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K8S集群搭建v1.20.1及DashBoard v2.1.0(Metrics-Server v0.3.6)

作者:互联网

最近公司要搭建一套k8s集群,之前没有接触过,通过各种查资料以及网上各种大神的经验教程,发现没有一个比较全面的部署过程,整合了一下各位大神的资料,实际部署了一套k8s以及DashBoard,把全过程整理记录了一遍,供像我这样的小白参考,少走些弯路,里边要是有不对的地方大家多多指正~

一、K8S集群搭建(v1.20.1)

Kubernetes(简称K8S)是开源的容器集群管理系统,可以实现容器集群的自动化部署、自动扩缩容、维护等功能。它既是一款容器编排工具,也是全新的基于容器技术的分布式架构领先方案。在Docker技术的基础上,为容器化的应用提供部署运行、资源调度、服务发现和动态伸缩等功能,提高了大规模容器集群管理的便捷性。

1.安装要求

一台或多台机器,操作系统 CentOS7.x-86_x64
硬件配置:2GB或更多RAM,2个CPU或更多CPU,硬盘30GB或更多
集群中所有机器之间网络互通
可以访问外网,需要拉取镜像
禁止swap分区

2.环境

k8s-master 10.238.211.9
k8s-node1 10.238.211.10

3.修改主机名

##重启后永久生效

k8s-master:

hostnamectl set-hostname k8s-master

k8s-node1:

hostnamectl set-hostname k8s-node1

4.防火墙关闭

systemctl stop firewalld
systemctl disable firewalld

5.关闭selinux

setenforce 0 # 临时关闭
 sed -i 's/SELINUX=enforcing/SELINUX=disabled/g' /etc/selinux/config # 永久关闭

6.关闭swap

swapoff -a # 临时关闭;关闭swap主要是为了性能考虑
sed -ri 's/.*swap.*/#&/' /etc/fstab
free # 可以通过这个命令查看swap是否关闭了
              total        used        free      shared  buff/cache   available
Mem:       16252364     1252988    11474440      845676     3524936    13692724
Swap:             0           0           0

7.添加主机名与IP对应的关系

vim /etc/hosts
10.238.211.9    k8s-master
10.238.211.10   k8s-node-1

8.将桥接的IPv4流量传递到iptables的链

cat > /etc/sysctl.d/k8s.conf << EOF
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
EOF
sysctl --system

9.安装Docker

添加docker yum源

wget https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo -O/etc/yum.repos.d/docker-ce.repo

安装

$ yum -y install docker-ce

设置开机启动

systemctl enable docker

启动docker

systemctl start docker

10.添加阿里云YUM软件源

由于国内网络限制比较多,所以需要把软件源设置为阿里云

cat > /etc/yum.repos.d/kubernetes.repo << EOF
[k8s]
name=k8s
enabled=1
gpgcheck=0
baseurl=https://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64/
EOF

11.安装kubeadm,kubelet和kubectl

kubelet # 运行在 Cluster 所有节点上,负责启动 Pod 和容器

kubeadm # 用于初始化 Cluster

kubectl # 是 Kubernetes 命令行工具。通过 kubectl 可以部署和管理应用,查看各种资源,创建、删除和更新各种组件

# 这里安装最新的v1.20.1
yum install kubelet kubeadm kubectl -y
# 此时,还不能启动kubelet,因为此时配置还不能,现在仅仅可以设置开机自启动
systemctl enable kubelet

12.部署Kubernetes Master(只在master上操作)

初始化kubeadm
(只需要修改apiserver-advertise-address及kubernetes-version)

kubeadm init \
--apiserver-advertise-address=10.238.211.9 \
--image-repository registry.aliyuncs.com/google_containers \
--kubernetes-version v1.20.1 \
--service-cidr=10.1.0.0/16 \
--pod-network-cidr=10.244.0.0/16

