> 文档中心 > 关于Kubernetes中使用Helm部署应用及私有Helm源搭建的一些笔记

关于Kubernetes中使用Helm部署应用及私有Helm源搭建的一些笔记


写在前面


  • 学习K8s涉及,整理笔记记忆
  • 博文偏实战,内容涉及:
    • Helm的基本概念及安装,Helm源配置
    • chart包的安装部署
    • 私有Helm源的搭建及chart包的pushpull

“不爱也不恨”包含了全部世俗智慧的一半;“不要说话也不要相信”则包含了另一半的人生智慧。——叔本华《人生的智慧》


Helm

Helm是一个由CNCF孵化和管理的项目,用于对需要在Kubernetes上部署的复杂应用进行定义、安装和更新。Helm以Chart的方式对应用软件进行描述,可以方便地创建、版本化、共享和发布复杂的应用软件。

helm的作用就是把许多的资源定义 比如svcdeployment,一次性通过全部定义好,放在源里统一管理,这样很容易在其他机器上部署,个人理解这个类似于自动化运维ansible中的角色概念,前端项目中的npm包管理工具,后端项目中的maven等构建工具一样,类比Ansible使用角色来整合playbook.yaml达到复用性。同样的,使用helm用于整合k8s中的资源对象yaml文件,实现复用性,同时讲资源文件的参数,和参数值通过temple和value进行了分离
关于Kubernetes中使用Helm部署应用及私有Helm源搭建的一些笔记

Helm主要概念

Chart:一个Helm包,其中包含运行一个应用所需要的工具和资源定义,还可能包含Kubernetes集群中的服务定义,类似Ansible中的rhel-system-roles软件包

Release: 在Kubernetes集群上运行的一个Chart实例。在同一个集群上,一个Chart可以被安装多次。

Repository:用于存放和共享Chart仓库简单来说, Helm整个系统的主要任务就是,在仓库中查找需要的Chart,然后将Chart以Release的形式安装到Kubernetes集群中。

使用helm我们首先需要安装,可以通过Github下载安装包

Helm 安装

安装包下载:https://github.com/helm/helm/releases:

解压安装

┌──[root@vms81.liruilongs.github.io]-[~]└─$tar zxf helm-v3.2.1-linux-amd64.tar.gz┌──[root@vms81.liruilongs.github.io]-[~]└─$cd linux-amd64/┌──[root@vms81.liruilongs.github.io]-[~/linux-amd64]└─$lshelm  LICENSE  README.md

之后直接将helm复制到/usr/local/bin/,配置完之后,即可以使用helm命令

┌──[root@vms81.liruilongs.github.io]-[~/linux-amd64]└─$cp helm  /usr/local/bin/┌──[root@vms81.liruilongs.github.io]-[~/linux-amd64]└─$ls /usr/local/bin/helm

配置命令自动补全,通过写入/etc/profile 文件 souece < (helm completion bash)的方式配置命令自动补全。配置完记得使用source /etc/profile去刷新配置

┌──[root@vms81.liruilongs.github.io]-[~/ansible/k8s-helm-create]└─$helm --help | grep bash  completion  generate autocompletions script for the specified shell (bash or zsh)┌──[root@vms81.liruilongs.github.io]-[~/ansible/k8s-helm-create]└─$vim /etc/profile┌──[root@vms81.liruilongs.github.io]-[~/ansible/k8s-helm-create]└─$source /etc/profile┌──[root@vms81.liruilongs.github.io]-[~/ansible/k8s-helm-create]└─$cat /etc/profile | grep -v ^# | grep   sourcesource <(kubectl completion bash)source <(helm completion bash)┌──[root@vms81.liruilongs.github.io]-[~/ansible/k8s-helm-create]└─$

验证安装,查看Helm版本

┌──[root@vms81.liruilongs.github.io]-[~/ansible/k8s-helm-create]└─$helm versionversion.BuildInfo{Version:"v3.2.1", GitCommit:"fe51cd1e31e6a202cba7dead9552a6d418ded79a", GitTreeState:"clean", GoVersion:"go1.13.10"}┌──[root@vms81.liruilongs.github.io]-[~/ansible/k8s-helm-create]└─$

