This scenario shows:
- how to manage services
- You should have a look following lab, nodes that are created in that LAB, are using in ansible commands
- Update site.yml file, Add followings:
- name: start apache (Ubuntu)
tags: ubuntu,apache,apache2
service:
name: apache2
state: started
enabled: yes
when: ansible_distribution == "Ubuntu"
- Updated site.yml
---
- hosts: all
become: true
pre_tasks:
- name: install updates (CentOS)
tags: always
dnf:
update_only: yes
update_cache: yes
when: ansible_distribution == "CentOS"
- name: install updates (Ubuntu)
tags: always
apt:
upgrade: dist
update_cache: yes
when: ansible_distribution == "Ubuntu"
- hosts: web_servers
become: true
tasks:
- name: install apache and php (CentOS)
tags: centos,apache,httpd
dnf:
name:
- httpd
- php
state: latest
when: ansible_distribution == "CentOS"
- name: install apache and php (Ubuntu)
tags: ubuntu,apache,apache2
apt:
name:
- apache2
- libapache2-mod-php
state: latest
when: ansible_distribution == "Ubuntu"
- name: start apache (Ubuntu)
tags: ubuntu,apache,apache2
service:
name: apache2
state: started
enabled: yes
when: ansible_distribution == "Ubuntu"
- name: copy default (index) html file for site
tags: apache,apache2,httpd
copy:
src: default_site.html
dest: /var/www/html/index.html
owner: root
group: root
mode: 0644
- name: install unzip
package:
name: unzip
- name: install terraform
unarchive:
src: https://releases.hashicorp.com/terraform/1.3.4/terraform_1.3.4_linux_amd64.zip
dest: /usr/local/bin
remote_src: yes
owner: root
group: root
mode: 0755
- hosts: database_servers
become: true
tasks:
- name: install MariaDB (CentOS)
tags: centos,db,mariadb
dnf:
name: mariadb
state: latest
when: ansible_distribution == "CentOS"
- name: install MariaDB (Ubuntu)
tags: ubuntu,db,mariadb-server
apt:
name: mariadb-server
state: latest
when: ansible_distribution == "Ubuntu"
- Stop apache2 service and see the service is stopped.
systemctl stop apache2
systemctl status apache2
- Run
ansible-playbook --ask-become-pass site.yml
- It is seen that apache2 service is started:
- Go to node1 and run:
sudo nano /etc/apache2/sites-available/000-default.conf
- Add following tasks into the webserver side of site.yml.
- name: change email address for admin (Ubuntu)
tags: ubuntu,apache,apache2
lineinfile:
path: /etc/apache2/sites-available/000-default.conf
regexp: '^ServerAdmin'
line: ServerAdmin [email protected]
when: ansible_distribution == "Ubuntu"
register: apache2_service
- name: restart apache (Ubuntu)
tags: ubuntu,apache,apache2
service:
name: apache2
state: restarted
when: apache2_service.changed
- As can seen printscreen, when the keyword is written in the register part (apache2_service), is changed, restart service is restarted. The task depends on the registered variable status.
- IMPORTANT: If the register variable is defined consecutively, if second task does not run with same register variable (because first same task handled it), because second one does not change, so restart task does not run.
- Updated site.yml:
---
- hosts: all
become: true
pre_tasks:
- name: install updates (CentOS)
tags: always
dnf:
update_only: yes
update_cache: yes
when: ansible_distribution == "CentOS"
- name: install updates (Ubuntu)
tags: always
apt:
upgrade: dist
update_cache: yes
when: ansible_distribution == "Ubuntu"
- hosts: web_servers
become: true
tasks:
- name: install apache and php (CentOS)
tags: centos,apache,httpd
dnf:
name:
- httpd
- php
state: latest
when: ansible_distribution == "CentOS"
- name: install apache and php (Ubuntu)
tags: ubuntu,apache,apache2
apt:
name:
- apache2
- libapache2-mod-php
state: latest
when: ansible_distribution == "Ubuntu"
- name: start apache (Ubuntu)
tags: ubuntu,apache,apache2
service:
name: apache2
state: started
enabled: yes
when: ansible_distribution == "Ubuntu"
- name: change email address for admin (Ubuntu)
tags: ubuntu,apache,apache2
lineinfile:
path: /etc/apache2/sites-available/000-default.conf
regexp: 'ServerAdmin webmaster@localhost'
line: ' ServerAdmin [email protected]'
when: ansible_distribution == "Ubuntu"
register: apache2_service
- name: restart apache (Ubuntu)
tags: ubuntu,apache,apache2
service:
name: apache2
state: restarted
when: apache2_service.changed
- name: copy default (index) html file for site
tags: apache,apache2,httpd
copy:
src: default_site.html
dest: /var/www/html/index.html
owner: root
group: root
mode: 0644
- name: install unzip
package:
name: unzip
- name: install terraform
unarchive:
src: https://releases.hashicorp.com/terraform/1.3.4/terraform_1.3.4_linux_amd64.zip
dest: /usr/local/bin
remote_src: yes
owner: root
group: root
mode: 0755
- hosts: database_servers
become: true
tasks:
- name: install MariaDB (CentOS)
tags: centos,db,mariadb
dnf:
name: mariadb
state: latest
when: ansible_distribution == "CentOS"
- name: install MariaDB (Ubuntu)
tags: ubuntu,db,mariadb-server
apt:
name: mariadb-server
state: latest
when: ansible_distribution == "Ubuntu"
- It can be seen that it is changed:
