"""
docker container DNS tester
"""
# Adding the ignore because it does not like the naming of the script
# to be different than the class name
# pylint: disable=invalid-name
from docker import AutoVersionClient
from openshift_tools.monitoring.zagg_sender import ZaggSender
ZBX_KEY = "docker.container.dns.resolution"
if __name__ == "__main__":
cli = AutoVersionClient(base_url="unix://var/run/docker.sock")
container = cli.create_container(
image="docker-registry.ops.rhcloud.com/ops/oso-rhel7-host-monitoring", command="getent hosts redhat.com"
)
cli.start(container=container.get("Id"))
exit_code = cli.wait(container)
cli.remove_container(container.get("Id"))
zs = ZaggSender()
zs.add_zabbix_keys({ZBX_KEY: exit_code})
print "Sending these metrics:"
print ZBX_KEY + ": " + str(exit_code)
zs.send_metrics()
print "\nDone.\n"
ZBX_KEY = "docker.container.dns.resolution"
if __name__ == "__main__":
cli = AutoVersionClient(base_url='unix://var/run/docker.sock')
container_id = os.environ['container_uuid']
container = cli.create_container(
image=cli.inspect_container(container_id)['Image'],
command='getent hosts redhat.com')
cli.start(container=container.get('Id'))
exit_code = cli.wait(container)
for i in range(0, 3):
try:
cli.remove_container(container.get('Id'))
break
except APIError:
print "Error while cleaning up container."
time.sleep(5)
ms = MetricSender()
ms.add_metric({ZBX_KEY: exit_code})
print "Sending these metrics:"
print ZBX_KEY + ": " + str(exit_code)
ms.send_metrics()
print "\nDone.\n"
class DockerClient(object):
"""
This client is a "translator" between docker-py API and
the standard docker command line. We need one because docker-py
does not use the same naming for command names and their parameters.
For example, "docker ps" is named "containers", "-n" parameter
is named "limit", some parameters are not implemented at all, etc.
"""
def __init__(self, timeout=None, clear_handler=None, refresh_handler=None):
"""
Initialize the Docker wrapper.
:param timeout: int
:param clear_handler: callable
:param refresh_handler: callable
"""
assert callable(clear_handler)
assert callable(refresh_handler)
self.handlers = {
'attach': (self.attach, 'Attach to a running container.'),
'build': (self.build, ("Build a new image from the source"
" code")),
'clear': (clear_handler, "Clear the window."),
'create': (self.create, 'Create a new container.'),
'exec': (self.execute, ("Run a command in a running"
" container.")),
'help': (self.help, "Help on available commands."),
'pause': (self.pause, "Pause all processes within a container."),
'ps': (self.containers, "List containers."),
'port': (self.port, ("List port mappings for the container, or "
"lookup the public-facing port that is "
"NAT-ed to the private_port.")),
'pull': (self.pull, ("Pull an image or a repository from the "
"registry.")),
'push': (self.push, ("Push an image or a repository to the "
"registry.")),
'images': (self.images, "List images."),
'info': (self.info, "Display system-wide information."),
'inspect': (self.inspect, "Return low-level information on a " +
"container or image."),
'login': (self.login, ("Register or log in to a Docker registry "
"server (defaut "
"\"https://index.docker.io/v1/\").")),
'logs': (self.logs, "Fetch the logs of a container."),
'refresh': (refresh_handler, "Refresh autocompletions."),
'restart': (self.restart, "Restart a running container."),
'run': (self.run, "Run a command in a new container."),
'rm': (self.rm, "Remove one or more containers."),
'rmi': (self.rmi, "Remove one or more images."),
'search': (self.search, "Search the Docker Hub for images."),
'shell': (self.shell, "Get shell into a running container."),
'start': (self.start, "Restart a stopped container."),
'stop': (self.stop, "Stop a running container."),
'tag': (self.tag, "Tag an image into a repository."),
'top': (self.top, "Display the running processes of a container."),
'unpause': (self.unpause, ("Unpause all processes within a "
"container.")),
'version': (self.version, "Show the Docker version information."),
}
self.output = None
self.after = None
self.command = None
self.logs = None
self.is_refresh_containers = False
self.is_refresh_running = False
self.is_refresh_images = False
disable_warnings()
if sys.platform.startswith('darwin') \
or sys.platform.startswith('win32'):
try:
# mac or win
kwargs = kwargs_from_env()
# hack from here:
# http://docker-py.readthedocs.org/en/latest/boot2docker/
# See also: https://github.com/docker/docker-py/issues/406
if 'tls' in kwargs:
kwargs['tls'].assert_hostname = False
kwargs['timeout'] = timeout
self.instance = AutoVersionClient(**kwargs)
except DockerException as x:
if 'CERTIFICATE_VERIFY_FAILED' in x.message:
raise DockerSslException(x)
elif 'ConnectTimeoutError' in x.message:
raise DockerTimeoutException(x)
else:
raise x
else:
# unix-based
self.instance = AutoVersionClient(
timeout=timeout,
base_url='unix://var/run/docker.sock')
def handle_input(self, text):
"""
Parse the command, run it via the client, and return
some iterable output to print out. This will parse options
and arguments out of the command line and into parameters
consistent with docker-py naming. It is designed to be the
only really public method of the client. Other methods
are just pass-through methods that delegate commands
to docker-py.
