{"id":139,"date":"2021-03-11T11:19:00","date_gmt":"2021-03-11T03:19:00","guid":{"rendered":"\/?p=139"},"modified":"2021-03-11T11:19:01","modified_gmt":"2021-03-11T03:19:01","slug":"18-daemonset-%e5%ae%88%e6%8a%a4%e5%ae%b9%e5%99%a8","status":"publish","type":"post","link":"http:\/\/xinblog.ltd\/?p=139","title":{"rendered":"18.DaemonSet \u5b88\u62a4\u5bb9\u5668"},"content":{"rendered":"

\u6211\u4eec\u8bf4\u4e86\u5982\u4f55\u4f7f\u7528StatefulSet\u7f16\u6392\u6709\u72b6\u6001\u5bb9\u5668,StatefulSet\u5176\u5b9e\u5c31\u662f\u5bf9\u5178\u578b\u8fd0\u7ef4\u4e1a\u52a1\u7684\u5bb9\u5668\u5316\u62bd\u8c61,\u5728\u4e0d\u4f7f\u7528\u5bb9\u5668\u7684\u60c5\u51b5\u4e0b,\u4e5f\u80fd\u81ea\u5df1\u53bbDIY\u4e00\u4e2a\u7c7b\u4f3c\u7684\u65b9\u6848,\u4f46\u662f\u4e00\u65e6\u6d89\u53ca\u5230\u4e86\u5347\u7ea7,\u7248\u672c\u63a7\u5236,Kubernetes\u53ef\u4ee5\u7a81\u51fa\u8fd9\u4e2a\u597d\u5904<\/p>\n

\u6bd4\u5982,\u5bf9StatefulSet\u8fdb\u884c\u6eda\u52a8\u66f4\u65b0,\u5176\u5b9e,\u53ea\u9700\u8981\u4fee\u6539StatefulSet\u7684Pod\u6a21\u677f,\u5c31\u80fd\u81ea\u52a8\u89e6\u53d1\u6eda\u52a8\u5347\u7ea7<\/p>\n

$ kubectl patch statefulset mysql –type=’json’ -p='[{“op”: “replace”, “path”: “\/spec\/template\/spec\/containers\/0\/image”, “value”:”mysql:5.7.23″}]’<\/p>\n

statefulset.apps\/mysql patched<\/p>\n

\u4f7f\u7528\u4e86kubectl patch\u547d\u4ee4,\u4ee5\u6253\u8865\u4e01\u7684\u65b9\u5f0f,\u4fee\u6539API\u5bf9\u8c61\u7684\u6307\u5b9a\u5b57\u6bb5,\u5c31\u662f\u540e\u9762\u6307\u5b9a\u7684<\/p>\n

\/spec\/template\/spec\/containers\/0\/image<\/p>\n

\u8fd9\u6837,StatefulSet Controller\u5c31\u4f1a\u6309\u7167\u548cPod\u7f16\u53f7\u76f8\u53cd\u7684\u987a\u5e8f,\u4ece\u6700\u540e\u4e00\u4e2aPod\u5f00\u59cb,\u9010\u6b65\u66f4\u65b0\u8fd9\u4e2aStatefulSet\u7ba1\u7406\u7684\u6bcf\u4e00\u4e2aPod,\u5982\u679c\u53d1\u751f\u4e86\u9519\u8bef,\u8fd9\u6b21\u6eda\u52a8\u66f4\u65b0\u5c31\u4f1a\u505c\u6b62,\u800c\u4e14,\u8fd9\u79cd\u6eda\u52a8\u66f4\u65b0\u7684\u65b9\u5f0f,\u8fd8\u652f\u6301\u7ec6\u7c92\u5ea6\u7684\u533a\u5206,\u6bd4\u5982\u91d1\u4e1d\u96c0\u53d1\u5e03\u6216\u8005\u7070\u5ea6\u53d1\u5e03,\u5e94\u7528\u4e2d\u591a\u4e2a\u5b9e\u4f8b\u4e2d\u6307\u5b9a\u7684\u4e00\u90e8\u5206\u66f4\u65b0,\u6216\u8005\u6307\u5b9a\u7684\u4e00\u90e8\u5206\u4e0d\u66f4\u65b0<\/p>\n

\u8fd9\u4e2a\u5b57\u6bb5\u662f<\/p>\n

statefulSet\u7684spec.updateStrategy.rollingUpdate\u7684Partition\u5b57\u6bb5<\/p>\n

\u6211\u4eec\u518d\u6253\u4e00\u4e2a\u8865\u4e01<\/p>\n

$ kubectl patch statefulset mysql -p ‘{“spec”:{“updateStrategy”:{“type”:”RollingUpdate”,”rollingUpdate”:{“partition”:2}}}}’<\/p>\n

statefulset.apps\/mysql patched<\/p>\n

kubectl patch\u547d\u4ee4\u540e\u9762\u7684\u53c2\u6570,\u5c31\u662fPartition\u5b57\u6bb5\u5728API\u5bf9\u8c61\u4e2d\u7684\u8def\u5f84,\u4e0a\u8ff0\u64cd\u4f5c\u7b49\u4e8e\u662f\u5c06\u8fd9\u4e2arollingUpdate\u5b57\u6bb5\u4fee\u6539\u4e3a\u4e862<\/p>\n

