docker-compose-2019-12-12.md

version: '3'

services:
  a:
    image: ubuntu
    command: sleep 999

  b:
    image: ubuntu
    command: echo hello
    depends_on:
      - a

$ docker-compose up --exit-code-from b; echo $?
WARNING: using --exit-code-from implies --abort-on-container-exit
Starting tmp_a_1 ... done
Starting tmp_b_1 ... done
Attaching to tmp_a_1, tmp_b_1
b_1  | hello
tmp_b_1 exited with code 0
Aborting on container exit...
Stopping tmp_a_1 ... done
0```