Task 2

1. Firstly ,create a container image that has jenkins installed using Dockerfile so whenever we launch the container image it should automatically starts the jenkins service in the container.

2.Secondly,create a a chain of jobs(5) using build pipeline plugin in Jenkins which will help to fetch source code, start service, test service, notify the status and in case of failure it will launch new environment in less than a minute .

3. JOB1:--Pull the Github repository automatically when some developers push repository to the Github.

4. JOB2:- By looking at the code or program file, Jenkins should automatically start the respective language interpreter install image container to deploy code eg:- If code is of PHP, then Jenkins should start the container that has PHP already installed 

5.JOB3:- This job for testing our application whether it is working or not

6.JOB4:-The role of this job comes into play when the third job failed due to any reason. It means whenever our application is  not working then we will use python script in this job to sent email to the developer with error messages.

7.JOB5:- Create one extra job namely JOB5 for monitoring which will see whether our workspace is doing well or not if found it failing it will immediately launch a new container with the same configuration.

STEP 1- In this step, we created a Dockerfile & run the build command. An image with mytask2 is created and a container is launched with jenkins .

STEP 2:- As soon as the container launched , the jenkins can be acessed with port no 9000 then we can configure the jenkins .

STEP 3:- JOB1 starts, after pushing the files in the github , the job 1 of the jenkins starts and it pulls all the files from the github as soon as the developer pushes into the repo. Here i used the Poll Scm but we can also use the webhook.

STEP 4:- JOB2 starts, This will be triggered as soon as Job1 completes and will deploy a containers on the host system. Here I have taken the example of webpages of php and html, so I have used the apache webserver.

STEP 5:- JOB3 starts, Job3 will be successfully built if the test fails so it can go to Job4 and mail to dev.

STEP 6:- JOB4 starts , It is the email notification sent by the QAT to the developer that the websites has been checked. And it is working fine , if developer doesn't get any notification then there is a some problem.

Here, i created a python code but you can also use a jenkins plugin for email notification.

STEP 7:- JOB5 starts, This job check every minute, if the deployed container is up or not. If not, it restart the container again.

CREATION OF BUILD PIPELINE VIEW:-