请读者务必保持环境一致
安装过程中需要下载所需系统包，请务必使所有节点连上互联网。
本次安装的集群节点信息
实验环境：VMware的虚拟机
| IP地址 | 主机名 | CPU | 内存 |
|---|---|---|---|
| 192.168.77.133 | k8s-m1 | 6核 | 6G |
| 192.168.77.134 | k8s-m2 | 6核 | 6G |
| 192.168.77.135 | k8s-m3 | 6核 | 6G |
| 192.168.77.136 | k8s-n1 | 6核 | 6G |
| 192.168.77.137 | k8s-n2 | 6核 | 6G |
| 192.168.77.138 | k8s-n3 | 6核 | 6G |
另外由所有 master节点提供一组VIP 192.168.77.140。
本次安装的集群拓扑图
image.png
本次使用到的ROLE
- Ansible Role 系统环境 之【epel源设置】
- Ansible Role 系统环境 之【hostnames】
- Ansible Role 容器 之【docker】
- Ansible Role 容器 之【kubernetes】
ansible role怎么用请看下面文章
集群安装方式
以static pod方式安装kubernetes ha高可用集群。
Ansible管理节点操作
OS： CentOS Linux release 7.4.1708 (Core)
ansible: 2.5.3
安装Ansible
# yum -y install ansible
# ansible --version
ansible 2.5.3
config file = /etc/ansible/ansible.cfg
configured module search path = [u'/root/.ansible/plugins/modules', u'/usr/share/ansible/plugins/modules']
ansible python module location = /usr/lib/python2.7/site-packages/ansible
executable location = /usr/bin/ansible
python version = 2.7.5 (default, Aug 4 2017, 00:39:18) [GCC 4.8.5 20150623 (Red Hat 4.8.5-16)]
配置ansible
# sed -i 's|#host_key_checking|host_key_checking|g' /etc/ansible/ansible.cfg
下载role
# yum -y install git
# git clone https://github.com/kuailemy123/Ansible-roles.git /etc/ansible/roles
正克隆到 '/etc/ansible/roles'...
remote: Counting objects: 1767, done.
remote: Compressing objects: 100% (20/20), done.
remote: Total 1767 (delta 5), reused 24 (delta 4), pack-reused 1738
接收对象中: 100% (1767/1767), 427.96 KiB | 277.00 KiB/s, done.
处理 delta 中: 100% (639/639), done.
下载kubernetes-files.zip文件
这是为了适应国情，导出所需的谷歌docker image，方便大家使用。
文件下载链接：https://pan.baidu.com/s/1BNMJLEVzCE8pvegtT7xjyQ 密码：qm4k
# yum -y install unzip
# unzip kubernetes-files.zip -d /etc/ansible/roles/kubernetes/files/
配置主机信息
# cat /etc/ansible/hosts
[k8s-master]
192.168.77.133
192.168.77.134
192.168.77.135
[k8s-node]
192.168.77.136
192.168.77.137
192.168.77.138
[k8s-cluster:children]
k8s-master
k8s-node
[k8s-cluster:vars]
ansible_ssh_pass=123456
k8s-master组为所有的master节点主机。k8s-node组为所有的node节点主机。k8s-cluster包含k8s-master和k8s-node组的所有主机。
请注意, 主机名称请用小写字母, 大写字母会出现找不到主机的问题。
配置playbook
# cat /etc/ansible/k8s.yml
---
# 初始化集群
- hosts: k8s-cluster
serial: "100%"
any_errors_fatal: true
vars:
- ipnames:
'192.168.77.133': 'k8s-m1'
'192.168.77.134': 'k8s-m2'
'192.168.77.135': 'k8s-m3'
'192.168.77.136': 'k8s-n1'
'192.168.77.137': 'k8s-n2'
'192.168.77.138': 'k8s-n3'
roles:
- hostnames
- repo-epel
- docker
# 安装master节点
- hosts: k8s-master
any_errors_fatal: true
vars:
- kubernetes_master: true
- kubernetes_apiserver_vip: 192.168.77.140
roles:
- kubernetes
# 安装node节点
- hosts: k8s-node
any_errors_fatal: true
vars:
- kubernetes_node: true
- kubernetes_apiserver_vip: 192.168.77.140
roles:
- kubernetes
# 安装addons应用
- hosts: k8s-master
any_errors_fatal: true
vars:
- kubernetes_addons: true
- kubernetes_ingress_controller: nginx
- kubernetes_apiserver_vip: 192.168.77.140
roles:
- kubernetes
kubernetes_ingress_controller 还可以选择
traefik
执行playbook
# ansible-playbook /etc/ansible/k8s.yml
......
real 26m44.153s
user 1m53.698s
sys 0m55.509s
验证集群版本
# kubectl version
Client Version: version.Info{Major:"1", Minor:"10", GitVersion:"v1.10.3", GitCommit:"2bba0127d85d5a46ab4b778548be28623b32d0b0", GitTreeState:"clean", BuildDate:"2018-05-21T09:17:39Z", GoVersion:"go1.9.3", Compiler:"gc", Platform:"linux/amd64"}
Server Version: version.Info{Major:"1", Minor:"10", GitVersion:"v1.10.3", GitCommit:"2bba0127d85d5a46ab4b778548be28623b32d0b0", GitTreeState:"clean", BuildDate:"2018-05-21T09:05:37Z", GoVersion:"go1.9.3", Compiler:"gc", Platform:"linux/amd64"}
验证集群状态
kubectl -n kube-system get po -o wide -l k8s-app=kube-proxy
kubectl -n kube-system get po -l k8s-app=kube-dns
kubectl -n kube-system get po -l k8s-app=calico-node -o wide
calicoctl node status
kubectl -n kube-system get po,svc -l k8s-app=kubernetes-dashboard
kubectl -n kube-system get po,svc | grep -E 'monitoring|heapster|influxdb'
kubectl -n ingress-nginx get pods
kubectl -n kube-system get po -l app=helm
kubectl -n kube-system logs -f kube-scheduler-k8s-m2
helm version
这里就不写结果了。
查看addons访问信息
在第一台master服务器上
kubectl cluster-info
Kubernetes master is running at https://192.168.77.140:6443
Elasticsearch is running at https://192.168.77.140:6443/api/v1/namespaces/kube-system/services/elasticsearch-logging/proxy
heapster is running at https://192.168.77.140:6443/api/v1/namespaces/kube-system/services/heapster/proxy
Kibana is running at https://192.168.77.140:6443/api/v1/namespaces/kube-system/services/kibana-logging/proxy
kube-dns is running at https://192.168.77.140:6443/api/v1/namespaces/kube-system/services/kube-dns:dns/proxy
monitoring-grafana is running at https://192.168.77.140:6443/api/v1/namespaces/kube-system/services/monitoring-grafana/proxy
monitoring-influxdb is running at https://192.168.77.140:6443/api/v1/namespaces/kube-system/services/monitoring-influxdb:http/proxy
# cat ~/k8s_addons_access
集群部署完成后，建议重启集群所有节点。
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