6001\u3002 \u5220\u9664\u00a0web-0\u3002<\/p>\n<div>\n<pre>kubectl delete pod web-0\npod \\\"web-0\\\" deleted\n<\/pre>\n<\/div>\n<p>\u83b7\u53d6 StatefulSet \u7684 Pod\u3002<\/p>\n<div>\n<pre>kubectl get pods -l app=nginx\nNAME      READY     STATUS    RESTARTS   AGE\nweb-1     1\/1       Running   0          10m\nweb-2     1\/1       Running   0          7m\n<\/pre>\n<\/div>\n<p>\u7531\u4e8e\u00a0web\u00a0StatefulSet \u5df2\u7ecf\u88ab\u5220\u9664\uff0cweb-0\u6ca1\u6709\u88ab\u91cd\u65b0\u542f\u52a8\u3002<br \/>\n\u5728\u4e00\u4e2a\u7ec8\u7aef\u76d1\u63a7 StatefulSet \u7684 Pod\u3002<\/p>\n<div>\n<pre>kubectl get pods -w -l app=nginx\n<\/pre>\n<\/div>\n<p>\u5728\u53e6\u4e00\u4e2a\u7ec8\u7aef\u91cc\u91cd\u65b0\u521b\u5efa StatefulSet\u3002\u8bf7\u6ce8\u610f\uff0c\u9664\u975e\u4f60\u5220\u9664\u4e86\u00a0nginx\u00a0Service \uff08\u4f60\u4e0d\u5e94\u8be5\u8fd9\u6837\u505a\uff09\uff0c\u4f60\u5c06\u4f1a\u770b\u5230\u4e00\u4e2a\u9519\u8bef\uff0c\u63d0\u793a Service \u5df2\u7ecf\u5b58\u5728\u3002<\/p>\n<div>\n<pre>kubectl apply -f web.yaml\nstatefulset.apps\/web created\nservice\/nginx unchanged\n<\/pre>\n<\/div>\n<p>\u8bf7\u5ffd\u7565\u8fd9\u4e2a\u9519\u8bef\u3002\u5b83\u4ec5\u8868\u793a kubernetes \u8fdb\u884c\u4e86\u4e00\u6b21\u521b\u5efa nginx Headless Service \u7684\u5c1d\u8bd5\uff0c\u5c3d\u7ba1\u90a3\u4e2a Service \u5df2\u7ecf\u5b58\u5728\u3002<br \/>\n\u5728\u7b2c\u4e00\u4e2a\u7ec8\u7aef\u4e2d\u8fd0\u884c\u5e76\u68c0\u67e5\u00a0kubectl get\u00a0\u547d\u4ee4\u7684\u8f93\u51fa\u3002<\/p>\n<div>\n<pre>kubectl get pods -w -l app=nginx\nNAME      READY     STATUS    RESTARTS   AGE\nweb-1     1\/1       Running   0          16m\nweb-2     1\/1       Running   0          2m\nNAME      READY     STATUS    RESTARTS   AGE\nweb-0     0\/1       Pending   0          0s\nweb-0     0\/1       Pending   0         0s\nweb-0     0\/1       ContainerCreating   0         0s\nweb-0     1\/1       Running   0         18s\nweb-2     1\/1       Terminating   0         3m\nweb-2     0\/1       Terminating   0         3m\nweb-2     0\/1       Terminating   0         3m\nweb-2     0\/1       Terminating   0         3m\n<\/pre>\n<\/div>\n<p>\u5f53\u91cd\u65b0\u521b\u5efa\u00a0web\u00a0StatefulSet \u65f6\uff0cweb-0\u88ab\u7b2c\u4e00\u4e2a\u91cd\u65b0\u542f\u52a8\u3002\u7531\u4e8e\u00a0web-1\u00a0\u5df2\u7ecf\u5904\u4e8e Running \u548c Ready \u72b6\u6001\uff0c\u5f53\u00a0web-0\u00a0\u53d8\u6210 Running \u548c Ready \u65f6\uff0cStatefulSet \u4f1a\u76f4\u63a5\u63a5\u6536\u8fd9\u4e2a Pod\u3002\u7531\u4e8e\u4f60\u91cd\u65b0\u521b\u5efa\u7684 StatefulSet \u7684\u00a0replicas\u00a0\u7b49\u4e8e 2\uff0c\u4e00\u65e6\u00a0web-0\u00a0\u88ab\u91cd\u65b0\u521b\u5efa\u5e76\u4e14\u00a0web-1\u00a0\u88ab\u8ba4\u4e3a\u5df2\u7ecf\u5904\u4e8e Running \u548c