• helm3

    Helm客户端

    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

    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 mychart
cd mychart/
rm -rf /root/mychart/templates/*

    • Chart.yaml (helm create mychart 自动生成的文件)
    apiVersion: v2
name: nginx
description: A Helm chart for Kubernetes
type: application
version: 0.1.0
appVersion: 1.16.0

    1. 生成模板deployment文件

    kubectl create deployment mychart --image=nginx:1.16 -o yml -o yaml --dry-run > deployment.yaml

    2. 修改deployment文件

    • deployment.yaml
    apiVersion: apps/v1
kind: Deployment
metadata:
  name: {{ .Values.name }} 
spec:
  replicas: {{ .Values.replicas }} 
  selector:
    matchLabels:
      app: mychart
  template:
    metadata:
      labels:
        app: mychart
    spec:
      containers:
      - image: {{ .Values.image }}:{{ .Values.imageTag }}
        name: nginx
        resources: {}

    • values.yaml
    replicas: 3
name: hello
image: nginx
imageTag: 1.17

    3. 安装

    helm install hello /root/mychart/

    4. 验证

    kubectl get pods -owide



    curl -I 192.168.236.233


    5. 修改nginx版本并升级

    • values.yaml
    replicas: 3
name: hello
image: nginx
imageTag: 1.12


    helm upgrade hello /root/mychart/


    helm history hello


    6. 回滚到上一个版本

    helm rollback hello 1


    kubectl get pods -owide



    curl -I 192.168.236.240


    7. 将nginx版本下降到1.8

    helm upgrade --set imageTag=1.8 hello /root/mychart/


    helm history hello



    案例2

     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 --set replicas=1   /root/nginx/

    --set 定义的变量的值的优先级最高


    • 删除
    helm delete lyysb

    helm语法

    条件判断(if)


    条件判断中被对比的对象不支持数字, 单引号'', 必须使用双引号""

    案例1

    • deployment
    apiVersion: apps/v1
kind: Deployment
metadata:
  labels:
    chart: {{ .Chart.Name }}
    app: {{ .Release.Name }} 
  name: {{ .Release.Name }}
spec:
  replicas: {{ .Values.replicas }}
  selector:
    matchLabels:
      app: {{ quote .Values.label }}
  template:
    metadata:
      labels:
        app: {{ .Values.label }} 
        {{- if eq .Values.test "lyysb" }}
        develop: lyysb
        {{- else }}
        develop: lyysupersb
        {{- end }}
    spec:
      containers:
      - image: {{ .Values.image }}:{{ .Values.imageTag}}
        name: {{ .Release.Name }}
        resources: {}
status: {}

    • values.yaml
    replicas: 3
image: nginx
imageTag: 1.17
label: nginx_label
port: 80
targetPort: 80
test: 'lyysb'

    案例2

    • values.yaml
    replicaCount: 3 
image:
  repository: nginx
  tag: 1.17
  pullPolicy: IfNotPresent
imagePullSecrets: []
nameOverride: ""
fullnameOverride: ""
serviceAccount:
  create: true
  name:
podSecurityContext: {}
securityContext: {}
service:
  type: ClusterIP
  port: 80
ingress:
  enabled: true 
  annotations: {}
  hosts:
    - host: chart-example.local
      paths: []
  tls: []
resources: {}
nodeSelector: {}
tolerations: []
affinity: {}

    • deployment.yaml
    apiVersion: apps/v1
kind: Deployment
metadata:
  labels:
    chart: {{ .Chart.Name }}
    app: {{ .Release.Name }} 
  name: {{ .Release.Name }}
spec:
  replicas: {{ .Values.replicaCount }}
  selector:
    matchLabels:
      app:  {{ .Release.Name }}
      chart:  {{ .Chart.Name }}
  template:
    metadata:
      labels:
        app:  {{ .Release.Name }}
        chart:  {{ .Chart.Name }}
    spec:
      containers:
      - image: {{ .Values.image.repository }}:{{ .Values.image.tag }}
        name: {{ .Release.Name }}
        resources: {}
status: {}


