OPS635-lab-docker

OPS635 Docker Lab: Cluster Management Using Docker

Overview

Deploying services as containers in a swarm can make it easy to rapidly deploy it across your network, and to scale it up and down as needed.

Pre-Requisites

• You must have an installed host, with at least three virtual machines.
• Each machine must be running an up-to-date version of CentOS.

Materials

• One Solid State Drive (SSD), minimum capacity 240GB, in a USB3 Enclosure.

Investigation 1: Running Docker Containers

• Install Docker on one of your virtual machines.
  • Note: Do not use Docker on your host, as it may interfere with other services covered in this course.
  • Note2: Do not install Docker from the default CentOS repository! Refer to your lecture notes and slides for the current correct method.
• Run the 'hello-world' image to ensure your installation is working.
  • Feel free to remove the container and image afterwards.

Investigation 2: Deploying an image across the swarm

• Run a container using the existing image for httpd and make some changes to the index.html file by using docker exec (The exact content is not important just include some text that says ‘version 1’, I just want to see that you can modify it).
• Commit these changes and push your image to docker hub.

Investigation 3: Managing how images are deployed

• Write a compose file that will deploy one copy of your container onto each of your machines.

Submission

1. Demonstrate your Swarm working in class.
2. Upload your Compose file to Blackboard.