5. 自定义Charts

# 一、创建Chart

1. 执行命令helm create myapp，会创建一个myapp目录
```bash
[root@k8s-master k8s-test]# helm create myapp
Creating myapp
```

2. 查看myapp目录结构
```bash
[root@k8s-master k8s-test]# tree myapp
myapp
├── charts
├── Chart.yaml
├── templates
│   ├── deployment.yaml
│   ├── _helpers.tpl
│   ├── hpa.yaml
│   ├── ingress.yaml
│   ├── NOTES.txt
│   ├── serviceaccount.yaml
│   ├── service.yaml
│   └── tests
│       └── test-connection.yaml
└── values.yaml
```

# 二、修改配置文件

1. 编辑自描述文件 Chart.yaml , 修改version和appVersion信息
```bash
apiVersion: v2
name: myapp
description: A Helm chart for Kubernetes

# A chart can be either an 'application' or a 'library' chart.
#
# Application charts are a collection of templates that can be packaged into versioned archives
# to be deployed.
#
# Library charts provide useful utilities or functions for the chart developer. They're included as
# a dependency of application charts to inject those utilities and functions into the rendering
# pipeline. Library charts do not define any templates and therefore cannot be deployed.
type: application

# This is the chart version. This version number should be incremented each time you make changes
# to the chart and its templates, including the app version.
# Versions are expected to follow Semantic Versioning (https://semver.org/)
version: 1.0.0 # 项目版本号

# This is the version number of the application being deployed. This version number should be
# incremented each time you make changes to the application. Versions are not expected to
# follow Semantic Versioning. They should reflect the version the application is using.
# It is recommended to use it with quotes.
appVersion: "v1" # 镜像版本
```

2. 编辑values.yaml配置文件

![未命名图片.png](/media/202406/15.5.15287438_image1.png)

# 三、打包安装chart

1. 检查chart语法正确性 `# helm lint myapp` 
2. 打包自定义的chart `# helm package myapp` 
3. 安装chart `# helm install myapp myapp-1.tgz` 
4. 验证

![未命名图片.png](/media/202406/15.5.15287438_image2.png)

# 四、更新

1. 编辑自描述文件 Chart.yaml , 修改version和appVersion信息

![未命名图片.png](/media/202406/15.5.15287438_image3.png)

2. 重新打包charts
- 检查chart语法正确性 `# helm lint myapp` 
- 打包自定义的chart `# helm package myapp` 
3. 更新chart `# helm upgrade myapp myapp-2.tgz` 
4. 验证

![未命名图片.png](/media/202406/15.5.15287438_image4.png)

# 五、回滚

1. 查看当前版本信息

![未命名图片.png](/media/202406/15.5.15287438_image5.png)

2. 查看历史版本信息

![未命名图片.png](/media/202406/15.5.15287438_image6.png)

3. 回滚到指定版本

![未命名图片.png](/media/202406/15.5.15287438_image7.png)

4. 验证

![未命名图片.png](/media/202406/15.5.15287438_image8.png)