:param text: user input
:return: iterable
"""
def reset_output():
""" Set all internals to initial state."""
self.command = None
self.is_refresh_containers = False
self.is_refresh_running = False
self.is_refresh_images = False
self.after = None
self.logs = None
tokens = shlex.split(text) if text else ['']
cmd = tokens[0]
params = tokens[1:] if len(tokens) > 1 else None
reset_output()
if cmd and cmd in self.handlers:
handler = self.handlers[cmd][0]
self.command = cmd
if params:
try:
if '-h' in tokens or '--help' in tokens:
self.output = [format_command_help(cmd)]
else:
parser, popts, pargs = parse_command_options(
cmd, params)
if 'help' in popts:
del popts['help']
self.output = handler(*pargs, **popts)
except APIError as ex:
reset_output()
self.output = [ex.explanation]
except OptionError as ex:
reset_output()
raise ex
except Exception as ex:
reset_output()
self.output = [ex.__repr__()]
else:
self.output = handler()
elif cmd:
self.output = self.help()
def attach(self, *args, **kwargs):
"""
Attach to a running container.
:param kwargs:
:return: None
"""
if not args:
return ['Container name or ID is required.']
container = args[0]
def on_after():
self.is_refresh_containers = True
self.is_refresh_running = True
return ['\rDetached from {0}.'.format(container)]
self.after = on_after
command = format_command_line('attach', False, args, kwargs)
process = pexpect.spawnu(command)
process.interact()
def help(self, *_):
"""
Collect and return help docstrings for all commands.
:return: list of tuples
"""
help_rows = [(key, self.handlers[key][1])
for key in COMMAND_NAMES]
return help_rows
def not_implemented(self, *_):
"""
Placeholder for commands to be implemented.
:return: iterable
"""
return ['Not implemented.']
def version(self, *_):
"""
Return the version. Equivalent of docker version.
:return: list of tuples
"""
try:
verdict = self.instance.version()
result = [(k, verdict[k]) for k in sorted(verdict.keys())]
return result
except ConnectionError as ex:
raise DockerPermissionException(ex)
def info(self, *_):
"""
Return the system info. Equivalent of docker info.
:return: list of tuples
"""
rdict = self.instance.info()
result = [(k, rdict[k]) for k in sorted(rdict.keys())]
return result
def inspect(self, *args, **_):
"""
Return image or container info. Equivalent of docker inspect.
:return: dict
"""
if not args or len(args) == 0:
yield 'Container or image ID is required.'
cs = self.containers(all=True)
cids = set([])
cnames = set([])
if cs and len(cs) > 0 and isinstance(cs[0], dict):
cids = set([c['Id'] for c in cs])
cnames = set([name for c in cs for name in c['Names']])
for cid in args:
if cid in cids or cid in cnames:
info = self.instance.inspect_container(cid)
else:
info = self.instance.inspect_image(cid)
yield info
def containers(self, *_, **kwargs):
"""
Return the list of containers. Equivalent of docker ps.
:return: list of dicts
"""
# Truncate by default.
if 'trunc' in kwargs and kwargs['trunc'] is None:
kwargs['trunc'] = True
csdict = self.instance.containers(**kwargs)
if len(csdict) > 0:
if 'quiet' not in kwargs or not kwargs['quiet']:
# Container names start with /.
# Let's strip this for readability.
for i in range(len(csdict)):
csdict[i]['Names'] = list(map(
lambda x: x.lstrip('/'), csdict[i]['Names']))
csdict[i]['Created'] = pretty.date(csdict[i]['Created'])
if 'Labels' in csdict[i]:
del csdict[i]['Labels']
return csdict
else:
return ['There are no containers to list.']
def pause(self, *args, **kwargs):
"""
Pause all processes in a container. Equivalent of docker pause.
:param kwargs:
:return: Container ID or iterable output.
"""
if not args:
return ['Container name is required.']
kwargs['container'] = args[0]
self.instance.pause(**kwargs)
return [kwargs['container']]
def port(self, *args, **_):
"""
List port mappings for the container. Equivalent of docker port.
:param kwargs:
:return: Container ID or iterable output.
"""
if not args:
return ['Container name is required.']
port_args = [args[0], None]
port_args[1] = args[1] if len(args) > 1 else None
result = self.instance.port(*port_args)
if result:
return result
return ['There are no port mappings for {0}.'.format(args[0])]
def rm(self, *args, **kwargs):
"""
Remove a container. Equivalent of docker rm.
:param kwargs:
:return: Container ID or iterable output.