\u8fd9\u6837,\u5728\u955c\u50cf\u53d1\u751f\u4e86\u6539\u53d8,\u6bd4\u5982\u66f4\u65b0\u4e3a\u4e865.7.23,\u90a3\u4e48\u53ea\u6709\u5e8f\u53f7\u5927\u4e8e\u7b49\u4e8e2\u7684Pod\u4f1a\u88ab\u66f4\u65b0\u5230\u8fd9\u4e2a\u7248\u672c,\u5e76\u4e14\u5220\u9664\u6216\u8005\u91cd\u542f\u4e86\u5c0f\u4e8e\u7b49\u4e8e2\u7684Pod,\u518d\u6b21\u91cd\u542f,\u4e5f\u4e0d\u4f1a\u88ab\u5347\u7ea7\u4e3a\u65b0\u7684\u955c\u50cf<\/p>\n

\u4f46\u662fStatefulSet\u4e0d\u4ec5\u5982\u6b64,\u5728\u5176\u4e2d\u8fd8\u6709\u4e00\u4e2a\u53d8\u79cdDaemonSet,\u5728Kubernetes\u4e2d,\u8fd0\u884c\u4e00\u4e2aDaemon Pod\u4f5c\u4e3a\u5b88\u62a4Pod<\/p>\n

\u5177\u4f53\u5173\u4e8eDaemonSet\u7684\u4f5c\u7528,\u662f\u5728Kubernetes\u96c6\u7fa4\u4e2d,\u8fd0\u884c\u4e00\u4e2aDaemon Pod<\/p>\n

\u8fd9\u4e2aPod\u5462,\u53ef\u4ee5\u8fd0\u884c\u5728Kubernetes\u96c6\u7fa4\u4e2d\u6bcf\u4e00\u4e2a\u8282\u70b9\u4e0a<\/p>\n

\u6bcf\u4e00\u4e2a\u8282\u70b9\u4e0a\u5462,\u6709\u4e14\u53ea\u6709\u4e00\u4e2a\u8fd9\u6837\u7684Pod\u5b9e\u4f8b<\/p>\n

\u6bcf\u5f53\u6709\u65b0\u7684\u8282\u70b9\u52a0\u5165Kuberentes\u96c6\u7fa4\u65f6\u5019,\u8fd9\u4e2aPod\u4f1a\u7acb\u523b\u5728\u8fd9\u4e2a\u65b0\u7684\u8282\u70b9\u4e0a\u88ab\u521b\u5efa\u51fa\u6765,\u65e7\u7684\u8282\u70b9\u5220\u9664\u7684\u65f6\u5019,\u4e0a\u9762\u7684Pod\u4e5f\u4f1a\u88ab\u7acb\u523b\u56de\u6536\u6389<\/p>\n

\u5e38\u89c1\u7684\u9700\u8981\u7528\u5230Daemon Pod\u7684\u5730\u65b9\u53c8<\/p>\n

1.\u5404\u79cd\u7f51\u7edc\u63d2\u4ef6\u7684Agent\u7ec4\u4ef6,\u5fc5\u987b\u8981\u5728\u6bcf\u4e00\u4e2a\u8282\u70b9\u4e0a,\u5904\u7406\u8fd9\u4e2a\u8282\u70b9\u4e0a\u7684\u5bb9\u5668\u7f51\u7edc<\/p>\n

2.\u5b58\u50a8\u7684\u63d2\u4ef6,\u5fc5\u987b\u8fd0\u884c\u5728\u6bcf\u4e00\u4e2a\u8282\u70b9\u4e0a,\u7528\u6765\u6302\u8f7d\u5bb9\u5668\u7684Volume\u76ee\u5f55<\/p>\n

3.\u5404\u79cd\u76d1\u63a7\u548c\u65e5\u5fd7\u7ec4\u4ef6,\u8fd0\u884c\u5728\u6bcf\u4e00\u4e2a\u8282\u70b9\u4e0a,\u8d1f\u8d23\u8282\u70b9\u4e0a\u7684\u76d1\u63a7\u4fe1\u606f\u548c\u65e5\u5fd7\u641c\u96c6<\/p>\n

\u800c\u4e14,\u548c\u5f88\u591a\u7f16\u6392\u5bf9\u8c61\u4e0d\u4e00\u6837,DaemonSet\u8fd0\u884c\u65f6\u673a,\u6bd4Kubernetes\u96c6\u7fa4\u4e2d\u8282\u70b9\u4e0a\u7ebf\u7684\u65f6\u673a\u90fd\u8981\u65e9<\/p>\n

\u8fd9\u662f\u56e0\u4e3aDaemonSet\u53ef\u80fd\u662f\u7f51\u7edc\u63d2\u4ef6,\u5982\u679c\u8fd9\u4e2a\u4e0d\u5148\u8fdb\u884c\u8fd0\u884c,\u90a3\u4e48\u53ef\u80fd\u5c31\u5bfc\u81f4\u6574\u4e2a\u96c6\u7fa4\u7684\u4e0d\u53ef\u7528<\/p>\n

\u6240\u4ee5DaemonSet\u7684\u8bbe\u8ba1,\u5fc5\u7136\u5b58\u5728\u7740\u67d0\u79cd\u8fc7\u4eba\u4e4b\u5904<\/p>\n

\u6211\u4eec\u5148\u770b\u4e00\u4e0bAPI\u7684\u5b9a\u4e49<\/p>\n\n\n\n
apiVersion: apps\/v1<\/p>\n

kind: DaemonSet<\/p>\n

metadata:<\/p>\n

name: fluentd-elasticsearch<\/p>\n

namespace: kube-system<\/p>\n

labels:<\/p>\n

k8s-app: fluentd-logging<\/p>\n

spec:<\/p>\n

selector:<\/p>\n

matchLabels:<\/p>\n

name: fluentd-elasticsearch<\/p>\n

template:<\/p>\n

metadata:<\/p>\n

labels:<\/p>\n

name: fluentd-elasticsearch<\/p>\n

spec:<\/p>\n

tolerations:<\/p>\n

– key: node-role.kubernetes.io\/master<\/p>\n

effect: NoSchedule<\/p>\n

containers:<\/p>\n

– name: fluentd-elasticsearch<\/p>\n

image: k8s.gcr.io\/fluentd-elasticsearch:1.20<\/p>\n

resources:<\/p>\n

limits:<\/p>\n

memory: 200Mi<\/p>\n

requests:<\/p>\n

cpu: 100m<\/p>\n

memory: 200Mi<\/p>\n

volumeMounts:<\/p>\n

– name: varlog<\/p>\n

mountPath: \/var\/log<\/p>\n

– name: varlibdockercontainers<\/p>\n

mountPath: \/var\/lib\/docker\/containers<\/p>\n

readOnly: true<\/p>\n

terminationGracePeriodSeconds: 30<\/p>\n

volumes:<\/p>\n

– name: varlog<\/p>\n

hostPath:<\/p>\n

path: \/var\/log<\/p>\n

– name: varlibdockercontainers<\/p>\n

hostPath:<\/p>\n

path: \/var\/lib\/docker\/containers<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u8fd9\u4e2aDaemonSet,\u7ba1\u7406\u7684\u662f\u4e00\u4e2afluented-elasticsearch\u955c\u50cf\u7684Pod,\u955c\u50cf\u7684\u529f\u80fd\u975e\u5e38\u5b9e\u7528,\u901a\u8fc7fluented\u5c06Docker\u5bb9\u5668\u7684\u65e5\u5fd7\u8f6c\u53d1\u7ed9ElasticSearch\u4e2d<\/p>\n

\u800c\u4e14DaemonSet\u548cDeployment\u975e\u5e38\u7c7b\u4f3c,\u4e0d\u8fc7\u6ca1\u6709replicas\u5b57\u6bb5,\u540c\u6837\u4f7f\u7528\u4e86selector\u9009\u62e9\u7ba1\u7406\u4e86\u6240\u6709\u5e26\u6709name=fluented-elasticsearch\u6807\u7b7e\u7684Pod<\/p>\n

\u8fd9\u4e9bPod\u6a21\u677f,\u4e5f\u662f\u5229\u7528\u4e86template\u5b57\u6bb5,\u5728\u8fd9\u4e2a\u5b57\u6bb5\u4e2d,\u4f7f\u7528\u4e86\u4e00\u4e2afluentd-elasticsearch:1.20\u7684\u955c\u50cf,\u5206\u522b\u5bf9\u5e94\u6302\u8f7d\u4e86\u5bbf\u4e3b\u673a\u7684\/var\/log\u548c\/var\/lib\/docker\/containers\u76ee\u5f55<\/p>\n

\u663e\u7136,fluentd\u542f\u52a8\u540e,\u4f1a\u4ece\u8fd9\u4e24\u4e2a\u76ee\u5f55\u4e2d\u641c\u96c6\u65e5\u5fd7,\u5e76\u53d1\u9001\u7ed9ElasticSearch\u6765\u4fdd\u5b58<\/p>\n

\u800c\u4e0a\u9762\u6302\u8f7d\u7684\u76ee\u5f55,\u6b63\u5f0fDocker\u5bb9\u5668\u4e2d\u5e94\u7528\u7684\u65e5\u5fd7,\u4fdd\u5b58\u5728\u4e86\/var\/lib\/docker\/containers\/{{.\u5bb9\u5668ID}}\/{{.\u5bb9\u5668ID}}-json.log\u6587\u4ef6\u4e2d,\u6b63\u662ffluentd\u7684\u641c\u96c6\u76ee\u6807<\/p>\n

\u63a5\u4e0b\u6765,\u5c31\u662fDaemonSet\u5982\u4f55\u4fdd\u8bc1\u6bcf\u4e2aNode\u4e0a\u6709\u4e14\u53ea\u6709\u4e00\u4e2a\u88ab\u7ba1\u7406\u7684Pod\u7684\u5462?<\/p>\n

\u8fd9\u662f\u4e00\u4e2a\u5178\u578b\u7684\u63a7\u5236\u5668\u9762\u6a21\u578b\u80fd\u591f\u5904\u7406\u7684\u95ee\u9898<\/p>\n

