操作环境

kuberetes多节点部署环境下：
负载均衡lb
Nginx01：14.0.0.77/24
Nginx02：14.0.0.88/24
Master节点
master：14.0.0.11/24
master02：14.0.0.66/24
Node节点
node01：14.0.0.33/24
node02：14.0.0.55/24

1、两个master节点检查pod资源是否正常

[root@master ~]# kubectl get nodes
NAME STATUS ROLES AGE VERSION
14.0.0.33 NotReady <none> 8d v1.12.3
14.0.0.55 NotReady <none> 8d v1.12.3

如果是noready ，漂移地址没了，则在两个nginx节点重启keepalived服务

systemctl restart keepalived

再在master端查看：

[root@master ~]# kubectl get nodes
NAME STATUS ROLES AGE VERSION
14.0.0.33 Ready <none> 8d v1.12.3
14.0.0.55 Ready <none> 8d v1.12.3

[root@master ~]# kubectl get pods
NAME READY STATUS RESTARTS AGE
nginx-dbddb74b8-t45hv 1/1 Running 0 14h

2、master节点上创建dashboard工作目录，并拷贝部署web界面所需的文件到指定目录

//在master上操作
//创建dashborad工作目录
[root@master ~]# cd k8s
[root@master k8s]# mkdir dashboard

//拷贝官方的文件（直接复制即可）
https://github.com/kubernetes/kubernetes/tree/master/cluster/addons/dashboard

• configmap：配置文件
• deployment：部署
• rbac：授权管理，k8s安全框架
• serect：身份验证
• service：服务

现在五个合成了一个里面，需要自己辨别

从官方网站下载资源太慢了：
解决方法：
注册一个网站–码云（gitee)，先将github的资源下载到gitee上，再从gitee下载资源

我这里提前下载好了文件，就直接拖进来了（一共6个yaml文件）：
链接：https://pan.baidu.com/s/1R64YwY5ExgNVuJeG3DJxWw
提取码：7vvr

• dashboard-configmap.yaml
• dashboard-rbac.yaml
• dashboard-service.yaml
• dashboard-controller.yaml
• dashboard-secret.yaml
• k8s-admin.yaml

[root@master dashboard]# ls
dashboard-configmap.yaml   dashboard-rbac.yaml  dashboard-service.yaml
dashboard-controller.yaml  dashboard-secret.yaml  k8s-admin.yaml

3、根据上传的文件创建相应的pod（顺序不能乱）

#创建访问控制的pod
[root@master dashboard]# kubectl create -f dashboard-rbac.yaml 
role.rbac.authorization.k8s.io/kubernetes-dashboard-minimal created
rolebinding.rbac.authorization.k8s.io/kubernetes-dashboard-minimal created

#创建安全的pod
[root@master dashboard]# kubectl create -f dashboard-secret.yaml 
secret/kubernetes-dashboard-certs created
secret/kubernetes-dashboard-key-holder created

#创建配置的pod
[root@master dashboard]# kubectl create -f dashboard-configmap.yaml 
configmap/kubernetes-dashboard-settings created

创建控制器的pod
[root@master dashboard]# kubectl create -f dashboard-controller.yaml 
serviceaccount/kubernetes-dashboard created
deployment.apps/kubernetes-dashboard created

创建service服务pod
[root@master dashboard]# kubectl create -f dashboard-service.yaml 
service/kubernetes-dashboard created

完成后查看创建在指定的kube-system命名空间下（-n namespace指定命名空间）

[root@master dashboard]# kubectl get pods -n kube-system
NAME                                    READY   STATUS    RESTARTS   AGE
kubernetes-dashboard-65f974f565-bh6dm   1/1     Running   0          2m36s

其他查看

##查看命名空间
[root@master dashboard]# kubectl get configMap -n kube-system
NAME                                 DATA   AGE
extension-apiserver-authentication   1      8d
kubernetes-dashboard-settings        0      5m16s

