Helm 是个k8s 包管理工具

结为金丹客，方为我辈人。

概述

Helm 下载地址： https://github.com/helm/helm/releases

本文用的是：
https://get.helm.sh/helm-v2.16.0-linux-amd64.tar.gz

安装其客户端helm

[root@k8s-master2 ~]# wget https://get.helm.sh/helm-v2.16.0-linux-amd64.tar.gz
--2019-11-12 14:30:49--  https://get.helm.sh/helm-v2.16.0-linux-amd64.tar.gz
正在解析主机 get.helm.sh (get.helm.sh)... 152.199.39.108, 2606:2800:247:1cb7:261b:1f9c:2074:3c
正在连接 get.helm.sh (get.helm.sh)|152.199.39.108|:443... 已连接。
已发出 HTTP 请求，正在等待回应... 200 OK
长度：25264218 (24M) [application/x-tar]
正在保存至: “helm-v2.16.0-linux-amd64.tar.gz”

100%[=================================================================================================================================>] 25,264,218  3.37MB/s 用时 7.3s   

2019-11-12 14:31:00 (3.30 MB/s) - 已保存 “helm-v2.16.0-linux-amd64.tar.gz” [25264218/25264218])

[root@k8s-master2 ~]# 
[root@k8s-master2 ~]# 
[root@k8s-master2 ~]# 
[root@k8s-master2 ~]# ls
anaconda-ks.cfg  helm-v2.16.0-linux-amd64.tar.gz  k8s
[root@k8s-master2 ~]# 
[root@k8s-master2 ~]# 
[root@k8s-master2 ~]# 
[root@k8s-master2 ~]# 
[root@k8s-master2 ~]# tar -zxvf helm-v2.16.0-linux-amd64.tar.gz 
linux-amd64/
linux-amd64/README.md
linux-amd64/helm
linux-amd64/LICENSE
linux-amd64/tiller
[root@k8s-master2 ~]# ll
总用量 24680
-rw-------. 1 root root      952 10月 24 22:46 anaconda-ks.cfg
-rw-r--r--  1 root root 25264218 11月  6 23:31 helm-v2.16.0-linux-amd64.tar.gz
drwxr-xr-x  6 root root       73 11月  5 01:26 k8s
drwxr-xr-x  2 root root       60 11月  6 23:30 linux-amd64
[root@k8s-master2 ~]# mv linux-amd64/helm /usr/local/bin/helm
[root@k8s-master2 ~]# helm
The Kubernetes package manager

安装服务端Tiller

• 此处遇到了2个问题
  • 由于多次使用kubeadm 安装，导致了cni 网卡网段有问题；

  Warning  FailedCreatePodSandBox  4m28s (x736 over 49m)  kubelet, k8s-node3  (combined from similar events): Failed create pod sandbox: rpc error: code = Unknown desc = failed to set up sandbox container "3544615de0447ef1b6f672dfb2334d82ce4fee8a96f90914b5f0e06632744ea2" network for pod "tiller-deploy-786bc89dd8-7tfjw": networkPlugin cni failed to set up pod "tiller-deploy-786bc89dd8-7tfjw_kube-system" network: failed to set bridge addr: "cni0" already has an IP address different from 10.244.1.1/24

ifconfig 查看cni 网卡

[root@k8s-node3 ~]# ifconfig 
cni0: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
        inet 10.244.5.1  netmask 255.255.255.0  broadcast 0.0.0.0
        inet6 fe80::b404:edff:fea0:cb8f  prefixlen 64  scopeid 0x20<link>
        ether b6:04:ed:a0:cb:8f  txqueuelen 1000  (Ethernet)
        RX packets 31262  bytes 5357693 (5.1 MiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 33928  bytes 3804288 (3.6 MiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

重建之后(既删除cni0,k8s自动重建)：

[root@k8s-node3 ~]# ip link delete cni0
[root@k8s-node3 ~]# 
[root@k8s-node3 ~]# 
[root@k8s-node3 ~]# ifconfig 
cni0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1450
        inet 10.244.1.1  netmask 255.255.255.0  broadcast 0.0.0.0
        inet6 fe80::987c:2ff:fedb:41cb  prefixlen 64  scopeid 0x20<link>
        ether 9a:7c:02:db:41:cb  txqueuelen 1000  (Ethernet)
        RX packets 1  bytes 28 (28.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 3  bytes 266 (266.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

cni 恢复正常。

• 镜像问题
  直接helm init , 使用的是此镜像，gcr.io/kubernetes-helm/tiller:v2.16.0

这里使用阿里云源解决；

先配置个权限,在init :

[root@k8s-master2 ~]# kubectl create serviceaccount --namespace kube-system tiller
serviceaccount/tiller created
[root@k8s-master2 ~]# kubectl create clusterrolebinding tiller-cluster-rule --clusterrole=cluster-admin --serviceaccount=kube-system:tiller
clusterrolebinding.rbac.authorization.k8s.io/tiller-cluster-rule created
[root@k8s-master2 ~]# 
[root@k8s-master2 ~]# 
[root@k8s-master2 ~]# helm init --service-account tiller --upgrade -i registry.cn-hangzhou.aliyuncs.com/google_containers/tiller:v2.16.0 --stable-repo-url https://kubernetes.oss-cn-hangzhou.aliyuncs.com/charts

• 查看是否安装成功

[root@k8s-master2 ~]# helm version 
Client: &version.Version{SemVer:"v2.16.0", GitCommit:"e13bc94621d4ef666270cfbe734aaabf342a49bb", GitTreeState:"clean"}
Server: &version.Version{SemVer:"v2.16.0", GitCommit:"e13bc94621d4ef666270cfbe734aaabf342a49bb", GitTreeState:"clean"}

• 卸载服务端

如果需要删除服务端，可以使用下面的命令

helm reset

helm reset -f

当要移除helm init创建的目录等数据时,执行helm reset --remove-helm-home

• 删除应用

helm delete --purge my-jenkins