Ready \u72b6\u6001\u65f6\uff0cweb-2\u5c06\u4f1a\u88ab\u7ec8\u6b62\u3002<br \/>\n\u8ba9\u6211\u4eec\u518d\u770b\u770b\u88ab Pod \u7684 web \u670d\u52a1\u5668\u52a0\u8f7d\u7684\u00a0index.html\u00a0\u7684\u5185\u5bb9\u3002<\/p>\n<div>\n<pre>for i in 0 1; do kubectl exec -it web-$i -- curl localhost; done\nweb-0\nweb-1\n<\/pre>\n<\/div>\n<p>\u5c3d\u7ba1\u4f60\u540c\u65f6\u5220\u9664\u4e86 StatefulSet \u548c\u00a0web-0\u00a0Pod\uff0c\u4f46\u5b83\u4ecd\u7136\u4f7f\u7528\u6700\u521d\u5199\u5165\u00a0index.html\u00a0\u6587\u4ef6\u7684\u4e3b\u673a\u540d\u8fdb\u884c\u670d\u52a1\u3002\u8fd9\u662f\u56e0\u4e3a StatefulSet \u6c38\u8fdc\u4e0d\u4f1a\u5220\u9664\u548c\u4e00\u4e2a Pod \u76f8\u5173\u8054\u7684 PersistentVolumes\u3002\u5f53\u4f60\u91cd\u5efa\u8fd9\u4e2a StatefulSet \u5e76\u4e14\u91cd\u65b0\u542f\u52a8\u4e86\u00a0web-0\u00a0\u65f6\uff0c\u5b83\u539f\u672c\u7684 PersistentVolume \u4f1a\u88ab\u91cd\u65b0\u6302\u8f7d\u3002<\/p>\n<h3 id=\\\"\u7ea7\u8054\u5220\u9664\\\">\u7ea7\u8054\u5220\u9664<\/h3>\n<p>\u5728\u4e00\u4e2a\u7ec8\u7aef\u7a97\u53e3\u89c2\u5bdf StatefulSet \u91cc\u7684 Pod\u3002<\/p>\n<div>\n<pre>kubectl get pods -w -l app=nginx\n<\/pre>\n<\/div>\n<p>\u5728\u53e6\u4e00\u4e2a\u7a97\u53e3\u4e2d\u518d\u6b21\u5220\u9664\u8fd9\u4e2a StatefulSet\u3002\u8fd9\u6b21\u7701\u7565\u00a0&#8211;cascade=false\u00a0\u53c2\u6570\u3002<\/p>\n<div>\n<pre>kubectl delete statefulset web\nstatefulset.apps \\\"web\\\" deleted\n<\/pre>\n<\/div>\n<p>\u5728\u7b2c\u4e00\u4e2a\u7ec8\u7aef\u68c0\u67e5\u00a0kubectl get\u00a0\u547d\u4ee4\u7684\u8f93\u51fa\uff0c\u5e76\u7b49\u5f85\u6240\u6709\u7684 Pod \u53d8\u6210 Terminating \u72b6\u6001\u3002<\/p>\n<div>\n<pre>kubectl get pods -w -l app=nginx\nNAME      READY     STATUS    RESTARTS   AGE\nweb-0     1\/1       Running   0          11m\nweb-1     1\/1       Running   0          27m\nNAME      READY     STATUS        RESTARTS   AGE\nweb-0     1\/1       Terminating   0          12m\nweb-1     1\/1       Terminating   0         29m\nweb-0     0\/1       Terminating   0         12m\nweb-0     0\/1       Terminating   0         12m\nweb-0     0\/1       Terminating   0         12m\nweb-1     0\/1       Terminating   0         29m\nweb-1     0\/1       Terminating   0         29m\nweb-1     0\/1       Terminating   0         29m\n<\/pre>\n<\/div>\n<p>\u5982\u540c\u4f60\u5728<a href=\\\"https:\/\/kubernetes.io\/zh\/docs\/tutorials\/stateful-application\/basic-stateful-set\/#ordered-pod-termination\\\">\u7f29\u5bb9<\/a>\u4e00\u8282\u770b\u5230\u7684\uff0cPod \u6309\u7167\u548c\u4ed6\u4eec\u5e8f\u53f7\u7d22\u5f15\u76f8\u53cd\u7684\u987a\u5e8f\u6bcf\u6b21\u7ec8\u6b62\u4e00\u4e2a\u3002\u5728\u7ec8\u6b62\u4e00\u4e2a Pod \u524d\uff0cStatefulSet \u63a7\u5236\u5668\u4f1a\u7b49\u5f85 Pod \u540e\u7ee7\u8005\u88ab\u5b8c\u5168\u7ec8\u6b62\u3002<br \/>\n\u8bf7\u6ce8\u610f\uff0c\u867d\u7136\u7ea7\u8054\u5220\u9664\u4f1a\u5220\u9664 StatefulSet \u548c\u5b83\u7684 Pod\uff0c\u4f46\u5b83\u5e76\u4e0d\u4f1a\u5220\u9664\u548c StatefulSet \u5173\u8054\u7684 Headless Service\u3002\u4f60\u5fc5\u987b\u624b\u52a8\u5220\u9664nginx\u00a0Service\u3002<\/p>\n<div>\n<pre>kubectl delete service nginx\nservice \\\"nginx\\\" deleted\n<\/pre>\n<\/div>\n<p>\u518d\u4e00\u6b21\u91cd\u65b0\u521b\u5efa StatefulSet \u548c Headless Service\u3002<\/p>\n<div>\n<pre>kubectl apply -f web.yaml\nservice\/nginx created\nstatefulset.apps\/web created\n<\/pre>\n<\/div>\n<p>\u5f53 StatefulSet \u6240\u6709\u7684 Pod \u53d8\u6210 Running \u548c Ready \u65f6\uff0c\u83b7\u53d6\u5b83\u4eec\u7684\u00a0index.html\u00a0\u6587\u4ef6\u7684\u5185\u5bb9\u3002<\/p>\n<div>\n<pre>for i in 0 1; do kubectl exec -it web-$i -- curl localhost; done\nweb-0\nweb-1\n<\/pre>\n<\/div>\n<p>\u5373\u4f7f\u4f60\u5df2\u7ecf\u5220\u9664\u4e86 StatefulSet \u548c\u5b83\u7684\u5168\u90e8 Pod\uff0c\u8fd9\u4e9b Pod \u5c06\u4f1a\u88ab\u91cd\u65b0\u521b\u5efa\u5e76\u6302\u8f7d\u5b83\u4eec\u7684 PersistentVolumes\uff0c\u5e76\u4e14\u00a0web-0\u00a0\u548c\u00a0web-1\u00a0\u5c06\u4ecd\u7136\u4f7f\u7528\u5b83\u4eec\u7684\u4e3b\u673a\u540d\u63d0\u4f9b\u670d\u52a1\u3002<br \/>\n\u6700\u540e\u5220\u9664\u00a0web\u00a0StatefulSet \u548c\u00a0nginx\u00a0service\u3002<\/p>\n<div>\n<pre>kubectl delete service nginx\nservice \\\"nginx\\\" deleted\nkubectl delete statefulset web\nstatefulset \\\"web\\\" deleted\n<\/pre>\n<\/div>\n<h2 id=\\\"pod-\u7ba1\u7406\u7b56\u7565\\\">Pod \u7ba1\u7406\u7b56\u7565<\/h2>\n<p>\u5bf9\u4e8e\u67d0\u4e9b\u5206\u5e03\u5f0f\u7cfb\u7edf\u6765\u8bf4\uff0cStatefulSet \u7684\u987a\u5e8f\u6027\u4fdd\u8bc1\u662f\u4e0d\u5fc5\u8981\u548c\/\u6216\u8005\u4e0d\u5e94\u8be5\u7684\u3002\u8fd9\u4e9b\u7cfb\u7edf\u4ec5\u4ec5\u8981\u6c42\u552f\u4e00\u6027\u548c\u8eab\u4efd\u6807\u5fd7\u3002\u4e3a\u4e86\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\uff0c\u5728 Kubernetes 1.7 \u4e2d\u6211\u4eec\u9488\u5bf9 StatefulSet API Object \u5f15\u5165\u4e86\u00a0.spec.podManagementPolicy\u3002<\/p>\n<h3 id=\\\"orderedready-pod-\u7ba1\u7406\u7b56\u7565\\\">OrderedReady Pod \u7ba1\u7406\u7b56\u7565<\/h3>\n<p>OrderedReady\u00a0pod \u7ba1\u7406\u7b56\u7565\u662f StatefulSets \u7684\u9ed8\u8ba4\u9009\u9879\u3002\u5b83\u544a\u8bc9 StatefulSet \u63a7\u5236\u5668\u9075\u5faa\u4e0a\u6587\u5c55\u793a\u7684\u987a\u5e8f\u6027\u4fdd\u8bc1\u3002<\/p>\n<h3 id=\\\"parallel-pod-\u7ba1\u7406\u7b56\u7565\\\">Parallel Pod \u7ba1\u7406\u7b56\u7565<\/h3>\n<p>Parallel\u00a0pod \u7ba1\u7406\u7b56\u7565\u544a\u8bc9 StatefulSet \u63a7\u5236\u5668\u5e76\u884c\u7684\u7ec8\u6b62\u6240\u6709 