k8s部署metric-server单机、集群版

一、单机部署

1.1、下载metric-server

```

https://github.com/kubernetes-sigs/metrics-server/releases/latest/download/components.yaml

```

1.2、替换镜像并修改参数

```

...

spec:

containers:

args:
--cert-dir=/tmp
--secure-port=4443
--kubelet-insecure-tls # 1、不验证ca证书
--kubelet-preferred-address-types=InternalIP # 2、使用InternalIP
--kubelet-use-node-status-port
--metric-resolution=15s

image: guopengfee/metrics-server:v0.6.4 # 3、镜像地址

imagePullPolicy: IfNotPresent

livenessProbe:

...

```

1.3 完整配置文件"components.yaml"

```

apiVersion: v1

kind: ServiceAccount

metadata:

labels:

k8s-app: metrics-server

namespace: kube-system

apiVersion: rbac.authorization.k8s.io/v1

kind: ClusterRole

metadata:

labels:

k8s-app: metrics-server

rbac.authorization.k8s.io/aggregate-to-admin: "true"

rbac.authorization.k8s.io/aggregate-to-edit: "true"

rbac.authorization.k8s.io/aggregate-to-view: "true"

rules:

apiGroups:
metrics.k8s.io

resources:

pods
nodes

verbs:

get
list
watch

apiVersion: rbac.authorization.k8s.io/v1

kind: ClusterRole

metadata:

labels:

k8s-app: metrics-server

rules:

apiGroups:
""

resources:

nodes/metrics

verbs:

get
apiGroups:
""

resources:

pods
nodes

verbs:

get
list
watch

apiVersion: rbac.authorization.k8s.io/v1

kind: RoleBinding

metadata:

labels:

k8s-app: metrics-server

namespace: kube-system

roleRef:

apiGroup: rbac.authorization.k8s.io

kind: Role

subjects:

kind: ServiceAccount

namespace: kube-system

apiVersion: rbac.authorization.k8s.io/v1

kind: ClusterRoleBinding

metadata:

labels:

k8s-app: metrics-server

roleRef:

apiGroup: rbac.authorization.k8s.io

kind: ClusterRole

subjects:

kind: ServiceAccount

namespace: kube-system

apiVersion: rbac.authorization.k8s.io/v1

kind: ClusterRoleBinding

metadata:

labels:

k8s-app: metrics-server

roleRef:

apiGroup: rbac.authorization.k8s.io

kind: ClusterRole

subjects:

kind: ServiceAccount

namespace: kube-system

apiVersion: v1

kind: Service

metadata:

labels:

k8s-app: metrics-server

namespace: kube-system

spec:

ports:

name: https

port: 443

protocol: TCP

targetPort: https

selector:

k8s-app: metrics-server

apiVersion: apps/v1

kind: Deployment

metadata:

labels:

k8s-app: metrics-server

namespace: kube-system

spec:

selector:

matchLabels:

k8s-app: metrics-server

strategy:

rollingUpdate:

maxUnavailable: 0

template:

metadata:

labels:

k8s-app: metrics-server

spec:

containers:

args:
--cert-dir=/tmp
--secure-port=4443
--kubelet-insecure-tls
--kubelet-preferred-address-types=InternalIP
--kubelet-use-node-status-port
--metric-resolution=15s

image: guopengfee/metrics-server:v0.6.4

imagePullPolicy: IfNotPresent

livenessProbe:

failureThreshold: 3

httpGet:

path: /livez

port: https

scheme: HTTPS

periodSeconds: 10

ports:

containerPort: 4443

protocol: TCP

readinessProbe:

failureThreshold: 3

httpGet:

path: /readyz

port: https

scheme: HTTPS

initialDelaySeconds: 20

periodSeconds: 10

resources:

requests:

cpu: 100m

memory: 200Mi

securityContext:

allowPrivilegeEscalation: false

readOnlyRootFilesystem: true

runAsNonRoot: true

runAsUser: 1000

volumeMounts:

mountPath: /tmp

nodeSelector:

kubernetes.io/os: linux

priorityClassName: system-cluster-critical

serviceAccountName: metrics-server

volumes:

emptyDir: {}

apiVersion: apiregistration.k8s.io/v1

kind: APIService

metadata:

labels:

k8s-app: metrics-server

spec:

group: metrics.k8s.io

groupPriorityMinimum: 100

insecureSkipTLSVerify: true

service:

namespace: kube-system

version: v1beta1

versionPriority: 100

```

1.4 部署"components.yaml"

```

kubectl apply -f components.yaml

```

1.5 查看pod

```

[root@master01 metric_server]# kubectl get pod -n kube-system

NAME READY STATUS RESTARTS AGE

kube-flannel-ds-6mppc 1/1 Running 1 (4h52m ago) 6h13m

...

metrics-server-5546477ddb-5f4b2 1/1 Running 0 12m

```

二、集群版部署

2.0、高可用集群版本需要修改kube-apiserver参数如下" - --enable-aggregator-routing=true"

```

apiVersion: v1

kind: Pod

metadata:

labels:

component: kube-apiserver

tier: control-plane

namespace: kube-system

spec:

containers:

command:
kube-apiserver

...

--service-cluster-ip-range=10.233.0.0/18
--enable-aggregator-routing=true

...

