第十三章 k8s的GUI资源管理插件--dashboard
1、部署Kubernetes-dashboard
1.1 准备dashboard镜像
在10.4.7.200上操作
[root@hdss7-200 ~]# docker pull k8scn/kubernetes-dashboard-amd64:v1.8.3
[root@hdss7-200 ~]# docker images|grep dashboard
k8scn/kubernetes-dashboard-amd64 v1.8.3 fcac9aa03fd6 3 years ago 102MB
[root@hdss7-200 ~]# docker tag k8scn/kubernetes-dashboard-amd64:v1.8.3 harbor.od.com/public/dashboard:v1.8.3
[root@hdss7-200 ~]# docker push harbor.od.com/public/dashboard:v1.8.3
1.2 准备dashboard资源配置清单
[root@hdss7-200 ~]# mkdir /data/k8s-yaml/dashboard
[root@hdss7-200 ~]# cd /data/k8s-yaml/dashboard/
创建rbac.yaml
[root@hdss7-200 dashboard]# vim 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
创建dp.yaml
[root@hdss7-200 dashboard]# vim 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"
imagePullSecrets:
- name: harbor
创建svc.yaml
[root@hdss7-200 dashboard]# vim 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
创建ingress.yaml
[root@hdss7-200 dashboard]# vim 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
2.3 依次创建资源
在任意一个运算节点操作
[root@hdss7-21 ~]# 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@hdss7-21 ~]# kubectl apply -f http://k8s-yaml.od.com/dashboard/dp.yaml
deployment.apps/kubernetes-dashboard created
[root@hdss7-21 ~]# kubectl apply -f http://k8s-yaml.od.com/dashboard/svc.yaml
service/kubernetes-dashboard created
[root@hdss7-21 ~]# kubectl apply -f http://k8s-yaml.od.com/dashboard/ingress.yaml
ingress.extensions/kubernetes-dashboard created
2.4 查看资源
如下，dashboard资源均已被创建
查看pod
[root@hdss7-21 ~]# kubectl get pod -n kube-system|grep dashboard
kubernetes-dashboard-99ff79fcd-5f6pg 1/1 Running 0 2m45s
查看svc
[root@hdss7-21 ~]# kubectl get svc -n kube-system|grep dashboard
kubernetes-dashboard ClusterIP 192.168.250.65 <none> 443/TCP 3m18s
查看ingress
[root@hdss7-21 ~]# kubectl get ingress -n kube-system|grep dashboard
kubernetes-dashboard dashboard.od.com 80 3m23s
2、配置解析域名
在10.4.7.11上操作
[root@hdss7-11 ~]# vim /var/named/od.com.zone
$ORIGIN od.com.
$TTL 600 ; 10 minutes
@ IN SOA dns.od.com. dnsadmin.od.com. (
2020010505 ; serial
10800 ; refresh (3 hours)
900 ; retry (15 minutes)
604800 ; expire (1 week)
86400 ; minimum (1 day)
)
NS dns.od.com.
$TTL 60 ; 1 minute
dns A 10.4.7.11
harbor A 10.4.7.200
k8s-yaml A 10.4.7.200
traefik A 10.4.7.10
dashboard A 10.4.7.10
[root@hdss7-11 ~]# systemctl restart named
[root@hdss7-11 ~]# dig -t A dashboard.od.com @10.4.7.11 +short
10.4.7.10
运算节点解析
[root@hdss7-21 ~]# dig -t A dashboard.od.com @192.168.0.2 +short
10.4.7.10
3、配置反向代理认证
3.1 自签证书
在10.4.7.200上操作
[root@hdss7-200 certs]# (umask 007;openssl genrsa -out dashboard.od.com.key 2048)
Generating RSA private key, 2048 bit long modulus
..........................................................+++
..................................................................................................................................................................................................................+++
e is 65537 (0x10001)
[root@hdss7-200 certs]# [root@hdss7-200 certs]# openssl req -new -key dashboard.od.com.key -out dashboard.od.com.csr -subj "/CN=*.od.com/C=CN/ST=BeiJing/L=Beijing/O=od/OU=ops"
[root@hdss7-200 certs]# openssl x509 -req -in dashboard.od.com.csr -CA ca.pem -CAkey ca-key.pem -CAcreateserial -out dashboard.od.com.crt -days 3650
Signature ok
subject=/CN=*.od.com/C=CN/ST=BeiJing/L=Beijing/O=od/OU=ops
Getting CA Private Key
[root@hdss7-200 certs]# ls |grep dashboard
dashboard.od.com.crt
dashboard.od.com.csr
dashboard.od.com.key
[root@hdss7-200 certs]# cfssl-certinfo -cert dashboard.od.com.crt
3.2 拉取证书
在10.4.7.11/12上都要操作
[root@hdss7-11 ~]# mkdir /etc/nginx/certs/
[root@hdss7-11 ~]# cd /etc/nginx/certs/
[root@hdss7-11 certs]# scp root@10.4.7.200:/opt/certs/dashboard.od.com.key .
[root@hdss7-11 certs]# scp root@10.4.7.200:/opt/certs/dashboard.od.com.crt .