配置helm源

使用helm需要配置yaml源,常见的有阿里。微软,和Githup上的源

  • 阿里云的源 https://apphub.aliyuncs.com
  • 微软azure的源 http://mirror.azure.cn/kubernetes/charts/

查看所以的源

┌──[root@vms81.liruilongs.github.io]-[~/ansible/k8s-helm-create]└─$helm repo list  #查看所以的源Error: no repositories to show

添加指定是源

┌──[root@vms81.liruilongs.github.io]-[~/ansible/k8s-helm-create]└─$helm repo add azure http://mirror.azure.cn/kubernetes/charts/"azure" has been added to your repositories┌──[root@vms81.liruilongs.github.io]-[~/ansible/k8s-helm-create]└─$helm repo add ali https://apphub.aliyuncs.com"ali" has been added to your repositories

查看刚才添加的yum源

┌──[root@vms81.liruilongs.github.io]-[~/ansible/k8s-helm-create]└─$helm repo listNAME    URLazure   http://mirror.azure.cn/kubernetes/charts/ali     https://apphub.aliyuncs.com┌──[root@vms81.liruilongs.github.io]-[~/ansible/k8s-helm-create]└─$

Helm的常见用法

Helm的常见用法,包括搜索Chart、安装Chart、自定义Chart配置、更新或回滚Release、删除Release、创建自定义Chart、搭建私有仓库等

helm search:搜索可用的Chart

┌──[root@vms81.liruilongs.github.io]-[~/ansible/k8s-helm-create]└─$helm search  repo mysqlNAMECHART VERSION   APP VERSION     DESCRIPTIONali/mysql  6.8.0    8.0.19   Chart to create a Highly available MySQL clusterali/mysqldump     2.6.0    2.4.1    A Helm chart to help backup MySQL databases usi...ali/mysqlha1.0.0    5.7.13   MySQL cluster with a single master and zero or ...ali/prometheus-mysql-exporter   0.5.2    v0.11.0  A Helm chart for prometheus mysql exporter with...azure/mysql1.6.9    5.7.30   DEPRECATED - Fast, reliable, scalable, and easy...azure/mysqldump   2.6.2    2.4.1    DEPRECATED! - A Helm chart to help backup MySQL...azure/prometheus-mysql-exporter 0.7.1    v0.11.0  DEPRECATED A Helm chart for prometheus mysql 。。。。。。。。。。

chart包拉取

安装chart可以直接使用命令安装,也可以拉取到本地之后安装,也可以直接通过命名行安装

  • 本地的Chart压缩包(helm install mysql-1.6.4.tgz)
  • 一个Chart目录(helm install mysql/)
  • 一个完整的URL(helm install https://example.com/charts/mysql-1.6.4.tgz)

chart包拉取

┌──[root@vms81.liruilongs.github.io]-[~/ansible/k8s-helm-create]└─$helm pull azure/mysql --version=1.6.4┌──[root@vms81.liruilongs.github.io]-[~/ansible/k8s-helm-create]└─$lsmysql-1.6.4.tgz

helm install:安装Chart

chart包直接安装

┌──[root@vms81.liruilongs.github.io]-[~/ansible/k8s-helm-create]└─$#helm install db azure/mysql --version=1.6.4┌──[root@vms81.liruilongs.github.io]-[~/ansible/k8s-helm-create]└─$

拉取的chart包详细信息,通过解压之后查看

┌──[root@vms81.liruilongs.github.io]-[~/ansible/k8s-helm-create]└─$lsmysql-1.6.4.tgz┌──[root@vms81.liruilongs.github.io]-[~/ansible/k8s-helm-create]└─$tar zxf mysql-1.6.4.tgz.......┌──[root@vms81.liruilongs.github.io]-[~/ansible/k8s-helm-create]└─$lsmysql  mysql-1.6.4.tgz┌──[root@vms81.liruilongs.github.io]-[~/ansible/k8s-helm-create]└─$cd mysql/┌──[root@vms81.liruilongs.github.io]-[~/ansible/k8s-helm-create/mysql]└─$lsChart.yaml  README.md  templates  values.yaml
yaml文件 描述
Chart.yaml 用于描述Chart信息的YAML文件,版本定义等
README.md 可选: README文件
values.yaml 默认的配置值,即把可变的值抽离出来。
templates 可选:即模板,结合values.yaml,能够生成Kubernetes的manifest文件

