在Kubernetes上进行容器化部署并非易事,docker、环境变量、存储、网络等方面都会涉及到,这些复杂的操作可以被Helm应用包管理工具实现,避免了全手工操作的,Helm官网:https://helm.sh
ssh登录到可以执行kubectl操作的服务器:
tar -zxvf helm-v2.16.1-linux-amd64.tar.gz
mv linux-amd64/helm /usr/local/bin/
[root@node1 ~]# helm version
Client: &version.Version{SemVer:"v2.16.1", GitCommit:"bbdfe5e7803a12bbdf97e94cd847859890cf4050", GitTreeState:"clean"}
Error: could not find tiller
客户端部署完毕,接下来要把ServiceAccount和角色绑定建好
kubectl create serviceaccount --namespace kube-system tiller
kubectl create clusterrolebinding tiller-cluster-rule --clusterrole=cluster-admin --serviceaccount=kube-system:tiller
helm init --upgrade -i registry.cn-hangzhou.aliyuncs.com/google_containers/tiller:v2.16.1 --stable-repo-url https://kubernetes.oss-cn-hangzhou.aliyuncs.com/charts --service-account tiller
[root@node1 ~]# helm version
Client: &version.Version{SemVer:"v2.16.1", GitCommit:"bbdfe5e7803a12bbdf97e94cd847859890cf4050", GitTreeState:"clean"}
Server: &version.Version{SemVer:"v2.16.1", GitCommit:"bbdfe5e7803a12bbdf97e94cd847859890cf4050", GitTreeState:"clean"}
现在helm已装好,接下来部署个应用试试
yum install nfs-utils -y
apiVersion: v1
kind: PersistentVolume
metadata:
name: pv-tomcat
namespace: default
spec:
capacity:
storage: 10Gi
accessModes:
- ReadWriteOnce
persistentVolumeReclaimPolicy: Recycle
nfs:
path: /usr/local/work/test/001
server: 192.168.133.142
kubectl create -f pv-tomcat.yaml
PV已经准备好,可以通过Helm部署应用了
helm repo add bitnami https://charts.bitnami.com/bitnami
[root@node1 ~]# helm search tomcat
NAME CHART VERSION APP VERSION DESCRIPTION
bitnami/tomcat 6.0.6 9.0.29 Chart for Apache Tomcat
helm install \
--name my-tomcat \
bitnami/tomcat
[root@node1 ~]# helm list
NAME REVISION UPDATED STATUS CHART APP VERSION NAMESPACE
my-tomcat 1 Sun Nov 24 20:29:16 2019 DEPLOYED tomcat-6.0.6 9.0.29 default
[root@node1 local]# kubectl get services
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
kubernetes ClusterIP 10.233.0.1 <none> 443/TCP 3h36m
my-tomcat LoadBalancer 10.233.16.166 <pending> 80:31229/TCP 100s
至此,实战结束,在您安装和使用Helm的时候,希望本文能给您一些参考;