Kubernetes1.18实践及踩坑（之六）部署Helm

1、安装Helm Client

[root@master01 tmp]# wget https://get.helm.sh/helm-v2.16.6-linux-amd64.tar.gz
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[root@master01 tmp]# tar -zxvf helm-v2.16.6-linux-amd64.tar.gz

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[root@master01 tmp]# mv linux-amd64/helm /usr/local/bin/
[root@master01 tmp]# helm version
Client: &version.Version{SemVer:"v2.16.6", GitCommit:"dd2e5695da88625b190e6b22e9542550ab503a47", GitTreeState:"clean"}
Error: could not find tiller

2、安装tiller

[root@master01 tmp] kubectl create serviceaccount --namespace kube-system tiller
.....................
[root@master01 tmp] kubectl create clusterrolebinding tiller-cluster-rule --clusterrole=cluster-admin --serviceaccount=kube-system:tiller
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[root@master01 tmp] helm init --upgrade -i registry.cn-hangzhou.aliyuncs.com/google_containers/tiller:v2.16.6 --stable-repo-url https://kubernetes.oss-cn-hangzhou.aliyuncs.com/charts --service-account tiller

     这时发现 pod  tiller-deploy-549b9d7484-7lzdp 下载失败，那是因为被墙了。修改一下image的源即可。

[root@master01 ~]# kubectl edit deployment tiller-deploy -n kube-system

   修改containers属性为：  image: sapcc/tiller:v2.16.6，保存即可。

3、用helm部署一个应用（tomcat）

•    首先，需配置nfs，请参见前一篇文章：Kubernetes1.18实践及踩坑（之五）持久化（NFS）
•    创建pv-tomcat.yaml

apiVersion: v1
kind: PersistentVolume
metadata:
  name: pv-tomcat
  namespace: default
spec:
  capacity:
    storage: 10Gi
  accessModes:
    - ReadWriteOnce
  persistentVolumeReclaimPolicy: Recycle
  nfs:
    path: /usr/local/work/nfs/tomcat
    server: 192.168.100.51

• 部署tomcat

[root@master01 ~]# helm install --name my-tomcat bitnami/tomcat
.................
[root@master01 ~]# helm list
NAME            REVISION        UPDATED                         STATUS          CHART           APP VERSION     NAMESPACE
my-tomcat       1               Sun Apr 26 00:10:43 2020        DEPLOYED        tomcat-6.3.5    9.0.34          default
[root@master01 ~]# kubectl get services
NAME             TYPE           CLUSTER-IP      EXTERNAL-IP   PORT(S)        AGE
kubernetes       ClusterIP      10.10.0.1               443/TCP        8d
my-tomcat        LoadBalancer   10.10.101.127        80:32456/TCP   26h

可以看到已经部署成功，通过cluster ip  10.10.101.127 即可访问。

注：helm会自动创建一个pvc以关联pv-tomcat。