对于下载好的yaml文件,我们可以修改后使用helm package重新打包

┌──[root@vms81.liruilongs.github.io]-[~/ansible/k8s-helm-create]└─$rm -rf mysql-1.6.4.tgz ; helm package  mysql/Successfully packaged chart and saved it to: /root/ansible/k8s-helm-create/mysql-1.6.4.tgz┌──[root@vms81.liruilongs.github.io]-[~/ansible/k8s-helm-create]└─$lsmysql  mysql-1.6.4.tgz

下面我们修改chart中的对应镜像为已经下载好的mysql和busybox镜像

┌──[root@vms81.liruilongs.github.io]-[~/ansible]└─$ansible 192.168.26.82 -m shell -a "docker images | grep mysql"192.168.26.82 | CHANGED | rc=0 >>mysql    latest    ecac195d15af   2 months ago    516MBmysql    <none>    9da615fced53   3 months ago    514MBhub.c.163.com/library/mysql   latest    9e64176cd8a2   4 years ago     407MB┌──[root@vms81.liruilongs.github.io]-[~/ansible]└─$ansible 192.168.26.82 -m shell -a "docker images | grep busybox"192.168.26.82 | CHANGED | rc=0 >>busybox  latest    ffe9d497c324   5 weeks ago     1.24MBbusybox  <none>    7138284460ff   2 months ago    1.24MBbusybox  <none>    cabb9f684f8b   2 months ago    1.24MBbusybox  1.27      6ad733544a63   4 years ago     1.13MByauritux/busybox-curl  latest    69894251bd3c   5 years ago     21.3MB
┌──[root@vms81.liruilongs.github.io]-[~/ansible]└─$fgvim ./k8s-helm-create/mysql/values.yaml┌──[root@vms81.liruilongs.github.io]-[~/ansible]└─$

通过修好的yaml文件创建chart使用helm ls查看当前运行的chart

┌──[root@vms81.liruilongs.github.io]-[~/ansible/k8s-helm-create]└─$helm lsNAME    NAMESPACEREVISION UPDATED STATUS  CHART   APP VERSION

使用helm install运行Chart
这里我们使用之前的那个mysq chart来安装一个mysql

┌──[root@vms81.liruilongs.github.io]-[~/ansible/k8s-helm-create]└─$cd mysql/┌──[root@vms81.liruilongs.github.io]-[~/ansible/k8s-helm-create/mysql]└─$helm install mydb .NAME: mydbLAST DEPLOYED: Thu Jan 13 01:51:42 2022NAMESPACE: liruilong-network-createSTATUS: deployedREVISION: 1NOTES:MySQL can be accessed via port 3306 on the following DNS name from within your cluster:mydb-mysql.liruilong-network-create.svc.cluster.localTo get your root password run:    MYSQL_ROOT_PASSWORD=$(kubectl get secret --namespace liruilong-network-create mydb-mysql -o jsonpath="{.data.mysql-root-password}" | base64 --decode; echo)To connect to your database:1. Run an Ubuntu pod that you can use as a client:    kubectl run -i --tty ubuntu --image=ubuntu:16.04 --restart=Never -- bash -il2. Install the mysql client:    $ apt-get update && apt-get install mysql-client -y3. Connect using the mysql cli, then provide your password:    $ mysql -h mydb-mysql -pTo connect to your database directly from outside the K8s cluster:    MYSQL_HOST=127.0.0.1    MYSQL_PORT=3306    # Execute the following command to route the connection:    kubectl port-forward svc/mydb-mysql 3306    mysql -h ${MYSQL_HOST} -P${MYSQL_PORT} -u root -p${MYSQL_ROOT_PASSWORD}