```

2.1、下载metric-server-cluster

```

wget https://github.com/kubernetes-sigs/metrics-server/releases/latest/download/high-availability-1.21+.yaml

```

2.2、替换镜像并修改参数

```

spec:

affinity:

podAntiAffinity:

requiredDuringSchedulingIgnoredDuringExecution:

labelSelector:

matchLabels:

k8s-app: metrics-server

namespaces:

kube-system

topologyKey: kubernetes.io/hostname

containers:

args:
--cert-dir=/tmp
--secure-port=4443
--kubelet-insecure-tls
--kubelet-preferred-address-types=InternalIP
--kubelet-use-node-status-port
--metric-resolution=15s

image: guopengfee/metrics-server:v0.6.4

imagePullPolicy: IfNotPresent

livenessProbe:

```

2.3、完整配置文件"high-availability-1.21+.yamll"

```

[root@master01 metric_server]# cat high-availability-1.21+.yaml

apiVersion: v1

kind: ServiceAccount

metadata:

labels:

k8s-app: metrics-server

namespace: kube-system

apiVersion: rbac.authorization.k8s.io/v1

kind: ClusterRole

metadata:

labels:

k8s-app: metrics-server

rbac.authorization.k8s.io/aggregate-to-admin: "true"

rbac.authorization.k8s.io/aggregate-to-edit: "true"

rbac.authorization.k8s.io/aggregate-to-view: "true"

rules:

apiGroups:
metrics.k8s.io

resources:

pods
nodes

verbs:

get
list
watch

apiVersion: rbac.authorization.k8s.io/v1

kind: ClusterRole

metadata:

labels:

k8s-app: metrics-server

rules:

apiGroups:
""

resources:

nodes/metrics

verbs:

get
apiGroups:
""

resources:

pods
nodes

verbs:

get
list
watch

apiVersion: rbac.authorization.k8s.io/v1

kind: RoleBinding

metadata:

labels:

k8s-app: metrics-server

namespace: kube-system

roleRef:

apiGroup: rbac.authorization.k8s.io

kind: Role

subjects:

kind: ServiceAccount

namespace: kube-system

apiVersion: rbac.authorization.k8s.io/v1

kind: ClusterRoleBinding

metadata:

labels:

k8s-app: metrics-server

roleRef:

apiGroup: rbac.authorization.k8s.io

kind: ClusterRole

subjects:

kind: ServiceAccount

namespace: kube-system

apiVersion: rbac.authorization.k8s.io/v1

kind: ClusterRoleBinding

metadata:

labels:

k8s-app: metrics-server

roleRef:

apiGroup: rbac.authorization.k8s.io

kind: ClusterRole

subjects:

kind: ServiceAccount

namespace: kube-system

apiVersion: v1

kind: Service

metadata:

labels:

k8s-app: metrics-server

namespace: kube-system

spec:

ports:

name: https

port: 443

protocol: TCP

targetPort: https

selector:

k8s-app: metrics-server

apiVersion: apps/v1

kind: Deployment

metadata:

labels:

k8s-app: metrics-server

namespace: kube-system

spec:

replicas: 2

selector:

matchLabels:

k8s-app: metrics-server

strategy:

rollingUpdate:

maxUnavailable: 1

template:

metadata:

labels:

k8s-app: metrics-server

spec:

affinity:

podAntiAffinity:

requiredDuringSchedulingIgnoredDuringExecution:

labelSelector:

matchLabels:

k8s-app: metrics-server

namespaces:

kube-system

topologyKey: kubernetes.io/hostname

containers:

args:
--cert-dir=/tmp
--secure-port=4443
--kubelet-insecure-tls
--kubelet-preferred-address-types=InternalIP
--kubelet-use-node-status-port
--metric-resolution=15s

image: guopengfee/metrics-server:v0.6.4

imagePullPolicy: IfNotPresent

livenessProbe:

failureThreshold: 3

httpGet:

path: /livez

port: https

scheme: HTTPS

periodSeconds: 10

ports:

containerPort: 4443

protocol: TCP

readinessProbe:

failureThreshold: 3

httpGet:

path: /readyz

port: https

scheme: HTTPS

initialDelaySeconds: 20

periodSeconds: 10

resources:

requests:

cpu: 100m

memory: 200Mi

securityContext:

allowPrivilegeEscalation: false

readOnlyRootFilesystem: true

runAsNonRoot: true

runAsUser: 1000

volumeMounts:

mountPath: /tmp

nodeSelector:

kubernetes.io/os: linux

priorityClassName: system-cluster-critical

serviceAccountName: metrics-server

volumes:

emptyDir: {}

apiVersion: policy/v1

kind: PodDisruptionBudget

metadata:

namespace: kube-system

spec:

minAvailable: 1

selector:

matchLabels:

k8s-app: metrics-server

apiVersion: apiregistration.k8s.io/v1

kind: APIService

metadata:

labels:

k8s-app: metrics-server

spec:

group: metrics.k8s.io

groupPriorityMinimum: 100

insecureSkipTLSVerify: true

service:

namespace: kube-system

version: v1beta1

versionPriority: 100

```

2.4、部署"high-availability-1.21+.yaml"

```

kubectl apply -f high-availability-1.21+.yaml

```

2.5、查看pod

```

[root@master01 metric_server]# kubectl get pod -n kube-system

NAME READY STATUS RESTARTS AGE

coredns-757cd945b-572wz 1/1 Running 1 (6h4m ago) 7h24m

coredns-757cd945b-gvd5g 1/1 Running 1 (6h4m ago) 7h24m

kube-apiserver-master01 1/1 Running 0 10m

...

metrics-server-6dcfcfd57c-bzqn9 1/1 Running 0 6m15s

metrics-server-6dcfcfd57c-qf8vv 1/1 Running 0 6m15s

...

```