Ansible job 1

1) install and configure ansible as well as ansible The control node server.example.com as follows ：

2) Create a file called /home/student/ansible/inventory The static inventory file of is as follows ：

[student@server ~]$ mkdir ansible
[student@server ~]$ vim ansible/inventory

[dev]
node1
[test]
node2
[prod]
node1
node2
[balancers]
node1
[webserver:children]
prod
 

2.1)node1 yes dev Members of the host group

2.2)node2 yes test Members of the host group

2.3)node1 and node2 yes prod Members of the host group

2.4)node1 yes balancers A member of the host group

2.5)prod Group is webservers Members of the host group
3). Create a file called /home/student/ansible/ansible.cfg Configuration file for , As shown below ：

[student@server ansible]$ vim ansible.cfg 
 

[defaults]
inventory = ./inventory
remote_user=devops
ask_pass=False
host_key_checking=False
sudo_user=root
roles_path=/home/student/ansible/roles
[privilege_escalation]
become=True
become_method=sudo
become_user=root
become_ask_pass=False
 

[student@server ansible]$ ansible --version
ansible 2.9.27
  config file = /home/student/ansible/ansible.cfg
 

3.1 Host inventory file /home/student/ansible/inventory

3.2 The position of the character in the script is defined as /home/student/ansible/roles

4） Log in to the control host student user ,remote_user = devops, Enable privilege upgrade

[root@node1 ~]# vim /etc/sudoers

devops ALL=(ALL)    NOPASSWD: ALL
[root@node2 ~]# vim /etc/sudoers
devops ALL=(ALL)    NOPASSWD: ALL
 

test ：

[student@server ansible]$ ansible prod -a 'hostname'
node1 | CHANGED | rc=0 >>
node1.example.com
node2 | CHANGED | rc=0 >>
node2.example.com
[student@server ansible]$ ansible prod -a 'useradd m1'
node1 | CHANGED | rc=0 >>

node2 | CHANGED | rc=0 >>