Kubernetes
又简称k8s
,是Google
开源的容器集群管理系统,最近也是火热。闲来无事(为了发文),捣鼓了一下,在Mac上搭建Kubernetes
,遇到一些坑,也记录一下。
另外,Docker
相关的概念可参考下面文章:Docker入门——理解Docker的核心概念。
当Mac安装完Docker Desktop
后,可以启动Docker
了,而要启动Kubernetes
,需要Enable
。
本以为就如此简单方便,谁料一直显示Kubernetes is starting
,卡了很久都没有反应。那是由于网络原因
(你懂的),启动Kubernetes
所需要的镜像无法下载。
所需镜像可以手动一个个下载,当然也有人准备好了脚本可以一键下载,脚本在仓库:https://github.com/hummerstudio/k8s-docker-desktop-for-mac 上。
将仓库克隆下来:
$ git clone https://github.com/hummerstudio/k8s-docker-desktop-for-mac.git
然后看一下文件image_list
上的版本跟自己安装的版本能不能对得上,建议直接更新Docker Desktop
为最新版本。
$ cat image_list k8s.gcr.io/kube-proxy:v1.16.5=gotok8s/kube-proxy:v1.16.5 k8s.gcr.io/kube-controller-manager:v1.16.5=gotok8s/kube-controller-manager:v1.16.5 k8s.gcr.io/kube-scheduler:v1.16.5=gotok8s/kube-scheduler:v1.16.5 k8s.gcr.io/kube-apiserver:v1.16.5=gotok8s/kube-apiserver:v1.16.5 k8s.gcr.io/coredns:1.6.2=gotok8s/coredns:1.6.2 k8s.gcr.io/pause:3.1=gotok8s/pause:3.1 k8s.gcr.io/etcd:3.3.15-0=gotok8s/etcd:3.3.15-0 k8s.gcr.io/kubernetes-dashboard-amd64=gotok8s/kubernetes-dashboard-amd64:v1.10.1
同为v1.16.5
版本:
没有问题就可以执行脚本拉取相关镜像:
$ ./load_images.sh
下载完成后,重启Kubernetes
,验证 Kubernetes
集群状态:
$ kubectl cluster-info $ kubectl get nodes $ kubectl describe node
Dashboard
并不是必须的,它可以方便我们查看和操作,建议还是安装。将文件( https://raw.githubusercontent.com/kubernetes/dashboard/v2.0.3/aio/deploy/recommended.yaml )下载到本地,然后执行以下命令即可:
$ kubectl apply -f recommended.yaml namespace/kubernetes-dashboard created serviceaccount/kubernetes-dashboard created service/kubernetes-dashboard created secret/kubernetes-dashboard-certs created secret/kubernetes-dashboard-csrf created secret/kubernetes-dashboard-key-holder created configmap/kubernetes-dashboard-settings created role.rbac.authorization.k8s.io/kubernetes-dashboard created clusterrole.rbac.authorization.k8s.io/kubernetes-dashboard created rolebinding.rbac.authorization.k8s.io/kubernetes-dashboard created clusterrolebinding.rbac.authorization.k8s.io/kubernetes-dashboard created deployment.apps/kubernetes-dashboard created service/dashboard-metrics-scraper created deployment.apps/dashboard-metrics-scraper created
启动:
$ kubectl proxy
建议使用下面命令启动,不然会一直占着终端:
$ nohup kubectl proxy >/dev/null &
启动后可登陆访问:http://localhost:8001/api/v1/namespaces/kubernetes-dashboard/services/https:kubernetes-dashboard:/proxy/#/login
界面如下:
需要获取Token
,命令如下:
$ kubectl -n kube-system describe secret default| awk '$1=="token:"{print $2}' eyJhbGciOiJSUzI1NiIsImtpZCI6IjNiT1o4eW5ORHpkVlp6Q2VJakxMOENlZEUxSU16YmRZcHZqV3BfXzhQTm8ifQ.eyJpc3MiOiJrdWJlcm5ldGVzL3NlcnZpY2VhY2NvdW50Iiwia3ViZXJuZXRlcy5pby9zZXJ2aWNlYWNjb3VudC9uYW1lc3BhY2UiOiJrdWJlLXN5c3RlbSIsImt1YmVybmV0ZXMuaW8vc2VydmljZWFjY291bnQvc2VjcmV0Lm5hbWUiOiJkZWZhdWx0LXRva2VuLTJoNnpkIiwia3ViZXJuZXRlcy5pby9zZXJ2aWNlYWNjb3VudC9zZXJ2aWNlLWFjY291bnQubmFtZSI6ImRlZmF1bHQiLCJrdWJlcm5ldGVzLmlvL3NlcnZpY2VhY2NvdW50L3NlcnZpY2UtYWNjb3VudC51aWQiOiJhODk5MDkwMS1hOWE4LTQyZTAtOGMxNi1iNmQwZTY1NjgyZTEiLCJzdWIiOiJzeXN0ZW06c2VydmljZWFjY291bnQ6a3ViZS1zeXN0ZW06ZGVmYXVsdCJ9.Oo1Sa5GcWC7SknJ_qoGgoIXyGJKIp1nB4ApZqvTsj32DcoAA4mBmo0VB_zqdmlG0x29FO132x_6I2ejOnCwZ9IRlUWBtEYsKCChZb9kUjbAA9FLyIln4AW0K3V7F1ns_YIKLYaudnkHJPWpqE2FXwTVDs-ZpGgUUk2Fs-Sw8KEFOLnHNFzi-lIajsbicmUMyKPimcv51vN-Mgc9gH-_PfvLKBL-h3vbsCep-0xsRE2zOtsfqv9cbaVNhFaYkVvZuYzCBD1TY9v5Q5R6jPsB2IBZzEYMKw8lHGNrPzN0vrKCM_VBRSeUgzUnjAH6MLuVVWbzBmYYiOluCjuAyKf1eWA
就可以通过Token
登陆了。Dashboard
界面如下所示:
至此,安装已经完成,后面再通过一个小案例讲解如何应用。注意我的电脑连了阿里云的镜像仓库,需要设置的请自动Google
。想玩k8s
还有其它方式搭建环境,如Minikube
,以后有机会再折腾吧。
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