Port ranges

[mnowster]

Add port range support to docker compose.

Allows us to remove our split_port function and use docker-py's split_port function.

[aanand]

LGTM.

@uvgroovy @mnowster: Thanks team!

[mnowster]

Yay! Yes, thank you @uvgroovy for your helpful contribution ✨

[tequilaskywalk]

why is this missing in 1.8.0-rc1 (build 9bf6bc9 )?

OSX: Native Docker Version 1.12.0-rc2-beta16 (build: 9493)
f615be9fb245904fbdf1aa0cad251d418c869428

Edit: I am experiencing the issue when defining port ranges like so:

docker-compose.yml snippet

version: "2"
services:
serviceA:
ports:
- "5000-6000:5000-6000"

[aanand]

@tequilaskywalk This has been in Compose for several versions now. I just tried your example on Docker for Mac and it crashed the VM. My guess would be that simultaneously binding 1001 ports puts a bit of a strain on it.

[ellioseven]

This still seems to be an issue for me? Am I

[example] cat docker-compose.yml # PHP Web Server
web:
# Build the Drupal 8 image# https://hub.docker.com/r/_/drupal/
image: drupal:8
# Environment variables
environment:
# Drupal settings
DRUPAL_PROFILE: standard
DRUPAL_SITE_NAME: Drupal
DRUPAL_USER: admin
DRUPAL_PASS: admin
DRUPAL_DBURL: mysql://drupal:drupal@database:3406/drupal
ports:
# Host machine's port 8000 will map to Drupal's port 80
- "8000-8100:80"
volumes:
# Drupal should live in the "drupal" directory
- ./drupal:/app
links:
- database:database
command: php -S 0.0.0.0:80 -t /app
working_dir: /app
restart: always
# MySQL Server
database:
image: mysql:5
environment:
MYSQL_USER: drupal
MYSQL_PASSWORD: drupal
MYSQL_DATABASE: drupal
MYSQL_ROOT_PASSWORD: ''
MYSQL_ALLOW_EMPTY_PASSWORD: 'yes'
ports:
- "3306-3406:3306"
volumes:
- ./mysql:/var/lib/mysql
restart: always
[example] docker-compose up ERROR: The Compose file './docker-compose.yml' is invalid because:
database.ports is invalid: Port ranges don't match in lengthweb.ports is invalid: Port ranges don't match in length
[example] docker-compose --version docker-compose version 1.7.1, build 0a9ab35
[example] docker --version Docker version 1.11.2, build b9f10c9

[aanand]

@ellioseven We don't yet support mapping a range on the host to a single container port. This is tracked in #3150.