NetCracker Technology Education Center Spring 2020

Field of study: DevOps

Project members:

• https://github.com/karpovichart
• https://github.com/xbxjsnsb
• https://github.com/blackberry22

Overview

This project allows you to automatically create the infrastructure for a web application using the example of CMS WordPress. The main features of the project include the use of a CI/CD server to configure all application servers, the creation of a separate application for monitoring servers, the use of an external database and load balancer for the application.

Used tools:

• Terraform
• Ansible
• Jenkins
• Docker
• AWS
• Python
• WordPress (Apache WebServer, MySQL Database, NGINX as load balancer)

Preinstall

Before running the application, you must install:

• Terraform
• Ansible
• Python 3.6

This can be done manually or use the following Python script:

import subprocess

#clone repository
subprocess.call("git clone https://github.com/karpovichart/devops.git", shell=True)

#install terraform
subprocess.call("wget https://releases.hashicorp.com/terraform/0.12.24/terraform_0.12.24_linux_amd64.zip", shell=True)
subprocess.call("sudo apt install unzip", shell=True)
subprocess.call("unzip terraform_0.12.24_linux_amd64.zip", shell=True)
subprocess.call("rm terraform_0.12.24_linux_amd64.zip", shell=True)
subprocess.call("sudo mv terraform /bin/", shell=True)

#install ansible
subprocess.call("sudo apt-add-repository ppa:ansible/ansible -y", shell=True)
subprocess.call("sudo apt-get update", shell=True)
subprocess.call("sudo apt-get install ansible -y", shell=True)

subprocess.call("python3 devops/scripts/orchestration/orchestrating_script.py", shell=True)

You must also have an AWS account with the user created in the IAM section. As a result, you need to create a terraform.tfvars file with the following contents:

AWS_ACCESS_KEY = "xxxxxx"
AWS_SECRET_KEY = "xxxxxx"

Deployment

Assumed that two files were created as described above:

• init.py (you can name it whatever you want)
• terraform.tfvars

Run script:

python3 init.py

Next, you need to enter values depending on the required tasks:

1. Choose deploy or destroy existing infrastructure
2. Enter ansible password
3. Choose mode (single side- one WordPress server, multi side - two WordPress servers with load balancer)

As a result, the script will output ip addresses for each server:

Infrastructure has been successfully deployed
Jenkins CI/CD server: x.x.x.x:8080/jenkins
WordPress 1 server: x.x.x.x
Load Balancer server: x.x.x.x
Monitoring App: x.x.x.x:5000