ansible的环境配置

准备三台机器：
server.example.com
node1.example.com
node2.example.com
配置IP，主机名，/etc/hosts
然后去配置免密登录
配置yum源使用Centos-stream.repo
安装ansible
使用ansible --version去验证
配置清单：/etc/ansible/hosts
[node]
node1.example.com
node2.example.com
使用ansible node -m ping去验证

1.主机改名

分别将三台机器改名为

server.example.com
node1.example.com
node2.example.com

[root@server ~]# hostnamectl set-hostname server.examle.com

其余两台也用同样方式改名

2 

[root@server ~]# nmcli c modify ens160 ipv4.addresses 192.168.48.100/24 ipv4.gateway 192.168.48.2 ipv4.dns 8.8.8.8 ipv4.method manual
[root@server ~]# nmcli c up ens160

[root@server ~]# nmcli c show ens160 | grep method
ipv4.method:                            manual
ipv6.method:                            auto
proxy.method:                           none

将其改为手动，其余两台也用同样方式
 

3。将三台机器ip映射关系写入（三台同样操作）

[root@server ~]# echo 192.168.30.133  server.example.com >> /etc/hosts
[root@server ~]# echo 192.168.30.137  node1.example.com >> /etc/hosts
[root@server ~]# echo 192.168.30.136  node2.example.com >> /etc/hosts

 配置无密登录

控制主机

[root@server ~]# cd ~/.ssh/
[root@server .ssh]# ls -l
total 12
-rw-------. 1 root root 2610 Jul 24 11:17 id_rsa
-rw-r--r--. 1 root root  580 Jul 24 11:17 id_rsa.pub
-rw-r--r--. 1 root root  704 Aug 20 10:45 known_hosts
[root@server .ssh]# ssh-keygen -t rsa
Generating public/private rsa key pair.
Enter file in which to save the key (/root/.ssh/id_rsa): 
/root/.ssh/id_rsa already exists.
Overwrite (y/n)? y
Enter passphrase (empty for no passphrase): 
Enter same passphrase again: 
Your identification has been saved in /root/.ssh/id_rsa.
Your public key has been saved in /root/.ssh/id_rsa.pub.
The key fingerprint is:
SHA256:7Z5Lr5pjXQ6RjZm2bJupf00c14YkqWcU9phSytta1T0 root@server.examle.com
The key's randomart image is:
+---[RSA 3072]----+
|            +o   |
|         . +++...|
|          +OoooE+|
|         .O++.o =|
|        Soo=o. + |
|         .=o. o  |
|         o+B o   |
|        o+=oo .  |
|       .+=*+.    |
+----[SHA256]-----+
[root@server .ssh]# ls -l
total 12
-rw-------. 1 root root 2610 Aug 20 11:00 id_rsa
-rw-r--r--. 1 root root  576 Aug 20 11:00 id_rsa.pub
-rw-r--r--. 1 root root  704 Aug 20 10:45 known_hosts

[root@server .ssh]# ssh-copy-id root@node1.example.com
/usr/bin/ssh-copy-id: INFO: Source of key(s) to be installed: "/root/.ssh/id_rsa.pub"
The authenticity of host 'node1.example.com (192.168.48.128)' can't be established.
ECDSA key fingerprint is SHA256:xwnutrXDo50urWrwZvTy9MnhkXVrw/OottfsVm2G+gQ.
Are you sure you want to continue connecting (yes/no/[fingerprint])? yes
/usr/bin/ssh-copy-id: INFO: attempting to log in with the new key(s), to filter out any that are already installed
/usr/bin/ssh-copy-id: INFO: 1 key(s) remain to be installed -- if you are prompted now it is to install the new keys
root@node1.example.com's password: 

Number of key(s) added: 1
再检查是否可以免密登录

[root@server ~]# ssh root@node1.example.com 
Activate the web console with: systemctl enable --now cockpit.socket

This system is not registered to Red Hat Insights. See https://cloud.redhat.com/
To register this system, run: insights-client --register

Last login: Sat Aug 20 13:21:39 2022 from 192.168.48.1
[root@node1 ~]# exit
logout
Connection to node1.example.com closed.
[root@server ~]# 
 

安装ansible 

控制主机

[root@server yum.repos.d]# yum install -y https://mirrors.aliyun.com/epel/epel-release-latest-8.noarch.rpm
[root@server yum.repos.d]# yum install ansible -y

[root@server ~]# vim /etc/ansible/ansible.cfg
 

 

[root@server yum.repos.d]# vim /etc/ansible/hosts