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docker_daemon: add comments

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This commit is contained in:
Johan Euphrosine 2014-11-21 11:22:11 -08:00
parent 141e6399f3
commit e4663f4fbe
1 changed files with 6 additions and 1 deletions
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7
bootstrapvz/plugins/docker_daemon/tasks.py
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@ -86,21 +86,26 @@ class PullDockerImages(Task):
pidfile = os.path.join(info.workspace, 'docker.pid')
try:
# start docker daemon temporarly.
daemon = subprocess.Popen([bin_docker, '-d', '--graph', graph_dir, '-H', socket, '-p', pidfile])
# wait for docker daemon to start.
for _ in range(retries):
if log_check_call([bin_docker, '-H', socket, 'version']) == 0:
break
time.sleep(1)
for img in images:
# docker load if tarball.
if img.endswith('.tar.gz') or img.endswith('.tgz'):
cmd = [bin_docker, '-H', socket, 'load', '-i', img]
if log_check_call(cmd) != 0:
msg = 'error loading docker image {img}.'.format(img=img)
raise TaskError(msg)
else: # regular docker image
# docker pull if image name.
else:
cmd = [bin_docker, '-H', socket, 'pull', img]
if log_check_call(cmd) != 0:
msg = 'error pulling docker image {img}.'.format(img=img)
raise TaskError(msg)
finally:
# shutdown docker daemon.
daemon.terminate()