"""
truncate_output = False
if 'all_stopped' in kwargs and kwargs['all_stopped']:
if args and len(args) > 0:
return ['Provide either --all-stopped, or container name(s).']
containers = self.instance.containers(
quiet=True,
filters={'status': 'exited'})
if not containers or len(containers) == 0:
return ['There are no stopped containers.']
containers = [c['Id'] for c in containers]
truncate_output = True
else:
containers = args
kwargs = allowed_args('rm', **kwargs)
def stream():
for container in containers:
try:
self.instance.remove_container(container, **kwargs)
self.is_refresh_containers = True
self.is_refresh_running = True
if truncate_output:
yield "{:.25}".format(container)
else:
yield container
except APIError as ex:
yield '{0:.25}: {1}'.format(container, ex.explanation)
return stream()
def rmi(self, *args, **kwargs):
"""
Remove an image. Equivalent of docker rm.
:param kwargs:
:return: Image name.
"""
truncate_output = False
if 'all_dangling' in kwargs and kwargs['all_dangling']:
if args and len(args) > 0:
return ['Provide either --all-dangling, or image name(s).']
images = self.instance.images(
quiet=True,
filters={'dangling': True})
if not images or len(images) == 0:
return ['There are no dangling images.']
truncate_output = True
else:
images = args
kwargs = allowed_args('rmi', **kwargs)
def stream():
for image in images:
try:
self.instance.remove_image(image, **kwargs)
self.is_refresh_images = True
if truncate_output:
yield "{:.25}".format(image)
else:
yield image
except APIError as ex:
yield '{0:.25}: {1}'.format(image, ex.explanation)
return stream()
def run(self, *args, **kwargs):
"""
Create and start a container. Equivalent of docker run.
:param kwargs:
:return: Container ID or iterable output.
"""
if not args:
return ['Image name is required.']
if kwargs['remove'] and kwargs['detach']:
return ['Use either --rm or --detach.']
called, args, kwargs = self.call_external_cli('run', *args, **kwargs)
if not called:
kwargs['image'] = args[0]
kwargs['command'] = args[1:] if len(args) > 1 else []
kwargs = self._add_port_bindings(kwargs)
kwargs = self._add_exposed_ports(kwargs)
kwargs = self._add_link_bindings(kwargs)
kwargs = self._add_volumes_from(kwargs)
kwargs = self._add_volumes(kwargs)
create_args = allowed_args('create', **kwargs)
result = self.instance.create_container(**create_args)
if result:
if "Warnings" in result and result['Warnings']:
return [result['Warnings']]
if "Id" in result and result['Id']:
self.is_refresh_containers = True
is_attach = 'detach' not in kwargs or not kwargs['detach']
start_args = allowed_args('start', **kwargs)
start_args.update({
'container': result['Id'],
'attach': is_attach
})
return self.start(**start_args)
return ['There was a problem running the container.']
def create(self, *args, **kwargs):
"""
Create a container. Equivalent of docker create.
:param kwargs:
:return: Container ID or iterable output.
"""
if not args:
return ['Image name is required.']
called, args, kwargs = self.call_external_cli('create', *args, **kwargs)
if not called:
kwargs['image'] = args[0]
kwargs['command'] = args[1:] if len(args) > 1 else []
# TODO
def restart(self, *args, **kwargs):
"""
Restart a running container. Equivalent of docker restart.
:param kwargs:
:return: Container ID or iterable output.
"""
if not args:
return ['Container name is required.']
def stream():
for container in args:
self.instance.restart(container, **kwargs)
yield container
return stream()
def tag(self, *args, **kwargs):
"""
Tag an image into repository. Equivalent of docker tag.
:param kwargs:
:return: Iamge ID.
"""
if not args or len(args) < 2:
return ['Image name and repository name are required.']
img = args[0]
if ':' in args[1]:
repo, tag = args[1].rsplit(':', 1)
else:
repo, tag = args[1], None
result = self.instance.tag(
image=img, repository=repo, tag=tag, **kwargs)
if result:
return ['Tagged {0} into {1}.'.format(*args)]
else:
return ['Error tagging {0} into {1}.'.format(*args)]
def _add_volumes(self, params):
"""
Update kwargs if volumes are present.
:param params: dict
:return dict
"""
if 'volumes' in params and params['volumes']:
binds = parse_volume_bindings(params['volumes'])
params['volumes'] = [x['bind'] for x in binds.values()]
conf = create_host_config(binds=binds)
self._update_host_config(params, conf)
return params
def _add_volumes_from(self, params):
"""
Update kwargs if volumes-from are present.
:param params: dict
:return dict
"""
if 'volumes_from' in params and params['volumes_from']:
cs = ','.join(params['volumes_from'])
cs = [x.strip() for x in cs.split(',') if x]
conf = create_host_config(volumes_from=cs)
self._update_host_config(params, conf)
return params
def _add_link_bindings(self, params):
"""
Update kwargs if user wants to link containers.
:param params: dict
:return dict
"""
if 'links' in params and params['links']:
links = {}
for link in params['links']:
link_name, link_alias = link.split(':', 1)
links[link_name] = link_alias
link_conf = create_host_config(links=links)
self._update_host_config(params, link_conf)
return params
def _add_port_bindings(self, params):
"""
Update kwargs if user wants to bind some ports.
