Overview

Our goal is to Dockerize the collector, redis server, and flask server of the simple COVID app. We will:

• Create containers for the collector and server
• Develop commands to launch and destroy the redis, collector, and server containers
• Create scripts to launch and destroy the entire system

Build a Container for the Collector

• Create a Dockerfile (same basic pattern as the db_simple_web_server)
• Build the Docker container and tag it with the name covid_collector

Build a Container for the Server

• Create a Dockerfile (same basic pattern as the collector)
• Build the Docker container and tag it with the name covid_server

Launch the System

• Create a network named covid
• Launch a Redis container
  • Run the container in the covid network
  • Name the container redis
• Launch an instance of the covid_collector
  • Run the container in the covid network
  • Name the container covid_collector
  • Create an environment variable named REDIS_HOST with the value redis
  • Create an environment variable named REDIS_PORT with the value 6379
• Launch an instance of the covid_server
  • Launch the container in the covid network
  • Name the container covid_server
  • Create an environment variable named REDIS_HOST with the value redis
  • Create an environment variable named REDIS_PORT
  • Expose port 8000

Create a Launch Script

• In a file named up:
  • Launch the Redis container
  • Launch the collector container
  • Launch the server container
• In a file named down:
  • Stop (and remove) the server
  • Stop (and remove) the collector
  • Stop (and remove) the redis container
• Add executable permissions to both files
  • e.g. chmod +x up
• Run ./up to start the system
• Run /.down to stop the system