Kubernets二进制安装(17)之安装部署Dashboard

1.下载dashboard镜像

在运维主机(mfyxw50.mfyxw.com)上执行命令

[root@mfyxw50 ~]# docker pull registry.cn-hangzhou.aliyuncs.com/google_containers/kubernetes-dashboard-amd64:v1.10.1

2.对dashboard打标签并上传到私有仓库

在运维主机(mfyxw50.mfyxw.com)上执行命令

[root@mfyxw50 ~]# docker images | grep dashboard
[root@mfyxw50 ~]# docker tage registry.cn-hangzhou.aliyuncs.com/google_containers/kubernetes-dashboard-amd64:v1.10.1 harbor.od.com/public/dashboard:v1.10.1
[root@mfyxw50 ~]# docker login harbor.od.com
[root@mfyxw50 ~]# docker push harbor.od.com/public/dashboard:v1.10.1

3.创建目录用于保存dashboard资源配置清单文件

在运维主机(mfyxw50.mfyxw.com)上执行命令

[root@mfyxw50 ~]# mkdir -p /data/k8s-yaml/dashboard
[root@mfyxw50 ~]# cd /data/k8s-yaml/dashboard/

4.创建dashboard资源配置清单

在运维主机(mfyxw50.mfyxw.com)上执行命令

rbac.yaml文件内容如下：

[root@mfyxw50 ~]# cat > /data/k8s-yaml/dashboard/rbac.yaml << EOF
apiVersion: v1
kind: ServiceAccount
metadata:
  labels:
    k8s-app: kubernetes-dashboard
    addonmanager.kubernetes.io/mode: Reconcile
  name: kubernetes-dashboard-admin
  namespace: kube-system
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
  name: kubernetes-dashboard-admin
  namespace: kube-system
  labels:
    k8s-app: kubernetes-dashboard
    addonmanager.kubernetes.io/mode: Reconcile
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: cluster-admin
subjects:
- kind: ServiceAccount
  name: kubernetes-dashboard-admin
  namespace: kube-system
EOF

deployment.yaml文件内容如下：

[root@mfyxw50 ~]# cat > /data/k8s-yaml/dashboard/deployment.yaml << EOF
apiVersion: apps/v1
kind: Deployment
metadata:
  name: kubernetes-dashboard
  namespace: kube-system
  labels:
    k8s-app: kubernetes-dashboard
    kubernetes.io/cluster-service: "true"
    addonmanager.kubernetes.io/mode: Reconcile
spec:
  selector:
    matchLabels:
      k8s-app: kubernetes-dashboard
  template:
    metadata:
      labels:
        k8s-app: kubernetes-dashboard
      annotations:
        scheduler.alpha.kubernetes.io/critical-pod: ''
    spec:
      priorityClassName: system-cluster-critical
      containers:
      - name: kubernetes-dashboard
        image: harbor.od.com/public/dashboard:v1.10.1
        resources:
          limits:
            cpu: 100m
            memory: 300Mi
          requests:
            cpu: 50m
            memory: 100Mi
        ports:
        - containerPort: 8443
          protocol: TCP
        args:
          # PLATFORM-SPECIFIC ARGS HERE
          - --auto-generate-certificates
        volumeMounts:
        - name: tmp-volume
          mountPath: /tmp
        livenessProbe:
          httpGet:
            scheme: HTTPS
            path: /
            port: 8443
          initialDelaySeconds: 30
          timeoutSeconds: 30
      volumes:
      - name: tmp-volume
        emptyDir: {}
      serviceAccountName: kubernetes-dashboard-admin
      tolerations:
      - key: "CriticalAddonsOnly"
        operator: "Exists"
EOF

svc.yaml文件内容如下：

[root@mfyxw50 ~]# cat > /data/k8s-yaml/dashboard/svc.yaml << EOF
apiVersion: v1
kind: Service
metadata:
  name: kubernetes-dashboard
  namespace: kube-system
  labels:
    k8s-app: kubernetes-dashboard
    kubernetes.io/cluster-service: "true"
    addonmanager.kubernetes.io/mode: Reconcile
spec:
  selector:
    k8s-app: kubernetes-dashboard
  ports:
  - port: 443
    targetPort: 8443
EOF

ingress文件内容如下：

[root@mfyxw50 ~]# cat > /data/k8s-yaml/dashboard/ingress.yaml << EOF
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  name: kubernetes-dashboard
  namespace: kube-system
  annotations:
    kubernetes.io/ingress.class: traefik
spec:
  rules:
  - host: dashboard.od.com
    http:
      paths:
      - backend:
          serviceName: kubernetes-dashboard
          servicePort: 443
EOF