Pod\uff0c\u5728\u542f\u52a8\u6216\u7ec8\u6b62\u53e6\u4e00\u4e2a Pod \u524d\uff0c\u4e0d\u5fc5\u7b49\u5f85\u8fd9\u4e9b Pod \u53d8\u6210 Running \u548c Ready \u6216\u8005\u5b8c\u5168\u7ec8\u6b62\u72b6\u6001\u3002<\/p>\n<table id=\\\"application-web-web-parallel-yaml\\\">\n<thead>\n<tr>\n<th><a href=\\\"https:\/\/raw.githubusercontent.com\/kubernetes\/website\/master\/content\/zh\/examples\/application\/web\/web-parallel.yaml\\\" download=\\\"application\/web\/web-parallel.yaml\\\">application\/web\/web-parallel.yaml<\/a>\u00a0<img title=\\\"Copy application\/web\/web-parallel.yaml to clipboard\\\" src=\\\"https:\/\/d33wubrfki0l68.cloudfront.net\/951ae1fcc65e28202164b32c13fa7ae04fab4a0b\/b77dc\/images\/copycode.svg\\\" \/><\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>\n<div>\n<pre>apiVersion: v1\nkind: Service\nmetadata:\n  name: nginx\n  labels:\n    app: nginx\nspec:\n  ports:\n  - port: 80\n    name: web\n  clusterIP: None\n  selector:\n    app: nginx\n---\napiVersion: apps\/v1\nkind: StatefulSet\nmetadata:\n  name: web\nspec:\n  serviceName: \\\"nginx\\\"\n  podManagementPolicy: \\\"Parallel\\\"\n  replicas: 2\n  selector:\n    matchLabels:\n      app: nginx\n  template:\n    metadata:\n      labels:\n        app: nginx\n    spec:\n      containers:\n      - name: nginx\n        image: k8s.gcr.io\/nginx-slim:0.8\n        ports:\n        - containerPort: 80\n          name: web\n        volumeMounts:\n        - name: www\n          mountPath: \/usr\/share\/nginx\/html\n  volumeClaimTemplates:\n  - metadata:\n      name: www\n    spec:\n      accessModes: [ \\\"ReadWriteOnce\\\" ]\n      resources:\n        requests:\n          storage: 1Gi\n<\/pre>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u4e0b\u8f7d\u4e0a\u9762\u7684\u4f8b\u5b50\u5e76\u4fdd\u5b58\u4e3a\u00a0web-parallel.yaml\u3002<br \/>\n\u8fd9\u4efd\u6e05\u5355\u548c\u4f60\u5728\u4e0a\u6587\u4e0b\u8f7d\u7684\u5b8c\u5168\u4e00\u6837\uff0c\u53ea\u662f\u00a0web\u00a0StatefulSet \u7684\u00a0.spec.podManagementPolicy\u00a0\u8bbe\u7f6e\u6210\u4e86\u00a0Parallel\u3002<br \/>\n\u5728\u4e00\u4e2a\u7ec8\u7aef\u7a97\u53e3\u67e5\u770b StatefulSet \u4e2d\u7684 Pod\u3002<\/p>\n<div>\n<pre>kubectl get po -lapp=nginx -w\n<\/pre>\n<\/div>\n<p>\u5728\u53e6\u4e00\u4e2a\u7ec8\u7aef\u7a97\u53e3\u521b\u5efa\u6e05\u5355\u4e2d\u7684 StatefulSet \u548c Service\u3002<\/p>\n<div>\n<pre>kubectl apply -f web-parallel.yaml\nservice\/nginx created\nstatefulset.apps\/web created\n<\/pre>\n<\/div>\n<p>\u67e5\u770b\u4f60\u5728\u7b2c\u4e00\u4e2a\u7ec8\u7aef\u4e2d\u8fd0\u884c\u7684\u00a0kubectl get\u00a0\u547d\u4ee4\u7684\u8f93\u51fa\u3002<\/p>\n<div>\n<pre>kubectl get po -lapp=nginx -w\nNAME      READY     STATUS    RESTARTS   AGE\nweb-0     0\/1       Pending   0          0s\nweb-0     0\/1       