update file for adding lab

lamp_ubuntu2204_2hosts_withroles/README.md

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+Building a simple LAMP stack and deploying Application using Ansible Playbooks.
+-------------------------------------------
+
+These playbooks require Ansible 1.2.
+
+These playbooks are meant to be a reference and starter's guide to building
+Ansible Playbooks. These playbooks were tested on CentOS 6.x so we recommend
+that you use CentOS or RHEL to test these modules.
+
+This LAMP stack can be on a single node or multiple nodes. The inventory file
+'hosts' defines the nodes in which the stacks should be configured.
+
+        [webservers]
+        localhost
+
+        [dbservers]
+        bensible
+
+Here the webserver would be configured on the local host and the dbserver on a
+server called `bensible`. The stack can be deployed using the following
+command:
+
+        ansible-playbook -i hosts site.yml
+
+Once done, you can check the results by browsing to http://localhost/index.php.
+You should see a simple test page and a list of databases retrieved from the
+database server.

lamp_ubuntu2204_2hosts_withroles/group_vars/all

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+---
+# Variables listed here are applicable to all host groups
+
+httpd_port: 80
+ntpserver: 192.168.1.2
+repository: https://github.com/barais/mywebapp.git

lamp_ubuntu2204_2hosts_withroles/group_vars/dbservers

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+---
+# The variables file used by the playbooks in the dbservers group.
+# These don't have to be explicitly imported by vars_files: they are autopopulated.
+
+mysqlservice: mysqld
+mysql_port: 3306
+dbuser: foouser
+dbname: foodb
+upassword: abc
+mysql_root_password: root

lamp_ubuntu2204_2hosts_withroles/group_vars/webservers

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+---
+# The variables file used by the playbooks in the dbservers group.
+# These don't have to be explicitly imported by vars_files: they are autopopulated.
+
+databasepublicip: 192.168.56.142
+publicip: 192.168.56.141

lamp_ubuntu2204_2hosts_withroles/hosts

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+[webservers]
+192.168.56.141 
+[dbservers]
+192.168.56.142
+
+[webservers:vars]
+ansible_connection=ssh
+ansible_ssh_user=vagrant
+ansible_ssh_pass=vagrant
+ansible_become_pass=vagrant
+ansible_python_interpreter=/usr/bin/python3
+
+[dbservers:vars]
+ansible_connection=ssh
+ansible_ssh_user=vagrant
+ansible_ssh_pass=vagrant
+ansible_become_pass=vagrant
+ansible_python_interpreter=/usr/bin/python3

lamp_ubuntu2204_2hosts_withroles/roles/common/handlers/main.yml

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+---
+# Handler to handle common notifications. Handlers are called by other plays.
+# See http://docs.ansible.com/playbooks_intro.html for more information about handlers.
+
+- name: restart ntp
+  service:
+    name: ntp
+    state: restarted

lamp_ubuntu2204_2hosts_withroles/roles/common/tasks/main.yml

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+---
+# This playbook contains common plays that will be run on all nodes.
+
+- name: Install ntp
+  apt:
+    name: ntp
+    update_cache: true
+    state: present
+  tags: ntp
+
+- name: Configure ntp file
+  template:
+    src: ntp.conf.j2
+    dest: /etc/ntp.conf
+  tags: ntp
+  notify: restart ntp
+
+- name: Start the ntp service
+  service:
+    name: ntp
+    state: started
+    enabled: yes
+  tags: ntp

lamp_ubuntu2204_2hosts_withroles/roles/common/templates/ntp.conf.j2

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+
+driftfile /var/lib/ntp/drift
+
+restrict 127.0.0.1 
+restrict -6 ::1
+
+server {{ ntpserver }}
+
+includefile /etc/ntp/crypto/pw
+
+keys /etc/ntp/keys
+

lamp_ubuntu2204_2hosts_withroles/roles/db/handlers/main.yml

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+---
+# Handler to handle DB tier notifications
+
+- name: restart mysql
+  service:
+    name: mysql
+    state: restarted
+  become: yes
+

