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# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import logging
import os
import subprocess # nosec
import sys
def make_a_logger(conf=None, image_name=None):
if image_name:
log = logging.getLogger(".".join([__name__, image_name]))
else:
log = logging.getLogger(__name__)
if not log.handlers:
if conf is None or not conf.logs_dir or not image_name:
handler = logging.StreamHandler(sys.stderr)
log.propagate = False
else:
filename = os.path.join(conf.logs_dir, "%s.log" % image_name)
handler = logging.FileHandler(filename, delay=True)
handler.setFormatter(logging.Formatter(logging.BASIC_FORMAT))
log.addHandler(handler)
if conf is not None and conf.debug:
log.setLevel(logging.DEBUG)
else:
log.setLevel(logging.INFO)
return log
LOG = make_a_logger()
def get_docker_squash_version():
try:
stdout = subprocess.check_output( # nosec
['docker-squash', '--version'], stderr=subprocess.STDOUT)
return stdout.split()[0]
except OSError as ex:
if ex.errno == 2:
LOG.error(('"docker-squash" command is not found.'
' try to install it by "pip install docker-squash"'))
raise
def squash(old_image, new_image,
from_layer=None,
cleanup=False,
tmp_dir=None):
cmds = ['docker-squash', '--tag', new_image, old_image]
if cleanup:
cmds += ['--cleanup']
if from_layer:
cmds += ['--from-layer', from_layer]
if tmp_dir:
cmds += ['--tmp-dir', tmp_dir]
try:
subprocess.check_output(cmds, stderr=subprocess.STDOUT) # nosec
except subprocess.CalledProcessError as ex:
LOG.exception('Get error during squashing image: %s',
ex.output)
raise
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