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Automation

The document provides a comprehensive guide on installing and using Ansible for automation on various Linux distributions, including CentOS, Rocky Linux, and Ubuntu. It covers the installation process, ad-hoc commands, configuration files, and various Ansible modules for tasks such as managing users, services, and files. Additionally, it includes examples of playbook commands and module usage for common automation tasks.

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gototheschoolcar
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8 views19 pages

Automation

The document provides a comprehensive guide on installing and using Ansible for automation on various Linux distributions, including CentOS, Rocky Linux, and Ubuntu. It covers the installation process, ad-hoc commands, configuration files, and various Ansible modules for tasks such as managing users, services, and files. Additionally, it includes examples of playbook commands and module usage for common automation tasks.

Uploaded by

gototheschoolcar
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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Linux Automation

node1 node2 node3

Network
control

node4 node5
Control Site
●
Installing ansible on Centos,Rockylinux
●
yum install epel-release -y
●
yum install ansible -y
●
Installing ansible on Ubuntu
●
apt-add-repository --yes --update ppa:ansible/ansible-2.9
●
apt install ansible -y
●
ansible –version ( check ansible version)
Ad-Hoc ansible commands
●
Default inventory files path (/etc/ansible/)
●
Config file path (/etc/ansible/ansible.cfg)
●
Create inventory files
●
ansible all -i myhosts --list-hosts (check all group)
●
ansible db -i myhosts --list-hosts (check db group)
●
ansible ungroup -i myhosts --list-hosts (non group host)
Ansible create own config file
●
[defaults]
●
inventory = myhosts
●
remote_user = bozin
●
host_key_checking = false
●
[privilege_escalation]
●
become = true
●
become_method = sudo
●
become_user = root
●
become_ack_pass = false
Ad-hoc command
Ad-hoc command in ansible
●
ansible host_pattern -m module_name -a
“module_option”
●
ansible myhosts -m command -a “uptime”
Ansible module
●
Command (not support pipe | and python
needed)
●
Shell (support pipe and python needed)
●
Raw ( No need python )
Ansible playbook
Playbook format
Ansible playbook command
ansible-playbook playbook_name.xml
●
Ansible modules
●
* copy Module *
●
- name: Ensure MOTD file is in place
●
copy:
●
src: files/motd
●
dest: /etc/motd
●
owner: root
●
group: root
●
mode: 0644
Ansible modules
●
* user modules *
●
- name: Ensure user ricardo exists
●
user:
●
name: ricardo
●
group: users
●
groups: wheel
●
uid: 2001
●
password: "{{ 'mypassword' | password_hash('sha512') }}"
●
state: present
Ansible Modules
●
* package modules *
●
- name: Ensure Apache package is installed
●
package:
●
name: httpd
●
state: present
Ansible modules
●
* service module *
●
- name: Ensure SSHD is started
●
service:
●
name: sshd
●
state: started
Ansible modules
●
* firewall module* for service
●
- name: Ensure port 80 (http) is open
●
firewalld:
●
service: http
●
state: enabled
●
permanent: yes
●
immediate: yes
●
For port
●
- name: Ensure port 3000/TCP is open
●
firewalld:
●
port: 3000/tcp
●
state: enabled
●
permanent: yes
●
immediate: yes
Ansible modules
●
*file module *
●
- name: Ensure directory /app exists
●
file:
●
path: /app
●
state: directory
●
owner: ricardo
●
group: users
●
mode: 0770
●
You can add “recurse : yes” or delete “state : absent”
Ansible Modules
●
* lineinfile module*
●
- name: Ensure host rh8-vm03 in hosts file
●
lineinfile:
●
path: /etc/hosts
●
line: 192.168.122.236 rh8-vm03
●
state: present
●
- name: Ensure root cannot login via ssh
●
lineinfile:
●
path: /etc/ssh/sshd_config
●
regexp: '^PermitRootLogin'
●
line: PermitRootLogin no
●
state: present
Ansible Modules
●
* unarchive module*
●
- name: Extract contents of app.tar.gz
●
unarchive:
●
src: /tmp/app.tar.gz
●
dest: /app
●
remote_src: yes
Ansible modules
●
* command module *
●
- name: Run the app installer
●
command: "/app/install.sh"

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