–image-repository string: 这个用于指定从什么位置来拉取镜像(1.13版本才有的),默认值是k8s.gcr.io,我们将其指定为国内镜像地址:registry.aliyuncs.com/google_containers

–kubernetes-version string: 指定kubenets版本号,默认值是stable-1,会导致从https://dl.k8s.io/release/stable-1.txt下载最新的版本号,我们可以将其指定为固定版本(v1.15.1)来跳过网络请求。

–apiserver-advertise-address 指明用 Master 的哪个 interface 与 Cluster 的其他节点通信。如果 Master 有多个 interface,建议明确指定,如果不指定,kubeadm 会自动选择有默认网关的 interface。

–pod-network-cidr 指定 Pod 网络的范围。Kubernetes支持多种网络方案,而且不同网络方案对 –pod-network-cidr有自己的要求,这里设置为10.244.0.0/16是因为我们将使用 flannel 网络方案,必须设置成这个 CIDR。

等待初始化成功后会有提示信息,由于没有截图从网上找了一个别人的图,红色框内的命令是需要后续执行的(master执行第一个红框,node机器执行第二个红框,第13步操作)
在这里插入图片描述执行命令:

mkdir -p $HOME/.kube
sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
sudo chown $(id -u):$(id -g) $HOME/.kube/config

13.安装Pod网络插件(CNI)(只在master上操作)

