Simple DevOps Project

1. Launch an EC2 instance for Docker host

2.  Install Git
      yum install -y git
   

3. Install docker on EC2 instance and start services yum install -y docker systemctl start docker

4. Create new user for Docker management & add to Docker (default) group useradd dockeradmin -p "password" usermod -aG docker dockeradmin

5. Create Directories mkdir data cd data/ mkdir docker cd docker/ mkdir simple cd simple/

6. Create Dockerfile - /data/docker/simple vim Dockerfile

   Pull Image

   From tomcat:8-jre8

   Maintainer

   MAINTAINER "ralph.adekoya@sofology.co.uk"

   Copy war

   COPY ./webapp.war /usr/local/tomcat/webapps

7. Login to Jenkins Manage Jenkins --> Configure system --> Publish over SSH --> add Docker server and credentials

8. Create Jenkins Job

   A. Source Code Management
    Repository: https://github.com/radek5/simple.git
    Branches to build: */master
   
   B. Build Root POM: pom.xml
    Goals and options: Clean install package
   
   C. Send files or execute commands over SSH Name: DOCKER_HOST
    Source files: webapp/target/*.war
    Remove prefix: webapp/target/
    Remote directory: /data/docker
    Exec command: docker stop simple_demo; docker rm -f simple_demo; docker image rm -f simple_demo; cd /data/docker; 
    docker build -t simple_demo
   
   D. Send files or execute commands over SSJ
        Name: docker_host
    Exec command: docker run -d --name simple_demo -p 8080:8080 simple_demo 
   

9. Login to docker host, check images and containers (No images and containers)

10. Execute Jenkins job

11. Check images and containers on docker host (This time an image and container is created)

12. Access web application - docker_host_ip:8080