    {{- if .Values.ingress.enabled }}
apiVersion: networking.k8s.io/v1beta1
kind: Ingress
metadata:
  name: test-ingress
  annotations:
    nginx.ingress.kubernetes.io/rewrite-target: /
spec:
  rules:
  - http:
      paths:
      - path: /testpath
        backend:
          serviceName: test
          servicePort: 80
{{- end }}

    条件判断(with)

    • values.yaml
    nodeSelector: 
  team: a
  gpu: ok

    • deployment.yaml

      {{- toYaml . | nindent 8 }} 可以写成 如下形式

      {{ .team}}

      {{ .gpu }}

    apiVersion: apps/v1
kind: Deployment
metadata:
  labels:
    chart: {{ .Chart.Name }}
    app: {{ .Release.Name }} 
  name: {{ .Release.Name }}
spec:
  replicas: {{ .Values.replicaCount }}
  selector:
    matchLabels:
      app:  {{ .Release.Name }}
      chart:  {{ .Chart.Name }}
  template:
    metadata:
      labels:
        app:  {{ .Release.Name }}
        chart:  {{ .Chart.Name }}
    spec:
      {{-  with .Values.nodeSelector }}
      nodeSelector:
      {{- toYaml . | nindent 8 }}
      {{- end }}
      containers:
      - image: {{ .Values.image.repository }}:{{ .Values.image.tag }}
        name: {{ .Release.Name }}
        resources: {}
status: {}

    • 验证下
    helm install web2 /root/helm/nginx/ --dry-run


    循环(range)

    • values.yaml
    test: 
  - 'lzzsb'
  - 'lyysb'
  - 'lxxsb'

    • configmap.yaml
    apiVersion: v1
kind: ConfigMap
metadata:
  name: {{ .Release.Name }}
data: 
  test: 
    {{- range .Values.test }}
    {{ . }}
    {{- end }}

    • 验证
    helm install web2 /root/helm/nginx/ --dry-run


    变量

    with 无法引用全局变量的解决办法

    • values.yaml
    nodeSelector: 
  team: a
  gpu: ok

    • deployment.yaml
    apiVersion: apps/v1
kind: Deployment
metadata:
  labels:
    chart: {{ .Chart.Name }}
    app: {{ .Release.Name }} 
  name: {{ .Release.Name }}
spec:
  replicas: {{ .Values.replicaCount }}
  selector:
    matchLabels:
      app:  {{ .Release.Name }}
      chart:  {{ .Chart.Name }}
  template:
    metadata:
      labels:
        app:  {{ .Release.Name }}
        chart:  {{ .Chart.Name }}
    spec:
      {{-  with .Values.nodeSelector }}
      nodeSelector:
        name: {{ .Release.Name }}
      {{- toYaml . | nindent 8 }}
      {{- end }}
      containers:
      - image: {{ .Values.image.repository }}:{{ .Values.image.tag }}
        name: {{ .Release.Name }}
        resources: {}
status: {}

    • 此时执行部署会出现报错

      Error: template: nginx/templates/deployment.yaml:22:25: executing "nginx/templates/deployment.yaml" at <.Release.Name>: nil pointer evaluating interface {}.Name


    • 解决方法

      在全局变量前面加上$ 或者 在with 前面将全局变量的值赋值给一个变量, with内调用这个变量

    spec:
      {{-  with .Values.nodeSelector }}
      nodeSelector:
        name: {{ $.Release.Name }}
      {{- toYaml . | nindent 8 }}
      {{- end }}


    spec:
      {{- $releasename := $.Release.Name -}}
      {{-  with .Values.nodeSelector }}
      nodeSelector:
        name: {{ $releasename }}
      {{- toYaml . | nindent 8 }}
      {{- end }}

    range解压赋值

    • values.yaml
    env:
  jvm.options:
    -Xms128M
    -Xmx128M
  path: /usr/local/elasticsearch-6.6.0/data
  log: /usr/local/elasticsearch-6.6.0/logs
  network: 127.0.0.1
  port: 9200