查看是否是否运行成功mydb的pod和SVC

┌──[root@vms81.liruilongs.github.io]-[~/ansible/k8s-helm-create/mysql]└─$kubectl  get podsNAME     READY   STATUS    RESTARTS AGEmydb-mysql-7f8c5c47bd-82cts   1/1     Running   0 55spod1     1/1     Running   2 (7d17h ago)   9dpod2     1/1     Running   3 (3d3h ago)    9d
┌──[root@vms81.liruilongs.github.io]-[~/ansible/k8s-helm-create/mysql]└─$kubectl  get svcNAME  TYPE    CLUSTER-IPEXTERNAL-IP      PORT(S) AGEmydb-mysql   ClusterIP      10.107.17.103    <none>    3306/TCP62ssvc1  LoadBalancer   10.106.61.84     192.168.26.240   80:30735/TCP   9dsvc2  LoadBalancer   10.111.123.194   192.168.26.241   80:31034/TCP   9d┌──[root@vms81.liruilongs.github.io]-[~/ansible/k8s-helm-create/mysql]└─$

安装一个mysql客户端测试OK

┌──[root@vms82.liruilongs.github.io]-[~]└─$yum install  mariadb -y
┌──[root@vms81.liruilongs.github.io]-[~/ansible/k8s-helm-create/mysql]└─$mysql -h10.107.17.103 -uroot -ptestingWelcome to the MariaDB monitor.  Commands end with ; or \g.Your MySQL connection id is 7Server version: 5.7.18 MySQL Community Server (GPL)Copyright (c) 2000, 2018, Oracle, MariaDB Corporation Ab and others.Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.MySQL [(none)]> use mysqlReading table information for completion of table and column namesYou can turn off this feature to get a quicker startup with -ADatabase changed

删除Release

┌──[root@vms81.liruilongs.github.io]-[~/ansible/k8s-helm-create/mysql]└─$helm del mydbrelease "mydb" uninstalled┌──[root@vms81.liruilongs.github.io]-[~/ansible/k8s-helm-create/mysql]└─$helm lsNAME    NAMESPACEREVISION UPDATED STATUS  CHART   APP VERSION┌──[root@vms81.liruilongs.github.io]-[~/ansible/k8s-helm-create/mysql]└─$

搭建私有Repository

自建的Chart之后自然需要搭建私有仓库。下面使用Nginx搭建一个简单的Chart私有仓库

仓库搭建

仓库搭建,找一台机器运行一个Nginx服务做仓库,需要注意要对主页数据做映射

┌──[root@vms83.liruilongs.github.io]-[~]└─$netstat  -ntulp | grep 80┌──[root@vms83.liruilongs.github.io]-[~]└─$docker run -dit --name=helmrepo -p 8080:80 -v /data:/usr/share/nginx/html/charts docker.io/nginx7201e001b02602f087105ca6096b0816acb03db02296c35c098a3dfddcb9c8d0┌──[root@vms83.liruilongs.github.io]-[~]└─$docker ps | grep helmrepo7201e001b026   nginx     "/docker-entrypoint.…"   16 seconds ago      Up 15 seconds      0.0.0.0:8080->80/tcp, :::8080->80/tcp   helmrepo

访问测试

┌──[root@vms83.liruilongs.github.io]-[~]└─$curl 127.0.0.1:8080<!DOCTYPE html><html><head><title>Welcome to nginx!</title>。。。。。。。。

chart包上传

打包之前的mysql包,上传helm私有仓库。这里需要本读生成索引文件index.yaml

┌──[root@vms81.liruilongs.github.io]-[~/ansible/k8s-helm-create]└─$helm  package mysql/Successfully packaged chart and saved it to: /root/ansible/k8s-helm-create/mysql-1.6.4.tgz┌──[root@vms81.liruilongs.github.io]-[~/ansible/k8s-helm-create]└─$helm repo index . --url http://192.168.26.83:8080/charts┌──[root@vms81.liruilongs.github.io]-[~/ansible/k8s-helm-create]└─$lsindex.yaml  mysql  mysql-1.6.4.tgz┌──[root@vms81.liruilongs.github.io]-[~/ansible/k8s-helm-create]└─$cd ..

