{"id":1736,"date":"2020-06-25T00:00:43","date_gmt":"2020-06-24T16:00:43","guid":{"rendered":"http:\/\/39.97.231.10\/?p=1736"},"modified":"2020-06-25T00:00:43","modified_gmt":"2020-06-24T16:00:43","slug":"daemonset","status":"publish","type":"post","link":"http:\/\/www.weijing.co\/?p=1736","title":{"rendered":"kubernetes DaemonSet"},"content":{"rendered":"<h1>DaemonSet<\/h1>\n<p><em>DaemonSet<\/em>\u00a0\u786e\u4fdd\u5168\u90e8\uff08\u6216\u8005\u67d0\u4e9b\uff09\u8282\u70b9\u4e0a\u8fd0\u884c\u4e00\u4e2a Pod \u7684\u526f\u672c\u3002\u5f53\u6709\u8282\u70b9\u52a0\u5165\u96c6\u7fa4\u65f6\uff0c \u4e5f\u4f1a\u4e3a\u4ed6\u4eec\u65b0\u589e\u4e00\u4e2a Pod \u3002\u5f53\u6709\u8282\u70b9\u4ece\u96c6\u7fa4\u79fb\u9664\u65f6\uff0c\u8fd9\u4e9b Pod \u4e5f\u4f1a\u88ab\u56de\u6536\u3002\u5220\u9664 DaemonSet \u5c06\u4f1a\u5220\u9664\u5b83\u521b\u5efa\u7684\u6240\u6709 Pod\u3002<br \/>\nDaemonSet \u7684\u4e00\u4e9b\u5178\u578b\u7528\u6cd5\uff1a<\/p>\n<ul>\n<li>\u5728\u6bcf\u4e2a\u8282\u70b9\u4e0a\u8fd0\u884c\u96c6\u7fa4\u5b58\u50a8 DaemonSet\uff0c\u4f8b\u5982\u00a0<code>glusterd<\/code>\u3001<code>ceph<\/code>\u3002<\/li>\n<li>\u5728\u6bcf\u4e2a\u8282\u70b9\u4e0a\u8fd0\u884c\u65e5\u5fd7\u6536\u96c6 DaemonSet\uff0c\u4f8b\u5982\u00a0<code>fluentd<\/code>\u3001<code>logstash<\/code>\u3002<\/li>\n<li>\u5728\u6bcf\u4e2a\u8282\u70b9\u4e0a\u8fd0\u884c\u76d1\u63a7 DaemonSet\uff0c\u4f8b\u5982\u00a0<a href=\\\"https:\/\/github.com\/prometheus\/node_exporter\\\">Prometheus Node Exporter<\/a>\u3001<a href=\\\"https:\/\/github.com\/Flowmill\/flowmill-k8s\/\\\">Flowmill<\/a>\u3001<a href=\\\"https:\/\/docs.sysdig.com\/\\\">Sysdig \u4ee3\u7406<\/a>\u3001<code>collectd<\/code>\u3001<a href=\\\"https:\/\/www.dynatrace.com\/technologies\/kubernetes-monitoring\/\\\">Dynatrace OneAgent<\/a>\u3001<a href=\\\"https:\/\/docs.appdynamics.com\/display\/CLOUD\/Container+Visibility+with+Kubernetes\\\">AppDynamics \u4ee3\u7406<\/a>\u3001<a href=\\\"https:\/\/docs.datadoghq.com\/agent\/kubernetes\/daemonset_setup\/\\\">Datadog \u4ee3\u7406<\/a>\u3001<a href=\\\"https:\/\/docs.newrelic.com\/docs\/integrations\/kubernetes-integration\/installation\/kubernetes-installation-configuration\\\">New Relic \u4ee3\u7406<\/a>\u3001Ganglia\u00a0<code>gmond<\/code>\u00a0\u6216\u8005\u00a0<a href=\\\"https:\/\/www.instana.com\/supported-integrations\/kubernetes-monitoring\/\\\">Instana \u4ee3\u7406<\/a>\u3002<\/li>\n<\/ul>\n<p>\u4e00\u4e2a\u7b80\u5355\u7684\u7528\u6cd5\u662f\u5728\u6240\u6709\u7684\u8282\u70b9\u4e0a\u90fd\u542f\u52a8\u4e00\u4e2a DaemonSet\uff0c\u5c06\u88ab\u4f5c\u4e3a\u6bcf\u79cd\u7c7b\u578b\u7684 daemon \u4f7f\u7528\u3002<br \/>\n\u4e00\u4e2a\u7a0d\u5fae\u590d\u6742\u7684\u7528\u6cd5\u662f\u5355\u72ec\u5bf9\u6bcf\u79cd daemon \u7c7b\u578b\u4f7f\u7528\u591a\u4e2a DaemonSet\uff0c\u4f46\u5177\u6709\u4e0d\u540c\u7684\u6807\u5fd7\uff0c \u5e76\u4e14\u5bf9\u4e0d\u540c\u786c\u4ef6\u7c7b\u578b\u5177\u6709\u4e0d\u540c\u7684\u5185\u5b58\u3001CPU \u8981\u6c42\u3002<\/p>\n<h2 id=\\\"\u7f16\u5199-daemonset-spec\\\">\u7f16\u5199 DaemonSet Spec<\/h2>\n<h3 id=\\\"\u521b\u5efa-daemonset\\\">\u521b\u5efa DaemonSet<\/h3>\n<p>\u60a8\u53ef\u4ee5\u5728 YAML \u6587\u4ef6\u4e2d\u63cf\u8ff0 DaemonSet\u3002\u4f8b\u5982\uff0c\u4e0b\u9762\u7684 daemonset.yaml \u6587\u4ef6\u63cf\u8ff0\u4e86\u4e00\u4e2a\u8fd0\u884c fluentd-elasticsearch Docker \u955c\u50cf\u7684 DaemonSet\uff1a<\/p>\n<table id=\\\"controllers-daemonset-yaml\\\" class=\\\"includecode\\\">\n<thead>\n<tr>\n<th><a href=\\\"https:\/\/raw.githubusercontent.com\/kubernetes\/website\/master\/content\/zh\/examples\/controllers\/daemonset.yaml\\\" download=\\\"controllers\/daemonset.yaml\\\"><code>controllers\/daemonset.yaml<\/code><\/a>\u00a0<img title=\\\"Copy controllers\/daemonset.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 class=\\\"highlight\\\">\n<pre><code class=\\\"language-yaml\\\" data-lang=\\\"yaml\\\">apiVersion: apps\/v1\nkind: DaemonSet\nmetadata:\n  name: fluentd-elasticsearch\n  namespace: kube-system\n  labels:\n    k8s-app: fluentd-logging\nspec:\n  selector:\n    matchLabels:\n      name: fluentd-elasticsearch\n  template:\n    metadata:\n      labels:\n        name: fluentd-elasticsearch\n    spec:\n      tolerations:\n      # this toleration is to have the daemonset runnable on master nodes\n      # remove it if your masters can\\'t run pods\n      - key: node-role.kubernetes.io\/master\n        effect: NoSchedule\n      containers:\n      - name: fluentd-elasticsearch\n        image: quay.io\/fluentd_elasticsearch\/fluentd:v2.5.2\n        resources:\n          limits:\n            memory: 200Mi\n          requests:\n            cpu: 100m\n            memory: 200Mi\n        volumeMounts:\n        - name: varlog\n          mountPath: \/var\/log\n        - name: varlibdockercontainers\n          mountPath: \/var\/lib\/docker\/containers\n          readOnly: true\n      terminationGracePeriodSeconds: 30\n      volumes:\n      - name: varlog\n        hostPath:\n          path: \/var\/log\n      - name: varlibdockercontainers\n        hostPath:\n          path: \/var\/lib\/docker\/containers\n<\/code><\/pre>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<ul>\n<li>\u57fa\u4e8e YAML \u6587\u4ef6\u521b\u5efa DaemonSet:<\/li>\n<\/ul>\n<pre><code>kubectl apply -f https:\/\/k8s.io\/examples\/controllers\/daemonset.yaml\n<\/code><\/pre>\n<h3 id=\\\"\u5fc5\u9700\u5b57\u6bb5\\\">\u5fc5\u9700\u5b57\u6bb5<\/h3>\n<p>\u548c\u5176\u5b83\u6240\u6709 Kubernetes \u914d\u7f6e\u4e00\u6837\uff0cDaemonSet \u9700\u8981\u00a0<code>apiVersion<\/code>\u3001<code>kind<\/code>\u00a0\u548c\u00a0<code>metadata<\/code>\u00a0\u5b57\u6bb5\u3002\u6709\u5173\u914d\u7f6e\u6587\u4ef6\u7684\u57fa\u672c\u4fe1\u606f\uff0c\u8be6\u89c1\u6587\u6863\u00a0<a href=\\\"https:\/\/kubernetes.io\/docs\/user-guide\/deploying-applications\/\\\">\u90e8\u7f72\u5e94\u7528<\/a>\u3001<a href=\\\"https:\/\/kubernetes.io\/docs\/tasks\/\\\">\u914d\u7f6e\u5bb9\u5668<\/a>\u00a0\u548c\u00a0<a href=\\\"https:\/\/kubernetes.io\/docs\/concepts\/overview\/object-management-kubectl\/overview\/\\\">\u4f7f\u7528 kubectl \u8fdb\u884c\u5bf9\u8c61\u7ba1\u7406<\/a>\u3002<br \/>\nDaemonSet \u4e5f\u9700\u8981\u4e00\u4e2a\u00a0<a href=\\\"https:\/\/git.k8s.io\/community\/contributors\/devel\/sig-architecture\/api-conventions.md#spec-and-status\\\"><code>.spec<\/code><\/a>\u00a0\u914d\u7f6e\u6bb5\u3002<\/p>\n<h3 id=\\\"pod-\u6a21\u677f\\\">Pod \u6a21\u677f<\/h3>\n<p><code>.spec<\/code>\u00a0\u4e2d\u552f\u4e00\u5fc5\u9700\u7684\u5b57\u6bb5\u662f\u00a0<code>.spec.template<\/code>\u3002<br \/>\n<code>.spec.template<\/code>\u00a0\u662f\u4e00\u4e2a\u00a0<a href=\\\"https:\/\/kubernetes.io\/docs\/concepts\/workloads\/pods\/pod-overview\/#pod-templates\\\">Pod \u6a21\u677f<\/a>\u3002\u9664\u4e86\u5b83\u662f\u5d4c\u5957\u7684\uff0c\u800c\u4e14\u4e0d\u5177\u6709\u00a0<code>apiVersion<\/code>\u00a0\u6216\u00a0<code>kind<\/code>\u00a0\u5b57\u6bb5\uff0c\u5b83\u4e0e\u00a0<a href=\\\"https:\/\/kubernetes.io\/docs\/concepts\/workloads\/pods\/pod\/\\\">Pod<\/a>\u00a0\u5177\u6709\u76f8\u540c\u7684 schema\u3002<br \/>\n\u9664\u4e86 Pod \u5fc5\u9700\u5b57\u6bb5\u5916\uff0c\u5728 DaemonSet \u4e2d\u7684 Pod \u6a21\u677f\u5fc5\u987b\u6307\u5b9a\u5408\u7406\u7684\u6807\u7b7e\uff08\u67e5\u770b\u00a0<a href=\\\"https:\/\/kubernetes.io\/zh\/docs\/concepts\/workloads\/controllers\/daemonset\/#pod-selector\\\">Pod Selector<\/a>\uff09\u3002<br \/>\n\u5728 DaemonSet \u4e2d\u7684 Pod \u6a21\u677f\u5fc5\u987b\u5177\u6709\u4e00\u4e2a\u503c\u4e3a\u00a0<code>Always<\/code>\u00a0\u7684\u00a0<a href=\\\"https:\/\/kubernetes.io\/docs\/user-guide\/pod-states\\\"><code>RestartPolicy<\/code><\/a>\uff0c\u6216\u8005\u672a\u6307\u5b9a\u5b83\u7684\u503c\uff0c\u9ed8\u8ba4\u662f\u00a0<code>Always<\/code>\u3002<\/p>\n<h3 id=\\\"pod-selector\\\">Pod Selector<\/h3>\n<p><code>.spec.selector<\/code>\u00a0\u5b57\u6bb5\u8868\u793a Pod Selector\uff0c\u5b83\u4e0e\u00a0Job\u00a0\u7684\u00a0<code>.spec.selector<\/code>\u00a0\u7684\u4f5c\u7528\u662f\u76f8\u540c\u7684\u3002<br \/>\n\u4ece Kubernetes 1.8 \u5f00\u59cb\uff0c\u60a8\u5fc5\u987b\u6307\u5b9a\u4e0e\u00a0<code>.spec.template<\/code>\u00a0\u7684\u6807\u7b7e\u5339\u914d\u7684 pod selector\u3002\u5f53\u4e0d\u914d\u7f6e\u65f6\uff0cpod selector \u5c06\u4e0d\u518d\u6709\u9ed8\u8ba4\u503c\u3002selector \u9ed8\u8ba4\u4e0e\u00a0<code>kubectl apply<\/code>\u00a0\u4e0d\u517c\u5bb9\u3002 \u6b64\u5916\uff0c\u4e00\u65e6\u521b\u5efa\u4e86 DaemonSet\uff0c\u5b83\u7684\u00a0<code>.spec.selector<\/code>\u00a0\u5c31\u4e0d\u80fd\u4fee\u6539\u3002\u4fee\u6539 pod selector \u53ef\u80fd\u5bfc\u81f4 Pod \u610f\u5916\u60ac\u6d6e\uff0c\u5e76\u4e14\u8fd9\u5bf9\u7528\u6237\u6765\u8bf4\u662f\u56f0\u60d1\u7684\u3002<br \/>\n<code>spec.selector<\/code>\u00a0\u8868\u793a\u4e00\u4e2a\u5bf9\u8c61\uff0c\u5b83\u7531\u5982\u4e0b\u4e24\u4e2a\u5b57\u6bb5\u7ec4\u6210\uff1a<\/p>\n<ul>\n<li><code>matchLabels<\/code>\u00a0&#8211; \u4e0e\u00a0<a href=\\\"https:\/\/kubernetes.io\/docs\/concepts\/workloads\/controllers\/replicationcontroller\/\\\">ReplicationController<\/a>\u00a0\u7684\u00a0<code>.spec.selector<\/code>\u00a0\u7684\u4f5c\u7528\u76f8\u540c\u3002<\/li>\n<li><code>matchExpressions<\/code>\u00a0&#8211; \u5141\u8bb8\u6784\u5efa\u66f4\u52a0\u590d\u6742\u7684 Selector\uff0c\u53ef\u4ee5\u901a\u8fc7\u6307\u5b9a key\u3001value \u5217\u8868 \uff0c\u4ee5\u53ca\u4e0e key \u548c value \u5217\u8868\u76f8\u5173\u7684\u64cd\u4f5c\u7b26\u3002<\/li>\n<\/ul>\n<p>\u5f53\u4e0a\u8ff0\u4e24\u4e2a\u5b57\u6bb5\u90fd\u6307\u5b9a\u65f6\uff0c\u7ed3\u679c\u8868\u793a\u7684\u662f AND \u5173\u7cfb\u3002<br \/>\n\u5982\u679c\u6307\u5b9a\u4e86\u00a0<code>.spec.selector<\/code>\uff0c\u5fc5\u987b\u4e0e\u00a0<code>.spec.template.metadata.labels<\/code>\u00a0\u76f8\u5339\u914d\u3002\u5982\u679c\u4e0e\u5b83\u4eec\u914d\u7f6e\u7684\u4e0d\u5339\u914d\uff0c\u5219\u4f1a\u88ab API \u62d2\u7edd\u3002<br \/>\n\u53e6\u5916\uff0c\u901a\u5e38\u4e0d\u5e94\u76f4\u63a5\u901a\u8fc7\u53e6\u4e00\u4e2a DaemonSet \u6216\u53e6\u4e00\u4e2a\u5de5\u4f5c\u8d1f\u8f7d\u8d44\u6e90\uff08\u4f8b\u5982 ReplicaSet\uff09\u6765\u521b\u5efa\u5176\u6807\u7b7e\u4e0e\u8be5\u9009\u62e9\u5668\u5339\u914d\u7684\u4efb\u4f55 Pod\u3002\u5426\u5219\uff0cDaemonSet\u00a0<a class=\\\"glossary-tooltip\\\" href=\\\"https:\/\/kubernetes.io\/docs\/admin\/kube-controller-manager\/\\\" target=\\\"_blank\\\" rel=\\\"noopener noreferrer\\\">\u63a7\u5236\u5668<\/a>\u4f1a\u8ba4\u4e3a\u8fd9\u4e9b Pod \u662f\u7531\u5b83\u521b\u5efa\u7684\u3002Kubernetes \u4e0d\u4f1a\u963b\u6b62\u4f60\u8fd9\u6837\u505a\u3002\u60a8\u53ef\u80fd\u8981\u6267\u884c\u6b64\u64cd\u4f5c\u7684\u4e00\u79cd\u60c5\u51b5\u662f\uff0c\u624b\u52a8\u5728\u8282\u70b9\u4e0a\u521b\u5efa\u5177\u6709\u4e0d\u540c\u503c\u7684 Pod \u8fdb\u884c\u6d4b\u8bd5\u3002<\/p>\n<h3 id=\\\"\u4ec5\u5728\u67d0\u4e9b\u8282\u70b9\u4e0a\u8fd0\u884c-pod\\\">\u4ec5\u5728\u67d0\u4e9b\u8282\u70b9\u4e0a\u8fd0\u884c Pod<\/h3>\n<p>\u5982\u679c\u6307\u5b9a\u4e86\u00a0<code>.spec.template.spec.nodeSelector<\/code>\uff0cDaemonSet Controller \u5c06\u5728\u80fd\u591f\u4e0e\u00a0<a href=\\\"https:\/\/kubernetes.io\/docs\/concepts\/configuration\/assign-pod-node\/\\\">Node Selector<\/a>\u00a0\u5339\u914d\u7684\u8282\u70b9\u4e0a\u521b\u5efa Pod\u3002\u7c7b\u4f3c\u8fd9\u79cd\u60c5\u51b5\uff0c\u53ef\u4ee5\u6307\u5b9a\u00a0<code>.spec.template.spec.affinity<\/code>\uff0c\u7136\u540e DaemonSet Controller \u5c06\u5728\u80fd\u591f\u4e0e\u00a0<a href=\\\"https:\/\/kubernetes.io\/docs\/concepts\/configuration\/assign-pod-node\/\\\">node Affinity<\/a>\u00a0\u5339\u914d\u7684\u8282\u70b9\u4e0a\u521b\u5efa Pod\u3002 \u5982\u679c\u6839\u672c\u5c31\u6ca1\u6709\u6307\u5b9a\uff0c\u5219 DaemonSet Controller \u5c06\u5728\u6240\u6709\u8282\u70b9\u4e0a\u521b\u5efa Pod\u3002<\/p>\n<h2 id=\\\"\u5982\u4f55\u8c03\u5ea6-daemon-pods\\\">\u5982\u4f55\u8c03\u5ea6 Daemon Pods<\/h2>\n<h3 id=\\\"\u901a\u8fc7\u9ed8\u8ba4-scheduler-\u8c03\u5ea6\\\">\u901a\u8fc7\u9ed8\u8ba4 scheduler \u8c03\u5ea6<\/h3>\n<div><b>FEATURE STATE:<\/b>\u00a0<code>Kubernetes v1.18 [stable]<\/code><\/div>\n<p>DaemonSet \u786e\u4fdd\u6240\u6709\u7b26\u5408\u6761\u4ef6\u7684\u8282\u70b9\u90fd\u8fd0\u884c\u8be5 Pod \u7684\u4e00\u4e2a\u526f\u672c\u3002\u901a\u5e38\uff0c\u8fd0\u884c Pod \u7684\u8282\u70b9\u7531 Kubernetes \u8c03\u5ea6\u5668\u6289\u62e9\u3002\u4e0d\u8fc7\uff0cDaemonSet pods \u7531 DaemonSet \u63a7\u5236\u5668\u521b\u5efa\u548c\u8c03\u5ea6\u3002\u8fd9\u5c06\u5f15\u5165\u4ee5\u4e0b\u95ee\u9898\uff1a<\/p>\n<ul>\n<li>Pod \u884c\u4e3a\u7684\u4e0d\u4e00\u81f4\u6027\uff1a\u7b49\u5f85\u8c03\u5ea6\u7684\u6b63\u5e38 Pod \u5df2\u88ab\u521b\u5efa\u5e76\u5904\u4e8e\u00a0<code>Pending<\/code>\u00a0\u72b6\u6001\uff0c\u4f46 DaemonSet pods \u672a\u5728\u00a0<code>Pending<\/code>\u00a0\u72b6\u6001\u4e0b\u521b\u5efa\u3002 \u8fd9\u4f7f\u7528\u6237\u611f\u5230\u56f0\u60d1\u3002<\/li>\n<li><a href=\\\"https:\/\/kubernetes.io\/docs\/concepts\/configuration\/pod-priority-preemption\/\\\">Pod preemption<\/a>\u7531\u9ed8\u8ba4 scheduler \u5904\u7406\u3002 \u542f\u7528\u62a2\u5360\u540e\uff0cDaemonSet \u63a7\u5236\u5668\u5c06\u5728\u4e0d\u8003\u8651 pod \u4f18\u5148\u7ea7\u548c\u62a2\u5360\u7684\u60c5\u51b5\u4e0b\u5236\u5b9a\u8c03\u5ea6\u51b3\u7b56\u3002<\/li>\n<\/ul>\n<p><code>ScheduleDaemonSetPods<\/code>\u00a0\u5141\u8bb8\u60a8\u4f7f\u7528\u9ed8\u8ba4\u8c03\u5ea6\u5668\u800c\u4e0d\u662f DaemonSet \u63a7\u5236\u5668\u6765\u8c03\u5ea6 DaemonSets\uff0c\u65b9\u6cd5\u662f\u5c06\u00a0<code>NodeAffinity<\/code>\u00a0\u6dfb\u52a0\u5230 DaemonSet pods\uff0c\u800c\u4e0d\u662f\u00a0<code>.spec.nodeName<\/code>\u3002 \u7136\u540e\u4f7f\u7528\u9ed8\u8ba4\u8c03\u5ea6\u5668\u5c06 pod \u7ed1\u5b9a\u5230\u76ee\u6807\u4e3b\u673a\u3002 \u5982\u679c DaemonSet pod \u7684\u4eb2\u548c\u8282\u70b9\u5df2\u5b58\u5728\uff0c\u5219\u66ff\u6362\u5b83\u3002 DaemonSet \u63a7\u5236\u5668\u4ec5\u5728\u521b\u5efa\u6216\u4fee\u6539 DaemonSet pods \u65f6\u6267\u884c\u8fd9\u4e9b\u64cd\u4f5c\uff0c\u5e76\u4e14\u4e0d\u5bf9 DaemonSet \u7684\u00a0<code>spec.template<\/code>\u00a0\u8fdb\u884c\u4efb\u4f55\u66f4\u6539\u3002<\/p>\n<div class=\\\"highlight\\\">\n<pre><code class=\\\"language-yaml\\\" data-lang=\\\"yaml\\\">nodeAffinity:\n  requiredDuringSchedulingIgnoredDuringExecution:\n    nodeSelectorTerms:\n    - matchFields:\n      - key: metadata.name\n        operator: In\n        values:\n        - target-host-name\n<\/code><\/pre>\n<\/div>\n<p>\u6b64\u5916\uff0c\u7cfb\u7edf\u4f1a\u81ea\u52a8\u6dfb\u52a0\u00a0<code>node.kubernetes.io\/unschedulable\uff1aNoSchedule<\/code>\u00a0\u5bb9\u5fcd\u5ea6\u5230 DaemonSet Pods\u3002 \u5728\u8c03\u5ea6 DaemonSet Pod \u65f6\uff0c\u9ed8\u8ba4\u8c03\u5ea6\u5668\u4f1a\u5ffd\u7565\u00a0<code>unschedulable<\/code>\u00a0\u8282\u70b9\u3002<\/p>\n<h3 id=\\\"\u6c61\u70b9\u548c\u5bb9\u5fcd\u5ea6\\\">\u6c61\u70b9\u548c\u5bb9\u5fcd\u5ea6<\/h3>\n<p>\u5c3d\u7ba1 Daemon Pods \u9075\u5faa<a href=\\\"https:\/\/kubernetes.io\/docs\/concepts\/configuration\/taint-and-toleration\\\">\u6c61\u70b9\u548c\u5bb9\u5fcd\u5ea6<\/a>\u00a0\u89c4\u5219\uff0c\u6839\u636e\u76f8\u5173\u7279\u6027\uff0c\u4f1a\u81ea\u52a8\u5c06\u4ee5\u4e0b\u5bb9\u5fcd\u5ea6\u6dfb\u52a0\u5230 DaemonSet Pods \u4e2d\u3002<\/p>\n<table>\n<thead>\n<tr>\n<th>\u5bb9\u5fcd\u5ea6\u5173\u952e\u8bcd<\/th>\n<th>\u5f71\u54cd<\/th>\n<th>\u7248\u672c<\/th>\n<th>\u63cf\u8ff0<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><code>node.kubernetes.io\/not-ready<\/code><\/td>\n<td>NoExecute<\/td>\n<td>1.13+<\/td>\n<td>DaemonSet pods will not be evicted when there are node problems such as a network partition.