DEVOPS AUTOMATION

Introduction of applications used:

1. Github : Github is a centralised system where we can upload or download the code .It is good example of SCM where we can store ,manage and roll-bcak our code.
2. Docker : Docker is a container tool where we can setup OS just a second ,by downloading and configuring .It also works as a fast technique for deploying the code.
3. Jenkins : Jenkins is used to build and test your software projects continuously. It will integrate the code easier.

Creating a repository in Github:

Create a repository and initialize it .

In Git Bash:

##creating local repo##

1.Cloning the github repo in GIT BASH.

2.POST-COMMIT : creating a notepad file for post commit

Why use post-commit? In Jenkins post-commit  are used to trigger the build whenever a developer commits something to the master branch.

Code:

#!/bin/bash

git push

3.Creating a branch (dev1)

Jenkins:

1. Creating Job1

and configuring the repo we made in git hub

Writing shell code to be run in RHEL 8:

if sudo docker ps | grep main_server

then

echo " Server is already running"

else 

sudo docker run -d -t -i -p 8081:80 -v /main_directory:/usr/local/apache2/htdocs --name docker_server httpd

fi

sudo cp -r -v -f * /main_driectory/

Creating Job 2:

Writing shell code to be run in RHEL 8:

if sudo docker ps | grep test_server

then

echo " Server is already running"

else 

sudo docker run -d -t -i -p 8081:80 -v /test_directory:/usr/local/apache2/htdocs --name docker2_server httpd

fi

sudo cp -r -v -f * /test_directory/

Creating Job 3:

Master branch is configured with Job1 which automatically deploy the data.

Dev1 Branch is configured with Job2 which automatically deploy docker container.

Job3 is made for testing . If testing is successful then jenkins will merge the dev1 branch to master branch .And alos it will trigger the job1.