ansible installation in centos 7 | ansible tutorial in hindi

ansible installation in centos 7 | ansible tutorial in hindi


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Ansible is a free, powerful, open source automation tool for configuring, managing and deploying software applications on the nodes by using SSH.

Ansible run without agent in remote host it just required ssh connection and python ( 2.4 or higher )on all nodes.

Ansible Host 

OS                   - CentOS 7
Kernel            - 3.10.0-693.17.1.el7.x86_64
IP                    - 172.17.20.100
Hostname      - linuxtopic.com


Prerequisite 

Install Require Packages
yum install PyYAML sshpass python-httplib2 python-jinja2 epel*
Install Ansible using following command.
yum install ansible -y


To verify the ansible version
ansible --version


Ansible default structure
  • ansible.cfg
  • hosts
  • roles
ls /etc/ansible


ansible.cfg :  Main Configuration File
vi /etc/ansible/ansible.cfg
Check following points  and  uncomment if you want to change default settings

#inventory = /etc/ansible/hosts

#library = /usr/share/my_modules/

#module_utils = /usr/share/my_module_utils/

#remote_tmp = ~/.ansible/tmp

#local_tmp = ~/.ansible/tmp

#plugin_filters_cfg = /etc/ansible/plugin_filters.yml

#forks = 5

#poll_interval = 15

#sudo_user = root

#ask_sudo_pass = True

#ask_pass = True

#transport = smart

#remote_port = 22

#module_lang = C

#module_set_locale = False

# uncomment this to disable SSH key host checking

host_key_checking = False

# additional paths to search for roles in, colon separated

#roles_path = /etc/ansible/roles

# SSH timeout

#timeout = 10

# default user to use for playbooks if user is not specified

# (/usr/bin/ansible will use current user as default)

#remote_user = root

# logging is off by default unless this path is defined

# if so defined, consider logrotate

#log_path = /var/log/ansible.log

# if set, always use this private key file for authentication, same as

# if passing --private-key to ansible or ansible-playbook

#private_key_file = /path/to/file

# If set, configures the path to the Vault password file as an alternative to

# specifying --vault-password-file on the command line.

#vault_password_file = /path/to/vault_password_file

#system_warnings = True

#deprecation_warnings = True


Roles

ansible roles are the collections of variables, tasks, files, templates, and modules. each role has a directory tree in itself and locate in /roles directory.
ansible-galaxy -h


ansible-galaxy [delete|import|info|init|install|list|login|remove|search|setup] [--help] [options]

To Create a roles directory
cd /etc/ansible/rolesansible-galaxy init linuxtopic
ls linuxtopic



Hosts 

This is Inventory file where we add entry of hosts matching.
vi /etc/hosts
# localhost
[localhost]
127.0.0.1

Note: here "[localhost]" hosts group name and "127.0.0.1” is hosts of group


To verify localhost connectivity using ping module 
ansible localhost -m ping
Here “ansible” is command “localhost” is groupname ( we can also use separate ip of host like 127.0.0.1 ) “-m ping” -m module option and “ping” is module name


Video Tutorial 



Thanks

End of this ansble installation part in CentOS 7, we need your support so i request you to please comment, share and like this post


www.linuxtopic.com

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