k8s~helm3更方便的部署

上級講了helm2的安裝，而且在安裝過程當中可能會出現問題，主要是與k8s版本衝突的問題，而最新的helm3對整個helm的架構都有了一個改進，它只有一個客戶端的helm程序，由它進行鏈接k8s集羣，完成對charts的部署工做。

下載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"

添加公用的倉庫

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

指定對應的k8s集羣

這一步很是關鍵，它是helm與k8s通信的保證，這一步就是把k8s環境變量KUBECONFIG進行配置

export KUBECONFIG=/root/.kube/config #能夠寫到/etc/profile裏

查詢一個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

構建一個nginx的用例

helm create nginx
 helm nignx-demo ./nginx

查詢咱們的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

也能夠使用helm命令來查看

[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

這樣一個最簡單的helm應用就創建好了！