kubectl apply -f kube-flannel.yml

这是我的配置文件,可以复制好上传到服务器直接执行上面语句

---
apiVersion: policy/v1beta1
kind: PodSecurityPolicy
metadata:
  name: psp.flannel.unprivileged
  annotations:
    seccomp.security.alpha.kubernetes.io/allowedProfileNames: docker/default
    seccomp.security.alpha.kubernetes.io/defaultProfileName: docker/default
    apparmor.security.beta.kubernetes.io/allowedProfileNames: runtime/default
    apparmor.security.beta.kubernetes.io/defaultProfileName: runtime/default
spec:
  privileged: false
  volumes:
    - configMap
    - secret
    - emptyDir
    - hostPath
  allowedHostPaths:
    - pathPrefix: "/etc/cni/net.d"
    - pathPrefix: "/etc/kube-flannel"
    - pathPrefix: "/run/flannel"
  readOnlyRootFilesystem: false
  # Users and groups
  runAsUser:
    rule: RunAsAny
  supplementalGroups:
    rule: RunAsAny
  fsGroup:
    rule: RunAsAny
  # Privilege Escalation
  allowPrivilegeEscalation: false
  defaultAllowPrivilegeEscalation: false
  # Capabilities
  allowedCapabilities: ['NET_ADMIN']
  defaultAddCapabilities: []
  requiredDropCapabilities: []
  # Host namespaces
  hostPID: false
  hostIPC: false
  hostNetwork: true
  hostPorts:
  - min: 0
    max: 65535
  # SELinux
  seLinux:
    # SELinux is unused in CaaSP
    rule: 'RunAsAny'
---
kind: ClusterRole
apiVersion: rbac.authorization.k8s.io/v1beta1
metadata:
  name: flannel
rules:
  - apiGroups: ['extensions']
    resources: ['podsecuritypolicies']
    verbs: ['use']
    resourceNames: ['psp.flannel.unprivileged']
  - apiGroups:
      - ""
    resources:
      - pods
    verbs:
      - get
  - apiGroups:
      - ""
    resources:
      - nodes
    verbs:
      - list
      - watch
  - apiGroups:
      - ""
    resources:
      - nodes/status
    verbs:
      - patch
---
kind: ClusterRoleBinding
apiVersion: rbac.authorization.k8s.io/v1beta1
metadata:
  name: flannel
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: flannel
subjects:
- kind: ServiceAccount
  name: flannel
  namespace: kube-system
---
apiVersion: v1
kind: ServiceAccount
metadata:
  name: flannel
  namespace: kube-system
---
kind: ConfigMap
apiVersion: v1
metadata:
  name: kube-flannel-cfg
  namespace: kube-system
  labels:
    tier: node
    app: flannel
data:
  cni-conf.json: |
    {
      "name": "cbr0",
      "cniVersion": "0.3.1",
      "plugins": [
        {
          "type": "flannel",
          "delegate": {
            "hairpinMode": true,
            "isDefaultGateway": true
          }
        },
        {
          "type": "portmap",
          "capabilities": {
            "portMappings": true
          }
        }
      ]
    }
  net-conf.json: |
    {
      "Network": "10.244.0.0/16",
      "Backend": {
        "Type": "vxlan"
      }
    }
---
apiVersion: apps/v1
kind: DaemonSet
metadata:
  name: kube-flannel-ds-amd64
  namespace: kube-system
  labels:
    tier: node
    app: flannel
spec:
  selector:
    matchLabels:
      app: flannel
  template:
    metadata:
      labels:
        tier: node
        app: flannel
    spec:
      affinity:
        nodeAffinity:
          requiredDuringSchedulingIgnoredDuringExecution:
            nodeSelectorTerms:
              - matchExpressions:
                  - key: beta.kubernetes.io/os
                    operator: In
                    values:
                      - linux
                  - key: beta.kubernetes.io/arch
                    operator: In
                    values:
                      - amd64
      hostNetwork: true
      tolerations:
      - operator: Exists
        effect: NoSchedule
      serviceAccountName: flannel
      initContainers:
      - name: install-cni
        image: quay.io/coreos/flannel:v0.11.0-amd64
        command:
        - cp
        args:
        - -f
        - /etc/kube-flannel/cni-conf.json
        - /etc/cni/net.d/10-flannel.conflist
        volumeMounts:
        - name: cni
          mountPath: /etc/cni/net.d
        - name: flannel-cfg
          mountPath: /etc/kube-flannel/
      containers:
      - name: kube-flannel
        image: quay.io/coreos/flannel:v0.11.0-amd64
        command:
        - /opt/bin/flanneld
        args:
        - --ip-masq
        - --kube-subnet-mgr
        resources:
          requests:
            cpu: "100m"
            memory: "50Mi"
          limits:
            cpu: "100m"
            memory: "50Mi"
        securityContext:
          privileged: false
          capabilities:
            add: ["NET_ADMIN"]
        env:
        - name: POD_NAME
          valueFrom:
            fieldRef:
              fieldPath: metadata.name
        - name: POD_NAMESPACE
          valueFrom:
            fieldRef:
              fieldPath: metadata.namespace
        volumeMounts:
        - name: run
          mountPath: /run/flannel
        - name: flannel-cfg
          mountPath: /etc/kube-flannel/