Pending   0         0s\nweb-1     0\/1       Pending   0         0s\nweb-1     0\/1       Pending   0         0s\nweb-0     0\/1       ContainerCreating   0         0s\nweb-1     0\/1       ContainerCreating   0         0s\nweb-0     1\/1       Running   0         10s\nweb-1     1\/1       Running   0         10s\n<\/pre>\n<\/div>\n<p>StatefulSet \u63a7\u5236\u5668\u540c\u65f6\u542f\u52a8\u4e86\u00a0web-0\u00a0\u548c\u00a0web-1\u3002<br \/>\n\u4fdd\u6301\u7b2c\u4e8c\u4e2a\u7ec8\u7aef\u6253\u5f00\uff0c\u5e76\u5728\u53e6\u4e00\u4e2a\u7ec8\u7aef\u7a97\u53e3\u4e2d\u6269\u5bb9 StatefulSet\u3002<\/p>\n<div>\n<pre>kubectl scale statefulset\/web --replicas=4\nstatefulset.apps\/web scaled\n<\/pre>\n<\/div>\n<p>\u5728\u00a0kubectl get\u00a0\u547d\u4ee4\u8fd0\u884c\u7684\u7ec8\u7aef\u91cc\u68c0\u67e5\u5b83\u7684\u8f93\u51fa\u3002<\/p>\n<div>\n<pre>web-3     0\/1       Pending   0         0s\nweb-3     0\/1       Pending   0         0s\nweb-3     0\/1       Pending   0         7s\nweb-3     0\/1       ContainerCreating   0         7s\nweb-2     1\/1       Running   0         10s\nweb-3     1\/1       Running   0         26s\n<\/pre>\n<\/div>\n<p>StatefulSet \u63a7\u5236\u5668\u542f\u52a8\u4e86\u4e24\u4e2a\u65b0\u7684 Pod\uff0c\u800c\u4e14\u5728\u542f\u52a8\u7b2c\u4e8c\u4e2a\u4e4b\u524d\u5e76\u6ca1\u6709\u7b49\u5f85\u7b2c\u4e00\u4e2a\u53d8\u6210 Running \u548c Ready \u72b6\u6001\u3002<br \/>\n\u4fdd\u6301\u8fd9\u4e2a\u7ec8\u7aef\u6253\u5f00\uff0c\u5e76\u5728\u53e6\u4e00\u4e2a\u7ec8\u7aef\u5220\u9664\u00a0web\u00a0StatefulSet\u3002<\/p>\n<div>\n<pre>kubectl delete sts web\n<\/pre>\n<\/div>\n<p>\u5728\u53e6\u4e00\u4e2a\u7ec8\u7aef\u91cc\u518d\u6b21\u68c0\u67e5\u00a0kubectl get\u00a0\u547d\u4ee4\u7684\u8f93\u51fa\u3002<\/p>\n<div>\n<pre>web-3     1\/1       Terminating   0         9m\nweb-2     1\/1       Terminating   0         9m\nweb-3     1\/1       Terminating   0         9m\nweb-2     1\/1       Terminating   0         9m\nweb-1     1\/1       Terminating   0         44m\nweb-0     1\/1       Terminating   0         44m\nweb-0     0\/1       Terminating   0         44m\nweb-3     0\/1       Terminating   0         9m\nweb-2     0\/1       Terminating   0         9m\nweb-1     0\/1       Terminating   0         44m\nweb-0     0\/1       Terminating   0         44m\nweb-2     0\/1       Terminating   0         9m\nweb-2     0\/1       Terminating   0         9m\nweb-2     0\/1       Terminating   0         9m\nweb-1     0\/1       Terminating   0         44m\nweb-1     0\/1       Terminating   0         44m\nweb-1     0\/1       Terminating   0         44m\nweb-0     0\/1       Terminating   0         44m\nweb-0     0\/1       Terminating   0         44m\nweb-0     0\/1       Terminating   0         44m\nweb-3     0\/1       