:param params: dict
:return dict
"""
if 'port_bindings' in params and params['port_bindings']:
port_bindings = parse_port_bindings(params['port_bindings'])
# Have to provide list of ports to open in create_container.
params['ports'] = port_bindings.keys()
# Have to provide host config with port mappings.
port_conf = create_host_config(port_bindings=port_bindings)
self._update_host_config(params, port_conf)
return params
def _add_exposed_ports(self, params):
"""
Update kwargs if user wants to expose some ports.
:param params: dict
:return dict
"""
if 'expose' in params and params['expose']:
ports = parse_exposed_ports(params['expose'])
# Have to provide list of ports to open in create_container.
params['ports'] = ports.keys()
# Have to provide host config with port mappings.
port_conf = create_host_config(port_bindings=ports)
self._update_host_config(params, port_conf)
return params
def _update_host_config(self, params, config_to_merge):
"""
Update config dictionary in kwargs with another dictionary.
:param params: dict
:param config_to_merge: dict with new values
:return dict
"""
if 'host_config' in params and params['host_config']:
params['host_config'].update(config_to_merge)
else:
params['host_config'] = config_to_merge
return params
def _is_repo_tag_valid(self, repo):
"""
When an image is tagged into a repo, make sure only allowed symbols
are used.
:param repo:
:return: (boolean, "error message")
"""
# Username: only [a-z0-9_] are allowed, size between 4 and 30
if '/' not in repo:
return False, 'Format: user_name/repository_name[:tag].'
user_name, repo_name = repo.split('/')
user_pattern = re.compile(r'^[a-z0-9_]{4,30}$')
if not user_pattern.match(user_name):
return False, 'Only [a-z0-9_] are allowed in user name, ' \
'size between 4 and 30'
return True, None
def execute(self, *args, **kwargs):
"""
Execute a command in the container. Equivalent of docker exec.
:param kwargs:
:return: Container ID or iterable output.
"""
if not args or len(args) < 2:
return ['Container ID and command is required.']
called, args, kwargs = self.call_external_cli('exec', *args, **kwargs)
if not called:
kwargs['container'] = args[0]
kwargs['cmd'] = args[1:]
is_detach = kwargs.pop('detach')
exec_args = allowed_args('exec', **kwargs)
result = self.instance.exec_create(**exec_args)
if result and 'Id' in result:
return self.instance.exec_start(
result['Id'],
detach=is_detach,
stream=True)
return ['There was a problem executing the command.']
def build(self, *args, **kwargs):
"""
Build an image. Equivalent of docker build.
:param kwargs:
:return: Iterable output.
"""
if not args:
return ['Directory path or URL is required.']
kwargs['path'] = args[0]
kwargs['rm'] = bool(kwargs['rm'])
self.is_refresh_images = True
return self.instance.build(**kwargs)
def shell(self, *args, **_):
"""
Get the shell into a running container. A shortcut for
docker exec -it /usr/bin/env bash.
:param kwargs:
:return: None
"""
if not args:
return ['Container name or ID is required.']
container = args[0]
shellcmd = 'bash'
if len(args) > 1:
shellcmd = ' '.join(args[1:])
self.after = lambda: ['\rShell to {0} is closed.'.format(container)]
command = 'docker exec -it {0} {1}'.format(container, shellcmd)
process = pexpect.spawnu(command)
process.interact()
def start(self, *args, **kwargs):
"""
Start a container. Equivalent of docker start.
:param kwargs:
:return: Container ID or iterable output.
"""
if args:
kwargs['container'] = args[0]
if not kwargs['container']:
return ['Container name is required.']
called, args, kwargs = self.call_external_cli('start', *args, **kwargs)
if not called:
if 'remove' in kwargs and kwargs['remove']:
def on_after():
container = kwargs['container']
try:
self.instance.stop(container)
self.instance.remove_container(container)
yield "Removed container {0:.25} on exit.".format(
container)
except APIError as ex:
yield "{0:.25}: {1}.".format(container, ex.explanation)
self.is_refresh_containers = True
self.is_refresh_running = True
self.after = on_after
startargs = allowed_args('start', **kwargs)
attached = None
if 'attach' in kwargs and kwargs['attach']:
attached = self.view(
container=kwargs['container'],
stream=True,
stdout=True,
stderr=False,
logs=False)
result = self.instance.start(**startargs)
# Just in case the stream generated no output, let's allow for
# retrieving the logs. They will be our last resort output.
self.logs = lambda: self.instance.logs(kwargs['container'])
self.is_refresh_running = True
if result:
return [result]
elif attached:
return attached
else:
return [kwargs['container']]
def view(self, *_, **kwargs):
"""
Attach to container STDOUT and / or STDERR.
Docker-py does not allow attaching to STDIN.
:param kwargs:
:return: Iterable output
"""
result = self.instance.attach(**kwargs)
return result
def login(self, *args, **kwargs):
"""
Register or log in to a Docker registry server.
:param kwargs:
:return: None
"""
self.after = lambda: ['\r']
command = format_command_line('login', False, args, kwargs)
process = pexpect.spawnu(command)
process.interact()
def logs(self, *args, **kwargs):
"""
Retrieve container logs. Equivalent of docker logs.