将索引文件和chart包一同上传到私有仓库

┌──[root@vms81.liruilongs.github.io]-[~/ansible]└─$ansible 192.168.26.83 -m copy -a "src=./k8s-helm-create/index.yaml dest=/data/"192.168.26.83 | CHANGED => {    "ansible_facts": { "discovered_interpreter_python": "/usr/bin/python"    },    "changed": true,    "checksum": "233a0f3837d46af8a50098f1b29aa524b751cb29",    "dest": "/data/index.yaml",    "gid": 0,    "group": "root",    "md5sum": "66953d9558e44ab2f049dc602600ffda",    "mode": "0644",    "owner": "root",    "size": 843,    "src": "/root/.ansible/tmp/ansible-tmp-1642011407.72-76313-71345316897038/source",    "state": "file",    "uid": 0}┌──[root@vms81.liruilongs.github.io]-[~/ansible]└─$ansible 192.168.26.83 -m copy -a "src=./k8s-helm-create/mysql-1.6.4.tgz dest=/data/"192.168.26.83 | CHANGED => {    "ansible_facts": { "discovered_interpreter_python": "/usr/bin/python"    },    "changed": true,    "checksum": "4fddb1c13c71673577570e61f68f926af7255bad",    "dest": "/data/mysql-1.6.4.tgz",    "gid": 0,    "group": "root",    "md5sum": "929267de36f9be04e0adfb2f9c9f5812",    "mode": "0644",    "owner": "root",    "size": 11121,    "src": "/root/.ansible/tmp/ansible-tmp-1642011437.58-76780-127185287864942/source",    "state": "file",    "uid": 0}┌──[root@vms81.liruilongs.github.io]-[~/ansible]└─$

仓库索引文件更新

如果添加新的chart包到私有仓库,需要对于索引文件进行更新

helm create 创建一个自定义的chart包

┌──[root@vms81.liruilongs.github.io]-[~/ansible/k8s-helm-create]└─$helm create  liruilonghelmCreating liruilonghelm┌──[root@vms81.liruilongs.github.io]-[~/ansible/k8s-helm-create]└─$lsindex.yaml  liruilonghelm  mysql  mysql-1.6.4.tgz┌──[root@vms81.liruilongs.github.io]-[~/ansible/k8s-helm-create]└─$helm package liruilonghelm/Successfully packaged chart and saved it to: /root/ansible/k8s-helm-create/liruilonghelm-0.1.0.tgz┌──[root@vms81.liruilongs.github.io]-[~/ansible/k8s-helm-create]└─$lsindex.yaml  liruilonghelm  liruilonghelm-0.1.0.tgz  mysql  mysql-1.6.4.tgz

使用同样的命令跟新索引文件

┌──[root@vms81.liruilongs.github.io]-[~/ansible/k8s-helm-create]└─$helm repo index . --url http://192.168.26.83:8080/charts┌──[root@vms81.liruilongs.github.io]-[~/ansible/k8s-helm-create]└─$cat index.yaml

查看新的索引文件

apiVersion: v1entries:  liruilonghelm:  - apiVersion: v2    appVersion: 1.16.0    created: "2022-01-13T02:22:19.442365047+08:00"    description: A Helm chart for Kubernetes    digest: abb491f061cccc8879659149d96c99cbc261af59d5fcf8855c5e86251fbd53c1    name: liruilonghelm    type: application    urls:    - http://192.168.26.83:8080/charts/liruilonghelm-0.1.0.tgz    version: 0.1.0  mysql:  - apiVersion: v1    appVersion: 5.7.30    created: "2022-01-13T02:22:19.444985984+08:00"    description: Fast, reliable, scalable, and easy to use open-source relational      database system.    digest: 29153332e509765010c7e5e240a059550d52b01b31b69f25dd27c136dffec40f    home: https://www.mysql.com/    icon: https://www.mysql.com/common/logos/logo-mysql-170x115.png    keywords:    - mysql    - database    - sql    maintainers:    - email: o.with@sportradar.com      name: olemarkus    - email: viglesias@google.com      name: viglesiasce    name: mysql    sources:    - https://github.com/kubernetes/charts    - https://github.com/docker-library/mysql    urls:    - http://192.168.26.83:8080/charts/mysql-1.6.4.tgz    version: 1.6.4generated: "2022-01-13T02:22:19.440764685+08:00"

会发现索引文件已经被更新,entries里有两个对象,上传相关的数据

┌──[root@vms81.liruilongs.github.io]-[~/ansible]└─$ansible 192.168.26.83 -m copy -a "src=./k8s-helm-create/index.yaml dest=/data/"192.168.26.83 | CHANGED => {    "ansible_facts": { "discovered_interpreter_python": "/usr/bin/python"    },    "changed": true,    "checksum": "dbdc550a24159764022ede9428b9f11a09ccf291",    "dest": "/data/index.yaml",    "gid": 0,    "group": "root",    "md5sum": "b771d8e50dd49228594f8a566117f8bf",    "mode": "0644",    "owner": "root",    "size": 1213,    "src": "/root/.ansible/tmp/ansible-tmp-1642012325.1-89511-190591844764611/source",    "state": "file",    "uid": 0}┌──[root@vms81.liruilongs.github.io]-[~/ansible]└─$ansible 192.168.26.83 -m copy -a "src=./k8s-helm-create/liruilonghelm-0.1.0.tgz dest=/data/"192.168.26.83 | CHANGED => {    "ansible_facts": { "discovered_interpreter_python": "/usr/bin/python"    },    "changed": true,    "checksum": "f7fe8a0a7585adf23e3e23f8378e3e5a0dc13f92",    "dest": "/data/liruilonghelm-0.1.0.tgz",    "gid": 0,    "group": "root",    "md5sum": "04670f9b7e614d3bc6ba3e133bddae59",    "mode": "0644",    "owner": "root",    "size": 3591,    "src": "/root/.ansible/tmp/ansible-tmp-1642012352.54-89959-104738456182106/source",    "state": "file",    "uid": 0}

用私有仓库chart部署应用程序

添加私有源

┌──[root@vms81.liruilongs.github.io]-[~/ansible]└─$helm repo add liruilong_repo http://192.168.26.83:8080/charts"liruilong_repo" has been added to your repositories┌──[root@vms81.liruilongs.github.io]-[~/ansible]└─$helm repo listNAME     URLazure    http://mirror.azure.cn/kubernetes/charts/ali      https://apphub.aliyuncs.comliruilong_repo  http://192.168.26.83:8080/charts

私有源查找安装的chart

┌──[root@vms81.liruilongs.github.io]-[~/ansible]└─$helm search repo mysql | grep liruilongliruilong_repo/mysql     1.6.4    5.7.30   Fast, reliable, scalable, and easy to use open-...┌──[root@vms81.liruilongs.github.io]-[~/ansible]└─$

安装私有源chart

┌──[root@vms81.liruilongs.github.io]-[~/ansible]└─$helm listNAME    NAMESPACEREVISION UPDATED STATUS  CHART   APP VERSION┌──[root@vms81.liruilongs.github.io]-[~/ansible/k8s-helm-create]└─$helm install liruilongdb  liruilong_repo/mysqlNAME: liruilongdbLAST DEPLOYED: Thu Jan 13 02:42:41 2022NAMESPACE: liruilong-network-createSTATUS: deployedREVISION: 1NOTES:MySQL can be accessed via port 3306 on the following DNS name from within your cluster:liruilongdb-mysql.liruilong-network-create.svc.cluster.localTo get your root password run:    MYSQL_ROOT_PASSWORD=$(kubectl get secret --namespace liruilong-network-create liruilongdb-mysql -o jsonpath="{.data.mysql-root-password}" | base64 --decode; echo)To connect to your database:1. Run an Ubuntu pod that you can use as a client:    kubectl run -i --tty ubuntu --image=ubuntu:16.04 --restart=Never -- bash -il2. Install the mysql client:    $ apt-get update && apt-get install mysql-client -y3. Connect using the mysql cli, then provide your password:    $ mysql -h liruilongdb-mysql -pTo connect to your database directly from outside the K8s cluster:    MYSQL_HOST=127.0.0.1    MYSQL_PORT=3306    # Execute the following command to route the connection:    kubectl port-forward svc/liruilongdb-mysql 3306    mysql -h ${MYSQL_HOST} -P${MYSQL_PORT} -u root -p${MYSQL_ROOT_PASSWORD}

验证安装,查看chart列表

┌──[root@vms81.liruilongs.github.io]-[~/ansible/k8s-helm-create]└─$helm listNAME     NAMESPACE  REVISION UPDATED     STATUS  CHART     APP VERSIONliruilongdb     liruilong-network-create 1 2022-01-13 02:42:41.537928447 +0800 CST deployedmysql-1.6.4      5.7.30┌──[root@vms81.liruilongs.github.io]-[~/ansible/k8s-helm-create]└─$

helm install命令的执行过程中,可以使用helm status命令跟踪 Release的状态:Helm不会等待所有创建过程的完成,这是因为有些Chart的Docker镜像较大,会消耗很长的时间进行下载和创建