Terminating   0         9m\nweb-3     0\/1       Terminating   0         9m\nweb-3     0\/1       Terminating   0         9m\n<\/pre>\n<\/div>\n<p>StatefulSet \u63a7\u5236\u5668\u5c06\u5e76\u53d1\u7684\u5220\u9664\u6240\u6709 Pod\uff0c\u5728\u5220\u9664\u4e00\u4e2a Pod \u524d\u4e0d\u4f1a\u7b49\u5f85\u5b83\u7684\u987a\u5e8f\u540e\u7ee7\u8005\u7ec8\u6b62\u3002<br \/>\n\u5173\u95ed\u00a0kubectl get\u00a0\u547d\u4ee4\u8fd0\u884c\u7684\u7ec8\u7aef\u5e76\u5220\u9664nginx\u00a0Service\u3002<\/p>\n<div>\n<pre>kubectl delete svc nginx<\/pre>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>StatefulSet \u57fa\u7840 \u4f7f\u7528 StatefulSets \u6765\u7ba1\u7406\u5e94\u7528\u3002\u5982\u4f55\u521b\u5efa\u3001\u5220\u9664\u3001\u6269\u5bb9\/\u7f29\u5bb9\u548c\u66f4\u65b0 S &hellip;<\/p>\n<p class=\"read-more\"> <a class=\"\" href=\"http:\/\/www.weijing.co\/?p=1629\"> <span class=\"screen-reader-text\">StatefulSet \u57fa\u7840<\/span> \u67e5\u770b\u5168\u6587 &raquo;<\/a><\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"default","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":""},"categories":[104,123],"tags":[],"uagb_featured_image_src":{"full":false,"thumbnail":false,"medium":false,"medium_large":false,"large":false,"1536x1536":false,"2048x2048":false,"mailpoet_newsletter_max":false,"woocommerce_thumbnail":false,"woocommerce_single":false,"woocommerce_gallery_thumbnail":false,"shop_catalog":false,"shop_single":false,"shop_thumbnail":false},"uagb_author_info":{"display_name":"weijing","author_link":"http:\/\/www.weijing.co\/?author=4"},"uagb_comment_info":0,"uagb_excerpt":"StatefulSet \u57fa\u7840 \u4f7f\u7528 StatefulSets \u6765\u7ba1\u7406\u5e94\u7528\u3002\u5982\u4f55\u521b\u5efa\u3001\u5220\u9664\u3001\u6269\u5bb9\/\u7f29\u5bb9\u548c\u66f4\u65b0 S&hellip;","_links":{"self":[{"href":"http:\/\/www.weijing.co\/index.php?rest_route=\/wp\/v2\/posts\/1629"}],"collection":[{"href":"http:\/\/www.weijing.co\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.weijing.co\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.weijing.co\/index.php?rest_route=\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"http:\/\/www.weijing.co\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1629"}],"version-history":[{"count":0,"href":"http:\/\/www.weijing.co\/index.php?rest_route=\/wp\/v2\/posts\/1629\/revisions"}],"wp:attachment":[{"href":"http:\/\/www.weijing.co\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1629"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.weijing.co\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1629"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.weijing.co\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1629"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}