DaemonSet Controller\u5f53\u4e2d,\u4eceEtcd\u83b7\u53d6\u5230\u6240\u6709\u7684Node,\u7136\u540e\u904d\u5386\u6240\u6709\u7684Node,\u4ece\u6bcf\u4e2aNode\u4e2d\u68c0\u67e5\u662f\u4e0d\u662f\u643a\u5e26\u4e86\u4e00\u4e2aname=fluentd-elasicsearch\u6807\u7b7e\u7684Pod\u5728\u8fd0\u884c<\/p>\n

\u5982\u679c\u51fa\u73b0\u4e86\u6ca1\u6709<\/p>\n

\u90a3\u4e48\u5c31\u9700\u8981\u521b\u5efa\u4e00\u4e2a\u8fd9\u6837\u7684Pod<\/p>\n

\u6709\u8fd9\u6837\u7684Pod,\u4f46\u662f\u6570\u91cf\u5927\u4e8e1,\u5c31\u8bf4\u660e\u8981\u5c06\u591a\u4f59\u7684Pod\u8fdb\u884c\u5220\u9664<\/p>\n

\u5982\u679c\u6709\u4e14\u53ea\u6709\u4e00\u4e2a,\u90a3\u4e48\u8bf4\u660e\u6ca1\u95ee\u9898<\/p>\n

\u90a3\u4e48\u5982\u4f55\u53bb\u521b\u5efa\u8fd9\u6837\u7684Pod,\u5728\u4e00\u4e2a\u6307\u5b9a\u7684Node\u4e0a<\/p>\n

\u53ef\u4ee5\u4f7f\u7528nodeSelector,\u6307\u5b9aNode\u540d\u5b57\u5c31\u53ef\u4ee5\u4e86<\/p>\n

\u4e0d\u8fc7,\u5728Kubernetes\u9879\u76ee\u4e2d,nodeSelector\u662f\u4e00\u4e2a\u5c06\u8981\u5e9f\u5f03\u7684\u5b57\u6bb5\u4e86,\u73b0\u5728\u63d0\u5021\u4f7f\u7528\u7684,\u662fnodeAffiniy,\u4e3e\u4e2a\u4f8b\u5b50<\/p>\n\n\n\n
apiVersion: v1<\/p>\n

kind: Pod<\/p>\n

metadata:<\/p>\n

name: with-node-affinity<\/p>\n

spec:<\/p>\n

affinity:<\/p>\n

nodeAffinity:<\/p>\n

requiredDuringSchedulingIgnoredDuringExecution:<\/p>\n

nodeSelectorTerms:<\/p>\n

– matchExpressions:<\/p>\n

– key: metadata.name<\/p>\n

operator: In<\/p>\n

values:<\/p>\n

– node-geektime<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u5728\u8fd9\u4e2aPod\u4e2d,\u6211\u4eec\u5b9a\u4e49\u4e86\u4e00\u4e2aspec.affinity\u5b57\u6bb5,\u5b9a\u4e49\u4e86\u4e00\u4e2anodeAffinity,\u5176\u4e2d\u542b\u4e49\u4e3arequiredDuringSchedulingIgnoredDuringExecution,\u610f\u5473\u7740,\u8fd9\u4e2anodeAffinity\u5fc5\u987b\u5728\u6bcf\u6b21\u8c03\u5ea6\u7684\u65f6\u5019\u90fd\u7ed9\u4e0e\u8003\u8651,\u540c\u65f6\u610f\u5473\u7740,\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\u4e0d\u8003\u8651\u8fd9\u4e2anodeAffinity<\/p>\n

\u800c\u4e14,nodeAffinity\u7684\u5b9a\u4e49\u4e2d,\u652f\u6301\u4e86\u66f4\u591a\u66f4\u52a0\u4e30\u5bcc\u7684\u8bed\u6cd5,\u6bd4\u5982operator:In \u8bf4\u660e\u662f\u90e8\u5206\u5339\u914d,\u5982\u679c\u5b9a\u4e49\u4e86operator:Equal,\u8bf4\u660e\u662f\u5b8c\u5168\u5339\u914d,\u90a3\u4e48\u8fd9\u4e2a\u5c31\u662f\u53ef\u4ee5\u8fd0\u884c\u5728metadata.name\u4e3anode-geektime\u7684\u8282\u70b9\u4e0a<\/p>\n

DaemonSet Controller\u5728\u521b\u5efaPod\u7684\u65f6\u5019,\u4f1a\u81ea\u52a8\u5728\u8fd9\u4e2aPod\u7684API\u5bf9\u8c61\u4e2d,\u52a0\u4e0a\u4e00\u4e2a\u8fd9\u4e2a\u7684nodeAffinity,\u7ed1\u5b9a\u7684value,\u6b63\u662f\u8fd9\u4e2aNode<\/p>\n

\u800c\u4e14DaemonSet\u8fd8\u4f1a\u7ed9\u8fd9\u4e2apod\u81ea\u52a8\u52a0\u4e0a\u53e6\u4e00\u4e2a\u548c\u8c03\u5ea6\u76f8\u5173\u7684\u5b57\u6bb5,\u53eb\u505atolerations,\u8fd9\u4e2a\u5b57\u6bb5\u610f\u5473\u7740\u8fd9\u4e2aPod,\u4f1a\u5bb9\u5fcd\u67d0\u4e9bNode\u7684\u6c61\u70b9<\/p>\n

