|NO.Z.00021|——————————|CloudNative|——|Kubernetes&RBAC介绍.V04|——|helm-chart|

一、helm：自己创建chart，完成应用部署

二、通过helm创建chart

### --- 使用命令创建chart
~~~		命令格式：helm create chart 名称

[root@k8s-master ~]# helm create mychart
Creating mychart

### --- 可以查看到生成的模板
~~~		charts： 空文件，不需要写入东西 
~~~		Chart.yaml：当前chart属性配置信息
~~~		templates：编写yaml文件放到这个目录中，里面很多的yaml文件，把自己写的yaml文件放在yaml中即可
~~~		values.yaml：yaml文件可以使用全局变量，全局变量的配置，可以放在values.yaml中，把自己定义的全局变量写入到该目录中

[root@k8s-master ~]# cd mychart/
[root@k8s-master mychart]# ls   

### --- 在templates文件夹创建两个yaml文件

[root@k8s-master ~]# cd mychart/templates/
[root@k8s-master templates]# kubectl create deployment web1 --image=nginx --dry-run -o yaml > deployment.yaml
W0223 20:46:15.517209   85463 helpers.go:535] --dry-run is deprecated and can be replaced with --dry-run=client.
[root@k8s-master templates]# kubectl expose deployment web1 --port=80 --target-port=80 --type=NodePort --dry-run -o yaml > service.yaml
W0223 20:49:55.929965   86337 helpers.go:535] --dry-run is deprecated and can be replaced with --dry-run=client.

[root@k8s-master templates]# kubectl create deployment web1 --image=nginx
deployment.apps/web1 created

[root@k8s-master templates]# kubectl get pods
web1-7f87dfbd56-5ffjz                           0/1     ContainerCreating   0 
[root@k8s-master templates]# kubectl delete deployment web1
deployment.apps "web1" deleted

~~~		查看删除状态，待会就查看不到了
[root@k8s-master templates]# kubectl get pods 

~~~		查看创建的两个yaml文件
[root@k8s-master templates]# ls
deployment.yaml  service.yaml

### --- 安装mychart：输出说明安装成功

[root@k8s-master ~]# helm install web1 mychart/             
NAME: web1
LAST DEPLOYED: Tue Feb 23 20:53:22 2021
NAMESPACE: default
STATUS: deployed
REVISION: 1
TEST SUITE: None

[root@k8s-master ~]# kubectl get pods
web1-7f87dfbd56-4fd9d                           1/1     Running     0          34s

[root@k8s-master ~]# kubectl get svc
web1             NodePort    10.105.189.14   <none>        80:31037/TCP   50s

### --- 应用升级更新

[root@k8s-master ~]# helm upgrade web1 mychart/
Release "web1" has been upgraded. Happy Helming!
NAME: web1
LAST DEPLOYED: Tue Feb 23 20:56:27 2021
NAMESPACE: default
STATUS: deployed
REVISION: 2
TEST SUITE: None  

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Walter Savage Landor:strove with none,for none was worth my strife.Nature I loved and, next to Nature, Art:I warm'd both hands before the fire of life.It sinks, and I am ready to depart

                                                                                                                                                   ——W.S.Landor

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