使用腳本在Linux服務器上自動安裝Kubernetes的包管理器Helm
Helm之於Kubernetes好比yum之於Red Hat Enterprise Linux，或者apt-get之於Ubuntu。
Helm是由helm CLI和Tiller組成，是典型的Client/Server應用。helm運行於客戶端，提供命令行界面；Tiller應用運行於Kubernetes內部。
在Jerry之前的文章裏曾經介紹過手動下載Helm安裝包，解壓後把執行文件拷貝到環境變量的做法。
其實還有另外一種全自動的做法，使用安裝腳本自動安裝。
1. 自動下載安裝腳本
curl https://raw.githubusercontent.com/helm/helm/master/scripts/get > get_helm.sh
打開腳本，可以看到helm安裝的環境變量HELM_INSTALL_DIR為/usr/local/bin:
2. chmod 700 get_helm.sh
./get_helm.sh:
3. 執行helm init, 看到Happy Helming消息，說明安裝成功。
Creating /root/.helm
Creating /root/.helm/repository
Creating /root/.helm/repository/cache
Creating /root/.helm/repository/local
Creating /root/.helm/plugins
Creating /root/.helm/starters
Creating /root/.helm/cache/archive
Creating /root/.helm/repository/repositories.yaml
Adding stable repo with URL: https://kubernetes-charts.storage.googleapis.com
Adding local repo with URL: http://127.0.0.1:8879/charts
$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!
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使用腳本在Linux服務器上自動安裝Kubernetes的包管理器Helm