lamp_ubuntu2204_2hosts_withroles/roles/db/tasks/main.yml

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+---
+# This playbook will install mysql and create db user and give permissions.
+
+- name: Install Mysql package
+  apt:
+    update_cache: true
+    name: ['mysql-server', 'python3-pip']
+    state: present
+- name: Make sure pymysql is present
+  become: true # needed if the other tasks are not played as root
+  pip:
+    name: pymysql
+    state: present
+
+- name: Create Mysql configuration file
+  template:
+    src: my.cnf.j2
+    dest: /etc/my.cnf
+  notify:
+  - restart mysql
+
+- name: (DATABASE) Allow remote hosts to connect (Debian)
+  lineinfile:
+    path: /etc/mysql/mysql.conf.d/mysqld.cnf
+    backrefs: yes
+    regexp: '^bind-address'
+    line: 'bind-address            = 0.0.0.0'
+    state: present
+  notify: restart mysql
+
+- name: Start Mysql Service
+  service:
+    name: mysql
+    state: started
+    enabled: yes
+
+- name: Sets the root password
+  no_log: true
+  mysql_user:
+    name: root
+    password: "{{ mysql_root_password }}"
+    login_unix_socket: /var/run/mysqld/mysqld.sock
+  ignore_errors: yes
+
+
+#- name: Removes all anonymous user accounts
+#  mysql_user:
+#    name: ''
+#    host_all: yes
+#    state: absent
+
+
+#- name: Removes the MySQL test database
+#  mysql_db:
+#    name: test
+#    state: absent
+
+
+
+
+- name: Create Application Database
+  mysql_db:
+    name: "{{ dbname }}"
+    login_user: root
+    login_password: "{{ mysql_root_password }}"
+    state: present
+
+- name: Create Application DB User
+  no_log: true
+  mysql_user:
+    name: "{{ dbuser }}"
+    password: "{{ upassword }}"
+    login_unix_socket: /var/run/mysqld/mysqld.sock
+    priv: "*.*:ALL"
+    host: '%'
+    state: present
+    login_user: root
+    login_password: "{{ mysql_root_password }}"

lamp_ubuntu2204_2hosts_withroles/roles/db/templates/my.cnf.j2

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+[mysqld]
+datadir=/var/lib/mysql
+socket=/var/lib/mysql/mysql.sock
+user=mysql
+# Disabling symbolic-links is recommended to prevent assorted security risks
+symbolic-links=0
+port={{ mysql_port }}
+bind-address = 0.0.0.0
+
+[mysqld_safe]
+log-error=/var/log/mysqld.log
+pid-file=/var/run/mysqld/mysqld.pid

lamp_ubuntu2204_2hosts_withroles/roles/web/handlers/main.yml

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+---
+# Handler for the webtier: handlers are called by other plays.
+# See http://docs.ansible.com/playbooks_intro.html for more information about handlers.
+
+- name: restart iptables
+  service:
+    name: iptables
+    state: restarted

lamp_ubuntu2204_2hosts_withroles/roles/web/tasks/copy_code.yml

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+---
+# These tasks are responsible for copying the latest dev/production code from
+# the version control system.
+
+- name: Copy the code from repository
+  git:
+    repo: "{{ repository }}"
+    dest: /var/www/html/
+
+- name: Creates the index.php file
+  template:
+    src: index.php.j2
+    dest: /var/www/html/index.php
+  become: yes

lamp_ubuntu2204_2hosts_withroles/roles/web/tasks/install_httpd.yml

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+---
+# These tasks install http and the php modules.
+
+- name: Install http and php etc
+  apt:
+    name: ['apache2', 'php', 'php-mysql', 'git']
+    state: present
+  become: yes
+
+- name: Recursively remove directory
+  ansible.builtin.file:
+    path: /var/www/html
+    state: absent
+
+- name: Create a directory if it does not exist
+  ansible.builtin.file:
+    path: /var/www/html
+    state: directory
+    mode: '0755'
+
+
+- name: http service state
+  service:
+    name: apache2
+    state: started
+    enabled: yes
+  become: yes
+

lamp_ubuntu2204_2hosts_withroles/roles/web/tasks/main.yml

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+---
+- include: install_httpd.yml
+- include: copy_code.yml

lamp_ubuntu2204_2hosts_withroles/roles/web/templates/index.php.j2

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+<html>
+ <head>
+  <title>Ansible Application</title>
+ </head>
+ <body>
+ </br>
+  <a href=http://{{ publicip }}/index.html>Homepage</a>
+ </br>
+<?php 
+ Print "Hello, World! I am a web server configured using Ansible and I am : ";
+ echo exec('hostname');
+ Print  "</BR>";
+echo  "List of Databases: </BR>";
+        {% for host in groups['dbservers'] %}
+                $link = mysqli_connect('{{ databasepublicip }}', '{{ hostvars[host].dbuser }}', '{{ hostvars[host].upassword }}') or die(mysqli_connect_error($link));
+        {% endfor %}
+        $res = mysqli_query($link, "SHOW DATABASES;");
+        while ($row = mysqli_fetch_assoc($res)) {
+                echo $row['Database'] . "\n";
+        }
+?>
+</body>
+</html>
+

lamp_ubuntu2204_2hosts_withroles/site.yml

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+---
+# This playbook deploys the whole application stack in this site.
+
+- name: apply common configuration to all nodes
+  hosts: all
+  remote_user: vagrant
+  become: yes
+
+  roles:
+    - common
+
+- name: configure and deploy the webservers and application code
+  hosts: webservers
+  remote_user: vagrant
+  become: yes
+
+  roles:
+    - web
+
+- name: deploy MySQL and configure the databases
+  hosts: dbservers
+  remote_user: vagrant
+  become: yes
+
+  roles:
+    - db