:param kwargs:
:return: Iterable output
"""
if not args:
return ['Container ID/name is required.']
kwargs['container'] = args[0]
result = self.instance.logs(**kwargs)
if not kwargs['stream']:
result = [result]
return result
def images(self, *_, **kwargs):
"""
Return the list of images. Equivalent of docker images.
:return: list of dicts
"""
result = self.instance.images(**kwargs)
re_digits = re.compile('^[0-9]+$', re.UNICODE)
def convert_image_dict(a):
"""
Drop some keys and change some values to pretty-print image dict.
"""
b = {}
for k, v in a.items():
if k not in ['RepoTags', 'RepoDigests', 'Labels', 'Size']:
b[k] = v
if k == 'Created' and v and re_digits.search(str(v)):
b[k] = pretty.date(v)
if k == 'VirtualSize':
b[k] = filesize(v)
# If we have more than one repo tag, return as many dicts
for rt in a['RepoTags']:
repo, tag = rt.rsplit(':', 1)
c = {}
c.update(b)
c['Repository'] = repo
c['Tag'] = tag
yield c
if len(result) > 0:
if isinstance(result[0], dict):
converted = []
for x in result:
for y in convert_image_dict(x):
converted.append(y)
return converted
return result
else:
return ['There are no images to list.']
def search(self, *args, **_):
"""
Return the list of images matching specified term.
Equivalent of docker search.
:return: list of dicts
"""
if not args or len(args) < 1:
return "Search term is required."
result = self.instance.search(args[0])
if len(result) > 0:
for res in result:
# Make results more readable, like official CLI does.
if 'is_trusted' in res:
res['is_trusted'] = '[OK]' if res['is_trusted'] else ''
if 'is_official' in res:
res['is_official'] = '[OK]' if res['is_official'] else ''
return result
else:
return ['No images were found.']
def stop(self, *args, **kwargs):
"""
Stop a running container. Equivalent of docker stop.
:param kwargs:
:return: Container ID or iterable output.
"""
if not args:
return ['Container name is required.']
container = args[0]
self.instance.stop(container, **kwargs)
self.is_refresh_running = True
return [container]
def top(self, *args, **kwargs):
"""
Show top processes in a container. Equivalent of docker rm.
:param kwargs:
:return: Container ID or iterable output.
"""
if not args:
return ['Container name is required.']
container = args[0]
result = self.instance.top(container, **kwargs)
return result
def pull(self, *args, **kwargs):
"""
Pull an image by name. Equivalent of docker pull.
:param kwargs:
:return: Container ID or iterable output.
"""
if not args:
return ['Image name is required.']
image = args[0]
kwargs['stream'] = True
result = self.instance.pull(image, **kwargs)
self.is_refresh_images = True
return result
def push(self, *args, **kwargs):
"""
Push an image into repository. Equivalent of docker push.
:param kwargs:
:return: interactive.
"""
if not args or len(args) < 1:
return ['Image name (tagged) is required.']
tag_valid, tag_message = self._is_repo_tag_valid(args[0])
if not tag_valid:
return [tag_message]
self.after = lambda: ['\r']
# TODO: this command didn't have to use pexpect.
# But it was easier to call the official CLI than try and figure out
# why requests throw this error:
# File "venv/dockercli/lib/python2.7/site-packages/requests/packages/
# urllib3/response.py", line 267, in read
# raise ReadTimeoutError(self._pool, None, 'Read timed out.')
# requests.packages.urllib3.exceptions.ReadTimeoutError:
# HTTPSConnectionPool(host='192.168.59.103', port=2376): Read timed out.
command = format_command_line('push', False, args, kwargs)
process = pexpect.spawnu(command)
process.interact()
def unpause(self, *args, **kwargs):
"""
Unpause all processes in a container. Equivalent of docker unpause.
:param kwargs:
:return: Container ID or iterable output.
"""
if not args:
return ['Container name is required.']
kwargs['container'] = args[0]
self.instance.unpause(**kwargs)
return [kwargs['container']]
def call_external_cli(self, cmd, *args, **kwargs):
"""
Call the "officia" CLI if needed.
:param args:
:param kwargs:
:return:
"""
called = False
is_interactive = kwargs.get('interactive', None)
is_tty = kwargs.get('tty', None)
is_attach = kwargs.get('attach', None)
is_attach_bool = is_attach in [True, False]
def execute_external():
"""
Call the official cli
"""
command = format_command_line(cmd, False, args, kwargs)
process = pexpect.spawnu(command)
process.interact()
def on_after_interactive():
# \r is to make sure when there is some error output,
# prompt is back to beginning of line
self.is_refresh_containers = True
self.is_refresh_running = True
return ['\rInteractive terminal is closed.']
def on_after_attach():
self.is_refresh_containers = True
self.is_refresh_running = True
return ['Container exited.\r']
if is_interactive or is_tty or (is_attach and not is_attach_bool):
self.after = on_after_attach if is_attach else on_after_interactive
called = True
execute_external()
return called, args, kwargs
class DockerClient(object):
"""
This client is a "translator" between docker-py API and
the standard docker command line. We need one because docker-py
does not use the same naming for command names and their parameters.
