kubernetes helm部署

一 环境
kubernetes 版本:v1.11.2

[root@dev-master-105 helm-2.11.0]# kubectl version 
Client Version: version.Info{Major:"1", Minor:"11+", GitVersion:"v1.11.0-168+f47446a730ca03", GitCommit:"f47446a730ca037473fb3bf0c5abeea648c1ac12", GitTreeState:"clean", BuildDate:"2018-08-25T21:05:52Z", GoVersion:"go1.10.3", Compiler:"gc", Platform:"linux/amd64"}
Server Version: version.Info{Major:"1", Minor:"11+", GitVersion:"v1.11.0-168+f47446a730ca03", GitCommit:"f47446a730ca037473fb3bf0c5abeea648c1ac12", GitTreeState:"clean", BuildDate:"2018-08-25T21:05:52Z", GoVersion:"go1.10.3", Compiler:"gc", Platform:"linux/amd64"}

linux 版本:

[root@dev-master-105 helm-2.11.0]# uname -a 
Linux dev-master-105 3.10.0-514.el7.x86_64 #1 SMP Tue Nov 22 16:42:41 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux

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二 安装

获取helm文件

wget https://storage.googleapis.com/kubernetes-helm/helm-v2.11.0-linux-amd64.tar.gz
## 解压
tar -zvxf helm-v2.11.0-linux-amd64.tar.gz
[root@dev-master-105 helm]# ls -l 
total 18708
-rw-r--r-- 1 root root 19149273 Oct 22 15:20 helm-v2.11.0-linux-amd64.tar.gz
drwxr-xr-x 2 root root     4096 Sep 26 02:17 linux-amd64
##移动二进制文件
[root@dev-master-105 helm]# mv linux-amd64/helm /usr/local/bin/helm

初始化

[root@dev-master-105 test]# helm init
$HELM_HOME has been configured at /root/.helm.

Tiller (the Helm server-side component) has been installed into your Kubernetes Cluster.

Please note: by default, Tiller is deployed with an insecure 'allow unauthenticated users' policy.
To prevent this, run `helm init` with the --tiller-tls-verify flag.
For more information on securing your installation see: https://docs.helm.sh/using_helm/#securing-your-helm-installation
Happy Helming!

查看tiller是否已经起来

[root@dev-master-105 test]# helm version 
Client: &version.Version{SemVer:"v2.11.0", GitCommit:"2e55dbe1fdb5fdb96b75ff144a339489417b146b", GitTreeState:"clean"}
Error: could not find a ready tiller pod

发现没有起来,检查错误
通过kubectl describe pod tiller-deploy-7f4974b9c8-drbs4 -n kube-system 查看,是因为网络的问题

Node-Selectors:  
Tolerations:     node.kubernetes.io/not-ready:NoExecute for 300s
                 node.kubernetes.io/unreachable:NoExecute for 300s
Events:
  Type     Reason          Age               From                        Message
  ----     ------          ----              ----                        -------
  Normal   Scheduled       11m               default-scheduler           Successfully assigned kube-system/tiller-deploy-7f4974b9c8-drbs4 to dev-slave-testnet
  Normal   SandboxChanged  10m               kubelet, dev-slave-testnet  Pod sandbox changed, it will be killed and re-created.
  Warning  Failed          8m (x6 over 10m)  kubelet, dev-slave-testnet  Error: ImagePullBackOff
  Normal   Pulling         7m (x4 over 11m)  kubelet, dev-slave-testnet  pulling image "gcr.io/kubernetes-helm/tiller:v2.11.0"
  Warning  Failed          7m (x4 over 10m)  kubelet, dev-slave-testnet  Failed to pull image "gcr.io/kubernetes-helm/tiller:v2.11.0": rpc error: code = Unknown desc = Get https://gcr.io/v1/_ping: dial tcp 64.233.187.82:443: i/o timeout
  Normal   BackOff         6m (x9 over 10m)  kubelet, dev-slave-testnet  Back-off pulling image "gcr.io/kubernetes-helm/tiller:v2.11.0"
  Warning  Failed          1m (x6 over 10m)  kubelet, dev-slave-testnet  Error: ErrImagePull

解决办法1.helm reset
需要指定镜像

helm init -i 990570827/tiller:v2.11.0

如果之前部署不成功，那么就得修改之前的deployment

查看状态

[root@dev-master-105 test]# 
[root@dev-master-105 test]# kubectl get pods -n kube-system -owide | grep tiller-deploy
tiller-deploy-5849c585c7-8xqnn              1/1       Running            0          32s       192.168.72.23     dev-slave-testnet   

出现问题

[root@dev-master-105 test]# helm version 
Client: &version.Version{SemVer:"v2.11.0", GitCommit:"2e55dbe1fdb5fdb96b75ff144a339489417b146b", GitTreeState:"clean"}
E1022 16:27:57.047815   28426 portforward.go:331] an error occurred forwarding 33023 -> 44134: error forwarding port 44134 to pod 612a0e878789aa021c80b3d2f7e7514fba75c908a0da285205c13c06b5605c02, uid : unable to do port forwarding: socat not found.
Error: cannot connect to Tiller

解决办法 安装

yum install socat -y

问题解决

[root@dev-master-105 test]# helm version 
Client: &version.Version{SemVer:"v2.11.0", GitCommit:"2e55dbe1fdb5fdb96b75ff144a339489417b146b", GitTreeState:"clean"}
Server: &version.Version{SemVer:"v2.11.0", GitCommit:"2e55dbe1fdb5fdb96b75ff144a339489417b146b", GitTreeState:"clean"}

测试

helm install stable/mariadb

[root@dev-master-105 ~]# helm list 
NAME             	REVISION	UPDATED                 	STATUS  	CHART           	APP VERSION	NAMESPACE
sad-greyhound    	1       	Mon Dec  4 17:16:27 2017	DEPLOYED	mysql-0.3.0     	           	default  
solitary-hedgehog	1       	Mon Oct 22 17:07:12 2018	DEPLOYED	mariadb-2.0.0   	10.1.28    	default  
wwwwddd          	1       	Wed Dec  6 14:28:01 2017	DEPLOYED	wordpress-0.6.13	           	default 

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另一种安装方式是直接通过脚本安装

curl https://raw.githubusercontent.com/kubernetes/helm/master/scripts/get | bash

参考：
官方文档
helm 部署
中文文档