\u81ea\u52a8\u52a0\u4e0a\u7684tolerations\u5b57\u6bb5,\u683c\u5f0f\u5982\u4e0b<\/p>\n

spec:<\/p>\n

tolerations:<\/p>\n

– key: node.kubernetes.io\/unschedulable<\/p>\n

operator: Exists<\/p>\n

effect: NoSchedule<\/p>\n

\u8fd9\u4e2aToleration\u7684\u542b\u4e49,\u662f\u6240\u6709\u88ab\u6807\u8bb0\u4e3aunschedulable\u7684\u6c61\u70b9\u7684Node,\u90fd\u53ef\u4ee5\u88ab\u5bb9\u5fcd,\u4e00\u822c\u60c5\u51b5\u4e0b,\u88ab\u6807\u8bb0\u4e86unshedulabel\u6c61\u70b9\u7684Node,\u662f\u4e0d\u4f1a\u6709\u4efb\u4f55Pod\u88ab\u8c03\u5ea6\u4e0a\u53bb\u7684,\u53ef\u662fDaemonSet\u81ea\u52a8\u7684\u7ed9\u88ab\u7ba1\u7406\u7684Pod\u52a0\u4e0a\u4e86\u8fd9\u4e2aToleration,\u8ba9\u5176\u53ef\u4ee5\u65e0\u89c6\u6c61\u70b9\u7684\u9650\u5236,\u4fdd\u8bc1\u6bcf\u4e2a\u8282\u70b9\u4e0a\u90fd\u6709\u5bf9\u5e94\u7684Pod<\/p>\n

\u800c\u4e14,\u5982\u679cDaemonSet\u7ba1\u7406\u7684,\u662f\u4e00\u4e2a\u7f51\u7edc\u63d2\u4ef6Agent Pod,\u8fd8\u9700\u8981\u5728\u8fd9\u4e2aDaemonSet\u7684YAML\u6587\u4ef6\u4e2d,\u7ed9\u5176Pod\u6a21\u677f\u52a0\u4e0a\u4e00\u4e2a\u80fd\u591f\u5bb9\u5fcd node.kubernetes.io\/network-unavailable\u7684\u6c61\u70b9\u7684Toleration<\/p>\n

\u800c\u5728kubernetes\u4e2d\u96c6\u7fa4\u4e2d,\u5982\u679c\u4e00\u4e2a\u8282\u70b9\u7684\u7f51\u7edc\u63d2\u4ef6\u8fd8\u6ca1\u6709\u5b89\u88c5,\u90a3\u4e48\u8fd9\u4e2a\u8282\u70b9\u4f1a\u88ab\u52a0\u4e0a\u540d\u4e3anode.kubnetes.io\/network-unavailable\u7684\u6c61\u70b9<\/p>\n

\u8fd9\u79cd\u673a\u5236,\u5c31\u662f\u6211\u4eec\u518d\u90e8\u7f72Kubernetes\u96c6\u7fa4\u7684\u65f6\u5019,\u80fd\u591f\u5148\u90e8\u7f72Kubernetes,\u540e\u90e8\u7f72\u7f51\u7edc\u63d2\u4ef6\u7684\u6839\u672c\u539f\u56e0,\u6240\u4ee5,\u6211\u4eec\u521b\u5efa\u7684Weave\u7684YAML,\u5b9e\u9645\u4e0a\u5c31\u662f\u4e00\u4e2aDaemonSet<\/p>\n

\u6240\u4ee5DaemonSet\u672c\u8d28\u4e0a\u662f\u4e00\u4e2a\u65e0\u72b6\u6001\u7684\u7b80\u5355\u7684\u63a7\u5236\u5668,\u518d\u5176\u63a7\u5236\u5faa\u73af\u4e2d,\u53ea\u9700\u8981\u904d\u5386\u6240\u6709\u7684\u8282\u70b9,\u7136\u540e\u6839\u636e\u8282\u70b9\u4e0a\u662f\u5426\u6709\u7ba1\u7406\u7684Pod\u7684\u60c5\u51b5,\u6765\u51b3\u5b9a\u662f\u5426\u521b\u5efa\u6216\u8005\u5220\u9664\u4e00\u4e2aPod<\/p>\n

\u4e0d\u8fc7\u5728\u521b\u5efa\u6bcf\u4e00\u4e2aPod\u7684\u65f6\u5019,DaemonSet\u4f1a\u81ea\u52a8\u7ed9\u6bcf\u4e2aPod\u52a0\u4e0a\u4e00\u4e2anodeAffinity,\u4ece\u800c\u4fdd\u8bc1Pod\u5728\u6307\u5b9anode\u4e0a\u542f\u52a8<\/p>\n

\u8fd8\u4f1a\u7ed9Pod\u52a0\u4e0aToleration,\u4ece\u800c\u5ffd\u7565\u8282\u70b9\u7684unschedulable\u6c61\u70b9<\/p>\n