    • deployment.yaml
    spec:
      {{- $releasename := $.Release.Name -}}
      {{-  with .Values.nodeSelector }}
      nodeSelector:
        name: {{ $releasename }}
      {{- toYaml . | nindent 8 }}
      {{- end }}
      containers:
      - image: {{ .Values.image.repository }}:{{ .Values.image.tag }}
        name: {{ .Release.Name }}
        env:
        {{- range $k, $v := .Values.env }}
        - name: {{ $k }}
          value: {{ $v }}
        {{- end }}
        resources: {}

    • 验证下
    helm install web2 /root/helm/nginx/ --dry-run


    命名模板

    • helper.tpl
    {{- define "name" -}}
{{ .Chart.Name }}-{{ .Release.Name }}
{{- end -}}

{{- define "labels" -}}
chart: {{ .Chart.Name }}-{{ .Chart.Version }}
app: {{ template "name" . }}
{{- end -}}

    • deployment.yaml
    apiVersion: apps/v1
kind: Deployment
metadata:
  labels:
    {{- include "labels" . | nindent 4 }}
  name: {{ template "name" . }}
spec:
  replicas: {{ .Values.replicaCount }}
  selector:
    matchLabels:
      app:  {{ .Release.Name }}
      chart:  {{ .Chart.Name }}
  template:
    metadata:
      labels:
        app:  {{ .Release.Name }}
        chart:  {{ .Chart.Name }}
    spec:
      {{- with .Values.nodeSelector }}
      nodeSelector:
      {{- toYaml . |nindent 8 }}
      {{- end }}
      containers:
      - image: {{ .Values.image.repository }}:{{ .Values.image.tag }}
        name: {{ .Release.Name }}
        resources: {}
status: {}

    • 验证
    helm install web /root/helm/nginx/ --dry-run


    helm搭建私有仓库

    参考: https://blog.51cto.com/14268033/2455006?source=dra


    安装minio服务端

    wget  https://dl.min.io/server/minio/release/linux-amd64/minio
chmod +x minio
mkdir  -p  /chart
./minio server /chart


    • 输入 http://172.16.240.100:9000/minio/login ,通过浏览器访问


    • 在启动日志中获取access key和secret key


    安装minio客户端

    wget  https://dl.min.io/client/mc/release/linux-amd64/mc
chmod +x mc

    连接到服务端

    命令在启动日志中有

    ./mc config host add myminio http://192.168.189.217:9000 minioadmin minioadmin

    创建bucket

    ./mc mb myminio/minio-helm-repo

    设置bucket和objects匿名访问

    ./mc policy set download myminio/minio-helm-repo
mkdir /root/helm/repo
helm repo index helm/repo/
./mc  cp  helm/repo/index.yaml  myminio/minio-helm-repo

    helm创建与仓库连接的index.yaml文件

    mkdir /root/helm/repo
helm repo index helm/repo/

    helm与minio仓库进行连接


    1. 将index.yaml文件推送到backet中去

    ./mc  cp  helm/repo/index.yaml  myminio/minio-helm-repo

    2. helm连接私有仓库

    helm repo add myrepo http://172.16.240.100:9000/minio-helm-repo


    3. 更新repo仓库

    helm  repo  update


    4 .查看repo

    helm repo list


    5. 查看repo中的文件

     ./mc ls helm/repo/

  • 相关阅读:
    开放源码的对象关系映射工具ORM.NET 插入数据 Insert/Update Data
    开放源码的对象关系映射工具ORM.NET 快档开发入门 Quick Start
    .NET 动态脚本语言Script.NET 开发指南
    开放源码的对象关系映射工具ORM.NET 删除数据 Deleting Records using ORM.NET
    .NET Remoting过时了吗？为什么公司的项目还是选择用.NET Remoting,而不是WCF?
    开放源码的对象关系映射工具ORM.NET 查看和显示数据 View and Display data using ORM.NET
    开放源码的对象关系映射工具ORM.NET 查询表 调用存储过程 增加自定义代码
    技术人生：坚持，每日一博
    CQRS：CQRS + DDD + MDP 实现快速应用程序开发
    NodeJs：Happy代码生成器，重构了代码，更新了文档，完善了示例，欢迎下载使用
  • 原文地址：https://www.cnblogs.com/cjwnb/p/12571199.html
Copyright © 2020-2023  润新知