      volumes:
        - name: run
          hostPath:
            path: /run/flannel
        - name: cni
          hostPath:
            path: /etc/cni/net.d
        - name: flannel-cfg
          configMap:
            name: kube-flannel-cfg
---
apiVersion: apps/v1
kind: DaemonSet
metadata:
  name: kube-flannel-ds-arm64
  namespace: kube-system
  labels:
    tier: node
    app: flannel
spec:
  selector:
    matchLabels:
      app: flannel
  template:
    metadata:
      labels:
        tier: node
        app: flannel
    spec:
      affinity:
        nodeAffinity:
          requiredDuringSchedulingIgnoredDuringExecution:
            nodeSelectorTerms:
              - matchExpressions:
                  - key: beta.kubernetes.io/os
                    operator: In
                    values:
                      - linux
                  - key: beta.kubernetes.io/arch
                    operator: In
                    values:
                      - arm64
      hostNetwork: true
      tolerations:
      - operator: Exists
        effect: NoSchedule
      serviceAccountName: flannel
      initContainers:
      - name: install-cni
        image: quay.io/coreos/flannel:v0.11.0-arm64
        command:
        - cp
        args:
        - -f
        - /etc/kube-flannel/cni-conf.json
        - /etc/cni/net.d/10-flannel.conflist
        volumeMounts:
        - name: cni
          mountPath: /etc/cni/net.d
        - name: flannel-cfg
          mountPath: /etc/kube-flannel/
      containers:
      - name: kube-flannel
        image: quay.io/coreos/flannel:v0.11.0-arm64
        command:
        - /opt/bin/flanneld
        args:
        - --ip-masq
        - --kube-subnet-mgr
        resources:
          requests:
            cpu: "100m"
            memory: "50Mi"
          limits:
            cpu: "100m"
            memory: "50Mi"
        securityContext:
          privileged: false
          capabilities:
             add: ["NET_ADMIN"]
        env:
        - name: POD_NAME
          valueFrom:
            fieldRef:
              fieldPath: metadata.name
        - name: POD_NAMESPACE
          valueFrom:
            fieldRef:
              fieldPath: metadata.namespace
        volumeMounts:
        - name: run
          mountPath: /run/flannel
        - name: flannel-cfg
          mountPath: /etc/kube-flannel/
      volumes:
        - name: run
          hostPath:
            path: /run/flannel
        - name: cni
          hostPath:
            path: /etc/cni/net.d
        - name: flannel-cfg
          configMap:
            name: kube-flannel-cfg
---
apiVersion: apps/v1
kind: DaemonSet
metadata:
  name: kube-flannel-ds-arm
  namespace: kube-system
  labels:
    tier: node
    app: flannel
spec:
  selector:
    matchLabels:
      app: flannel
  template:
    metadata:
      labels:
        tier: node
        app: flannel
    spec:
      affinity:
        nodeAffinity:
          requiredDuringSchedulingIgnoredDuringExecution:
            nodeSelectorTerms:
              - matchExpressions:
                  - key: beta.kubernetes.io/os
                    operator: In
                    values:
                      - linux
                  - key: beta.kubernetes.io/arch
                    operator: In
                    values:
                      - arm
      hostNetwork: true
      tolerations:
      - operator: Exists
        effect: NoSchedule
      serviceAccountName: flannel
      initContainers:
      - name: install-cni
        image: quay.io/coreos/flannel:v0.11.0-arm
        command:
        - cp
        args:
        - -f
        - /etc/kube-flannel/cni-conf.json
        - /etc/cni/net.d/10-flannel.conflist
        volumeMounts:
        - name: cni
          mountPath: /etc/cni/net.d
        - name: flannel-cfg
          mountPath: /etc/kube-flannel/
      containers:
      - name: kube-flannel
        image: quay.io/coreos/flannel:v0.11.0-arm
        command:
        - /opt/bin/flanneld
        args:
        - --ip-masq
        - --kube-subnet-mgr
        resources:
          requests:
            cpu: "100m"
            memory: "50Mi"
          limits:
            cpu: "100m"
            memory: "50Mi"
        securityContext:
          privileged: false
          capabilities:
             add: ["NET_ADMIN"]
        env:
        - name: POD_NAME
          valueFrom:
            fieldRef:
              fieldPath: metadata.name
        - name: POD_NAMESPACE
          valueFrom:
            fieldRef:
              fieldPath: metadata.namespace
        volumeMounts:
        - name: run
          mountPath: /run/flannel
        - name: flannel-cfg
          mountPath: /etc/kube-flannel/
      volumes:
        - name: run
          hostPath:
            path: /run/flannel
        - name: cni
          hostPath:
            path: /etc/cni/net.d
        - name: flannel-cfg
          configMap:
            name: kube-flannel-cfg
---
apiVersion: apps/v1
kind: DaemonSet
metadata:
  name: kube-flannel-ds-ppc64le
  namespace: kube-system
  labels:
    tier: node
    app: flannel
spec:
  selector:
    matchLabels:
      app: flannel
  template:
    metadata:
      labels:
        tier: node
        app: flannel
    spec:
      affinity:
        nodeAffinity:
          requiredDuringSchedulingIgnoredDuringExecution:
            nodeSelectorTerms:
              - matchExpressions:
                  - key: beta.kubernetes.io/os
                    operator: In
                    values:
                      - linux
                  - key: beta.kubernetes.io/arch
                    operator: In
                    values:
                      - ppc64le
      hostNetwork: true
      tolerations:
      - operator: Exists
        effect: NoSchedule
      serviceAccountName: flannel
      initContainers:
      - name: install-cni
        image: quay.io/coreos/flannel:v0.11.0-ppc64le
        command:
        - cp
        args:
        - -f
        - /etc/kube-flannel/cni-conf.json
        - /etc/cni/net.d/10-flannel.conflist
        volumeMounts:
        - name: cni
          mountPath: /etc/cni/net.d
        - name: flannel-cfg
          mountPath: /etc/kube-flannel/
      containers:
      - name: kube-flannel
        image: quay.io/coreos/flannel:v0.11.0-ppc64le
        command:
        - /opt/bin/flanneld
        args:
        - --ip-masq
        - --kube-subnet-mgr
        resources:
          requests:
            cpu: "100m"
            memory: "50Mi"
          limits:
            cpu: "100m"
            memory: "50Mi"
        securityContext:
          privileged: false
          capabilities:
             add: ["NET_ADMIN"]
        env:
        - name: POD_NAME
          valueFrom:
            fieldRef:
              fieldPath: metadata.name
        - name: POD_NAMESPACE
          valueFrom:
            fieldRef:
              fieldPath: metadata.namespace
        volumeMounts:
        - name: run
          mountPath: /run/flannel
        - name: flannel-cfg
          mountPath: /etc/kube-flannel/
      volumes:
        - name: run
          hostPath:
            path: /run/flannel
        - name: cni
          hostPath:
            path: /etc/cni/net.d
        - name: flannel-cfg
          configMap:
            name: kube-flannel-cfg
---
apiVersion: apps/v1
kind: DaemonSet
metadata:
  name: kube-flannel-ds-s390x
  namespace: kube-system
  labels:
    tier: node
    app: flannel
spec:
  selector:
    matchLabels:
      app: flannel
  template:
    metadata:
      labels:
        tier: node
        app: flannel
    spec:
      affinity:
        nodeAffinity:
          requiredDuringSchedulingIgnoredDuringExecution:
            nodeSelectorTerms:
              - matchExpressions:
                  - key: beta.kubernetes.io/os
                    operator: In
                    values:
                      - linux
                  - key: beta.kubernetes.io/arch
                    operator: In
                    values:
                      - s390x
      hostNetwork: true
      tolerations:
      - operator: Exists
        effect: NoSchedule
      serviceAccountName: flannel
      initContainers:
      - name: install-cni
        image: quay.io/coreos/flannel:v0.11.0-s390x
        command:
        - cp
        args:
        - -f
        - /etc/kube-flannel/cni-conf.json
        - /etc/cni/net.d/10-flannel.conflist
        volumeMounts:
        - name: cni
          mountPath: /etc/cni/net.d
        - name: flannel-cfg
          mountPath: /etc/kube-flannel/
      containers:
      - name: kube-flannel
        image: quay.io/coreos/flannel:v0.11.0-s390x
        command:
        - /opt/bin/flanneld
        args:
        - --ip-masq
        - --kube-subnet-mgr
        resources:
          requests:
            cpu: "100m"
            memory: "50Mi"
          limits:
            cpu: "100m"
            memory: "50Mi"
        securityContext:
          privileged: false
          capabilities:
             add: ["NET_ADMIN"]
        env:
        - name: POD_NAME
          valueFrom:
            fieldRef:
              fieldPath: metadata.name
        - name: POD_NAMESPACE
          valueFrom:
            fieldRef:
              fieldPath: metadata.namespace
        volumeMounts:
        - name: run
          mountPath: /run/flannel
        - name: flannel-cfg
          mountPath: /etc/kube-flannel/
      volumes:
        - name: run
          hostPath:
            path: /run/flannel
        - name: cni
          hostPath:
            path: /etc/cni/net.d
        - name: flannel-cfg
          configMap:
            name: kube-flannel-cfg

