实验要求：成功部署Kubernetes
基础操作
Helm官方版本大全；下载软件包并解压和移动目录
[root@k8s-master opt]# wget https://get.helm.sh/helm-v3.0.0-linux-amd64.tar.gz
[root@k8s-master opt]# tar -zxf helm-v3.0.0-linux-amd64.tar.gz
[root@k8s-master opt]# mv linux-amd64/helm /usr/bin/
配置helm仓库地址
微软云的heml；添加仓库地址并查看
[root@k8s-master ~]# helm repo add stable http://mirror.azure.cn/kubernetes/charts
"stable" has been added to your repositories
[root@k8s-master ~]# helm repo list
NAME URL
stable http://mirror.azure.cn/kubernetes/charts
[root@k8s-master ~]#
查看K8s的UI并部署
[root@k8s-master ~]# helm search repo weave
NAME CHART VERSION APP VERSION DESCRIPTION
stable/weave-cloud 0.3.9 1.4.0 DEPRECATED - Weave Cloud is a add-on to Kuberne...
stable/weave-scope 1.1.12 1.12.0 DEPRECATED - A Helm chart for the Weave Scope c...
[root@k8s-master ~]# helm install ui stable/weave-scope
查看部署好的hlem
[root@k8s-master ~]# helm list
NAME NAMESPACE REVISION UPDATED STATUS CHART APP VERSION
ui default 1 2021-12-03 16:47:19.373957437 +0800 CST deployed weave-scope-1.1.12 1.12.0
[root@k8s-master ~]# kubectl get pods,svc
修改ui-weave-scope中SVC的type: NodePort,使其能够在浏览器中访问
[root@k8s-master ~]# kubectl edit svc/ui-weave-scope
service/ui-weave-scope edited
[root@k8s-master ~]# kubectl get svc
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
java NodePort 10.96.187.217 <none> 80:31518/TCP 85m
kubernetes ClusterIP 10.96.0.1 <none> 443/TCP 168m
nginx NodePort 10.96.79.79 <none> 80:30003/TCP 68m
ui-weave-scope NodePort 10.96.153.12 <none> 80:30763/TCP 6m8s
[root@k8s-master ~]#
浏览器验证：http://NodeIP:Port
创建chart
helm create 名字----创建一个chart基础模板
[root@k8s-master ~]# helm create mychar
Creating mychar
[root@k8s-master ~]# cd mychar/
[root@k8s-master mychar]# ls
charts Chart.yaml templates values.yaml
charts：一般不放文件。
Chart.yaml：当前chart的属性信息，如名字。
templates：当前chart的所有模板文件。
values.yaml：所有yaml的全局变量。
使用chart部署应用
#清除原先templates目录下的内容
[root@k8s-master mychar]# rm -rf templates/*
[root@k8s-master mychar]# ls templates/
#将所需要的yaml文件移到当前chart下的templates目录中
[root@k8s-master mychar]# mv /opt/tomcat-java-demo-master/nginx.yaml templates/
[root@k8s-master mychar]# mv /opt/tomcat-java-demo-master/nginx-svc.yaml templates/
#直接使用chart安装应用；web是名字可以随便起
[root@k8s-master ~]# helm install web mychar/
NAME: web
LAST DEPLOYED: Fri Dec 3 17:08:39 2021
NAMESPACE: default
STATUS: deployed
REVISION: 1
TEST SUITE: None
[root@k8s-master ~]# helm list
NAME NAMESPACE REVISION UPDATED STATUS CHART APP VERSION
ui default 1 2021-12-03 16:47:19.373957437 +0800 CST deployed weave-scope-1.1.12 1.12.0
web default 1 2021-12-03 17:08:39.060358707 +0800 CST deployed mychar-0.1.0 1.16.0
#查看当前创建的svc和容器
[root@k8s-master ~]# kubectl get svc,pods
升级
动态传参:helm upgrade helm名字 --set 需要修改的内容 chart名字
[root@k8s-master ~]# helm upgrade web --set replicas=3 mychar/
Release "web" has been upgraded. Happy Helming !NAME: web1
LAST DEPLOYED: Fri Dec 3 17:10:56 2021NAMESPACE: default
STATUS: deployedREVISION :2
TEST SUITE: None
[root@k8s-master ~]# helm list
[root@k8s-master ~]# kubectl get pods
回滚
helm rollback helm名字 版本号
[root@k8s-master ~]# helm history web
REVISION UPDATED STATUS CHART APP VERSION DESCRIPTION
1 Fri Dec 3 17:08:42 2021 superseded mychar-0.1.0 1.16.0
Install complete
2 Fri Dec 3 17:10:56 2021 deployed mychart-0.1.0 1.16.0
Upgrade complete
[root@k8s-master ~]# helm rollback web 1
Rollback was a success! Happy Helming!