[root@serverb ~]# hostnamectl set-hostname servera [root@serverb ~]# su - Last login: Sat Nov 27 21:32:10 CST 2021 on pts/1 [root@servera ~]# [root@localhost ~]# hostnamectl set-hostname serverb [root@localhost ~]# su - Last login: Sat Nov 27 21:33:21 CST 2021 from 192.168.159.1 on pts/0 [root@serverb ~]# [root@localhost ~]# hostnamectl set-hostname serverc [root@localhost ~]# su - Last login: Sat Nov 27 21:07:03 CST 2021 from 192.168.159.1 on pts/0 [root@serverc ~]# [root@localhost ~]# hostnamectl set-hostname serverd [root@localhost ~]# su - Last login: Sat Nov 27 21:07:00 CST 2021 from 192.168.159.1 on pts/0 [root@serverd ~]#点击xshell的工具中的 “发送键到所有会话” 可实现批量操作 添加标签实现 配置epel扩展源
[root@servera ~]# wget -O /etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-7.repo批量操作配置hosts解析
[root@servera ~]# vim + /etc/hosts [root@servera ~]# cat /etc/hosts 127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4 ::1 localhost localhost.localdomain localhost6 localhost6.localdomain6 192.168.159.130 servera 192.168.159.131 serverb 192.168.159.132 serverc 192.168.159.133 serverdservera以root用户配置到所有机器免密钥互信（再次点击xshell工具中“发送键到所有会话”实现关闭）
[root@servera ~]# ssh-keygen -f ~/.ssh/id_rsa -P '' -q [root@servera ~]# ls ~/.ssh id_rsa id_rsa.pub分发到所有节点（for循环的方式）
[root@servera ~]# for i in server{a..d}
> do
> ssh-copy-id $i
> done
验证是否分发到所有节点
[root@servera ~]# for i in server{a..d}
> do
> ssh $i hostname
> done
servera
serverb
serverc
serverd
安装所需的软件包（ansible）
[root@servera ~]# yum install ansible -y创建清单inventory文件/home/student/ansible/inventory，要求如下：
servera属于dev主机组
serverb属于test和balancers主机组
serverc和serverd属于prod主机组
prod主机组属于webservers主机组
创建ansible目录
[root@servera ansible]# cp /etc/ansible/ansible.cfg .
[root@servera ansible]# vim inventory [root@servera ansible]# cat inventory [dev] servera [test] serverb [balancers] serverb [prod] serverc serverd [webservers:children] prod创建ansible配置文件/home/student/ansible/ansible.cfg，要求如下：
使用/home/ansible/inventory清单文件
角色存放在/home/ansible/roles/ 目录
[root@servera ansible]# touch inventory [root@servera ansible]# mkdir roles
修改配置文件
[root@servera ansible]# vim ansible.cfg 修改如下： inventory = /root/ansible/inventory roles_path = /root/ansible/roles host_key_checking = False测试
[root@servera ansible]# ansible-inventory --graph
@all:
|--@balancers:
| |--serverb
|--@dev:
| |--servera
|--@test:
| |--serverb
|--@ungrouped:
|--@webservers:
| |--@prod:
| | |--serverc
| | |--serverd
[root@servera ansible]# ansible all -m ping -o
servera | SUCCESS => {"ansible_facts": {"discovered_interpreter_python": "/usr/bin/python"}, "changed": false, "ping": "pong"}
serverb | SUCCESS => {"ansible_facts": {"discovered_interpreter_python": "/usr/bin/python"}, "changed": false, "ping": "pong"}
serverc | SUCCESS => {"ansible_facts": {"discovered_interpreter_python": "/usr/bin/python"}, "changed": false, "ping": "pong"}
serverd | SUCCESS => {"ansible_facts": {"discovered_interpreter_python": "/usr/bin/python"}, "changed": false, "ping": "pong"}
二、创建一个 shell 脚本名为 adhoc.sh 用以运行 ad-hoc 命令 。为每个受控节点配罝 yum仓库。要求如下：
仓库1 ：
Name: RH294_base
Description： RH294 base software
base url: http://content.example.com/rhel8.0/x86_64/dvd/baseOS
需要验证钦件包 GPG 签名
GPG key 在： /etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-release
启用此软件仓库
仓库 2:
Name: RH294_Stream
Description ： RH294 stream software
base url： http://content.example.com/rhel8.0/x86_64/dvd/AppStream
需要验证软件包 GPG 签名
GPG key 在： /etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-release
启用此软件仓库
[root@servera ansible]# vim adhoc.sh
[root@servera ansible]# cat adhoc.sh
#!/bin/bash
ansible dev -m yum_repository -a 'name=RH294_base description="RH249 base software"
base url=http://content.example.com/rhel8.0/x86_64/dvd/baseOS
gpgcheck=yes gpgkey=/etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-release
enabled=yes'
ansible dev -m yum_repository -a 'name= RH294_Stream description=" RH294 stream software"
base url=http://content.example.com/rhel8.0/x86_64/dvd/AppStream
gpgcheck=yes gpgkey=/etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-release
enabled=yes'
[root@servera ansible]# chmod +x adhoc.sh
[root@servera ansible]# ./adhoc.sh