5.应用dashboard资源配置文件

在master主机(mfyxw30.mfyxw.com或mfyxw40.mfyxw.com)任意一台执行

[root@mfyxw30 ~]# kubectl apply -f http://k8s-yaml.od.com/dashboard/rbac.yaml
[root@mfyxw30 ~]# kubectl apply -f http://k8s-yaml.od.com/dashboard/deployment.yaml
[root@mfyxw30 ~]# kubectl apply -f http://k8s-yaml.od.com/dashboard/svc.yaml
[root@mfyxw30 ~]# kubectl apply -f http://k8s-yaml.od.com/dashboard/ingress.yaml

6.在DNS服务器上配置域名解析

在mfyxw10.mfyxw.com主机下执行

[root@mfyxw10 ~]# cat > /var/named/od.com.zone << EOF
\$ORIGIN od.com.
\$TTL 600   ; 10 minutes
@       IN  SOA dns.od.com.   dnsadmin.od.com. (
                             ;序号请加1，表示比之前版本要新
                             2020031306 ; serial
                             10800          ; refresh (3 hours)
                             900              ; retry (15 minutes)
                             604800         ; expire (1 week)
                             86400          ; minimum (1 day)
                              )
                      NS   dns.od.com.
\$TTL 60 ;  1 minute
dns             A          192.168.80.10
harbor          A          192.168.80.50   ;添加harbor记录
k8s-yaml        A          192.168.80.50
traefik         A          192.168.80.100
dashboard       A          192.168.80.100
EOF

7.重载DNS服务

在mfyxw10.mfyxw.com主机下执行

[root@mfyxw10 ~]# systemctl restart named
[root@mfyxw10 ~]# ping dashboard.od.com

8.生成dashboard证书

在运维主机(mfyxw50.mfyxw.com)上执行

[root@mfyxw50 ~]# cd /opt/certs/
[root@mfyxw50 certs]# (umask 077 openssl genrsa -out dashboard.od.com 2018)
[root@mfyxw50 certs]# openssl req -new -key dashboard.od.com.key -out dashboard.od.com.csr -subj "/CN=dashboard.od.com/C=CN/ST=GD/L=GuangDong/O=Heroge/OU=ops"
[root@mfyxw50 certs]# openssl x509 -req -in dashboard.od.com.csr -CA ca.pem -CAkey ca-key.pem -CAcreateserial -out dashboard.od.com -days 3650

9.将生成的dashboard证书复制相对应的主机

分别在mfyxw10.mfyxw.com和mfyxw20.mfyxw.com主机执行

~]# mkdir -p /etc/nginx/certs
~]# cd /etc/nginx/certs/
certs]# scp -r root@mfyxw50:/opt/certs/dashboard.od.com.crt .
certs]# scp -r root@mfyxw50:/opt/certs/dashboard.od.com.key .

10.为域名提供nginx的证书配置文件

分别在mfyxw10.mfyxw.com和mfyxw20.mfyxw.com上机上执行如下命令

~]# cat > /etc/nginx/conf.d/dashboard.od.com.conf << EOF
server {
    listen       80;
    server_name  dashboard.od.com;

    rewrite ^(.*)\$ https://\${server_name}\$1 permanent;
}
server {
    listen       443 ssl;
    server_name  dashboard.od.com;

    ssl_certificate "certs/dashboard.od.com.crt";
    ssl_certificate_key "certs/dashboard.od.com.key";
    ssl_session_cache shared:SSL:1m;
    ssl_session_timeout  10m;
    ssl_ciphers HIGH:!aNULL:!MD5;
    ssl_prefer_server_ciphers on;

    location / {
        proxy_pass http://default_backend_traefik;
        proxy_set_header Host       \$http_host;
        proxy_set_header x-forwarded-for \$proxy_add_x_forwarded_for;
    }
}
EOF

分别重启mfyxw10.mfyxw.com和mfyxw20.mfyxw.com主机的nginx服务

~]# nginx -t
~]# nginx -s reload

11.查看bashboard的pod是否运行起来

在master节点(mfyxw30.mfyxw.com或mfyxw40.mfyxw.com)任意一台执行

[root@mfyxw30 ~]# kubectl get pod -n kube-system

12.访问域名dashboard.od.com

13.查看dashboard的token

kubernetes-dashboard的pod镜像成功运行后，会由kuberneter-dashboard-admin服务帐号自动生成secret，查看secret得到token就可以登录

一个服务帐号，它一定会对应着一个惟一的有服务帐号的secret

在master节点(mfyxw30.mfyxw.com或mfyxw40.mfyxw.com)任意一台执行

[root@mfyxw30 ~]# kubectl get secret -n kube-system
[root@mfyxw30 ~]# kubectl describe secret kubernetes-dashboard-admin-token-94gf4 -n kube-system

14.使用查询到的token登录dashboard

15.查看traefik