使用kuberspay无坑安装生产级Kubernetes集群

JustinChia 2017-07-01

kuberspaykargo更名后的名称,我在前面写过一篇使用kargo快速自动化搭建kubernetes集群(各节点的准备信息也请参考该文),上篇文章的部署方式的缺陷还是需要科学上网,所以还是比较麻烦的。我又在另外一篇文章无坑畅玩minikube(利用阿里云镜像编译minikube),本文的原理与此文一致,使用阿里云里的镜像来安装Kubernetes集群。

1. 安装ansible

使用自动化运维工具ansible进行安装,我本机是MacOS,使用homebrew安装ansible:

brew install ansible

2. 修改kubespray代码

代码修改分别在以下的文件里,请查看源码,修改源码时主要参考阿里云里对应的镜像和版本,以防阿里云无此镜像,查看阿里云镜像请访问https://dev.aliyun.com/search.html

  • kubespray/roles/kubernetes-apps/ansible/defaults/main.yml
  • kubespray/roles/download/defaults/main.yml
  • kubespray/extra_playbooks/roles/download/defaults/main.yml
  • kubespray/inventory/group_vars/k8s-cluster.yml
  • kubespray/roles/dnsmasq/templates/dnsmasq-autoscaler.yml

本文的源码仅为演示作用,大家使用时候可能版本已经有变动,请下载kubespray源码,地址为:https://github.com/kubernetes-incubator/kubespray

3. inventory.cfg

kubespray/inventory/inventory.cfg,添加内容:

[all]
node1    ansible_host=192.168.1.130 ansible_user=root ip=192.168.1.130
node2    ansible_host=192.168.1.131 ansible_user=root ip=192.168.1.131
node3    ansible_host=192.168.1.132 ansible_user=root ip=192.168.1.132

[kube-master]
node1

[kube-node]
node2
node3

[etcd]
node1

[k8s-cluster:children]
kube-node
kube-master

4. 使用ansible安装

在kubespray根目录,执行:

ansible-playbook -u centos -b -i inventory/inventory.cfg cluster.yml

5. 验证安装

  • 登录130:ssh [email protected]
  • 查看node:kubectl get node
    NAME      STATUS                     AGE       VERSION
    node1     Ready,SchedulingDisabled   49m       v1.6.1+coreos.0
    node2     Ready                      49m       v1.6.1+coreos.0
    node3     Ready                      49m       v1.6.1+coreos.0
  • 查看pod:kubectl get pod --all-namespaces
    NAMESPACE     NAME                                  READY     STATUS    RESTARTS   AGE
    kube-system   kube-apiserver-node1                  1/1       Running   0          49m
    kube-system   kube-controller-manager-node1         1/1       Running   0          49m
    kube-system   kube-dns-69997447-783dz               3/3       Running   0          48m
    kube-system   kube-proxy-node1                      1/1       Running   0          49m
    kube-system   kube-proxy-node2                      1/1       Running   0          49m
    kube-system   kube-proxy-node3                      1/1       Running   0          49m
    kube-system   kube-scheduler-node1                  1/1       Running   0          49m
    kube-system   kubedns-autoscaler-2506230242-1vcgk   1/1       Running   0          48m
    kube-system   nginx-proxy-node2                     1/1       Running   0          48m
    kube-system   nginx-proxy-node3                     1/1       Running   0          49m

6. 源码地址

http://www.wisely.top/2017/07/01/no-problem-kubernetes-kuberspay/

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