##查看service资源（Service 或者 svc）
[root@master dashboard]# kubectl get Service -n kube-system
NAME                   TYPE       CLUSTER-IP   EXTERNAL-IP   PORT(S)         AGE
kubernetes-dashboard   NodePort   10.0.0.105   <none>        443:30001/TCP   10m
[root@master dashboard]# kubectl get Service -n kube-system -o wide
NAME                   TYPE       CLUSTER-IP   EXTERNAL-IP   PORT(S)         AGE   SELECTOR
kubernetes-dashboard   NodePort   10.0.0.105   <none>        443:30001/TCP   10m   k8s-app=kubernetes-dashboard
[root@master dashboard]# kubectl get svc -n kube-system -o wide
NAME                   TYPE       CLUSTER-IP   EXTERNAL-IP   PORT(S)         AGE   SELECTOR
kubernetes-dashboard   NodePort   10.0.0.105   <none>        443:30001/TCP   10m   k8s-app=kubernetes-dashboard

##查看pods资源
[root@master dashboard]# kubectl get pods -n kube-system -o wide
NAME                                    READY   STATUS    RESTARTS   AGE   IP            NODE        NOMINATED NODE
kubernetes-dashboard-65f974f565-ww6ll   1/1     Running   0          11m   172.17.41.2   14.0.0.55   <none>

##同时查看（中间加逗号）
[root@master dashboard]# kubectl get pods -n kube-system -o wide
NAME                                    READY   STATUS    RESTARTS   AGE   IP            NODE        NOMINATED NODE
kubernetes-dashboard-65f974f565-ww6ll   1/1     Running   0          11m   172.17.41.2   14.0.0.55   <none>
[root@master dashboard]# kubectl get pods,svc -n kube-system -o wide
NAME                                        READY   STATUS    RESTARTS   AGE   IP            NODE        NOMINATED NODE
pod/kubernetes-dashboard-65f974f565-ww6ll   1/1     Running   0          13m   172.17.41.2   14.0.0.55   <none>

NAME                           TYPE       CLUSTER-IP   EXTERNAL-IP   PORT(S)         AGE   SELECTOR
service/kubernetes-dashboard   NodePort   10.0.0.105   <none>        443:30001/TCP   13m   k8s-app=kubernetes-dashboard

4、访问web界面，并解决访问问题

访问 https://14.0.0.55:30001/，打开开发者工具，查看security发现缺少证书

换一个浏览器可能就行，谷歌浏览器不行，
解决方法：自己做证书。

为谷歌浏览器写一个证书

[root@master dashboard]# vim dashboard-cert.sh
cat > dashboard-csr.json <<EOF
{
   "CN": "Dashboard",
   "hosts": [],
   "key": {
       "algo": "rsa",
       "size": 2048
   },
   "names": [
       {
           "C": "CN",
           "L": "BeiJing",
           "ST": "BeiJing"
       }
   ]
}
EOF

K8S_CA=$1
cfssl gencert -ca=$K8S_CA/ca.pem -ca-key=$K8S_CA/ca-key.pem -config=$K8S_CA/ca-config.json -profile=kubernetes dashboard-csr.json | cfssljson -bare dashboard
kubectl delete secret kubernetes-dashboard-certs -n kube-system
kubectl create secret generic kubernetes-dashboard-certs --from-file=./ -n kube-system

Bash执行/root/k8s/k8s-cert/路径下的脚本，生成证书到指定目录

[root@master dashboard]# bash dashboard-cert.sh /root/k8s/k8s-cert/
2020/10/08 20:16:05 [INFO] generate received request
2020/10/08 20:16:05 [INFO] received CSR
2020/10/08 20:16:05 [INFO] generating key: rsa-2048
2020/10/08 20:16:05 [INFO] encoded CSR
2020/10/08 20:16:05 [INFO] signed certificate with serial number 30412001701878355171255459809575532049300388054
2020/10/08 20:16:05 [WARNING] This certificate lacks a "hosts" field. This makes it unsuitable for
websites. For more information see the Baseline Requirements for the Issuance and Management
of Publicly-Trusted Certificates, v.1.1.6, from the CA/Browser Forum (https://cabforum.org);
specifically, section 10.2.3 ("Information Requirements").
secret "kubernetes-dashboard-certs" deleted
secret/kubernetes-dashboard-certs created

