212 lines
7.0 KiB
Python
212 lines
7.0 KiB
Python
# Copyright (c) 2014 Hewlett-Packard Development Company, L.P.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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# implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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__all__ = [
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'Runner',
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]
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import logging
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import os
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import pwd
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import shlex
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import shutil
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import subprocess
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import sys
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import tempfile
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import textwrap
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logger = logging.getLogger(__name__)
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class Runner(object):
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def __init__(self, args, image_name=None):
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image_name = image_name and "_" + image_name or ""
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self.args = args
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self.project = os.path.basename(os.path.abspath('.'))
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self.base_image_name = 'dox/%s%s_base' % (self.project,
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image_name)
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self.test_image_name = 'dox/%s%s_test' % (self.project,
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image_name)
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self.user_map = self._get_user_mapping()
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self.path_map = self._get_path_mapping()
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def _get_user_mapping(self):
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"""Get user mapping from command line or current user."""
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if self.args.user_map:
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username, uid, gid = self.args.user_map.split(':')
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else:
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username, uid, gid = (pwd.getpwuid(os.getuid())[0],
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os.getuid(),
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os.getgid())
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return {'username': username, 'uid': int(uid), 'gid': int(gid)}
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def _get_path_mapping(self):
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"""Get path mapping from command line."""
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if not self.args.path_map:
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return None
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local, remote = self.args.path_map.split(':', 1)
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return {'local': local, 'remote': remote}
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def is_docker_installed(self):
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try:
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self._docker_cmd("version")
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except OSError as e:
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msg = 'docker does not seem installed'
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if e.errno == 2 and not self.args.debug:
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logger.error(msg)
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else:
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logger.exception(msg)
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return False
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return True
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def _docker_build(self, image, image_dir='.'):
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logger.info('Building image %s' % image)
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self._docker_cmd('build', '-t', image, image_dir)
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def _docker_run(self, *args):
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logger.info('Running docker')
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self._docker_cmd('run', *args)
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def _docker_cmd(self, *args):
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base_docker = ['docker']
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try:
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self._run_shell_command(base_docker + list(args))
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except Exception as e:
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logger.error("docker failed")
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logger.info(e)
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raise
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def _run_shell_command(self, cmd):
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logger.debug('shell: ' + ' '.join(cmd))
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if self.args.noop:
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return
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process = subprocess.Popen(
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cmd, stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
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while True:
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output = process.stdout.read(1)
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if output == '' and process.poll() is not None:
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break
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if output != '' and not self.args.quiet:
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sys.stdout.write(output)
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sys.stdout.flush()
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if process.returncode:
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raise Exception(
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"%s returned %d" % (cmd, process.returncode))
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def _indent(self, text):
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wrapper = textwrap.TextWrapper(
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initial_indent=' ', subsequent_indent=' ')
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return '\n'.join([wrapper.fill(line) for line in text.split('\n')])
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def _get_image_list(self):
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process = subprocess.Popen(
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shlex.split('docker images'),
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stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
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stdout, _ = process.communicate()
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out_text = stdout.strip().decode('utf-8') if stdout else ""
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return dict([f.split()[:2] for f in out_text.split('\n')])
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def have_test_image(self):
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if self.args.rebuild or self.args.rebuild_all:
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return False
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if self.test_image_name in self._get_image_list():
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return True
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return False
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def build_test_image(self, image, commands):
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logger.debug(
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"Want test image %(image)s with %(prep_commands)s" % dict(
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image=self.test_image_name,
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prep_commands=commands.prep_commands()))
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if self.have_test_image():
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return
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dockerfile = []
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dockerfile.append("FROM %s" % image)
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try:
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tempd = tempfile.mkdtemp()
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if not self.user_map['username'] == 'root':
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dockerfile.append(
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"RUN useradd -M -U -d /src -u %(uid)s %(user)s" % dict(
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uid=self.user_map['uid'],
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gid=self.user_map['gid'],
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user=self.user_map['username']))
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for add_file in commands.get_add_files():
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shutil.copy(add_file, os.path.join(tempd, add_file))
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dockerfile.append("ADD %s /dox/" % add_file)
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dockerfile.append("WORKDIR /dox")
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for command in commands.prep_commands():
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dockerfile.append("RUN %s\n" % command)
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dockerfile = '\n'.join(dockerfile)
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with open(os.path.join(tempd, 'Dockerfile'), 'w') as f:
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f.write(dockerfile)
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logger.debug("Dockerfile:\n" + self._indent(dockerfile))
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self._docker_build(self.test_image_name, tempd)
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finally:
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shutil.rmtree(tempd)
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def run_commands(self, command):
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path = os.path.abspath('.')
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if self.path_map:
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path = path.replace(self.path_map['local'],
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self.path_map['remote'])
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docker_args = ['--privileged=true',
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'--user=%s' % self.user_map['username'],
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'-v', "%s:/src" % path,
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'-w', '/src']
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if not self.args.keep_image:
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docker_args.append('--rm')
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docker_args.append(self.test_image_name)
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for c in command:
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docker_args.append(c)
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self._docker_run(*docker_args)
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def have_base_image(self):
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if self.args.rebuild_all:
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return False
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if self.base_image_name in self._get_image_list():
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return True
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return False
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def build_base_image(self):
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logger.debug("Want base image")
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if self.have_base_image():
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return
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self._docker_build(self.base_image_name)
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def run(self, image, command):
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logger.debug(
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"Going to run %(command)s in %(image)s" % dict(
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command=command.test_command(), image=image))
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if self.args.rebuild:
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logger.debug("Need to rebuild")
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if image is None:
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self.build_base_image()
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self.build_test_image(image, command)
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self.run_commands(shlex.split(command.test_command()))
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