k8s~helm3更方便的部署
上级讲了helm2的安装,并且在安装过程中可能会出现问题,主要是与k8s版本冲突的问题,而最新的helm3对整个helm的架构都有了一个改进,它只有一个客户端的helm程序,由它进行连接k8s集群,完成对charts的部署工作。
下载helm3
https://get.helm.sh/helm-v3.0.0-linux-amd64.tar.gz
查看配置信息
[root@i-pcwovafu bin]# helm env
HELM_NAMESPACE="default"
HELM_KUBECONTEXT=""
HELM_BIN="helm"
HELM_DEBUG="false"
HELM_PLUGINS="/root/.local/share/helm/plugins"
HELM_REGISTRY_CONFIG="/root/.config/helm/registry.json"
HELM_REPOSITORY_CACHE="/root/.cache/helm/repository"
HELM_REPOSITORY_CONFIG="/root/.config/helm/repositories.yaml"
添加公用的仓库
helm repo add stable http://mirror.azure.cn/kubernetes/charts
helm repo add aliyun https://kubernetes.oss-cn-hangzhou.aliyuncs.com/charts
helm repo update
指定对应的k8s集群
这一步非常关键,它是helm与k8s通讯的保证,这一步就是把k8s环境变量KUBECONFIG进行配置
export KUBECONFIG=/root/.kube/config #可以写到/etc/profile里
查询一个charts
[root@i-pcwovafu ~]# helm search hub nginx
URL CHART VERSION APP VERSION DESCRIPTION
https://hub.helm.sh/charts/choerodon/nginx-file... 0.1.0 1.13.5-alpine A Helm chart for Kubernetes
https://hub.helm.sh/charts/cloudposse/nginx-ing... 0.1.8 A Helm chart for Nginx Ingress
https://hub.helm.sh/charts/cloudposse/nginx-def... 0.5.0 A Helm chart for nginx-default-backend to be us...
https://hub.helm.sh/charts/cloudposse/fail-whale 0.1.1 A Helm chart that provides a mainte
构建一个nginx的用例
helm create nginx
helm nignx-demo ./nginx
查询我们的nginx pod
[root@i-pcwovafu bin]# rancher kubectl get pods -n default
NAME READY STATUS RESTARTS AGE
web-nginx-858f7d9cc5-hlhkj 1/1 Running 0 2m14s
也可以使用helm命令来查看
[root@i-pcwovafu bin]# helm list
NAME NAMESPACE REVISION UPDATED STATUS CHART APP VERSION
web-nginx default 1 2020-04-07 17:09:53.480335758 +0800 CST deployed nginx-0.1.0 1.16.0
这样一个最简单的helm应用就建立好了!