k8s1.18.17 安装metric-server:v0.4.4
简介metric-server 从kubelet收集监控指标,用于水平扩容(HPA)和垂直扩容(VPA),不适合作为完整的监控解决方案,完整的监控解决方案应当使用 Prometheus。metric-server支持5,000 节点的集群每个监控节点消耗 1m core of CPU and 3 MB of memory。部署kubectl apply -f https://github.com/
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简介
metric-server 从kubelet收集监控指标,用于水平扩容(HPA)和垂直扩容(VPA) ,不适合作为完整的监控解决方案,完整的监控解决方案应当使用 Prometheus。
metric-server支持
- 5,000 节点的集群
- 每个监控节点消耗 1m core of CPU and 3 MB of memory。
部署
本次实验测试版本:
k8s1.18.17
metrics-server v0.4.4
下载部署文件
wget -O metrics-server-v0.4.4.yaml https://github.com/kubernetes-sigs/metrics-server/releases/download/v0.4.4/components.yaml
文件内容
添加 --kubelet-insecure-tls 参数,也可以创建证书。此处添加参数–kubelet-insecure-tls 参数。
apiVersion: v1
kind: ServiceAccount
metadata:
labels:
k8s-app: metrics-server
name: 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"
name: system:aggregated-metrics-reader
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
name: system:metrics-server
rules:
- apiGroups:
- ""
resources:
- pods
- nodes
- nodes/stats
- namespaces
- configmaps
verbs:
- get
- list
- watch
---
apiVersion: rbac.authorization.k8s.io/v1
kind: RoleBinding
metadata:
labels:
k8s-app: metrics-server
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
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
labels:
k8s-app: metrics-server
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
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
labels:
k8s-app: metrics-server
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
---
apiVersion: v1
kind: Service
metadata:
labels:
k8s-app: metrics-server
name: 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
name: 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-preferred-address-types=InternalIP,ExternalIP,Hostname
- --kubelet-use-node-status-port
- --kubelet-insecure-tls
image: k8s.gcr.io/metrics-server/metrics-server:v0.4.4
imagePullPolicy: IfNotPresent
livenessProbe:
failureThreshold: 3
httpGet:
path: /livez
port: https
scheme: HTTPS
periodSeconds: 10
name: metrics-server
ports:
- containerPort: 4443
name: https
protocol: TCP
readinessProbe:
failureThreshold: 3
httpGet:
path: /readyz
port: https
scheme: HTTPS
periodSeconds: 10
securityContext:
readOnlyRootFilesystem: true
runAsNonRoot: true
runAsUser: 1000
volumeMounts:
- mountPath: /tmp
name: tmp-dir
tolerations:
- key: "node-role.kubernetes.io/master"
operator: Exists
effect: "NoSchedule"
affinity:
nodeAffinity:
preferredDuringSchedulingIgnoredDuringExecution:
- weight: 3
preference:
matchExpressions:
- key: node-role.kubernetes.io/master
operator: Exists
nodeSelector:
kubernetes.io/os: linux
priorityClassName: system-cluster-critical
serviceAccountName: metrics-server
volumes:
- emptyDir: {}
name: tmp-dir
---
apiVersion: apiregistration.k8s.io/v1
kind: APIService
metadata:
labels:
k8s-app: metrics-server
name: v1beta1.metrics.k8s.io
spec:
group: metrics.k8s.io
groupPriorityMinimum: 100
insecureSkipTLSVerify: true
service:
name: metrics-server
namespace: kube-system
version: v1beta1
versionPriority: 100
下载镜像
如果不能直接从官方下载,通过其它渠道下载后,导入。
docker pull k8s.gcr.io/metrics-server/metrics-server:v0.4.4
apiserver 添加参数
apiserver 添加参数enable-aggregator-routing=true。
vim /etc/kubernetes/manifests/kube-apiserver.yaml
部署命令
kubectl create -f metrics-server-v0.4.4.yaml
验证
kubectl top nodes
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