For example, "docker ps" is named "containers", "-n" parameter
is named "limit", some parameters are not implemented at all, etc.
"""
def __init__(self,
timeout=None,
clear_handler=None,
refresh_handler=None,
logger=None):
"""
Initialize the Docker wrapper.
:param timeout: int
:param clear_handler: callable
:param refresh_handler: callable
:param logger: logger
"""
assert callable(clear_handler)
assert callable(refresh_handler)
self.logger = logger
self.exception = None
self.handlers = {
'attach': (self.attach, 'Attach to a running container.'),
'build': (self.build, ("Build a new image from the source"
" code")),
'clear': (clear_handler, "Clear the window."),
'create': (self.create, 'Create a new container.'),
'exec': (self.execute, ("Run a command in a running"
" container.")),
'help': (self.help, "Help on available commands."),
'pause': (self.pause, "Pause all processes within a container."),
'ps': (self.containers, "List containers."),
'port': (self.port, ("List port mappings for the container, or "
"lookup the public-facing port that is "
"NAT-ed to the private_port.")),
'pull': (self.pull, ("Pull an image or a repository from the "
"registry.")),
'push': (self.push, ("Push an image or a repository to the "
"registry.")),
'images': (self.images, "List images."),
'info': (self.info, "Display system-wide information."),
'inspect':
(self.inspect,
"Return low-level information on a " + "container or image."),
'kill': (self.kill, "Kill one or more running containers"),
'login': (self.login, ("Register or log in to a Docker registry "
"server (defaut "
"\"https://index.docker.io/v1/\").")),
'logs': (self.logs, "Fetch the logs of a container."),
'refresh': (refresh_handler, "Refresh autocompletions."),
'rename': (self.rename, "Rename a container."),
'restart': (self.restart, "Restart a running container."),
'run': (self.run, "Run a command in a new container."),
'rm': (self.rm, "Remove one or more containers."),
'rmi': (self.rmi, "Remove one or more images."),
'search': (self.search, "Search the Docker Hub for images."),
'shell': (self.shell, "Get shell into a running container."),
'start': (self.start, "Restart a stopped container."),
'stop': (self.stop, "Stop a running container."),
'tag': (self.tag, "Tag an image into a repository."),
'top': (self.top, "Display the running processes of a container."),
'unpause': (self.unpause, ("Unpause all processes within a "
"container.")),
'version': (self.version, "Show the Docker version information."),
'volume create': (self.volume_create, "Create a new volume."),
'volume inspect': (self.volume_inspect, "Inspect one or more "
"volumes."),
'volume ls': (self.volume_ls, "List volumes."),
'volume rm': (self.volume_rm, "Remove a volume."),
}
self.output = None
self.after = None
self.command = None
self.log = None
self.is_refresh_containers = False
self.is_refresh_running = False
self.is_refresh_images = False
self.is_refresh_volumes = False
disable_warnings()
if sys.platform.startswith('darwin') \
or sys.platform.startswith('win32'):
try:
# mac or win
kwargs = kwargs_from_env()
# hack from here:
# http://docker-py.readthedocs.org/en/latest/boot2docker/
# See also: https://github.com/docker/docker-py/issues/406
if 'tls' in kwargs:
kwargs['tls'].assert_hostname = False
kwargs['timeout'] = timeout
self.instance = AutoVersionClient(**kwargs)
except DockerException as x:
if 'CERTIFICATE_VERIFY_FAILED' in str(x):
raise DockerSslException(x)
elif 'ConnectTimeoutError' in str(x):
raise DockerTimeoutException(x)
else:
raise x
else:
# unix-based
kwargs = kwargs_from_env(ssl_version=ssl.PROTOCOL_TLSv1,
assert_hostname=False)
kwargs['timeout'] = timeout
self.instance = AutoVersionClient(**kwargs)
def debug(self, message):
"""Log a debug message if logger is passed in."""
if self.logger is not None:
self.logger.debug(message)
def handle_input(self, text):
"""
Parse the command, run it via the client, and return
some iterable output to print out. This will parse options
and arguments out of the command line and into parameters
consistent with docker-py naming. It is designed to be the
only really public method of the client. Other methods
are just pass-through methods that delegate commands
to docker-py.
:param text: user input
:return: iterable
"""
def reset_output():
""" Set all internals to initial state."""
self.command = None
self.is_refresh_containers = False
self.is_refresh_running = False
self.is_refresh_images = False
self.is_refresh_volumes = False
self.after = None
self.log = None
self.exception = None
tokens = shlex_split(text) if text else ['']
cmd, params = split_command_and_args(tokens)
reset_output()
if cmd and cmd in self.handlers:
handler = self.handlers[cmd][0]
self.command = cmd
if params:
try:
if '-h' in tokens or '--help' in tokens:
self.output = [format_command_help(cmd)]
else:
parser, popts, pargs = parse_command_options(
cmd, params)
if 'help' in popts:
del popts['help']
self.output = handler(*pargs, **popts)
except APIError as ex:
reset_output()
self.output = [str(ex.explanation)]
except OptionError as ex:
reset_output()
raise ex
except Exception as ex:
reset_output()
self.output = [ex.__repr__()]
else:
self.output = handler()
elif cmd:
self.output = self.help()
def attach(self, *args, **kwargs):
"""
Attach to a running container.
