def extract(self, image, src, dest, namespace, update=True):
"""
Extract contents of a container image from 'src' in container
to 'dest' in host.
Args:
image (str): Name of container image
src (str): Source path in container
dest (str): Destination path in host
update (bool): Update existing destination, if True
"""
if os.path.exists(dest) and not update:
return
cleaned_image_name = Utils.sanitizeName(image)
pod_name = '{}-{}'.format(cleaned_image_name, Utils.getUniqueUUID())
container_name = cleaned_image_name
# Pull (if needed) image and bring up a container from it
# with 'sleep 3600' entrypoint, just to extract content from it
artifact = {
'apiVersion': 'v1',
'kind': 'Pod',
'metadata': {
'name': pod_name
},
'spec': {
'containers': [
{
'image': image,
'command': [
'sleep',
'3600'
],
'imagePullPolicy': 'IfNotPresent',
'name': container_name
}
],
'restartPolicy': 'Always'
}
}
self.create(artifact, namespace)
try:
self._wait_till_pod_runs(namespace, pod_name, timeout=300)
# Archive content from the container and dump it to tmpfile
tmpfile = '/tmp/atomicapp-{pod}.tar.gz'.format(pod=pod_name)
self._execute(
namespace, pod_name, container_name,
'tar -cz --directory {} ./'.format('/' + src),
outfile=tmpfile
)
finally:
# Delete created pod
self.delete(artifact, namespace)
# Extract archive data
tar = tarfile.open(tmpfile, 'r:gz')
tar.extractall(dest)
def init(self):
self.namespace = DEFAULT_NAMESPACE
self.default_name = DEFAULT_CONTAINER_NAME
logger.debug("Given config: %s", self.config)
if self.config.get("namespace"):
self.namespace = self.config.get("namespace")
logger.debug("Namespace: %s", self.namespace)
if "image" in self.config:
self.image = Utils.sanitizeName(self.config.get("image"))
else:
self.image = Utils.getUniqueUUID()
logger.warning(
"The artifact name has not been provided within Nulecule, using a UUID instead"
)
logger.debug(
"No image name found for artifact, using UUID %s in container name"
% self.image)
if self.dryrun:
logger.info("DRY-RUN: Did not check Docker version compatibility")
else:
cmd_check = ["docker", "version"]
try:
docker_version = subprocess.check_output(cmd_check).split("\n")
except Exception as ex:
raise ProviderFailedException(ex)
client = ""
server = ""
for line in docker_version:
if line.startswith("Client API version"):
client = line.split(":")[1]
if line.startswith("Server API version"):
server = line.split(":")[1]
if client > server:
msg = (
"Docker version in app image (%s) is higher than the one "
"on host (%s). Please update your host." %
(client, server))
raise ProviderFailedException(msg)
def init(self):
self.namespace = DEFAULT_NAMESPACE
self.default_name = DEFAULT_CONTAINER_NAME
logger.debug("Given config: %s", self.config)
if self.config.get("namespace"):
self.namespace = self.config.get("namespace")
logger.debug("Namespace: %s", self.namespace)
if "image" in self.config:
self.image = Utils.sanitizeName(self.config.get("image"))
else:
self.image = Utils.getUniqueUUID()
logger.warning("The artifact name has not been provided within Nulecule, using a UUID instead")
logger.debug("No image name found for artifact, using UUID %s in container name" % self.image)
if self.dryrun:
logger.info("DRY-RUN: Did not check Docker version compatibility")
else:
cmd_check = ["docker", "version"]
try:
docker_version = subprocess.check_output(cmd_check).split("\n")
except Exception as ex:
raise ProviderFailedException(ex)
client = ""
server = ""
for line in docker_version:
if line.startswith("Client API version"):
client = line.split(":")[1]
if line.startswith("Server API version"):
server = line.split(":")[1]
if client > server:
msg = (
"Docker version in app image (%s) is higher than the one "
"on host (%s). Please update your host." % (client, server)
)
raise ProviderFailedException(msg)
