Java Application deployment using Ansible - Java, Tomcat and MySQL installation & configuration management

About: This is a simple java project Deployment to a remote server using Ansible. In this demo, you can see how to install the pre-requisites and other requirements before deploying the project.

1. JAVA 1.8 installation
2. Tomcat web server
3. MySQL 5.7 database
4. Python packages
5. User creation
6. DB Creation
7. Table creation

1. Creat two roles.. one tomcat & other mysql using ansible-galaxy

ansible-galaxy init tomcat
ansible-galaxy init mysql

It will create all defult folder structure.. keep the folders which you require and remove the rest for better visibility and understanding.

2. Create a folder called group_vars in the same folder where 'Roles' folder is present, to keep the variables and vault information.

[centos@ip-172-31-24-62 ansible]$ ls -l group_vars/all
total 8
-rw-r--r--. 1 root root  99 Feb 19 18:24 vars
-rw-r--r--. 1 root root 419 Feb 19 18:25 vault

3. Create a folder called db in the same folder where 'Roles' folder is present, to store the sql script to import whie installing the mysql

[centos@ip-172-31-24-62 ansible]$ ls -l db/
total 4
-rw-r--r--. 1 root root 402 Feb 18 18:47 devopsclass.sql

4. Add the tasks into the main.yml file of the respective roles.

[centos@ip-172-31-24-62 ansible]$ ls -l roles/tomcat/tasks/
total 4
-rw-r--r--. 1 root root 1117 Feb 19 17:16 main.yml

[centos@ip-172-31-24-62 ansible]$ ls -l roles/mysql/tasks/
total 4
-rw-r--r--. 1 root root 1245 Feb 19 18:02 main.yml

5. Once you setup the project run the play book (site.yml) - site.yml contains the roles which need to be executed.

ansible-playbook roles/site.yml

Note: Here we have used onle one server to install both webserver and database. I will update this further and add the DB part into a different database server.

After the successfull execution of the playbook, you can view the application by logging into it.

e.i.

And check the Databae:

[centos@ip-172-31-42-48 bin]$ mysql -u ranjit -p
Enter password: 
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 2
Server version: 5.6.47 MySQL Community Server (GPL)

Copyright (c) 2000, 2020, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| devopsclass        |
| mysql              |
| performance_schema |
+--------------------+
4 rows in set (0.00 sec)

mysql>