Kubernetes 部署 Metrics Server 获取集群指标数据

如果出现下面的错误： no metrics known for pod  请按照本文的方法重新安装，可能/deploy/1.8+ 文件没有修改出现问题

unable to fetch node metrics for node "k8s": no metrics known for node
E0703 14:52:39.716521       1 reststorage.go:160] unable to fetch pod metrics for pod kube-system/coredns-66bff467f8-b6mnm: no metrics known for pod
E0703 14:52:39.716543       1 reststorage.go:160] unable to fetch pod metrics for pod kube-system/kube-scheduler-k8s3: no metrics known for pod
E0703 14:52:39.716548       1 reststorage.go:160] unable to fetch pod metrics for pod kube-system/kube-controller-manager-k8s3: no metrics known for pod
E0703 14:52:39.716552       1 reststorage.go:160] unable to fetch pod metrics for pod kube-system/calico-node-67pwg: no metrics known for pod
E0703 14:52:39.716555       1 reststorage.go:160] unable to fetch pod metrics for pod kubernetes-dashboard/kubernetes-dashboard-5585794759-w7qgt: no metrics known for pod
E0703 14:52:39.716559       1 reststorage.go:160] unable to fetch pod metrics for pod kube-system/etcd-k8s3: no metrics known for pod
E0703 14:52:39.716563       1 reststorage.go:160] unable to fetch pod metrics for pod kube-system/kube-apiserver-k8s3: no metrics known for pod
E0703 14:52:39.716566       1 reststorage.go:160] unable to fetch pod metrics for pod kube-system/calico-kube-controllers-58b656d69f-98xk2: no metrics known for pod
E0703 14:52:39.716570       1 reststorage.go:160] unable to fetch pod metrics for pod kube-system/coredns-66bff467f8-7jrq5: no metrics known for pod
E0703 14:52:39.716573       1 reststorage.go:160] unable to fetch pod metrics for pod kube-system/kube-proxy-r8l7n: no metrics known for pod
E0703 14:52:39.716576       1 reststorage.go:160] unable to fetch pod metrics for pod kubernetes-dashboard/dashboard-metrics-scraper-6b4884c9d5-j8hfs: no metrics known for pod
E0703 14:52:39.716580       1 reststorage.go:160] unable to fetch pod metrics for pod kube-system/metrics-server-59f947bc97-fh8ss: no metrics known for pod

参考：https://github.com/kubernetes-sigs/metrics-server

安装版本信息：

• Kubernetes 版本：1.18.0
• Metrics Server 版本：0.3.6

 创建文件metrics-server.yaml 并复制下面的内容到文件中。 

kubectl apply -f  metrics-server.yaml

github上的下载的目 /root/k8s3/metrics-server/deploy/1.8+ 下面有多个文件，下面的文件是这几个文件的组合，这是稍微修改一点内容：（修改部分有注释）

## ServiceAccount
apiVersion: v1
kind: ServiceAccount
metadata:name: metrics-servernamespace: kube-system
---
## ClusterRole aggregated-metrics-reader
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRol
metadata:name: system:aggregated-metrics-readerlabels:rbac.authorization.k8s.io/aggregate-to-view: "true"rbac.authorization.k8s.io/aggregate-to-edit: "true"rbac.authorization.k8s.io/aggregate-to-admin: "true"
rules:
- apiGroups: ["metrics.k8s.io"]resources: ["pods","nodes"]verbs: ["get","list","watch"]
---
## ClusterRole metrics-server
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:name: system:metrics-server
rules:
- apiGroups: [""]resources: ["pods","nodes","nodes/stats","namespaces","configmaps"]verbs: ["get","list","watch"]
---
## ClusterRoleBinding auth-delegator
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:name: metrics-server:system:auth-delegator
roleRef:apiGroup: rbac.authorization.k8s.iokind: ClusterRolename: system:auth-delegator
subjects:
- kind: ServiceAccountname: metrics-servernamespace: kube-system
---
## RoleBinding metrics-server-auth-reader
apiVersion: rbac.authorization.k8s.io/v1
kind: RoleBinding
metadata:name: metrics-server-auth-readernamespace: kube-system
roleRef:apiGroup: rbac.authorization.k8s.iokind: Rolename: extension-apiserver-authentication-reader
subjects:
- kind: ServiceAccountname: metrics-servernamespace: kube-system
---
## ClusterRoleBinding system:metrics-server
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:name: system:metrics-server
roleRef:apiGroup: rbac.authorization.k8s.iokind: ClusterRolename: system:metrics-server
subjects:
- kind: ServiceAccountname: metrics-servernamespace: kube-system## APIService
---
apiVersion: apiregistration.k8s.io/v1beta1
kind: APIService
metadata:name: v1beta1.metrics.k8s.io
spec:service:name: metrics-servernamespace: kube-systemgroup: metrics.k8s.ioversion: v1beta1insecureSkipTLSVerify: truegroupPriorityMinimum: 100versionPriority: 100## Service
---
apiVersion: v1
kind: Service
metadata:name: metrics-servernamespace: kube-systemlabels:kubernetes.io/name: "Metrics-server"kubernetes.io/cluster-service: "true"
spec:selector:k8s-app: metrics-serverports:- port: 443targetPort: 4443
---
## Deployment
apiVersion: apps/v1
kind: Deployment
metadata:name: metrics-servernamespace: kube-systemlabels:k8s-app: metrics-server
spec:selector:matchLabels:k8s-app: metrics-servertemplate:metadata:name: metrics-serverlabels:k8s-app: metrics-serverspec:hostNetwork: trueserviceAccountName: metrics-servercontainers:- name: metrics-server## 修改镜像源地址image: registry.aliyuncs.com/google_containers/metrics-server-amd64:v0.3.6imagePullPolicy: IfNotPresentargs:- --cert-dir=/tmp- --secure-port=4443- --kubelet-insecure-tls  ## 增加- --kubelet-preferred-address-types=InternalDNS,InternalIP,ExternalDNS,ExternalIP,Hostname ## 增加ports:- name: main-portcontainerPort: 4443protocol: TCPsecurityContext:readOnlyRootFilesystem: truerunAsNonRoot: truerunAsUser: 1000resources:limits:memory: 1Gicpu: 1000mrequests:memory: 1Gicpu: 1000mvolumeMounts:- name: tmp-dirmountPath: /tmp- name: localtimereadOnly: truemountPath: /etc/localtimevolumes:- name: tmp-diremptyDir: {}- name: localtimehostPath:type: Filepath: /etc/localtimenodeSelector:kubernetes.io/os: linuxkubernetes.io/arch: "amd64"

本文来自互联网用户投稿，文章观点仅代表作者本人，不代表本站立场，不承担相关法律责任。如若转载，请注明出处。 如若内容造成侵权/违法违规/事实不符，请点击【内容举报】进行投诉反馈！