def initialize(self, **kwargs):
BarrierAppDROP.initialize(self, **kwargs)
self._image = self._getArg(kwargs, "image", None)
if not self._image:
raise Exception("No docker image specified, cannot create DockerApp")
if ":" not in self._image:
logger.warn("%r: Image %s is too generic since it doesn't specify a tag" % (self, self._image))
self._command = self._getArg(kwargs, "command", None)
if not self._command:
raise Exception("No command specified, cannot create DockerApp")
# The user used to run the process in the docker container
# By default docker containers run as root, but we don't want to run
# a process using a different user because otherwise anything that that
# process writes to the filesystem
self._user = self._getArg(kwargs, "user", None)
# In some cases we want to make sure the command in the container runs
# as a certain user, so we wrap up the command line in a small script
# that will create the user if missing and switch to it
self._ensureUserAndSwitch = self._getArg(kwargs, "ensureUserAndSwitch", self._user is None)
# By default containers are removed from the filesystem, but people
# might want to preserve them.
# TODO: This might be something that the data lifecycle manager could
# handle, but for the time being we do it here
self._removeContainer = self._getArg(kwargs, "removeContainer", True)
# Additional volume bindings can be specified for existing files/dirs
# on the host system.
self._additionalBindings = {}
for binding in self._getArg(kwargs, "additionalBindings", []):
if binding.find(":") == -1:
host_path = container_path = binding
else:
host_path, container_path = binding.split(":")
if not os.path.exists(host_path):
raise ValueError("'Path %s doesn't exist, cannot use as additional volume binding" % (host_path,))
self._additionalBindings[host_path] = container_path
if logger.isEnabledFor(logging.INFO):
logger.info("%r with image '%s' and command '%s' created" % (self, self._image, self._command))
# Check if we have the image; otherwise pull it.
extra_kwargs = self._kwargs_from_env()
c = AutoVersionClient(**extra_kwargs)
found = reduce(lambda a, b: a or self._image in b["RepoTags"], c.images(), False)
if not found:
if logger.isEnabledFor(logging.DEBUG):
logger.debug("Image '%s' not found, pulling it" % (self._image))
start = time.time()
c.pull(self._image)
end = time.time()
if logger.isEnabledFor(logging.DEBUG):
logger.debug("Took %.2f [s] to pull image '%s'" % ((end - start), self._image))
else:
if logger.isEnabledFor(logging.DEBUG):
logger.debug("Image '%s' found, no need to pull it" % (self._image))
self._containerIp = None
self._containerId = None
self._waiters = []
