1. 简介

helm的作用就是把许多的定义比如svc，deployment，seucrt一次性全部定义好，放在源里统一管理，方便部署到其他集群上。

2. 安装helm

https://github.com/helm/helm/releases/tag/v3.2.1

tar zxf helm-v3.2.1-linux-amd64.tar.gz
mv linux-amd64/helm /usr/local/bin/

编辑/etc/profile
source <(helm completion bash)
保存退出
source /etc/profil

3. helm仓库

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helm repo list

helm repo add azure http://mirror.azure.cn/kubernetes/charts/
helm repo add github https://burdenbear.github.io/kube-charts-mirror
helm repo add stable https://kubernetes.oss-cn-hangzhou.aliyuncs.com/charts

4. 实例

4.1 搜索镜像

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[root@node001 chap11-helm]# helm search repo mysql
NAME                           	CHART VERSION	APP VERSION	DESCRIPTION                                       
azure/mysql                    	1.6.9        	5.7.30     	DEPRECATED - Fast, reliable, scalable, and easy...
azure/mysqldump                	2.6.2        	2.4.1      	DEPRECATED! - A Helm chart to help backup MySQL...
azure/prometheus-mysql-exporter	0.7.1        	v0.11.0    	DEPRECATED A Helm chart for prometheus mysql ex...
stable/mysql                   	0.3.5        	           	Fast, reliable, scalable, and easy to use open-...
azure/percona                  	1.2.3        	5.7.26     	DEPRECATED - free, fully compatible, enhanced, ...
azure/percona-xtradb-cluster   	1.0.8        	5.7.19     	DEPRECATED - free, fully compatible, enhanced, ...
azure/phpmyadmin               	4.3.5        	5.0.1      	DEPRECATED phpMyAdmin is an mysql administratio...
stable/percona                 	0.3.0        	           	free, fully compatible, enhanced, open source d...
stable/percona-xtradb-cluster  	0.0.2        	5.7.19     	free, fully compatible, enhanced, open source d...
azure/gcloud-sqlproxy          	0.6.1        	1.11       	DEPRECATED Google Cloud SQL Proxy                 
azure/mariadb                  	7.3.14       	10.3.22    	DEPRECATED Fast, reliable, scalable, and easy t...
stable/gcloud-sqlproxy         	0.2.3        	           	Google Cloud SQL Proxy                            
stable/mariadb                 	2.1.6        	10.1.31    	Fast, reliable, scalable, and easy to use open-...

4.2 下载镜像

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helm pull azure/mysql --version 1.6.9

4.3 解压编辑

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tar xf mysql-1.6.9.tgz

[root@node001 chap11-helm]# ll mysql
total 36
-rw-r--r-- 1 root root   406 Nov 14  2020 Chart.yaml
-rw-r--r-- 1 root root 23661 Nov 14  2020 README.md
drwxr-xr-x 3 root root   268 Sep 13 18:26 templates
-rw-r--r-- 1 root root  6171 Sep 13 18:24 values.yaml

4.4 安装

helm install 名字 chart目录

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helm install mysql .

[root@node001 mysql]# helm ls
NAME 	NAMESPACE  	REVISION	UPDATED                              	STATUS  	CHART      	APP VERSION
mysql	chap11-helm	1       	2022-09-13 18:27:27.3973064 +0800 CST	deployed	mysql-1.6.9	5.7.30

5. 私有源

5.1 打包chat

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[root@node001 chap11-helm]# helm package mysql/
Successfully packaged chart and saved it to: /root/chap11-helm/mysql-1.6.9.tgz

5.2 创建nginx服务

创建仓库目录

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mkdir mychat

启动服务

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nerdctl run -d --name=c1 -p 8880:80 -v /mychart:/usr/share/nginx/html/mychart docker.io/nginx

5.3 创建chart索引文件

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helm repo index . --url http://192.168.10.31:8880/mychart

移动paackage

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cp index.yaml mysql-1.6.9.tgz /mychart/

5.4 添加私有仓库

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helm repo add mychart http://192.168.10.31:8880/mychart

5.5 查看仓库

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[root@node001 chap11-helm]# helm search repo mychart
NAME         	CHART VERSION	APP VERSION	DESCRIPTION                                       
mychart/mysql	1.6.9        	5.7.30     	DEPRECATED - Fast, reliable, scalable, and easy...

6. prometheus

6.1 添加官方源

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helm repo add stable https://kubernetes.oss-cn-hangzhou.aliyuncs.com/charts
helm repo add prometheus-community https://prometheus-community.github.io/helm-charts

6.2 下载chart

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helm pull prometheus-community/kube-prometheus-stack

6.3 安装

编辑修改后安装

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helm install prometheus kube-prometheus-stack

6.4 查看release

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[root@node001 chap11-helm]# helm ls
NAME      	NAMESPACE  	REVISION	UPDATED                              	STATUS  	CHART                       	APP VERSION
mysql     	chap11-helm	1       	2022-09-13 23:37:14.0590291 +0800 CST	deployed	mysql-1.6.9                 	5.7.30     
prometheus	chap11-helm	1       	2022-09-14 00:04:46.9828275 +0800 CST	deployed	kube-prometheus-stack-20.0.1	0.52.0

6.5 修改svc

修改grafana的svc为LoadBalancer

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[root@node001 chap11-helm]# kubectl get svc prometheus-grafana 
NAME                 TYPE           CLUSTER-IP       EXTERNAL-IP      PORT(S)        AGE
prometheus-grafana   LoadBalancer   10.106.183.246   192.168.10.244   80:32592/TCP   9m23

6.6 获取密码

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kubectl get secrets prometheus-grafana -o jsonpath='{.data.admin-password}'|base64 -d

7. 日志

ELK
Elasticsearch #是个开源分布式搜索引擎，存储日志及提供查询接口。
Logstash #是一个完全开源的工具，他可以对日志进行收集 发送给Elasticsearch.
Kibana #是一个开源和免费的，web界面的工具，可以让用户浏览Elasticsearch里的日志.
logstash性能低，消耗资源，且存在不支持消息队列缓存及存在数据丢失的问题
所以logstash一般可以用fluentd或者filebeat替代
EFK框架