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-server
namespace: kube-system
---
## ClusterRole aggregated-metrics-reader
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRol
metadata:
name: system:aggregated-metrics-reader
labels:
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.io
kind: ClusterRole
name: system:auth-delegator
subjects:
- kind: ServiceAccount
name: metrics-server
namespace: kube-system
---
## RoleBinding metrics-server-auth-reader
apiVersion: rbac.authorization.k8s.io/v1
kind: RoleBinding
metadata:
name: metrics-server-auth-reader
namespace: kube-system
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: Role
name: extension-apiserver-authentication-reader
subjects:
- kind: ServiceAccount
name: metrics-server
namespace: kube-system
---
## ClusterRoleBinding system:metrics-server
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
name: system:metrics-server
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: system:metrics-server
subjects:
- kind: ServiceAccount
name: metrics-server
namespace: kube-system
## APIService
---
apiVersion: apiregistration.k8s.io/v1beta1
kind: APIService
metadata:
name: v1beta1.metrics.k8s.io
spec:
service:
name: metrics-server
namespace: kube-system
group: metrics.k8s.io
version: v1beta1
insecureSkipTLSVerify: true
groupPriorityMinimum: 100
versionPriority: 100
## Service
---
apiVersion: v1
kind: Service
metadata:
name: metrics-server
namespace: kube-system
labels:
kubernetes.io/name: "Metrics-server"
kubernetes.io/cluster-service: "true"
spec:
selector:
k8s-app: metrics-server
ports:
- port: 443
targetPort: 4443
---
## Deployment
apiVersion: apps/v1
kind: Deployment
metadata:
name: metrics-server
namespace: kube-system
labels:
k8s-app: metrics-server
spec:
selector:
matchLabels:
k8s-app: metrics-server
template:
metadata:
name: metrics-server
labels:
k8s-app: metrics-server
spec:
hostNetwork: true
serviceAccountName: metrics-server
containers:
- name: metrics-server
## 修改镜像源地址
image: registry.aliyuncs.com/google_containers/metrics-server-amd64:v0.3.6
imagePullPolicy: IfNotPresent
args:
- --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-port
containerPort: 4443
protocol: TCP
securityContext:
readOnlyRootFilesystem: true
runAsNonRoot: true
runAsUser: 1000
resources:
limits:
memory: 1Gi
cpu: 1000m
requests:
memory: 1Gi
cpu: 1000m
volumeMounts:
- name: tmp-dir
mountPath: /tmp
- name: localtime
readOnly: true
mountPath: /etc/localtime
volumes:
- name: tmp-dir
emptyDir: {}
- name: localtime
hostPath:
type: File
path: /etc/localtime
nodeSelector:
kubernetes.io/os: linux
kubernetes.io/arch: "amd64"
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