RHCE-ansible

1)安装和配置ansible以及ansible控制节点server.example.com如下：

2)创建一个名为/home/student/ansible/inventory的静态库存文件如下所示：

2.1)node1 是dev主机组的成员

2.2)node2是test主机组的成员

2.3)node1和node2是prod主机组的成员

2.4)node1是balancers主机组的一员

2.5)prod组是webservers主机组的成员

3).创建一个名为/home/student/ansible/ansible.cfg的配置文件，如下所示：

3.1主机库存文件/home/student/ansible/inventory

3.2剧本中角色的位置被定义为/home/student/ansible/roles

4）控制主机中登录student用户,remote_user = devops,开启特权升级

在Server主机安装ansible，并写入host文件
（安装前必须确认是否有python模块）

[root@server ztx]# yum install ansible 

server

node1

node2

在控制添加用户student

[root@server ztx]# useradd student
[student@server ~]$ mkdir ansible
[student@server ~]$ cd ansible/
[student@server ansible]$ vim inventory

[student@server ansible]$ vim ansible.cfg 

查看能否看到配置文件

[student@server ansible]$ ansible --version

更改信息

添加用户devops

[root@node1 admin]# [root@node1 admin]# passwd devops
Changing password for user devops.
New password: 
Retype new password: 
passwd: all authentication tokens updated successfully.
useradd devops

[root@node2 ztx]# useradd devops
[root@node2 ztx]# passwd devops
Changing password for user devops.
New password: 
Retype new password: 
passwd: all authentication tokens updated successfully.

实现免密登录

[student@server ansible]$ ssh-keygen  -t rsa -f  ~/.ssh/id_rsa -P "" -q
[student@server ansible]$ ssh-copy-id  -i ~/.ssh/id_rsa.pub  devops@node1
/usr/bin/ssh-copy-id: INFO: Source of key(s) to be installed: "/home/student/.ssh/id_rsa.pub"
/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
devops@node1's password: Number of key(s) added: 1 Now try logging into the machine, with: "ssh 'devops@node1'" and check to make sure that only the key(s) you wanted were added. [student@server ansible]$ ssh-copy-id -i ~/.ssh/id_rsa.pub devops@node2 /usr/bin/ssh-copy-id: INFO: Source of key(s) to be installed: "/home/student/.ssh/id_rsa.pub" The authenticity of host 'node2 (172.25.250.12)' can't be established.
ECDSA key fingerprint is SHA256:Kl2g1gJ/9cWTXV1FmBR/dPdcCIcd+GVoFLxMuNxGQ7Y.
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
devops@node2's password: Number of key(s) added: 1 Now try logging into the machine, with: "ssh 'devops@node2'"
and check to make sure that only the key(s) you wanted were added.

测试免密登录