\u800c\u4e14,\u8fd8\u80fd\u6709\u591a\u79cd\u7684Toleration,\u6765\u5e2e\u52a9\u5b8c\u6210\u5bf9\u5e94\u7684\u76ee\u7684,\u6bd4\u5982\u4e0b\u9762\u7684tolerations<\/p>\n

tolerations:<\/p>\n

– key: node-role.kubernetes.io\/master<\/p>\n

effect: NoSchedule<\/p>\n

\u5c31\u53ef\u4ee5\u5728Master\u8282\u70b9\u4e0a\u90e8\u7f72\u8fd9\u4e2aDaemonSet\u7684Pod<\/p>\n

\u7136\u540e,\u6211\u4eec\u770b\u4e0bDaemonSet\u6574\u4f53\u7684\u64cd\u4f5c\u6d41\u7a0b<\/p>\n

\u4e00\u822c\u5728\u542f\u52a8\u8fd9\u4e2aDaemonSet\u5bf9\u8c61\u7684\u65f6\u5019,\u6211\u4eec\u90fd\u4f1a\u52a0\u4e0aresources\u5b57\u6bb5,\u9650\u5236\u5176CPU\u548c\u5185\u5b58\u4f7f\u7528,\u9632\u6b62\u5360\u7528\u8fc7\u591a\u7684\u5bbf\u4e3b\u673a\u8d44\u6e90<\/p>\n

\u6211\u4eec\u5728\u542f\u52a8\u5b8c\u6210\u540e.\u5229\u7528kubectl get \u6765\u67e5\u770b\u4e00\u4e0bKubenretes\u4e2d\u7684DaemonSet\u5bf9\u8c61<\/p>\n

$ kubectl get ds -n kube-system fluentd-elasticsearch<\/p>\n

NAME\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 DESIRED\u00a0 \u00a0CURRENT\u00a0 \u00a0READY\u00a0 \u00a0 \u00a0UP-TO-DATE\u00a0 \u00a0AVAILABLE\u00a0 \u00a0NODE SELECTOR\u00a0 \u00a0AGE<\/p>\n

fluentd-elasticsearch\u00a0 \u00a02\u00a0 \u00a0 \u00a0 \u00a0 \u00a02\u00a0 \u00a0 \u00a0 \u00a0 \u00a02\u00a0 \u00a0 \u00a0 \u00a0 \u00a02\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 2\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0<none>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 1h<\/p>\n

\u5728K8S\u4e2d,\u8f83\u957f\u7684API\u5bf9\u8c61\u90fd\u6709\u7b80\u5199,\u6bd4\u5982DaemonSet\u5bf9\u5e94\u7684\u662fds,Deployement\u5bf9\u5e94\u7684\u662fdeploy<\/p>\n

\u5728DaemonSet\u4e2d,\u4e5f\u4f1a\u6709\u7740\u50cfDESIRED CURRENT\u7b49\u591a\u4e2a\u72b6\u6001\u5b57\u6bb5,\u8bf4\u660e\u4e5f\u80fd\u8fdb\u884c\u7248\u672c\u7ba1\u7406<\/p>\n

\u6211\u4eec\u53ef\u4ee5\u5148\u8fdb\u884c\u66f4\u65b0\u8fd9\u4e2aDaemonSet\u7684\u5bb9\u5668\u53ca\u5f62\u8c61\u7248\u672c<\/p>\n

kubectl set image ds\/fluentd-elasticsearch fluentd-elasticsearch=k8s.gcr.io\/fluented-elasticsearch:v2.2.0 –record -n=kube-system<\/p>\n

\u7136\u540e,\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528kubectl rollout status\u547d\u4ee4\u770b\u5230\u6eda\u52a8\u66f4\u65b0\u7684\u8fc7\u7a0b<\/p>\n

$ kubectl rollout status ds\/fluentd-elasticsearch -n kube-system<\/p>\n

Waiting for daemon set “fluentd-elasticsearch” rollout to finish: 0 out of 2 new pods have been updated…<\/p>\n

Waiting for daemon set “fluentd-elasticsearch” rollout to finish: 0 out of 2 new pods have been updated…<\/p>\n

Waiting for daemon set “fluentd-elasticsearch” rollout to finish: 1 of 2 updated pods are available…<\/p>\n

daemon set “fluentd-elasticsearch” successfully rolled out<\/p>\n

\u7136\u540e,\u56e0\u4e3a,\u5728\u5347\u7ea7\u547d\u4ee4\u540e\u9762\u52a0\u4e0a\u4e86-record\u53c2\u6570,\u6240\u4ee5\u5347\u7ea7\u4f7f\u7528\u7684\u6307\u4ee4\u4f1a\u81ea\u52a8\u51fa\u73b0\u5728DaemonSet\u7684rollout history\u91cc\u9762<\/p>\n

$ kubectl rollout history daemonset fluentd-elasticsearch -n kube-system<\/p>\n

daemonsets “fluentd-elasticsearch”<\/p>\n

REVISION\u00a0 CHANGE-CAUSE<\/p>\n

1\u00a0 \u00a0 \u00a0 \u00a0 \u00a0<none><\/p>\n

2\u00a0 \u00a0 \u00a0 \u00a0 \u00a0kubectl set image ds\/fluentd-elasticsearch fluentd-elasticsearch=k8s.gcr.io\/fluentd-elasticsearch:v2.2.0 –namespace=kube-system –record=true<\/p>\n