<\/td>\n<\/tr>\n<tr>\n<td><code>node.kubernetes.io\/unreachable<\/code><\/td>\n<td>NoExecute<\/td>\n<td>1.13+<\/td>\n<td>DaemonSet pods will not be evicted when there are node problems such as a network partition.<\/td>\n<\/tr>\n<tr>\n<td><code>node.kubernetes.io\/disk-pressure<\/code><\/td>\n<td>NoSchedule<\/td>\n<td>1.8+<\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td><code>node.kubernetes.io\/memory-pressure<\/code><\/td>\n<td>NoSchedule<\/td>\n<td>1.8+<\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td><code>node.kubernetes.io\/unschedulable<\/code><\/td>\n<td>NoSchedule<\/td>\n<td>1.12+<\/td>\n<td>DaemonSet pods tolerate unschedulable attributes by default scheduler.<\/td>\n<\/tr>\n<tr>\n<td><code>node.kubernetes.io\/network-unavailable<\/code><\/td>\n<td>NoSchedule<\/td>\n<td>1.12+<\/td>\n<td>DaemonSet pods, who uses host network, tolerate network-unavailable attributes by default scheduler.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2 id=\\\"\u4e0e-daemon-pods-\u901a\u4fe1\\\">\u4e0e Daemon Pods \u901a\u4fe1<\/h2>\n<p>\u4e0e DaemonSet \u4e2d\u7684 Pod \u8fdb\u884c\u901a\u4fe1\u7684\u51e0\u79cd\u53ef\u80fd\u6a21\u5f0f\u5982\u4e0b\uff1a<\/p>\n<ul>\n<li><strong>Push<\/strong>\uff1a\u5c06 DaemonSet \u4e2d\u7684 Pod \u914d\u7f6e\u4e3a\u5c06\u66f4\u65b0\u53d1\u9001\u5230\u53e6\u4e00\u4e2a Service\uff0c\u4f8b\u5982\u7edf\u8ba1\u6570\u636e\u5e93\u3002<\/li>\n<li><strong>NodeIP \u548c\u5df2\u77e5\u7aef\u53e3<\/strong>\uff1aDaemonSet \u4e2d\u7684 Pod \u53ef\u4ee5\u4f7f\u7528\u00a0<code>hostPort<\/code>\uff0c\u4ece\u800c\u53ef\u4ee5\u901a\u8fc7\u8282\u70b9 IP \u8bbf\u95ee\u5230 Pod\u3002\u5ba2\u6237\u7aef\u80fd\u901a\u8fc7\u67d0\u79cd\u65b9\u6cd5\u83b7\u53d6\u8282\u70b9 IP \u5217\u8868\uff0c\u5e76\u4e14\u57fa\u4e8e\u6b64\u4e5f\u53ef\u4ee5\u83b7\u53d6\u5230\u76f8\u5e94\u7684\u7aef\u53e3\u3002<\/li>\n<li><strong>DNS<\/strong>\uff1a\u521b\u5efa\u5177\u6709\u76f8\u540c Pod Selector \u7684\u00a0Headless Service\uff0c\u7136\u540e\u901a\u8fc7\u4f7f\u7528\u00a0<code>endpoints<\/code>\u00a0\u8d44\u6e90\u6216\u4ece DNS \u4e2d\u68c0\u7d22\u5230\u591a\u4e2a A \u8bb0\u5f55\u6765\u53d1\u73b0 DaemonSet\u3002<\/li>\n<li><strong>Service<\/strong>\uff1a\u521b\u5efa\u5177\u6709\u76f8\u540c Pod Selector \u7684 Service\uff0c\u5e76\u4f7f\u7528\u8be5 Service \u968f\u673a\u8bbf\u95ee\u5230\u67d0\u4e2a\u8282\u70b9\u4e0a\u7684 daemon\uff08\u6ca1\u6709\u529e\u6cd5\u8bbf\u95ee\u5230\u7279\u5b9a\u8282\u70b9\uff09\u3002<\/li>\n<\/ul>\n<h2 id=\\\"\u66f4\u65b0-daemonset\\\">\u66f4\u65b0 DaemonSet<\/h2>\n<p>\u5982\u679c\u4fee\u6539\u4e86\u8282\u70b9\u6807\u7b7e\uff0cDaemonSet \u5c06\u7acb\u523b\u5411\u65b0\u5339\u914d\u4e0a\u7684\u8282\u70b9\u6dfb\u52a0 Pod\uff0c\u540c\u65f6\u5220\u9664\u4e0d\u80fd\u591f\u5339\u914d\u7684\u8282\u70b9\u4e0a\u7684 Pod\u3002<br \/>\n\u60a8\u53ef\u4ee5\u4fee\u6539 DaemonSet \u521b\u5efa\u7684 