Ansible Playbook for Big Project

  • By
  • February 9, 2022
  • Ansible

Ansible Playbook for Big Project:

In the previous part we wrote a simple playbook to execute various task using yml, now we go on to write a playbook for the big projects. Such as NFS, SAMA & Apache basic as well virtual web hosting with help of playbook on RHEL 8 Server.

In following playbook we use handler, loop and conditions statement so go the small overview.

Handler:

Handlers are just like a regular tasks in an ansible playbook, but are only run if the task contains a notify directive and also indicate that it change something

 

eg.

 name: test

 hosts: pune

 remote_user: root

 tasks:

– name: install httpd package

  yum:

name: httpd

state: present

  notify: restart httpd

  handlers:

– name: restart httpd

    service:

name: httpd

state: restarted

:wq

 

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Loop:

When we need to repeat and execute any task in multiple time, means we want to run task in looping as per computer programing concept. Here we creating multiple users with the user module, and repeating a polling step until certain result is reached.

 

 name: loop

 hosts: pune

 remote_user: root

 tasks:

– name: create users 

  user:

name: ‘{{ item }}’

state: present

    with_items:

– suraj

– ajay

– akash

– sara

Conditions:

Whenever we have different different scenarios, we put conditions according to the scenario.

 

name: conditiontest

hosts: pune 

remote_user: root

tasks:

  – name: install apache on debian

  command: apt-get -y install apache2

  when: ansible_os_family == “Debian”

–  name: install apache for redhat

    command:  yum  install   httpd  -y

    when: ansible_os_family == “RedHat”

1.Playbook for NFS Configuration:

 name: nfspro

 hosts: client

 remote_user: root

 tasks:

         – name: Transfter repo file on all clients

           copy:

                   src: /etc/yum.repos.d/server.repo

                   dest: /etc/yum.repos.d/

         – name: Install nfs package

           yum:

                   name: nfs*

                   state: present

         – name: Start service nfs-server

           service:

                   name: nfs-server

                   state: started

         – name: Enable nfs-server 

           service:

                   name: nfs-server

                   enabled: yes

         – name: create directory to share

           file:

                   path: /india

                   state: directory

                   owner: root

                   group: root

                   mode: ‘0777’

         – name: create file to share

           file:

                   path: /india/notes.txt

                   state: touch

         – name: Edit configuration file

           lineinfile:

                   path: /etc/exports

                   line: /india 172.25.0.0/24(rw)

         – name: add service into firewall

           firewalld:

                   service: nfs

                   permanent: yes

                   state: enabled

         – name: Reload firewall service

           service:

                   name: firewalld

                   state: restarted

         – name: Restart nfs service

           service:

                   name: nfs-server

                   state: restarted

 

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2.Playbook for Samba Configuration:

 name: sambaconfig

 hosts: pune

 remote_user: root

 vars:

         package:

                 – samba

                 – samba-common

                 – samba-client

         service:

                 – smb

                 – nmb

 tasks:

         – name: transfer repo

           copy:

                   src: /etc/yum.repos.d/server.repo

                   dest: /etc/yum.repos.d/

         – name: install package

           yum:

                   name: ‘{{ package }}’

                   state: present

         – name: start enable smb service

           service:

                   name: ‘{{ service[0] }}’

                   state: started

                   enabled: yes

         – name: start enable nmb service

           service:

                   name: ‘{{ service[1] }}’

                   state: started

                   enabled: yes

         – name: add service into firewall

           firewalld:

                   service: samba

                   permanent: yes

                   state: enabled

         – name: restart firewalld service

           service:

                   name: firewalld

                   state: restarted

         – name: create directory to share

           file:

                   path: /sambadir

                   state: directory

                   owner: root

                   group: root

                   mode: ‘0755’

         – name: create file to share

           file:

                   path: /sambadir/note.txt

                   state: touch

         – name: set selinux permission

           community.general.sefcontext:

                   target: “/sambadir(/.*)?”

                   setype: samba_share_t

                   state: present

         – name: restore selinux context

           ansible.builtin.command: restorecon -rv /sambadir

         – name: restore selinux context

           ansible.builtin.command: restorecon -rv /sambadir/note.txt

         – name: configure selinux file

           blockinfile:

                  path: /etc/samba/smb.conf

                   block: |

                           [share]

                           comment=samba using ansible

                           path=/sambadir

                           browseable=yes

                           valid users=ajay

                           read only=yes

                           hosts allow=172.25.0.