\u6709\u4e86\u7248\u672c\u53f7,\u5c31\u53ef\u4ee5\u50cf\u662fDeployement\u4e00\u6837,\u5c06DaemonSet\u4e00\u6837\u56de\u6eda\u5230\u67d0\u4e2a\u6307\u5b9a\u7684\u5386\u53f2\u7248\u672c\u53ef<\/p>\n

\u90a3\u4e48\u5c31\u662f\u4e00\u4e2a\u95ee\u9898<\/p>\n

Deployment\u5229\u7528\u4e86RS\u8fdb\u884c\u7248\u672c\u7ba1\u7406<\/p>\n

\u90a3\u4e48ReplicaSet\u8fd9\u6837\u7684\u5bf9\u8c61,\u5229\u7528\u4e86\u4e0a\u9762\u8fdb\u884c\u7248\u672c\u7ef4\u62a4\u7684\u5462?\u6bd5\u7adfDaemonSet\u63a7\u5236\u5668\u5bf9\u5e94\u7684\u662fPod,\u4e0d\u53ef\u80fd\u6709RS\u8fd9\u6837\u7684\u5bf9\u8c61\u53c2\u4e0e\u5176\u4e2d<\/p>\n

\u4f46\u662fKubernetes\u4e5f\u6dfb\u52a0\u4e86\u4e00\u4e2aAPI\u5bf9\u8c61,\u540d\u4e3aControllerRevision,\u7528\u6765\u8bb0\u5f55\u67d0\u79cdController\u5bf9\u8c61\u7684\u7248\u672c<\/p>\n

\u6bd4\u5982\u67e5\u770bfluentd-elasticsearch\u5bf9\u5e94\u7684ControllerRevision<\/p>\n

$ kubectl get controllerrevision -n kube-system -l name=fluentd-elasticsearch<\/p>\n

NAME\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0CONTROLLER\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0REVISION\u00a0 \u00a0AGE<\/p>\n

fluentd-elasticsearch-64dc6799c9\u00a0 \u00a0daemonset.apps\/fluentd-elasticsearch\u00a0 \u00a02\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 1h<\/p>\n

\u7136\u540e\u53ef\u4ee5\u770b\u51fa\u6765\u5bf9\u5e94\u7684api\u5bf9\u8c61\u7684\u8be6\u60c5<\/p>\n\n\n\n
$ kubectl describe controllerrevision fluentd-elasticsearch-64dc6799c9 -n kube-system<\/p>\n

Name:\u00a0 \u00a0 \u00a0 \u00a0 \u00a0fluentd-elasticsearch-64dc6799c9<\/p>\n

Namespace:\u00a0 \u00a0 kube-system<\/p>\n

Labels:\u00a0 \u00a0 \u00a0 \u00a0controller-revision-hash=2087235575<\/p>\n

name=fluentd-elasticsearch<\/p>\n

Annotations:\u00a0 deprecated.daemonset.template.generation=2<\/p>\n

kubernetes.io\/change-cause=kubectl set image ds\/fluentd-elasticsearch fluentd-elasticsearch=k8s.gcr.io\/fluentd-elasticsearch:v2.2.0 –record=true –namespace=kube-system<\/p>\n

API Version:\u00a0 apps\/v1<\/p>\n

Data:<\/p>\n

Spec:<\/p>\n

Template:<\/p>\n

$ Patch:\u00a0 replace<\/p>\n

Metadata:<\/p>\n

Creation Timestamp:\u00a0 <nil><\/p>\n

Labels:<\/p>\n

Name:\u00a0 fluentd-elasticsearch<\/p>\n

Spec:<\/p>\n

Containers:<\/p>\n

Image:\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 k8s.gcr.io\/fluentd-elasticsearch:v2.2.0<\/p>\n

Image Pull Policy:\u00a0 IfNotPresent<\/p>\n

Name:\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0fluentd-elasticsearch<\/p>\n

…<\/p>\n

Revision:\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 2<\/p>\n

Events:\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 <none><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u8fd9\u4e2aControllerRevision\u5bf9\u8c61,\u5728Data\u5b57\u6bb5\u4e2d\u4fdd\u5b58\u4e86\u8fd9\u4e2a\u7248\u672c\u5bf9\u5e94\u7684\u5b8c\u6574\u7684DaemonSet\u7684API\u5bf9\u8c61,\u5e76\u4e14,\u5728Annotation\u5b57\u6bb5\u4fdd\u5b58\u4e86\u521b\u5efa\u8fd9\u4e2a\u5bf9\u8c61\u6240\u9700\u8981\u7684kubectl\u547d\u4ee4<\/p>\n

\u63a5\u4e0b\u6765,\u6211\u4eec\u5c1d\u8bd5\u5c06\u8fd9\u4e2aDaemonSet\u56de\u6eda\u5230Revision=1\u7684\u72b6\u6001<\/p>\n

