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分享两个有利于K8S的工具
目录
分享两个有利于K8S的工具
一、部署Dashboard（主节点）
介绍
1.1、查看集群状态
1.2、下载yaml文件并运行Dashboard
1.3、部署服务
1.4、创建访问账户、获取token（令牌）
1.5、浏览器访问Dashboard
二、安装kubectl自动补全命令（主节点）
2.1、安装bash-completion工具
2.2、执行bash_completion
2.3、加载kubecel completion
一、部署Dashboard（主节点）
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前提部署好一个Kubernetes集群，可以按照我上一章的文章进行部署
介绍
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Kubernetes Dashboard是一个用于可视化管理和监控Kubernetes集群的Web用户界面。它提供了一种图形化的方式来查看和管理集群中的资源、应用程序和服务。使得用户可以更方便地进行操作和监控
1.1、查看集群状态
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确保状态为Ready
[root@k8s-master ~]# kubectl get nodes
NAME STATUS ROLES AGE VERSION
k8s-master Ready master 7m49s v1.18.0
k8s-node01 Ready <none> 7m20s v1.18.0
k8s-node02 Ready <none> 7m18s v1.18.01.2、下载yaml文件并运行Dashboard
# 下载yaml文件，如果下载失败那就多下载几次
[root@k8s-master ~]# wget https://raw.githubusercontent.com/kubernetes/dashboard/v2.0.0/aio/deploy/recommended.yaml
# 修改kubernetes-dashboard的Service类型
[root@k8s-master ~]# vim recommended.yaml
apiVersion: v1
kind: Namespace
metadata:name: kubernetes-dashboard
---
apiVersion: v1
kind: ServiceAccount
metadata:labels:k8s-app: kubernetes-dashboardname: kubernetes-dashboardnamespace: kubernetes-dashboard
---
kind: Service
apiVersion: v1
metadata:labels:k8s-app: kubernetes-dashboardname: kubernetes-dashboardnamespace: kubernetes-dashboard
spec:type: NodePort # 增加ports:- port: 443targetPort: 8443nodePort: 30009 # 增加selector:k8s-app: kubernetes-dashboard
## 部分内容省略1.3、部署服务
[root@k8s-master ~]# kubectl apply -f recommended.yaml
namespace/kubernetes-dashboard created
serviceaccount/kubernetes-dashboard created
service/kubernetes-dashboard created
secret/kubernetes-dashboard-certs created
secret/kubernetes-dashboard-csrf created
secret/kubernetes-dashboard-key-holder created
configmap/kubernetes-dashboard-settings created
role.rbac.authorization.k8s.io/kubernetes-dashboard created
clusterrole.rbac.authorization.k8s.io/kubernetes-dashboard created
rolebinding.rbac.authorization.k8s.io/kubernetes-dashboard created
clusterrolebinding.rbac.authorization.k8s.io/kubernetes-dashboard created
deployment.apps/kubernetes-dashboard created
service/dashboard-metrics-scraper created
deployment.apps/dashboard-metrics-scraper created
# 查看kubernetes-dashboard命令空间下的资源
[root@k8s-master ~]# kubectl get pod,svc -n kubernetes-dashboard
NAME READY STATUS RESTARTS AGE
pod/dashboard-metrics-scraper-6b4884c9d5-787lm 0/1 ImagePullBackOff 0 41s
pod/kubernetes-dashboard-7b544877d5-6l4tw 0/1 ErrImagePull 0 41s
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
service/dashboard-metrics-scraper ClusterIP 10.111.21.8 <none> 8000/TCP 41s
service/kubernetes-dashboard NodePort 10.106.240.109 <none> 443:30009/TCP 41s1.4、创建访问账户、获取token（令牌）
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Dashboard支持kuberconfig和Token两种认证方式，这里选择Token认证方式登录
# 创建账号dashboard-admin
[root@k8s-master ~]# kubectl create serviceaccount dashboard-admin -n kubernetes-dashboard
serviceaccount/dashboard-admin created
# 账号授权，绑定cluster-admin角色
[root@k8s-master ~]# kubectl create clusterrolebinding dashboard-admin --clusterrole=cluster-admin --serviceaccount=kubernetes-dashboard:dashboard-admin
clusterrolebinding.rbac.authorization.k8s.io/dashboard-admin created
# 获取账号token
[root@k8s-master ~]# kubectl describe secrets -n kubernetes-dashboard $(kubectl -n kubernetes-dashboard get secret| awk '/dashboard-admin/ {print $1}')
Name: dashboard-admin-token-dtb6c
Namespace: kubernetes-dashboard
Labels: <none>
Annotations: kubernetes.io/service-account.name: dashboard-adminkubernetes.io/service-account.uid: b5885626-bc73-45ba-a7eb-b327fa576d95
Type: kubernetes.io/service-account-token
Data
====
ca.crt: 1025 bytes
namespace: 20 bytes
###################################################################
token: eyJhbGciOiJSUzI1NiIsImtpZCI6IndLcjVNVUljX0dIVzZEUWhrNUR1cTh6Ums0RDQ4VGsxV204eVZrcERwWEUifQ.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.PLD8qEoYxGWE0gz5YmDUcXjYMx6QeCnhsbY8C60BivK5tlm4eqk84pMjsI5BrJs97tVpIb6a9h1lPBrdcR70QfbdFYPW2Qd3Za2kKbK5QModo_ivC1P3RSt0YZDfFLiXGlS44_uQjVEMJZqLDcmNYFPRgEeIicQH3J9FtKvDqdkMXu2kM6XmBqa2G1u8s-JqTVUC_y_OPJUB8W92W1BA6QD7WY7iAkpp78-Jf33qfUdWak8xwdmps5-LSxg3_22hPC3rQ06hD-RP6hl7dE-udHeJRZAMwNFPlZwSi7aNfP8MChBjKP5eW323S0bg820qzGvRZLru9VeHBjxsS_COsA
###################################################################1.5、浏览器访问Dashboard
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访问地址：https://192.168.93.101:30009
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如果访问不到那就是镜像没拉取下来，可以使用魔法或者私信评论免费提供
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出现以下的页面代表成功
二、安装kubectl自动补全命令（主节点）
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安装之后再使用kubectl命令的时候就可以使用tab键自动补全命令了
2.1、安装bash-completion工具
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通常安装在所有master节点上
[root@k8s-master ~]# yum -y install bash-completion2.2、执行bash_completion
[root@k8s-master ~]# source /usr/share/bash-completion/bash_completion 2.3、加载kubecel completion
# 在当前bash环境中临时设置命令补全
[root@k8s-master ~]# source <(kubectl completion bash)
# 在当前bash环境中永久设置命令补全
[root@k8s-master ~]# echo "source <(kubectl completion bash)" >> ~/.bashrc
[root@k8s-master ~]# source ~/.bashrc