         – name: useradd ajay

           user:

                   name: ajay

                   comment: sambauser

         – name: create samba user password

           shell: echo -e “123\n123” | smbpasswd -a -s ajay

         – name: start enable smb service

           service:

                   name: ‘{{ service[0] }}’

                   state: restarted

                   enabled: yes

         – name: start enable nmb service

           service:

                   name: ‘{{ service[1] }}’

                   state: restarted

                   enabled: yes

3.Playbook for Samba Configuration:

 name: webhosting

 hosts: pune

 become: yes

 vars:

         pkg: httpd

         srv: http

 tasks:

         – name: transfer repo file

           copy:

                   src: /etc/yum.repos.d/server.repo

                   dest: /etc/yum.repos.d/

         – name: install httpd package

           yum:

                   name: ‘{{ pkg }}’

                   state: present

           notify: enable httpd

         – name: start httpd service

           service:

                   name: ‘{{ pkg }}’

                   state: started

         – name: create file for webpage

           file:

                   path: /var/www/html/index.html

                   state: touch

                   owner: root

                   group: root

                   mode: ‘0644’

         – name: write webpage code in index file

           blockinfile:

                   path: /var/www/html/index.html

                   block: |

                           <html>

                           <head>

                           <title>Ansible</title>

                           </head>

                           <body bgcolor=skyblue>

                           <h1>Welcome to ansible automation website</h1>

                           </body>

                           </html>

         – name: restart httpd service

           service:

                   name: ‘{{ pkg }}’

                   state: restarted

         – name: add service into firewall

           firewalld:

                   service: ‘{{ srv }}’

                   immediate: true

                   permanent: true

                   state: enabled 

         – name: restart firewall service

           service:

                   name: firewalld

                   state: restarted

         – name: create second webpage

           file:

                   path: /var/www/html/pune

                   state: directory

                   owner: root

                   group: root

                   mode: ‘0755’

         – name: create file for second webpage

           file:

                   path: /var/www/html/pune/index.html

                   state: touch

                   owner: root

                   group: root

                   mode: ‘0644’

         – name: write webpage code in second index file

           blockinfile:

                   path: /var/www/html/pune/index.html

                   block: |

                           <html>

                           <head>

                           <title>Ansible 2</title>

                           </head>

                           <body bgcolor=gray>

                           <h1>Welcome to ansible automation 2nd  website</h1>

                           </body>

                           </html>

         – name: restart httpd service

           service:

                   name: ‘{{ pkg }}’

                   state: restarted

         – name: create directory for virtual web hosting

           file:

                   path: /usr/mumbai

                   state: directory

                   owner: root

                   group: root

                   mode: ‘0755’

         – name: create file for virtual webpage

           file:

                   path: /usr/mumbai/index.html

                   state: touch

                   owner: root

                   group: root

                   mode: ‘0644’

         – name: write webpage code in second index file

           blockinfile:

                   path: /usr/mumbai/index.html

                   block: |

                           <html>

                           <head>

                           <title>Virtual</title>

                           </head>

                           <body bgcolor=yellow>

                           <h1>Welcome to ansible virtual website</h1>

                           </body>

                           </html>

         – name: transfer web configuration file for server

           copy:

                   src: /etc/ansible/server.conf

                   dest: /etc/httpd/conf.d/

                   owner: root

                   group: root

                   mode: ‘0644’

         – name: transfer web configuration file for mumbai

           copy:

                   src: /etc/ansible/mumbai.conf

                   dest: /etc/httpd/conf.d/

                   owner: root

                   group: root

         – name: add entry in host file for server

           lineinfile:

                   path: /etc/hosts

                   line: 192.168.29.125 server.example.com

         – name: add entry in host file for mumbai

           lineinfile:

                   path: /etc/hosts

                   line: 192.168.29.125 mumbai.example.com

         – name: create virtual web hosting for nagar website

           file:

                   path: /nagar

                   state: directory

                   owner: root

                   group: root

                   mode: ‘0755’

         – name: create file for virtual webpage

           file:

                   path: /nagar/index.html

                   state: touch

                   owner: root

                   group: root

                   mode: ‘0644’

         – name: write webpage code in second index file

           blockinfile:

                   path: /nagar/index.html

                   block: |

                           <html>

                           <head>

                           <title>Virtual</title>

                           </head>

                           <body bgcolor=pink>

                           <h1>Welcome to ansible virtual website</h1>

                           </body>

                           </html>

         – name: transfer web configuration file for nagar

           copy:

                   src: /etc/ansible/nagar.conf

                   dest: /etc/httpd/conf.d/

                   owner: root

                   group: root

         – name: add entry in host file for mumbai

           lineinfile:

                   path: /etc/hosts

                   line: 192.168.29.125 nagar.example.com

         – name: set selinux lable

           community.general.sefcontext:

                   target: “/nagar(/.*)?”

                   setype: httpd_sys_content_t

                   state: present

         – name: restor selinux label for nagar

           ansible.builtin.command: restorecon -irv /nagar

         – name: restor selinux label for index file

           ansible.builtin.command: restorecon -irv /nagar/index.html

         – name: restart httpd service

           service:

                   name: ‘{{ pkg }}’

                   state: restarted

 handlers:

         – name: enable httpd

           service:

                   name: ‘{{ pkg }}’

                   enabled: yes

 

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Author:-

Abhijeet Dahatonde

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