AI摘要

本文详细介绍了使用ezdown脚本一键部署Kubernetes集群的步骤。首先，需完成环境准备，包括配置主机信息、SSH免密登录、禁用交换分区和防火墙。接着，下载并执行ezdown脚本，启动kubeasz容器，并创建新的集群配置。用户需修改集群的hosts文件，定义etcd、master和node节点。最后，通过一条命令即可自动化完成整个Kubernetes集群的安装部署。

此内容根据文章生成，仅用于文章内容的解释与总结

Kubernetes集群ezdown脚本一键部署

1.环境准备

• 主机信息

• 配置hosts解析

10.107.24.81 node1
10.107.24.82 node2
10.107.24.83 master

• 生成SSH身份文件

ssh-keygen
一路回车

• 配置免密登入

ssh-copy-id -i node1
ssh-copy-id -i node2
ssh-copy-id -i master

• 测试免密登入

ssh master
ssh node1
ssh node2

• 禁用交换分区

swapoff -a
sed -i.bak '/swap/s/^/#/' /etc/fstab

• 关闭防火墙

systemctl stop firewalld && systemctl disable firewalld

• 安装git和wget

yum install -y git wget

2.脚本安装Kubernetes

• 下载ezdown

[root@master ~]# wget https://github.com/easzlab/kubeasz/releases/download/3.5.2/ezdown
[root@master ~]# chmod +x ezdown

• 下载所需文件

# 国内
[root@master ~]# ./ezdown -D
# 国外
[root@master ~]# ./ezdown -D -m standard

2023-03-19 14:19:49 INFO Action successed: download_all

• 创建集群配置

[root@master ~]# ./ezdown -S

2023-03-19 14:20:13 INFO Action begin: start_kubeasz_docker
2023-03-19 14:20:13 INFO try to run kubeasz in a container
2023-03-19 14:20:13 DEBUG get host IP: 10.107.24.83
fc0377122adc8726397e25b6f0285e04072e6b76b9f6b9bd1a0dca3b17d6e1a2
2023-03-19 14:20:14 INFO Action successed: start_kubeasz_docker

• 创建新的集群

[root@master ~]# docker exec -it kubeasz ezctl new k8s

2023-03-19 06:21:22 DEBUG generate custom cluster files in /etc/kubeasz/clusters/k8s
2023-03-19 06:21:22 DEBUG set versions
2023-03-19 06:21:22 DEBUG cluster k8s: files successfully created.
2023-03-19 06:21:22 INFO next steps 1: to config '/etc/kubeasz/clusters/k8s/hosts'
2023-03-19 06:21:22 INFO next steps 2: to config '/etc/kubeasz/clusters/k8s/config.yml'

• 修改新的集群配置文件

[root@master ~]# vim /etc/kubeasz/clusters/k8s/hosts

# 'etcd' cluster should have odd member(s) (1,3,5,...)
[etcd]
10.107.24.83

# master node(s), set unique 'k8s_nodename' for each node
# CAUTION: 'k8s_nodename' must consist of lower case alphanumeric characters, '-' or '.',
# and must start and end with an alphanumeric character
[kube_master]
10.107.24.83 k8s_nodename='master'

# work node(s), set unique 'k8s_nodename' for each node
# CAUTION: 'k8s_nodename' must consist of lower case alphanumeric characters, '-' or '.',
# and must start and end with an alphanumeric character
[kube_node]
10.107.24.81 k8s_nodename='node1'
10.107.24.82 k8s_nodename='node2'

• 一键安装

docker exec -it kubeasz ezctl setup k8s all

PLAY RECAP *****************************************************************************************************
10.107.24.81               : ok=76   changed=73   unreachable=0    failed=0    skipped=129  rescued=0    ignored=1   
10.107.24.82               : ok=76   changed=73   unreachable=0    failed=0    skipped=129  rescued=0    ignored=1   
10.107.24.83               : ok=113  changed=105  unreachable=0    failed=0    skipped=152  rescued=0    ignored=1   
localhost                  : ok=43   changed=40   unreachable=0    failed=0    skipped=42   rescued=0    ignored=0