Pod\u3002\u7136\u800c\uff0c\u4e0d\u5141\u8bb8\u5bf9 Pod \u7684\u6240\u6709\u5b57\u6bb5\u8fdb\u884c\u66f4\u65b0\u3002\u5f53\u4e0b\u6b21 \u8282\u70b9\uff08\u5373\u4f7f\u5177\u6709\u76f8\u540c\u7684\u540d\u79f0\uff09\u88ab\u521b\u5efa\u65f6\uff0cDaemonSet Controller \u8fd8\u4f1a\u4f7f\u7528\u6700\u521d\u7684\u6a21\u677f\u3002<br \/>\n\u60a8\u53ef\u4ee5\u5220\u9664\u4e00\u4e2a DaemonSet\u3002\u5982\u679c\u4f7f\u7528\u00a0<code>kubectl<\/code>\u00a0\u5e76\u6307\u5b9a\u00a0<code>--cascade=false<\/code>\u00a0\u9009\u9879\uff0c\u5219 Pod \u5c06\u88ab\u4fdd\u7559\u5728\u8282\u70b9\u4e0a\u3002\u7136\u540e\u53ef\u4ee5\u521b\u5efa\u5177\u6709\u4e0d\u540c\u6a21\u677f\u7684\u65b0 DaemonSet\u3002\u5177\u6709\u4e0d\u540c\u6a21\u677f\u7684\u65b0 DaemonSet \u5c06\u80fd\u591f\u901a\u8fc7\u6807\u7b7e\u5339\u914d\u5e76\u8bc6\u522b\u6240\u6709\u5df2\u7ecf\u5b58\u5728\u7684 Pod\u3002 \u5982\u679c\u6709\u4efb\u4f55 Pod \u9700\u8981\u66ff\u6362\uff0c\u5219 DaemonSet \u6839\u636e\u5b83\u7684\u00a0<code>updateStrategy<\/code>\u00a0\u6765\u66ff\u6362\u3002<\/p>\n<h2 id=\\\"daemonset-\u7684\u53ef\u66ff\u4ee3\u9009\u62e9\\\">DaemonSet \u7684\u53ef\u66ff\u4ee3\u9009\u62e9<\/h2>\n<h3 id=\\\"init-\u811a\u672c\\\">init \u811a\u672c<\/h3>\n<p>\u6211\u4eec\u5f88\u53ef\u80fd\u5e0c\u671b\u76f4\u63a5\u5728\u4e00\u4e2a\u8282\u70b9\u4e0a\u542f\u52a8 daemon \u8fdb\u7a0b\uff08\u4f8b\u5982\uff0c\u4f7f\u7528\u00a0<code>init<\/code>\u3001<code>upstartd<\/code>\u3001\u6216\u00a0<code>systemd<\/code>\uff09\u3002\u8fd9\u975e\u5e38\u597d\uff0c\u4f46\u57fa\u4e8e DaemonSet \u6765\u8fd0\u884c\u8fd9\u4e9b\u8fdb\u7a0b\u6709\u5982\u4e0b\u4e00\u4e9b\u597d\u5904\uff1a<\/p>\n<ul>\n<li>\u50cf\u5bf9\u5f85\u5e94\u7528\u7a0b\u5e8f\u4e00\u6837\uff0c\u5177\u5907\u4e3a daemon \u63d0\u4f9b\u76d1\u63a7\u548c\u7ba1\u7406\u65e5\u5fd7\u7684\u80fd\u529b\u3002<\/li>\n<li>\u4e3a daemon \u548c\u5e94\u7528\u7a0b\u5e8f\u4f7f\u7528\u76f8\u540c\u7684\u914d\u7f6e\u8bed\u8a00\u548c\u5de5\u5177\uff08\u5982 Pod \u6a21\u677f\u3001<code>kubectl<\/code>\uff09\u3002<\/li>\n<li>\u5728\u8d44\u6e90\u53d7\u9650\u7684\u5bb9\u5668\u4e2d\u8fd0\u884c daemon\uff0c\u80fd\u591f\u589e\u52a0 daemon \u548c\u5e94\u7528\u5bb9\u5668\u7684\u9694\u79bb\u6027\u3002\u7136\u800c\uff0c\u8fd9\u4e5f\u5b9e\u73b0\u4e86\u5728\u5bb9\u5668\u4e2d\u8fd0\u884c daemon\uff0c\u4f46\u5374\u4e0d\u80fd\u5728 Pod \u4e2d\u8fd0\u884c\uff08\u4f8b\u5982\uff0c\u76f4\u63a5\u57fa\u4e8e Docker \u542f\u52a8\uff09\u3002<\/li>\n<\/ul>\n<h3 id=\\\"\u88f8-pod\\\">\u88f8 Pod<\/h3>\n<p>\u53ef\u80fd\u8981\u76f4\u63a5\u521b\u5efa Pod\uff0c\u540c\u65f6\u6307\u5b9a\u5176\u8fd0\u884c\u5728\u7279\u5b9a\u7684\u8282\u70b9\u4e0a\u3002\u7136\u800c\uff0cDaemonSet \u66ff\u6362\u4e86\u7531\u4e8e\u4efb\u4f55\u539f\u56e0\u88ab\u5220\u9664\u6216\u7ec8\u6b62\u7684 Pod\uff0c\u4f8b\u5982\u8282\u70b9\u5931\u8d25\u3001\u4f8b\u884c\u8282\u70b9\u7ef4\u62a4\u3001\u5185\u6838\u5347\u7ea7\u3002\u7531\u4e8e\u8fd9\u4e2a\u539f\u56e0\uff0c\u6211\u4eec\u5e94\u8be5\u4f7f\u7528 DaemonSet \u800c\u4e0d\u662f\u5355\u72ec\u521b\u5efa Pod\u3002<\/p>\n<h3 id=\\\"\u9759\u6001-pod\\\">\u9759\u6001 