1.

How can Jenkins facilitate Deployment in a DevOps practice?

Answer»

Jenkins auto-builds the source code from Git(any VCS) at every check-in; tests the source code and deploy the code in a tomcat environment via docker.

WEBAPP source code is then DEPLOYED by tomcat server on a production environment.

Pre-requisite:

  • Jenkins plugin: “Deploy to container” and “git plugin”
  • Edit the ‘post-build’ actions to include the tomcat details.
  • Under the SCM section add your git project repository url.

Git project structure:

Divya1@DIVYA:myWeb [master] $ Dockerfile    webapp/        WEB-INF/          classes/          lib/          web.xml     index.jsp --Dockerfile content: vi Dockerfile FROM tomcat:9.0.1-jre8-alpine ADD ./webapp /usr/local/tomcat/webapps/webapp CMD ["catalina.sh","run"]

Add a new project in Jenkins and TRACK your git project url under SCM section.Have a dockerfile with the instruction to connect to the tomcat docker and deploy the webapp folder.

--Add the build section to ‘execute shell’ as below:

#!/bin/sh echo "Build started..." docker build -t webapp . echo "Deploying webapp to tomcat" docker run -p 8888:8080 webapp echo http://localhost:8888/webapp --Build the project from Jenkins:

Below is the screenshot of the output:

--CLICK on the link: http://localhost:8888/webapp


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