k8s的GUI资源管理插件-Dashboard

安装部署GUI插件:

准备镜像:

[root@hdss7-200 ~]# docker pull k8scn/kubernetes-dashboard-amd64:v1.8.3
v1.8.3: Pulling from k8scn/kubernetes-dashboard-amd64
a4026007c47e: Pull complete
Digest: sha256:ebc993303f8a42c301592639770bd1944d80c88be8036e2d4d0aa116148264ff
Status: Downloaded newer image for k8scn/kubernetes-dashboard-amd64:v1.8.3
docker.io/k8scn/kubernetes-dashboard-amd64:v1.8.3
[root@hdss7-200 ~]# docker images |grep dash
[root@hdss7-200 ~]# docker push harbor.od.com/public/dashboard:v1.8.3
The push refers to repository [harbor.od.com/public/dashboard]
23ddb8cbb75a: Mounted from public/dashboard.od.com
v1.8.3: digest: sha256:ebc993303f8a42c301592639770bd1944d80c88be8036e2d4d0aa116148264ff size: 529

准备资源配置清单:

mkdir -p /data/k8s-yaml/dashboard
# cat rbac.yaml
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
# cat dp.yaml
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:v1.8.3
        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"
# cat svc.yaml
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
# cat ingress.yaml
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

应用资源配置清单:

[root@hdss7-22 ~]# kubectl apply -f http://k8s-yaml.od.com/dashboard/rbac.yaml
serviceaccount/kubernetes-dashboard-admin created
clusterrolebinding.rbac.authorization.k8s.io/kubernetes-dashboard-admin created
[root@hdss7-22 ~]# kubectl apply -f http://k8s-yaml.od.com/dashboard/dp.yaml
deployment.apps/kubernetes-dashboard created
[root@hdss7-22 ~]# kubectl apply -f http://k8s-yaml.od.com/dashboard/svc.yaml
service/kubernetes-dashboard created
[root@hdss7-22 ~]# kubectl apply -f http://k8s-yaml.od.com/dashboard/ingress.yaml
ingress.extensions/kubernetes-dashboard created
[root@hdss7-22 ~]# kubectl get pod -n kube-system
NAME                                    READY   STATUS    RESTARTS   AGE
coredns-6b6c4f9648-j7cv9                1/1     Running   0          5h8m
kubernetes-dashboard-76dcdb4677-vhf5p   1/1     Running   0          8m24s


到我们自建的dns上面配置域名解析:

[root@hdss7-11 named]# cat od.com.zone
$ORIGIN od.com.
$TTL 600; 10 minutes
@   IN SOAdns.od.com. dnsadmin.od.com. (
2019111005 ; 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    10.4.7.11
harbor             A    10.4.7.200
k8s-yaml             A    10.4.7.200
fraefik              A    10.4.7.11
dashboard              A    10.4.7.11
[root@hdss7-11 named]# systemctl restart named
[root@hdss7-11 named]# dig -t A dashboard.od.com +short
10.4.7.11


浏览器访问:

k8s的GUI资源管理插件-Dashboard

我们先点击跳过:

k8s的GUI资源管理插件-Dashboard

k8s自1.6版本起默认使用基于角色的访问控制即RBAC,相较于ABAC(基于属性的访问控制)和webHook等鉴权机制,对集群中的资源的权限实现了完整覆盖,并且支持权限的动态调整,无需重启apiserver


可以使用kubectl查看k8s集群中所有权限:

[root@hdss7-22 ~]# kubectl get clusterrole
NAME                                                                   AGE
admin                                                                  2d14h
cluster-admin                                                          2d14h
edit                                                                   2d14h
system:aggregate-to-admin                                              2d14h
system:aggregate-to-edit                                               2d14h
system:aggregate-to-view                                               2d14h 
system:auth-delegator                                                  2d14h
system:basic-user                                                      2d14h
system:certificates.k8s.io:certificatesigningrequests:nodeclient       2d14h
system:certificates.k8s.io:certificatesigningrequests:selfnodeclient   2d14h
system:controller:attachdetach-controller                              2d14h
system:controller:certificate-controller                               2d14h
system:controller:clusterrole-aggregation-controller                   2d14h
system:controller:cronjob-controller                                   2d14h
system:controller:daemon-set-controller                                2d14h
system:controller:deployment-controller                                2d14h

我们使用openssl给dashboard的域名配置自签的https证书,使其支持https访问:

[root@hdss7-200 certs]# (umask 077; openssl genrsa -out dashboard.od.com.key 2048)
Generating RSA private key, 2048 bit long modulus
................................................+++
..........................................+++
e is 65537 (0x10001)
[root@hdss7-200 certs]#
[root@hdss7-200 certs]#
[root@hdss7-200 certs]# ll
总用量 104
-rw-r--r-- 1 root root 1257 3月  26 22:54 apiserver.csr
-rw-r--r-- 1 root root  587 3月  26 22:52 apiserver-csr.json
-rw------- 1 root root 1679 3月  26 22:54 apiserver-key.pem
-rw-r--r-- 1 root root 1602 3月  26 22:54 apiserver.pem
-rw-r--r-- 1 root root  836 3月  25 21:37 ca-config.json
-rw-r--r-- 1 root root  993 3月  25 21:19 ca.csr
-rw-r--r-- 1 root root  326 3月  25 21:18 ca-csr.json
-rw------- 1 root root 1675 3月  25 21:19 ca-key.pem
-rw-r--r-- 1 root root 1338 3月  25 21:19 ca.pem
-rw-r--r-- 1 root root  993 3月  25 23:12 client.csr
-rw-r--r-- 1 root root  280 3月  25 23:07 client-csr.json
-rw------- 1 root root 1679 3月  25 23:12 client-key.pem
-rw-r--r-- 1 root root 1363 3月  25 23:12 client.pem
-rw------- 1 root root 1675 3月  28 14:39 dashboard.od.com.key
-rw-r--r-- 1 root root 1062 3月  25 21:41 etcd-peer.csr
-rw-r--r-- 1 root root  363 3月  25 21:38 etcd-peer-csr.json
-rw------- 1 root root 1679 3月  25 21:41 etcd-peer-key.pem
-rw-r--r-- 1 root root 1424 3月  25 21:41 etcd-peer.pem
-rw-r--r-- 1 root root 1123 3月  26 22:55 kubelet.csr
-rw-r--r-- 1 root root  469 3月  26 22:52 kubelet-csr.json
-rw------- 1 root root 1675 3月  26 22:55 kubelet-key.pem
-rw-r--r-- 1 root root 1472 3月  26 22:55 kubelet.pem
-rw-r--r-- 1 root root 1005 3月  26 22:36 kube-proxy-client.csr
-rw------- 1 root root 1679 3月  26 22:36 kube-proxy-client-key.pem
-rw-r--r-- 1 root root 1375 3月  26 22:36 kube-proxy-client.pem
-rw-r--r-- 1 root root  267 3月  26 22:33 kube-proxy-csr.json
[root@hdss7-200 certs]# openssl req -new -key dashboard.od.com.key -out dashboard.od.com.csr -subj "/CN=dashboard.od.com/C=CN/ST=BJ/L=Beijing/O=DayaZZ/OU=ops"
[root@hdss7-200 certs]# openssl x509 -req -in dashboard.od.com.csr -CA ca.pem -CAkey ca-key.pem -CAcreateserial -out dashboard.od.com.crt -days 3650
Signature ok
subject=/CN=dashboard.od.com/C=CN/ST=BJ/L=Beijing/O=DayaZZ/OU=ops
Getting CA Private Key


将https证书拷贝到11主机上:

[root@hdss7-11 nginx]# mkdir -p /etc/nginx/certs
[root@hdss7-11 certs]# ll
总用量 8
-rw-r--r-- 1 root root 1188 3月  28 14:42 dashboard.od.com.crt
-rw------- 1 root root 1675 3月  28 14:43 dashboard.od.com.key
[root@hdss7-11 certs]# pwd
/etc/nginx/certs
[root@hdss7-11 conf.d]# cat dashboard.od.com.conf
server {
    listen       80;
    server_name  dashboard.od.com 116.85.5.4;
    rewrite ^(.*)$ https://${server_name}$1 permanent;
}
server {
    listen       443 ssl;
    server_name  dashboard.od.com 116.85.5.4;
    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       dashboard.od.com;
        proxy_set_header x-forwarded-for $proxy_add_x_forwarded_for;
    }
}
nginx -s reload

然后取出我们的dashboard令牌:

[root@hdss7-22 ~]# kubectl get secret -n kube-system
NAME                                     TYPE                                  DATA   AGE
coredns-token-dkd6k                      kubernetes.io/service-account-token   3      6h25m
default-token-q462s                      kubernetes.io/service-account-token   3      41h
kubernetes-dashboard-admin-token-npgjj   kubernetes.io/service-account-token   3      84m
kubernetes-dashboard-key-holder          Opaque                                2      84m
traefik-ingress-controller-token-w8thz   kubernetes.io/service-account-token   3      5h12m
[root@hdss7-22 ~]# kubectl describe kubernetes-dashboard-admin-token-npgjj -n kube-system
error: the server doesn't have a resource type "kubernetes-dashboard-admin-token-npgjj"
[root@hdss7-22 ~]# kubectl describe secret kubernetes-dashboard-admin-token-npgjj -n kube-system
Name:         kubernetes-dashboard-admin-token-npgjj
Namespace:    kube-system
Labels:       <none>
Annotations:  kubernetes.io/service-account.name: kubernetes-dashboard-admin
              kubernetes.io/service-account.uid: b36a01a3-a99f-4cf4-ad53-df8e55e26aec
Type:  kubernetes.io/service-account-token
Data
====
ca.crt:     1338 bytes
namespace:  11 bytes
token:      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.iQSC15Mjo1MHjhQ56f3muLUHbfGfOWAIFUiwvjB_qer1xAAc_k3GB-G2ESRuKJQgbI3L9WBICAG_hXKTFWpKXwY2BKoma7XKFUf3662PME4p2QIdCyESbxIdVWdfwu7fw_S6mYc2R_uIoVOZjlJ2DlrUhs-KyBBzOIazOuXgOcH08Igpj2xBDiXKEPh8IQOhL8O9dmPWMXQWAboDvEDY23WDgBHLQofmtfx-o9IEb_Cuh9xhelbPNHfiSFVVvlBQBmOynz7OpNYsIJ1T1hcbfg0aXMv0NIIk13HrUSXcCL3PUnrWvtVdOjoed-seEnqmj4B6Eqif2p0arK1SF2S_wQ

复制token,到dashboard的登录页面,粘贴进去:

k8s的GUI资源管理插件-Dashboard


如下表示登录成功:

k8s的GUI资源管理插件-Dashboard



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