Kubernetes1.12版本Dashboard和coredns安裝

一.部署Web UI（Dashboard）
1.解壓包，進入目錄
包就在之前的master部署組件裏
這裏裏面kubernetes-server-linux-amd64.tar.gz

2.執行yaml文件

查看啓動的pod，沒在默認命名空間，在kube-system下

注：
其中dashboard-controller.yaml這個裏面的dashboard鏡像是國外的，如果慢，可以換成國內的鏡像地址 image: registry.cn-hangzhou.aliyuncs.com/google_containers/kubernetes-dashboard-amd64:v1.10.0

3.創建Dashboard服務

4.查看啓動的Dashboard服務

外網訪問的是端口是44721

5.設置登陸令牌，訪問web界面
創建用戶訪問，綁定集羣管理員，使用它產生的密鑰

創建賬戶產生的token

查看token

複製token到頁面上即可

二.coredns的安裝
安裝coredns的yaml文檔可以在kubernetes的github上找到https://github.com/kubernetes/kubernetes/edit/master/cluster/addons/dns/coredns/coredns.yaml.sed

[root@master ~]# vim coredns.yaml

 # Warning: This is a file generated from the base underscore template file: coredns.yaml.base

apiVersion: v1
kind: ServiceAccount
metadata:
name: coredns
namespace: kube-system
labels:
kubernetes.io/cluster-service: "true"
addonmanager.kubernetes.io/mode: Reconcile

apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
labels:
kubernetes.io/bootstrapping: rbac-defaults
addonmanager.kubernetes.io/mode: Reconcile
name: system:coredns
rules:

• apiGroups:
  • ""
    resources:
  • endpoints
  • services
  • pods
  • namespaces
    verbs:
  • list
  • watch
• apiGroups:
  • ""
    resources:
  • nodes
    verbs:

  • get

    apiVersion: rbac.authorization.k8s.io/v1
    kind: ClusterRoleBinding
    metadata:
    annotations:
    rbac.authorization.kubernetes.io/autoupdate: "true"
    labels:
    kubernetes.io/bootstrapping: rbac-defaults
    addonmanager.kubernetes.io/mode: EnsureExists
    name: system:coredns
    roleRef:
    apiGroup: rbac.authorization.k8s.io
    kind: ClusterRole
    name: system:coredns
    subjects:

• kind: ServiceAccount
  name: coredns
  namespace: kube-system

  apiVersion: v1
  kind: ConfigMap
  metadata:
  name: coredns
  namespace: kube-system
  labels:
  addonmanager.kubernetes.io/mode: EnsureExists
  data:
  Corefile: |
  .:53 {
  errors
  health
  kubernetes cluster.local in-addr.arpa ip6.arpa {
  pods insecure
  upstream
  fallthrough in-addr.arpa ip6.arpa
  }
  prometheus :9153
  proxy . /etc/resolv.conf
  cache 30
  loop
  reload
  loadbalance
  }

  apiVersion: extensions/v1beta1
  kind: Deployment
  metadata:
  name: coredns
  namespace: kube-system
  labels:
  k8s-app: kube-dns
  kubernetes.io/cluster-service: "true"
  addonmanager.kubernetes.io/mode: Reconcile
  kubernetes.io/name: "CoreDNS"
  spec:

  replicas: not specified here:

   # 1. In order to make Addon Manager do not reconcile this replicas parameter.
      # 2. Default is 1.
           # 3. Will be tuned in real time if DNS horizontal auto-scaling is turned on.

  strategy:
  type: RollingUpdate
  rollingUpdate:
  maxUnavailable: 1
  selector:
  matchLabels:
  k8s-app: kube-dns
  template:
  metadata:
  labels:
  k8s-app: kube-dns
  annotations:
  seccomp.security.alpha.kubernetes.io/pod: 'docker/default'
  spec:
  serviceAccountName: coredns
  tolerations:

  • key: "CriticalAddonsOnly"
    operator: "Exists"
    containers:
    • name: coredns
      image: coredns/coredns:1.2.6
      imagePullPolicy: IfNotPresent
      resources:
      limits:
      memory: 170Mi
      requests:
      cpu: 100m
      memory: 70Mi
      args: [ "-conf", "/etc/coredns/Corefile" ]
      volumeMounts:
  • name: config-volume
    mountPath: /etc/coredns
    readOnly: true
    ports:
  • containerPort: 53
    name: dns
    protocol: UDP
  • containerPort: 53
    name: dns-tcp
    protocol: TCP
  • containerPort: 9153
    name: metrics
    protocol: TCP
    livenessProbe:
    httpGet:
    path: /health
    port: 8080
    scheme: HTTP
    initialDelaySeconds: 60
    timeoutSeconds: 5
    successThreshold: 1
    failureThreshold: 5
    securityContext:
    allowPrivilegeEscalation: false
    capabilities:
    add:
    • NET_BIND_SERVICE
      drop:
    • all
      readOnlyRootFilesystem: true
      dnsPolicy: Default
      volumes:
  • name: config-volume
    configMap:
    name: coredns
    items:

    • key: Corefile
      path: Corefile

      apiVersion: v1
      kind: Service
      metadata:
      name: kube-dns
      namespace: kube-system
      annotations:
      prometheus.io/port: "9153"
      prometheus.io/scrape: "true"
      labels:
      k8s-app: kube-dns
      kubernetes.io/cluster-service: "true"
      addonmanager.kubernetes.io/mode: Reconcile
      kubernetes.io/name: "CoreDNS"
      spec:
      selector:
      k8s-app: kube-dns
      clusterIP: 10.0.0.2
      ports:

      • name: dns
        port: 53
        protocol: UDP
      • name: dns-tcp
        port: 53
        protocol: TCP

1.部署coredns

2.查看部署結果
[root@master ~]# kubectl get pods -n kube-system