14.Node节点加入集群(只在node上操作)

向集群添加新节点,执行在kubeadm init输出的kubeadm join命令

kubeadm join 10.238.211.9:6443 --token iz96vy.f5ukew9geeome5is \
    --discovery-token-ca-cert-hash sha256:72b689426bfc34512294c29b39ea3b2af3a94e39f62c4434f3a49f16d51a1382 

在master端查看:

kubectl get node
 NAME         STATUS   ROLES                  AGE   VERSION
k8s-master   Ready    control-plane,master   47h   v1.20.1
k8s-node-1   Ready    <none>                 46h   v1.20.1
kubectl get pods -n kube-system
NAME                                 READY   STATUS    RESTARTS   AGE
coredns-7f89b7bc75-hppnq             1/1     Running   0          47h
coredns-7f89b7bc75-mnhf6             1/1     Running   0          47h
etcd-k8s-master                      1/1     Running   0          47h
kube-apiserver-k8s-master            1/1     Running   0          47h
kube-controller-manager-k8s-master   1/1     Running   0          47h
kube-flannel-ds-amd64-8tb2q          1/1     Running   0          46h
kube-flannel-ds-amd64-xwxkz          1/1     Running   0          46h
kube-proxy-95jd2                     1/1     Running   0          46h
kube-proxy-rk4sv                     1/1     Running   0          47h
kube-scheduler-k8s-master            1/1     Running   0          47h

二、DashBoard部署(v2.1.0)

Dashboard 是基于网页的 Kubernetes 用户界面。您可以使用 Dashboard 将容器应用部署到 Kubernetes 集群中,也可以对容器应用排错,还能管理集群资源。您可以使用 Dashboard 获取运行在集群中的应用的概览信息,也可以创建或者修改 Kubernetes 资源(如 Deployment,Job,DaemonSet 等等)。例如,您可以对 Deployment 实现弹性伸缩、发起滚动升级、重启 Pod 或者使用向导创建新的应用。

1.获取并修改Yaml文件

项目地址 https://github.com/kubernetes/dashboard/releases

我下载的是最新的V2.1.0,之前使用网上大神说的V1.8.3出现各种神奇问题,还会报404,后来又看了一篇文章,发现是版本问题

下载dashboard-2.1.0.tar.gz

找到配置文件
dashboard/v2.0.0-beta8/aio/deploy/recommended.yaml

修改service通过NodePort方式访问K8S Dashboard

---

kind: Service
apiVersion: v1
metadata:
  labels:
    k8s-app: kubernetes-dashboard
  name: kubernetes-dashboard
  namespace: kubernetes-dashboard
spec:
  type: NodePort #新加此行
  ports:
    - port: 443
      targetPort: 8443
      nodePort: 31080 #新加此行
  selector:
    k8s-app: kubernetes-dashboard

---

2.应用配置文件

kubectl apply -f recommended.yaml

查看pod和service

NAME                                         READY   STATUS    RESTARTS   AGE   IP            NODE         NOMINATED NODE   READINESS GATES
kubernetes-dashboard-7448ffc97b-b62qj        1/1     Running   0          22h   10.244.1.21   k8s-node-1   <none>           <none>

3.访问Dashboard

注:通过Chrome、IE、Safari可能无法访问这个页面,这里使用火狐访问
在这里插入图片描述创建service account并绑定默认cluster-admin管理员集群角色:【依次执行】

kubectl create serviceaccount dashboard-admin -n kube-system
kubectl create clusterrolebinding dashboard-admin --clusterrole=cluster-admin --serviceaccount=kube-system:dashboard-admin