修改dashboard-controller.yaml文件，添加密钥认证路径

[root@master dashboard]# vim dashboard-controller.yaml 
......
        args:
          # PLATFORM-SPECIFIC ARGS HERE
          - --auto-generate-certificates  ##这行下面添加两行内容
          - --tls-key-file=dashboard-key.pem       
          - --tls-cert-file=dashboard.pem

重新部署

• 注意：当apply不生效时，先使用delete清除资源，再apply创建资源

[root@master dashboard]# kubectl apply -f dashboard-controller.yaml 
Warning: kubectl apply should be used on resource created by either kubectl create --save-config or kubectl apply
serviceaccount/kubernetes-dashboard configured
Warning: kubectl apply should be used on resource created by either kubectl create --save-config or kubectl apply
deployment.apps/kubernetes-dashboard configured

再次访问web界面

5、选择使用令牌访问

生成令牌

[root@master dashboard]# kubectl create -f k8s-admin.yaml 
serviceaccount/dashboard-admin created
clusterrolebinding.rbac.authorization.k8s.io/dashboard-admin created

保存

[root@master dashboard]# kubectl get secret -n kube-system
NAME                               TYPE                                  DATA   AGE
dashboard-admin-token-f9qcm        kubernetes.io/service-account-token   3      49s
default-token-pkr55                kubernetes.io/service-account-token   3      9d
kubernetes-dashboard-certs         Opaque                                11     5h29m
kubernetes-dashboard-key-holder    Opaque                                2      5h59m
kubernetes-dashboard-token-q2slk   kubernetes.io/service-account-token   3      5h59m

查看令牌（token下面的，复制下方令牌，填写到浏览器中即可）

[root@master dashboard]# kubectl describe secret dashboard-admin-token-f9qcm -n kube-system
Name:         dashboard-admin-token-f9qcm
Namespace:    kube-system
Labels:       <none>
Annotations:  kubernetes.io/service-account.name: dashboard-admin
              kubernetes.io/service-account.uid: 012c694d-098e-11eb-b94c-000c29b1e929

Type:  kubernetes.io/service-account-token

Data
====
ca.crt:     1359 bytes
namespace:  11 bytes
token:      eyJhbGciOiJSUzI1NiIsImtpZCI6IiJ9.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.vbFYx081ltJkB5IakAKMitqHk5G6UjL4_JCiSHVSJJ4SLTL9x_M8Ppw6n6eAlljfWRj_ZwDIbfK6D48SpERqQgxJ3W9YALtSLy3SH24l_Wh-oRpcvVnIre6763TOT0oak2bbvCcMc0LczuUsQVEGpRSWo2AyJTaw3Vmgepn0lTsh2G0gXSbp5seYOc6uXDWH4GFG0txm75DCTTKNcRoiLgwOtsYBRS59A0XSAyWI1bEbw3LvVoOrSIZqvt3jasZJz9JioWztAVXdMj28pGOMhGrixBBX61mW9-MKffNOEvFZDql6lKi34gRuMQjMxio2tAAI8E0ymxxH1mTaX48RJQ

这就是kubernetes网站：

• 默认三个命名空间：
  • kube-public
  • default
  • kube-system

6、小结

k8s创建pod资源有两种方式

1、使用kubectl 命令创建：kubectl run 名称 --image= 镜像

2、使用yaml文件格式进行创建：kubectl create -f yaml文件

重新部署时，当apply不生效时，先使用delete清除资源，再apply创建资源

kubectl apply -f dashboard-controller.yaml 无法显示更改（dashboard-controller.yaml  确定了证书是否生效）
先删除：
kubectl delete -f dashboard-controller.yaml
查看：（又变成151）
kubectl get pods,svc -n kube-system -o wide

查看token：
vim dashboard-controller.yaml
进入谷歌浏览器搜索