[TBD]Useful info about Docker compose utility

Introduction

Laymen explanation

Technical explanation

Installation

Install docker-compose tool

$curl -L "https://github.com/docker/compose/releases/download/1.11.1/docker-$compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose

chmod +x /usr/local/bin/docker-compose

Usage

Prerequisite

Remember to configure environment variable COMPOSE_API_VERSION

COMPOSE_API_VERSION configuration

$export COMPOSE_API_VERSION=auto

Above environment allows docker-compose client to automatically detect the client version

Example compose file

Docker compose supports YAML syntax for configuration data.

Example script

$ cat config.txt

DUT-BRIDGE_0:

container_name: DUT-BRIDGE_0_my

image: ubuntu:14.04

ports:

- 22

- 80

tty: true

privileged: true

ulimits:

core: -1

Example command

Example command

$docker-compose -f config.txt up -d

$docker ps

CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES

8fc9c5e3699b ubuntu:14.04 "/bin/bash" 4 seconds ago Up 2 seconds 0.0.0.0:32792->22/tcp, 0.0.0.0:32793->80/tcp DUT-BRIDGE_0_my

Above command shows a docker container with name DUT-BRIDGE_0_my

Useful options

FAQ

Using variable in the docker compose file (docker-compose.yaml)

Ref: https://serversforhackers.com/c/div-variables-in-docker-compose

Environment variable not visible when used sudo with docker-compose

Use -E option

Ref: https://forums.docker.com/t/docker-compose-not-seeing-environment-variables-on-the-host/11837/7

Running docker command in non-privileged user

Add user to docker group

Ref: https://askubuntu.com/questions/477551/how-can-i-use-docker-without-sudo

Reference

https://docs.docker.com/compose/install/

http://stackoverflow.com/questions/29727171/docker-compose-up-leads-to-client-and-server-dont-have-same-version-client

https://en.wikipedia.org/wiki/YAML