获取Token

kubectl describe secrets -n kube-system $(kubectl -n kube-system get secret | awk '/dashboard-admin/{print $1}')
Name:         dashboard-admin-token-hqvcx
Namespace:    kube-system
Labels:       <none>
Annotations:  kubernetes.io/service-account.name: dashboard-admin
              kubernetes.io/service-account.uid: a9e2c006-6965-419c-84f8-9087368f5661

Type:  kubernetes.io/service-account-token

Data
====
ca.crt:     1066 bytes
namespace:  11 bytes
token:      eyJhbGciOiJSUzI1NiIsImtpZCI6Il9VSS1JYUZma0ppcTVOcTZDQnhTYkF1VW5ySTg4TE1Ocl9tX1o4VEhIQ2MifQ.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.wBYVPmUrSocwTW7gyaRnpgxDStZ24u6Lov3e5jEqPNxAAZ_dHF_cmUm8zTS9DClmLNCK40UgfbMimdpKcLFO7TgIhtBZUc4LZrR2QXjnlebLhRhI6nxWgRZ0CCCnUZLJLM6QsdoXobHhwaFjjs7PEcIa3XaWs9uBnFuVidmDJPNP3ds6nT7BcpD5QnhIAPlcvWdedoTbO6y7AI4X20N9yVL7FYk42RmqOh9GaZNqXK1XLW0iWlspY8gy2MPOG4MHOfdxltvy3uFswPxpb2nDqOJz7hnykMoJOQ0DCUrZTANWzsxBwmvglAOBXE6ZVU6EYCXN10FY8HS-KNPQ1t-W7A

4.登录dashboard

在这里插入图片描述

三、 部署Metrics-Server服务

在新版的K8S中,系统资源的采集均使用Metrics-Server服务,可以通过Metrics-Server服务采集节点和Pod的内存、磁盘、CPU和网络的使用率等信息。

1.下载并解压Metrics-Server

https://github.com/kubernetes-sigs/metrics-server/archive/v0.3.6.tar.gz

2.修改Metrics-Server配置文件

vim metrics-server-0.3.6/deploy/1.8+/metrics-server-deployment.yaml

这是我的配置文件

---
apiVersion: v1
kind: ServiceAccount
metadata:
  name: metrics-server
  namespace: kube-system
---
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:
      serviceAccountName: metrics-server
      volumes:
      # mount in tmp so we can safely use from-scratch images and/or read-only containers
      - name: tmp-dir
        emptyDir: {}
      containers:
      - name: metrics-server
        # 修改image 和 imagePullPolicy
        image: registry.aliyuncs.com/google_containers/metrics-server-amd64:v0.3.6
        imagePullPolicy: IfNotPresent
        # 新增command配置
        command:
        - /metrics-server
        - --kubelet-insecure-tls
        - --kubelet-preferred-address-types=InternalDNS,InternalIP,ExternalDNS,ExternalIP,Hostname
        volumeMounts:
        - name: tmp-dir
          mountPath: /tmp
        # 新增resources配置
        resources:
          limits:
            cpu: 300m
            memory: 200Mi
          requests:
            cpu: 200m
            memory: 100Mi

2.应用配置文件

cd metrics-server-0.3.6/deploy/1.8+
kubectl apply -f .

3.安装完Metrics-Server之后,查看node信息

kubectl top node
NAME         CPU(cores)   CPU%   MEMORY(bytes)   MEMORY%   
k8s-master   90m          2%     2630Mi          16%       
k8s-node-1   35m          0%     2030Mi          12%

4.再次登录DashBoard

各种炫酷图表就可以显示啦~大功告成
在这里插入图片描述

标签:name,Server,Metrics,etc,io,v0.3,kube,cni,flannel
来源: https://blog.csdn.net/Ryan_Leo/article/details/112660505