3.3 配置nginx代理，使用https
在10.4.7.11/12两台代理服务器上操作
[root@hdss7-11 ~]# vim /etc/nginx/conf.d/dashboard.conf
server {
listen 80;
server_name dashboard.od.com;
rewrite ^(.*)$ 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;
}
}
[root@hdss7-11 certs]# nginx -t
nginx: the configuration file /etc/nginx/nginx.conf syntax is ok
nginx: configuration file /etc/nginx/nginx.conf test is successful
[root@hdss7-11 certs]# nginx -s reload
4、浏览器访问
尝试访问dashboard页面http://dashboard.od.com/
在运算节点上查看登录令牌token
[root@hdss7-21 ~]# kubectl get secret -n kube-system
NAME TYPE DATA AGE
coredns-token-xkclr kubernetes.io/service-account-token 3 3d22h
default-token-xqn4c kubernetes.io/service-account-token 3 10d
kubernetes-dashboard-admin-token-mhmvg kubernetes.io/service-account-token 3 10m
kubernetes-dashboard-key-holder Opaque 2 23h
traefik-ingress-controller-token-dr7cs kubernetes.io/service-account-token 3 31m
[root@hdss7-21 ~]# kubectl describe secret kubernetes-dashboard-admin-token-mhmvg -n kube-system
Name: kubernetes-dashboard-admin-token-mhmvg
Namespace: kube-system
Labels: <none>
Annotations: kubernetes.io/service-account.name: kubernetes-dashboard-admin
kubernetes.io/service-account.uid: d15809d2-ebb8-11eb-bb04-000c29e396b1
Type: kubernetes.io/service-account-token
Data
====
ca.crt: 1346 bytes
namespace: 11 bytes
token: eyJhbGciOiJSUzI1NiIsImtpZCI6IiJ9.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.Uc6nhJprnjerB4IaTxMlDwVv_fE_mFwyikAB7wA9ZLyIh79a_KDGS--bZu_L0tfoctb9cpn3nYrwfnkB5C6Iie-3DQTbRoygOptORvh5Q3HwBvkHUo54HK4ylFK7oukaZJW0Mer_5ZnWWdRPy764pOUGi3Cy3pYrv6dWX5ZCTEugjJmskLfwDfr8cWVEkH6qQwdTpVmZuX-RlgoVLI2ZnPjvtOPu_bUerZXLyC013RfcTvmN5rXrXOoNUBSNUIHaMEj4K9o5PtTMfK_H4PliK_4Tl-LASJu_zOCRuZZHHfqYvqTDr1tf03RrlTxcQJfuWgGa7kBrXF76lOdI7xwZoA
使用令牌登录就用上面的token信息就行
直接跳过就行了，如下是dashboard的页面详情
5、使用1.10.1版本镜像
在10.4.7.200服务器上
修改dp.yaml文件中的镜像（经常版本修改程1.10.1）
[root@hdss7-200 dashboard]# vim dp.yaml
image: harbor.od.com/public/dashboard:v1.10.1
保存退出
在任意运算节点上（10.4.7.21、22）
删除原来的deployment资源
[root@hdss7-21 ~]# kubectl delete -f http://k8s-yaml.od.com/dashboard/dp.yaml
deployment.apps "kubernetes-dashboard" deleted
创建新的deployment资源
[root@hdss7-21 ~]# kubectl apply -f http://k8s-yaml.od.com/dashboard/dp.yaml
deployment.apps/kubernetes-dashboard created
查看token
[root@hdss7-21 ~]# kubectl get secret -n kube-system
NAME TYPE DATA AGE
coredns-token-xkclr kubernetes.io/service-account-token 3 4d18h
default-token-xqn4c kubernetes.io/service-account-token 3 11d
kubernetes-dashboard-admin-token-mhmvg kubernetes.io/service-account-token 3 19h
kubernetes-dashboard-key-holder Opaque 2 42h
traefik-ingress-controller-token-dr7cs kubernetes.io/service-account-token 3 19h
[root@hdss7-21 ~]# kubectl describe secret kubernetes-dashboard-admin-token-mhmvg -n kube-system
Name: kubernetes-dashboard-admin-token-mhmvg
Namespace: kube-system
Labels: <none>
Annotations: kubernetes.io/service-account.name: kubernetes-dashboard-admin
kubernetes.io/service-account.uid: d15809d2-ebb8-11eb-bb04-000c29e396b1
Type: kubernetes.io/service-account-token
Data
====
ca.crt: 1346 bytes
namespace: 11 bytes
token: eyJhbGciOiJSUzI1NiIsImtpZCI6IiJ9.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.Uc6nhJprnjerB4IaTxMlDwVv_fE_mFwyikAB7wA9ZLyIh79a_KDGS--bZu_L0tfoctb9cpn3nYrwfnkB5C6Iie-3DQTbRoygOptORvh5Q3HwBvkHUo54HK4ylFK7oukaZJW0Mer_5ZnWWdRPy764pOUGi3Cy3pYrv6dWX5ZCTEugjJmskLfwDfr8cWVEkH6qQwdTpVmZuX-RlgoVLI2ZnPjvtOPu_bUerZXLyC013RfcTvmN5rXrXOoNUBSNUIHaMEj4K9o5PtTMfK_H4PliK_4Tl-LASJu_zOCRuZZHHfqYvqTDr1tf03RrlTxcQJfuWgGa7kBrXF76lOdI7xwZoA
访问新的dashboard页面，登录页面没有skip选项，必须要使用密码文件或者token令牌进行登录，增加了安全性
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