:param kwargs:
:return: None
"""
if not args:
return ['Container name or ID is required.']
container = args[0]
def on_after():
self.is_refresh_containers = True
self.is_refresh_running = True
return ['\rDetached from {0}.'.format(container)]
self.after = on_after
command = format_command_line('attach', False, args, kwargs)
process = pexpect.spawnu(command)
process.interact()
def help(self, *_):
"""
Collect and return help docstrings for all commands.
:return: list of tuples
"""
help_rows = [(key, self.handlers[key][1]) for key in COMMAND_NAMES]
return help_rows
def not_implemented(self, *_, **kw):
"""
Placeholder for commands to be implemented.
:return: iterable
"""
return ['Not implemented.']
def version(self, *_):
"""
Return the version. Equivalent of docker version.
:return: list of tuples
"""
try:
verdict = self.instance.version()
result = [(k, verdict[k]) for k in sorted(verdict.keys())]
return result
except ConnectionError as ex:
raise DockerPermissionException(ex)
def info(self, *_):
"""
Return the system info. Equivalent of docker info.
:return: list of tuples
"""
rdict = self.instance.info()
result = [(k, rdict[k]) for k in sorted(rdict.keys())]
return result
def inspect(self, *args, **_):
"""
Return image or container info. Equivalent of docker inspect.
:return: dict
"""
if not args or len(args) == 0:
yield 'Container or image ID is required.'
cids, cnames, imids, imnames = set(), set(), set(), set()
cs = self.containers(all=True)
if cs and len(cs) > 0 and isinstance(cs[0], dict):
cids = set([c['Id'] for c in cs])
cnames = set([name for c in cs for name in c['Names']])
ims = self.images(all=True)
if ims and len(ims) > 0 and isinstance(ims[0], dict):
imids = set([i['Id'] for i in ims])
imnames = set([i['Repository'] for i in ims])
for name in args:
if name in cids or name in cnames:
info = self.instance.inspect_container(name)
elif name in imids or name in imnames:
info = self.instance.inspect_image(name)
else:
info = 'Container or image ID is required.'
yield info
def containers(self, *_, **kwargs):
"""
Return the list of containers. Equivalent of docker ps.
:return: list of dicts
"""
# Truncate by default.
if 'trunc' in kwargs and kwargs['trunc'] is None:
kwargs['trunc'] = True
def format_names(names):
"""
Container names start with /.
Let's strip this for readability.
"""
if isinstance(names, list):
formatted = []
for name in names:
if isinstance(name, six.string_types):
formatted.append(name.lstrip('/'))
else:
formatted.append(name)
return formatted
return names
csdict = self.instance.containers(**kwargs)
if len(csdict) > 0:
if 'quiet' not in kwargs or not kwargs['quiet']:
for i in range(len(csdict)):
csdict[i]['Names'] = format_names(csdict[i]['Names'])
csdict[i]['Created'] = pretty.date(csdict[i]['Created'])
return csdict
else:
return ['There are no containers to list.']
def pause(self, *args, **kwargs):
"""
Pause all processes in a container. Equivalent of docker pause.
:param kwargs:
:return: Container ID or iterable output.
"""
if not args:
return ['Container name is required.']
kwargs['container'] = args[0]
self.instance.pause(**kwargs)
return [kwargs['container']]
def port(self, *args, **_):
"""
List port mappings for the container. Equivalent of docker port.
:param kwargs:
:return: Container ID or iterable output.
"""
if not args:
return ['Container name is required.']
port_args = [args[0], None]
port_args[1] = args[1] if len(args) > 1 else None
result = self.instance.port(*port_args)
if result:
return result
result = self.instance.inspect_container(port_args[0])
if result:
result = result.get('NetworkSettings', {}).get('Ports', None)
if result:
return result
return ['There are no port mappings for {0}.'.format(args[0])]
def rm(self, *args, **kwargs):
"""
Remove a container. Equivalent of docker rm.
:param kwargs:
:return: Container ID or iterable output.
