docker-compose-monitor

#!/usr/bin/python
import sys
import os
import re
from subprocess import Popen, PIPE

cfg_compose_file = None
containers = None
pchilds = None

DOCKER_COMPOSE_CMD = '/usr/bin/docker-compose'
DOCKER_CMD = '/usr/bin/docker'

def get_composed_containsers(cfg_file):
  out, err = Popen([DOCKER_COMPOSE_CMD, '-f', cfg_file, 'ps', '-q'], stdout=PIPE, stderr=PIPE).communicate()
  return out.splitlines()

def start_docker_logs(container_id):
  global pchilds
  if pchilds is None:
    pchilds = []

  p = Popen([DOCKER_CMD, 'logs', '-f', container_id], stdout=sys.stdout, stderr=sys.stderr, stdin=PIPE)
  pchilds.append(p)
  p.stdin.close()

if __name__ == "__main__":
  if not os.path.exists(sys.argv[1]):
    sys,exit(1)

  cfg_compose_file = sys.argv[1]
  containers = get_composed_containsers(cfg_compose_file)
  for c_id in containers:
    start_docker_logs(c_id)

  pid, rc = os.wait()

  for p in pchilds:
    if p.poll() is None:
      p.kill()
    p.poll()  ## just read rc

  sys.exit(rc)