rberger / docker-compose-simple-example

Simple example of cross container communication that works on Docker for Mac

Docker Compose Example with Consul

Started from https://www.sumologic.com/blog/devops/how-to-build-applications-docker-compose/

Only differences

• Used the more modern Docker for Mac
  • It uses the builtin Hyperkit of Docker for MacOS
  • DID NOT USE docker-machine
  • No longer a need to have the link: as docker-compose will automatically create a default network and make the service names usable without the link:
• Was able to access the docker containers that expose ports using localhost on my Mac
  • Was able to browse to http://localhost for accessing the NGINX
  • Was able to browse to http://localhost:8500 to access the Consul UI
    • Could see the key/value set by the python application
    • Could update the value in the Consul UI and see the result in the NGINX/Python app on refreshing http://localhost
• Did not use localhost to reference between containers, used the service name
• Added a Consul just like in irmin
  • No need for container_name in the docker_compose

To Use

To run

cd compose
docker-compose up -d --build

To try out

• Browse to http://localhost and see something like

Hello World!
mykey value: myvalue

• In another browser window go to http://localhost:8500/ui/#/dc1/kv/mykey/edit (The Key/Value page of the Consul UI)
  • You will see the key mykey with the value of myvalue
• You can update the value to something else here
  • Refresh http://localhost and you will see the updated value

To shut down

docker-compose down