Ansible Workflow

1. Make a list of all the commands/steps for deploying the applciation
2. Execute them manually.
3. Write a Ansible Playbook with the task for each command/step.

Sample-Application

Spring-pet Clinic

• This application is based out of java spring framework
• Prereqs:
  • Java 8 should be installed.
• Download the Spring-petclinic.jar file file from here
• once application is downloaded execute the following command in the terminal

java -jar <path to spring-petclinic.jar>

Manual Steps

• Deploy Spring Pet Clinic which by default runs on 8080 port

sudo apt-get update
sudo apt-cache search jdk | less
sudo apt-get install openjdk-8-jdk -y
java -version
wget https://qt-s3-new-testing.s3-us-west-2.amazonaws.com/spring-petclinic.jar
java -jar spring-petclinic.jar

• Access your application using http://<publicip&gt;:8080

Student Courses Application

• This is application written in Python Flask
• Prereqs:
  • Python 3
  • pip-3
• Steps

sudo apt-get update
sudo apt-get install python3 python3-pip git -y
git clone https://github.com/DevProjectsForDevOps/StudentCoursesRestAPI.git
cd StudentCoursesRestAPI
pip3 install -r requirements
python3 app.py

• Access your application using http://<publicip&gt;:8080

Using Ansible For deployment of Sample Application

• This can be done by writing Playbooks.
• To Write effective Playbooks, we need to know
  • YAML
  • Modules
  • Tasks
  • Ansible-ENvironment Variables
  • Inventory
  • Ansible Configuration

YAML

• Is much like JSON.
• It is collection of name value pairs
• Refer here for YAML Syntax