helm3

Posted 2021-03-03 cjwnb

部署helm客户端

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安装

wget https://get.helm.sh/helm-v3.0.0-linux-amd64.tar.gz
tar zxvf helm-v3.0.0-linux-amd64.tar.gz 
mv linux-amd64/helm /usr/bin/

配置仓库

• 微软仓库（http://mirror.azure.cn/kubernetes/charts/）这个仓库强烈推荐，基本上官网有的chart这里都有。
• 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，国内有点不好使。

helm repo add stable http://mirror.azure.cn/kubernetes/charts
helm repo add aliyun https://kubernetes.oss-cn-hangzhou.aliyuncs.com/charts 
helm repo update

• 查看配置的存储库

helm repo list
helm search repo stable

• 删除存储库

helm repo remove aliyun

案例1

 helm create nginx
 cd nginx/

• 目录结构

├── charts
├── Chart.yaml   # 可以被templates下面的文件引用
├── templates
│?? ├── deployment.yaml
│?? ├── _helpers.tpl
│?? ├── ingress.yaml
│?? ├── NOTES.txt
│?? ├── serviceaccount.yaml
│?? ├── service.yaml
│?? └── tests
│??     └── test-connection.yaml
└── values.yaml  # 定义变量, 可以被templates下面的文件引用

手动deploy

rm -rf /root/nginx/templates/*
kubectl create deployment web --image=nginx --dry-run -o yaml>/root/nginx/templates/deployment.yaml
kubectl apply -f /root/nginx/templates/deployment.yaml
kubectl expose deployment web --port=80 --target-port=80 --dry-run -o yaml > service.yaml

• deployment.yaml

apiVersion: apps/v1
kind: Deployment
metadata:
  creationTimestamp: null
  labels:
    app: web
  name: web
spec:
  replicas: 1
  selector:
    matchLabels:
      app: web
  strategy: {}
  template:
    metadata:
      creationTimestamp: null
      labels:
        app: web
    spec:
      containers:
      - image: nginx
        name: nginx
        resources: {}
status: {}

• service.yaml

apiVersion: v1
kind: Service
metadata:
  creationTimestamp: null
  labels:
    app: web
  name: web
spec:
  ports:
  - port: 80
    protocol: TCP
    targetPort: 80
  selector:
    app: web
status:
  loadBalancer: {}

• 查看pod

kubectl get pods

• 查看service

kubectl get svc

helm 安装

kubectl delete -f /root/nginx/templates/
kubectl delete -f /root/nginx/
helm install web /root/nginx/

• 查看部署状态

helm ls

• 查看dashboard

helm定义变量安装

• helm全局变量

Release.Name	release 名称
Release.Name	helm install时候 的 release 名字
Release.Namespace	release 命名空间
Release.Service	release 服务的名称
Release.Revision	release 修订版本号，从1开始累加

• deployment.yaml

apiVersion: apps/v1
kind: Deployment
metadata:
  labels:
    chart: {{ .Chart.Name }}
    app: {{ .Release.Name }}
  name: {{ .Release.Name }}
spec:
  replicas: {{ .Values.replicas }}
  selector:
    matchLabels:
      app: {{ .Values.label }}
  template:
    metadata:
      labels:
        app: {{ .Values.label }}
    spec:
      containers:
      - image: {{ .Values.image }}:{{ .Values.imageTag}}
        name: {{ .Release.Name }}
        resources: {}
status: {}

• service.yaml

apiVersion: v1
kind: Service
metadata:
  labels:
    chart: {{ .Chart.Name }}
    app: {{ .Release.Name }}
  name: {{ .Release.Name }}
spec:
  ports:
  - port: {{ .Values.port }}
    protocol: TCP
    targetPort: {{ .Values.targetPort }}
  selector:
    app: {{ .Values.label }}

• values.yaml

replicas: 3
image: nginx
imageTag: 1.17
label: nginx_label
port: 80
targetPort: 80

• Chart.yaml

apiVersion: v2
name: nginx
description: A Helm chart for Kubernetes
type: application
version: 0.1.0
appVersion: 1.16.0

• 安装

 helm install lyysb  /root/nginx/

• 更新

helm upgrade lyysb  /root/nginx/

• 删除

helm delete lyysb