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 a Container From a Custom Image

• Run a container using the existing image for httpd.
  • 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 with the tag v1.

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.