┌──[root@vms81.liruilongs.github.io]-[~/ansible/k8s-helm-create]└─$helm status  liruilongdbNAME: liruilongdbLAST DEPLOYED: Thu Jan 13 02:42:41 2022NAMESPACE: liruilong-network-createSTATUS: deployedREVISION: 1NOTES:MySQL can be accessed via port 3306 on the following DNS name from within your cluster:liruilongdb-mysql.liruilong-network-create.svc.cluster.localTo get your root password run:    MYSQL_ROOT_PASSWORD=$(kubectl get secret --namespace liruilong-network-create liruilongdb-mysql -o jsonpath="{.data.mysql-root-password}" | base64 --decode; echo)To connect to your database:1. Run an Ubuntu pod that you can use as a client:    kubectl run -i --tty ubuntu --image=ubuntu:16.04 --restart=Never -- bash -il2. Install the mysql client:    $ apt-get update && apt-get install mysql-client -y3. Connect using the mysql cli, then provide your password:    $ mysql -h liruilongdb-mysql -pTo connect to your database directly from outside the K8s cluster:    MYSQL_HOST=127.0.0.1    MYSQL_PORT=3306    # Execute the following command to route the connection:    kubectl port-forward svc/liruilongdb-mysql 3306    mysql -h ${MYSQL_HOST} -P${MYSQL_PORT} -u root -p${MYSQL_ROOT_PASSWORD}

在成功安装Chart后,系统会在当前命名空间内创建一个ConfigMap用于保存Release对象的数据

┌──[root@vms81.liruilongs.github.io]-[~/ansible/k8s-helm-create]└─$kubectl  get configmapsNAMEDATA   AGEkube-root-ca.crt  1      12dliruilongdb-mysql-test   1      2d19h
┌──[root@vms81.liruilongs.github.io]-[~/ansible/k8s-helm-create]└─$kubectl  describe configmaps liruilongdb-mysql-testName:  liruilongdb-mysql-testNamespace:    liruilong-network-createLabels:app=liruilongdb-mysqlapp.kubernetes.io/managed-by=Helmchart=mysql-1.6.4heritage=Helmrelease=liruilongdbAnnotations:  meta.helm.sh/release-name: liruilongdbmeta.helm.sh/release-namespace: liruilong-network-createData====run.sh:----@test "Testing MySQL Connection" {  mysql --host=liruilongdb-mysql --port=3306 -u root -ptesting}BinaryData====Events:  <none>┌──[root@vms81.liruilongs.github.io]-[~/ansible/k8s-helm-create]└─$

可以通过 helm delete命令删除运行的Release

┌──[root@vms81.liruilongs.github.io]-[~/ansible/k8s-helm-create]└─$kubectl  get podsNAME     READY   STATUS    RESTARTS      AGEliruilongdb-mysql-5cbf489f65-6ff4q   1/1     Running   1 (56m ago)   26h┌──[root@vms81.liruilongs.github.io]-[~/ansible/k8s-helm-create]└─$helm delete liruilongdbrelease "liruilongdb" uninstalled┌──[root@vms81.liruilongs.github.io]-[~/ansible/k8s-helm-create]└─$kubectl  get podsNAME     READY   STATUS RESTARTS      AGEliruilongdb-mysql-5cbf489f65-6ff4q   1/1     Terminating   1 (57m ago)   26h┌──[root@vms81.liruilongs.github.io]-[~/ansible/k8s-helm-create]└─$

关于Helm和小伙伴就分享到这里,其实还有很大,比如chart更新回滚,模板导出等。有遇到的做补充。生活加油
关于Kubernetes中使用Helm部署应用及私有Helm源搭建的一些笔记

关于Kubernetes中使用Helm部署应用及私有Helm源搭建的一些笔记 《新程序员》:云原生和全面数字化实践 关于Kubernetes中使用Helm部署应用及私有Helm源搭建的一些笔记 50位技术专家共同创作,文字、视频、音频交互阅读冰雪之城