Kubernetes: k8s 高级篇-中间件容器化-k8s包管理工具Operator和helm

helm repo add bitnami https://charts.bitnami.com/bitnami
helm repo add stable https://charts.helm.sh/stable
helm repo list

# 下载包
helm pull bitnami/zookeeper

# 修改values.yaml相应配置：副本数、auth、持久化
helm install -n public-service zookeeper .

helm install kafka bitnami/kafka --set zookeeper.enabled=false --set replicaCount=3 --set externalZookeeper.servers=zookeeper --set persistence.enabled=false -n public-service

下载一个包：helm pull
创建一个包：helm create
安装一个包：helm install
查看：helm list
查看安装参数：helm get values
查看原始参数：helm show values prometheus-community/kube-prometheus-stack
更新：helm upgrade
删除：helm delete
查看对应版本：helm search repo -l gitlab/gitlab-runner

helm upgrade --install -n gitlab-xcw gitlab . \
     --timeout 600s \
     --dry-run \
     -f customize_conf/values-prod.yaml \
     --set global.hosts.gitlab.name='git-xcw.tech.com' \
     `#--外部postgresql--` \
     `#--set postgresql.install=false` \
     `#--set global.psql.host=production.postgress.hostname.local` \
     `#--set global.psql.password.secret=gitlab-pg` \
     `#--set global.psql.password.key='password'` \
     `#--外部redis--` \
     `#--set redis.enabled=false` \
     `#--set global.redis.host='redis.example.com'` \
     `#--set global.redis.password.secret=gitlab-redis` \
     `#--set global.redis.password.key='password'` \
     --set gitlab.migrations.enabled=true 

├── charts # 依赖文件，如果依赖其它包可把对应包放这里
├── Chart.yaml # 当前chart的基本信息
apiVersion：Chart的apiVersion，目前默认都是v2
name：Chart的名称
type：图表的类型[可选]
version：Chart自己的版本号
appVersion：Chart内应用的版本号[可选]
description：Chart描述信息[可选]
├── templates # 模板位置
│ ├── deployment.yaml
│ ├── _helpers.tpl # 自定义的模板或者函数
│ ├── ingress.yaml
│ ├── NOTES.txt #Chart安装完毕后的提醒信息
│ ├── serviceaccount.yaml
│ ├── service.yaml
│ └── tests # 测试文件
│ └── test-connection.yaml
└── values.yaml #配置全局变量或者一些参数

helm list -A

helm get manifest <ReleaseName>

#deplyment.yaml:
apiVersion: apps/v1
kind: Deployment
metadata:
  name: {{ include "archery.fullname" . }}


#_help.tpl
{{/*
Create a default fully qualified app name.
We truncate at 63 chars because some Kubernetes name fields are limited to this (by the DNS naming spec).
If release name contains chart name it will be used as a full name.
*/}}
{{- define "archery.fullname" -}}
{{- if .Values.fullnameOverride -}}
{{- .Values.fullnameOverride | trunc 63 | trimSuffix "-" -}}
{{- else -}}
{{- $name := default .Chart.Name .Values.nameOverride -}}
{{- if contains $name .Release.Name -}}
{{- .Release.Name | trunc 63 | trimSuffix "-" -}}
{{- else -}}
{{- printf "%s-%s" .Release.Name $name | trunc 63 | trimSuffix "-" -}}
{{- end -}}
{{- end -}}
{{- end -}}

#_help.tpl
{{- define "imagePullSecret" }}
{{- with .Values.imageCredentials }}
{{- printf "{\"auths\":{\"%s\":{\"username\":\"%s\",\"password\":\"%s\",\"email\":\"%s\",\"auth\":\"%s\"}}}" .registry .username .password .email (printf "%s:%s" .username .password | b64enc) | b64enc }}
{{- end }}
{{- end }}

#values.yaml
imageCredentials:
  registry: quay.io
  username: someone
  password: sillyness
  email: [email protected]

#secret.yaml
 apiVersion: v1
kind: Secret
metadata:
  name: myregistrykey
type: kubernetes.io/dockerconfigjson
data:
  .dockerconfigjson: {{ template "imagePullSecret" . }} 

#values.yaml
deployment:
  labels: {}
  annotations: {}

#清单文件
## 转换为yaml格式, 并缩进4个空格,
apiVersion: apps/v1
kind: Deployment
metadata:
  {{- with .Values.deployment.annotations }}
  annotations:
    {{- toYaml . | nindent 4 }}
  {{- end }}

下载基本文件：
git clone https://github.com/dotbalo/k8s.git
cd k8s/k8s-rabbitmq-cluster ; kubectl create ns public-service ; kubectl apply -f .

helm create rabbitmq-cluster

rm -fr deployment.yaml hpa.yaml serviceaccount.yaml service.yaml tests