主页 » DevOps » Kubernetes 中的 Helm 操作指南:从 Chart 创建到服务回滚常用命令汇总

Kubernetes 中的 Helm 操作指南:从 Chart 创建到服务回滚常用命令汇总

正文

近期文章:Helm 安装+阿里云镜像配置+memcached部署教程,以及kubernetes Helm 自定义 Charts 模板

配置国内存放chart仓库的地址

阿里云仓库(https://kubernetes.oss-cn-hangzhou.aliyuncs.com/charts
官方仓库(https://hub.kubeapps.com/charts/incubator)官方chart仓库,国内可能无法访问。
微软仓库(http://mirror.azure.cn/kubernetes/charts/)这个仓库推荐,基本上官网有的chart这里都有,国内可能无法访问
开源社仓库http://mirror.kaiyuanshe.cn/kubernetes/charts/ 是由中国支持开源的企业,社区及个人所组织的一个开源联盟,旨在推广开源

helm repo add aliyun https://kubernetes.oss-cn-hangzhou.aliyuncs.com/charts
#添加bitnami仓库
helm repo add bitnami https://charts.bitnami.com/bitnami

#更新
[root@master01 ~]# helm repo update
#查看
[root@master01 ~]# helm repo list

查看chart仓库

搜索chart

[root@master01 ~]# helm search repo aliyun|grep jenkins
aliyun/jenkins                	0.13.5       	2.73         	Open source continuous integration server. It s...

下载chart

[root@master01 ~]# helm pull aliyun/jenkins
[root@master01 ~]# ls jenkins-0.13.5.tgz
jenkins-0.13.5.tgz
#解压chart包
[root@master01 ~]# tar zxvf jenkins-0.13.5.tgz

安装chart

[root@master01 jenkins]# helm install jenkins .

创建一个chart,并指定名字

[root@master01 ~]# helm create myapp
Creating myapp
[root@master01 ~]# ls myapp
charts  Chart.yaml  templates  values.yaml

创建一个release实例

[root@master01 ~]# cd myapp
[root@master01 myapp]# helm install myapp .
NAME: myapp
LAST DEPLOYED: Thu Aug 31 18:24:35 2023
NAMESPACE: default
STATUS: deployed
REVISION: 1
NOTES:
1. Get the application URL by running these commands:
  export POD_NAME=$(kubectl get pods --namespace default -l "app.kubernetes.io/name=myapp,app.kubernetes.io/instance=myapp" -o jsonpath="{.items[0].metadata.name}")
  export CONTAINER_PORT=$(kubectl get pod --namespace default $POD_NAME -o jsonpath="{.spec.containers[0].ports[0].containerPort}")
  echo "Visit http://127.0.0.1:8080 to use your application"
  kubectl --namespace default port-forward $POD_NAME 8080:$CONTAINER_PORT

卸载release

[root@master01 myapp]# helm uninstall myapp
release "myapp" uninstalled

检测values.yam语法

[root@master01 ~]# helm lint myapp
==> Linting myapp
[INFO] Chart.yaml: icon is recommended

1 chart(s) linted, 0 chart(s) failed

失败的为0

upgrade 升级 release

[root@master01 myapp]# kubectl get svc
NAME         TYPE        CLUSTER-IP      EXTERNAL-IP   PORT(S)   AGE
myapp        ClusterIP   10.100.221.23   <none>        80/TCP    10h
#myapp type类型为ClusterIP,将其修改为NodePort

[root@master01 myapp]# helm upgrade --set service.type="NodePort" myapp .
Release "myapp" has been upgraded. Happy Helming!
NAME: myapp
LAST DEPLOYED: Thu Aug 31 18:09:10 2023
NAMESPACE: default
STATUS: deployed
REVISION: 2
NOTES:
1. Get the application URL by running these commands:
  export NODE_PORT=$(kubectl get --namespace default -o jsonpath="{.spec.ports[0].nodePort}" services myapp)
  export NODE_IP=$(kubectl get nodes --namespace default -o jsonpath="{.items[0].status.addresses[0].address}")
  echo http://$NODE_IP:$NODE_PORT

#再次查看svc,已经变成NodePort
[root@master01 myapp]# kubectl get svc
NAME         TYPE        CLUSTER-IP      EXTERNAL-IP   PORT(S)        AGE
kubernetes   ClusterIP   10.96.0.1       <none>        443/TCP        2d6h
myapp        NodePort    10.100.221.23   <none>        80:32240/TCP   10h
kubectl get svc

类型已经从ClusterIP变成NodePort

回滚release

helm hisotry 查看历史版本

[root@master01 myapp]# helm history myapp
REVISION	UPDATED                 	STATUS    	CHART      	APP VERSION	DESCRIPTION
1       	Thu Aug 31 07:50:39 2023	superseded	myapp-0.1.0	1.16.0     	Install complete
2       	Thu Aug 31 18:09:10 2023	deployed  	myapp-0.1.0	1.16.0     	Upgrade complete

回滚到版本

[root@master01 myapp]# helm rollback myapp 1
Rollback was a success! Happy Helming!
[root@master01 myapp]# kubectl get svc
NAME         TYPE        CLUSTER-IP      EXTERNAL-IP   PORT(S)   AGE
kubernetes   ClusterIP   10.96.0.1       <none>        443/TCP   2d6h
myapp        ClusterIP   10.100.221.23   <none>        80/TCP    10h
#查看历史版本
[root@master01 myapp]# helm history myapp
REVISION	UPDATED                 	STATUS    	CHART      	APP VERSION	DESCRIPTION
1       	Thu Aug 31 07:50:39 2023	superseded	myapp-0.1.0	1.16.0     	Install complete
2       	Thu Aug 31 18:09:10 2023	superseded	myapp-0.1.0	1.16.0     	Upgrade complete
3       	Thu Aug 31 18:13:53 2023	deployed  	myapp-0.1.0	1.16.0     	Rollback to 1
helm rollback

从上面内容可以看出,已经回滚成功了,且有三个版本

helm 打包Chart

[root@master01 ~]# helm package myapp
Successfully packaged chart and saved it to: /root/myapp-0.1.0.tgz
分享:
Telegram
Twitter
Facebook

发表评论

了解 zhpengfei.com 的更多信息

立即订阅以继续阅读并访问完整档案。

Continue reading

解锁流媒体/ChatGPT

智能分流/仅代理海外网站

IEPL优质线路|全天4K秒开