Pod<\/h3>\n<p>\u53ef\u80fd\u9700\u8981\u901a\u8fc7\u5728\u4e00\u4e2a\u6307\u5b9a\u76ee\u5f55\u4e0b\u7f16\u5199\u6587\u4ef6\u6765\u521b\u5efa Pod\uff0c\u8be5\u76ee\u5f55\u53d7 Kubelet \u6240\u76d1\u89c6\u3002\u8fd9\u4e9b Pod \u88ab\u79f0\u4e3a\u00a0\u9759\u6001 Pod\u3002 \u4e0d\u50cf DaemonSet\uff0c\u9759\u6001 Pod \u4e0d\u53d7 kubectl \u548c\u5176\u5b83 Kubernetes API \u5ba2\u6237\u7aef\u7ba1\u7406\u3002\u9759\u6001 Pod \u4e0d\u4f9d\u8d56\u4e8e apiserver\uff0c\u8fd9\u4f7f\u5f97\u5b83\u4eec\u5728\u96c6\u7fa4\u542f\u52a8\u7684\u60c5\u51b5\u4e0b\u975e\u5e38\u6709\u7528\u3002\u800c\u4e14\uff0c\u672a\u6765\u9759\u6001 Pod \u53ef\u80fd\u4f1a\u88ab\u5e9f\u5f03\u6389\u3002<\/p>\n<h3 id=\\\"deployments\\\">Deployments<\/h3>\n<p>DaemonSet \u4e0e\u00a0Deployments\u00a0\u975e\u5e38\u7c7b\u4f3c\uff0c\u5b83\u4eec\u90fd\u80fd\u521b\u5efa Pod\uff0c\u8fd9\u4e9b Pod \u5bf9\u5e94\u7684\u8fdb\u7a0b\u90fd\u4e0d\u5e0c\u671b\u88ab\u7ec8\u6b62\u6389\uff08\u4f8b\u5982\uff0cWeb \u670d\u52a1\u5668\u3001\u5b58\u50a8\u670d\u52a1\u5668\uff09\u3002 \u4e3a\u65e0\u72b6\u6001\u7684 Service \u4f7f\u7528 Deployments\uff0c\u6bd4\u5982\u524d\u7aef Frontend \u670d\u52a1\uff0c\u5b9e\u73b0\u5bf9\u526f\u672c\u7684\u6570\u91cf\u8fdb\u884c\u6269\u7f29\u5bb9\u3001\u5e73\u6ed1\u5347\u7ea7\uff0c\u6bd4\u57fa\u4e8e\u7cbe\u786e\u63a7\u5236 Pod \u8fd0\u884c\u5728\u67d0\u4e2a\u4e3b\u673a\u4e0a\u8981\u91cd\u8981\u5f97\u591a\u3002 \u9700\u8981 Pod \u526f\u672c\u603b\u662f\u8fd0\u884c\u5728\u5168\u90e8\u6216\u7279\u5b9a\u4e3b\u673a\u4e0a\uff0c\u5e76\u9700\u8981\u5148\u4e8e\u5176\u4ed6 Pod \u542f\u52a8\uff0c\u5f53\u8fd9\u88ab\u8ba4\u4e3a\u975e\u5e38\u91cd\u8981\u65f6\uff0c\u5e94\u8be5\u4f7f\u7528 Daemon Controller\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>DaemonSet DaemonSet\u00a0\u786e\u4fdd\u5168\u90e8\uff08\u6216\u8005\u67d0\u4e9b\uff09\u8282\u70b9\u4e0a\u8fd0\u884c\u4e00\u4e2a Pod \u7684\u526f\u672c\u3002\u5f53\u6709\u8282\u70b9\u52a0\u5165\u96c6\u7fa4\u65f6 &hellip;<\/p>\n<p class=\"read-more\"> <a class=\"\" href=\"http:\/\/www.weijing.co\/?p=1736\"> <span class=\"screen-reader-text\">kubernetes DaemonSet<\/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":"DaemonSet DaemonSet\u00a0\u786e\u4fdd\u5168\u90e8\uff08\u6216\u8005\u67d0\u4e9b\uff09\u8282\u70b9\u4e0a\u8fd0\u884c\u4e00\u4e2a Pod \u7684\u526f\u672c\u3002\u5f53\u6709\u8282\u70b9\u52a0\u5165\u96c6\u7fa4\u65f6&hellip;","_links":{"self":[{"href":"http:\/\/www.weijing.co\/index.php?rest_route=\/wp\/v2\/posts\/1736"}],"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=1736"}],"version-history":[{"count":0,"href":"http:\/\/www.weijing.co\/index.php?rest_route=\/wp\/v2\/posts\/1736\/revisions"}],"wp:attachment":[{"href":"http:\/\/www.weijing.co\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1736"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.weijing.co\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1736"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.weijing.co\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1736"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}