$ kubectl rollout undo daemonset fluentd-elasticsearch –to-revision=1 -n kube-system<\/p>\n

daemonset.extensions\/fluentd-elasticsearch rolled back<\/p>\n

\u4f46\u662f\u5728\u6267\u884c\u5b8c\u6210\u56de\u6eda\u4e4b\u540e,DaemonSet\u7684Revision\u5e76\u4e0d\u4f1a\u4eceRevision=2\u56de\u6eda\u52301,\u800c\u662f\u589e\u52a0\u5230Revision=3,\u8fd9\u662f\u56e0\u4e3a,\u4e00\u4e2a\u65b0\u7684ControllerRevision\u88ab\u521b\u5efa\u4e86\u51fa\u6765<\/p>\n

\u90a3\u4e48\u5728\u672c\u7ae0\u4e2d,\u6211\u4eec\u4ecb\u7ecd\u4e86StatefulSet\u7684\u6eda\u52a8\u66f4\u65b0,<\/p>\n

\u7136\u540e\u662f\u4e00\u4e2a\u91cd\u70b9\u7684\u7f16\u6392\u5bf9\u8c61DaemonSet<\/p>\n

\u76f8\u6bd4\u8f83\u4e8eDeploymen,DaemonSet\u53ea\u7ba1\u7406Pod\u5bf9\u8c61,\u7136\u540e\u6839\u636enodeAffinity\u6765\u90e8\u7f72\u5728\u6307\u5b9a\u8282\u70b9<\/p>\n

\u5229\u7528Toleration\u6765\u63a7\u5236Pod\u6570\u91cf<\/p>\n

\u4e0e\u6b64\u540c\u65f6,DaemonSet\u4f7f\u7528ControllerRevision,\u6765\u4fdd\u5b58\u548c\u7ba1\u7406\u81ea\u5df1\u7684\u7248\u672c,\u8fd9\u79cd\u9762\u5411API\u5bf9\u8c61\u7684\u8bbe\u8ba1\u601d\u60f3,\u7b80\u5316\u4e86\u63a7\u5236\u5668\u672c\u8eab\u7684\u903b\u8f91,\u6b63\u662fKubernetes\u58f0\u660e\u5f0fAPI\u7684\u4f18\u52bf\u6240\u5728<\/p>\n

\u800c\u4e14,\u5728\u6574\u4e2aK8S\u4e2d,StatefulSet\u4e5f\u662f\u901a\u8fc7ControllerRevision\u8fdb\u884c\u7248\u672c\u63a7\u5236\u7684<\/p>\n

\u5229\u7528\u8fd9\u4e2aControllerRevision,\u907f\u514d\u4e86\u4e3a\u6bcf\u4e00\u79cd\u63a7\u5236\u5668\u7ef4\u62a4\u4e00\u5957\u5197\u4f59\u7684\u4ee3\u7801\u548c\u63a7\u5236\u95ee\u9898<\/p>\n

\u5728Kubernetes v1.11\u4e4b\u524d,DaemonSet\u7ba1\u7406\u7684Pod\u7684\u8c03\u5ea6\u6d41\u7a0b,\u5b9e\u9645\u4e0a\u662f\u7531DaemonSet Controller\u81ea\u5df1\u5b8c\u6210\u7684,\u4e3a\u4f55?<\/p>\n

\u67e5\u9605\u4e86Ds\u7528\u9ed8\u8ba4\u8c03\u5ea6\u5668\u4ee3\u66ffcontroller\u7684\u8bbe\u8ba1\u6587\u6863<\/p>\n

\u4e4b\u524d\u7684\u505a\u6cd5\u662f\uff1a<\/p>\n

controller\u5224\u65ad\u8c03\u5ea6\u8c13\u8bcd\uff0c\u7b26\u5408\u7684\u8bdd\u76f4\u63a5\u5728controller\u4e2d\u76f4\u63a5\u8bbe\u7f6espec.hostName\u53bb\u8c03\u5ea6\u3002<\/p>\n

\u76ee\u524d\u7684\u505a\u6cd5\u662f\uff1a<\/p>\n

controller\u4e0d\u518d\u5224\u65ad\u8c03\u5ea6\u6761\u4ef6\uff0c\u7ed9\u6bcf\u4e2apode\u8bbe\u7f6eNodeAffinity\u3002\u63a7\u5236\u5668\u6839\u636eNodeAffinity\u53bb\u68c0\u67e5\u6bcf\u4e2anode\u4e0a\u662f\u5426\u542f\u52a8\u4e86\u76f8\u5e94\u7684Pod\u3002\u5e76\u4e14\u53ef\u4ee5\u5229\u7528\u8c03\u5ea6\u4f18\u5148\u7ea7\u53bb\u4f18\u5148\u8c03\u5ea6\u5173\u952e\u7684ds pods\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

\u6211\u4eec\u8bf4\u4e86\u5982\u4f55\u4f7f\u7528Statefu […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[],"_links":{"self":[{"href":"http:\/\/xinblog.ltd\/index.php?rest_route=\/wp\/v2\/posts\/139"}],"collection":[{"href":"http:\/\/xinblog.ltd\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/xinblog.ltd\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/xinblog.ltd\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/xinblog.ltd\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=139"}],"version-history":[{"count":0,"href":"http:\/\/xinblog.ltd\/index.php?rest_route=\/wp\/v2\/posts\/139\/revisions"}],"wp:attachment":[{"href":"http:\/\/xinblog.ltd\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=139"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/xinblog.ltd\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=139"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/xinblog.ltd\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=139"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}