"""
truncate_output = False
all_stopped = 'all_stopped' in kwargs and kwargs['all_stopped']
all = 'all' in kwargs and kwargs['all']
if all_stopped:
if args and len(args) > 0:
return ['Provide either --all-stopped, or container name(s).']
containers = self.instance.containers(quiet=True,
filters={'status': 'exited'})
if not containers or len(containers) == 0:
return ['There are no stopped containers.']
containers = [c['Id'] for c in containers]
truncate_output = True
elif all:
if args and len(args) > 0:
return ['Provide either --all, or container name(s).']
containers = self.instance.containers(quiet=True, all=True)
if not containers or len(containers) == 0:
return ['There are no containers.']
containers = [c['Id'] for c in containers]
truncate_output = True
else:
containers = args
kwargs = allowed_args('rm', **kwargs)
def stream():
for container in containers:
try:
self.instance.remove_container(container, **kwargs)
self.is_refresh_containers = True
self.is_refresh_running = True
if truncate_output:
yield "{0:.25}".format(container)
else:
yield container
except APIError as ex:
yield '{0:.25}: {1}'.format(container, ex.explanation)
yield 'Removed: {0} container(s).'.format(
len(containers) if containers else 0)
return stream()
def rmi(self, *args, **kwargs):
"""
Remove an image. Equivalent of docker rm.
:param kwargs:
:return: Image name.
"""
truncate_output = False
all_dangling = 'all_dangling' in kwargs and kwargs['all_dangling']
all = 'all' in kwargs and kwargs['all']
if all_dangling:
if args and len(args) > 0:
return ['Provide either --all-dangling, or image name(s).']
images = self.instance.images(quiet=True,
filters={'dangling': True})
if not images or len(images) == 0:
return ['There are no dangling images.']
truncate_output = True
elif all:
if args and len(args) > 0:
return ['Provide either --all, or image name(s).']
images = self.instance.images(quiet=True, all=True)
if not images or len(images) == 0:
return ['There are no images.']
truncate_output = True
else:
images = args
kwargs = allowed_args('rmi', **kwargs)
def stream():
for image in images:
try:
self.instance.remove_image(image, **kwargs)
self.is_refresh_images = True
if truncate_output:
yield "{:.25}".format(image)
else:
yield image
except APIError as ex:
yield '{0:.25}: {1}'.format(image, ex.explanation)
return stream()
def run(self, *args, **kwargs):
"""
Create and start a container. Equivalent of docker run.
:param kwargs:
:return: Container ID or iterable output.
"""
if not args:
return ['Image name is required.']
if kwargs['remove'] and kwargs['detach']:
return ['Use either --rm or --detach.']
# Always call external cli for this, rather than figuring out
# why docker-py throws "jack is incompatible with use of CloseNotifier in same ServeHTTP call"
kwargs['force'] = True
called, args, kwargs = self.call_external_cli('run', *args, **kwargs)
if not called:
kwargs['image'] = args[0]
kwargs['command'] = args[1:] if len(args) > 1 else []
kwargs = self._add_port_bindings(kwargs)
kwargs = self._add_exposed_ports(kwargs)
kwargs = self._add_link_bindings(kwargs)
kwargs = self._add_volumes_from(kwargs)
kwargs = self._add_volumes(kwargs)
kwargs = self._add_network_mode(kwargs)
create_args = allowed_args('create', **kwargs)
result = self.instance.create_container(**create_args)
if result:
if "Warnings" in result and result['Warnings']:
return [result['Warnings']]
if "Id" in result and result['Id']:
self.is_refresh_containers = True
is_attach = 'detach' not in kwargs or not kwargs['detach']
start_args = allowed_args('start', **kwargs)
start_args.update({
'container': result['Id'],
'attach': is_attach
})
return self.start(**start_args)
return ['There was a problem running the container.']
def create(self, *args, **kwargs):
"""
Create a container. Equivalent of docker create.
:param kwargs:
:return: Container ID or iterable output.
"""
if not args:
return ['Image name is required.']
called, args, kwargs = self.call_external_cli('create', *args,
**kwargs)
if not called:
kwargs['image'] = args[0]
kwargs['command'] = args[1:] if len(args) > 1 else []
kwargs = self._add_port_bindings(kwargs)
kwargs = self._add_exposed_ports(kwargs)
kwargs = self._add_link_bindings(kwargs)
kwargs = self._add_volumes_from(kwargs)
kwargs = self._add_volumes(kwargs)
kwargs = self._add_network_mode(kwargs)
create_args = allowed_args('create', **kwargs)
result = self.instance.create_container(**create_args)
if result:
if "Warnings" in result and result['Warnings']:
return [result['Warnings']]
if "Id" in result and result['Id']:
self.is_refresh_containers = True
return [result['Id']]
return ['There was a problem creating the container.']
def rename(self, *args, **kwargs):
"""
Rename a container. Equivalent of docker rename.
:param kwargs:
:return: None.
"""
if not args or len(args) < 2:
return ['Container name and new name are required.']
self.instance.rename(*args)
self.is_refresh_containers = True
def restart(self, *args, **kwargs):
"""
Restart a running container. Equivalent of docker restart.
:param kwargs:
:return: Container ID or iterable output.
"""
if not args:
return ['Container name is required.']
def stream():
for container in args:
self.instance.restart(container, **kwargs)
yield container
return stream()
@if_exception_return(InvalidVersion, None)
def volume_create(self, *args, **kwargs):
"""
Create a volume. Equivalent of docker volume create.
:param kwargs:
:return: Volume name.
"""
if not kwargs:
return ['Volume name is required.']
allowed = allowed_args('volume create', **kwargs)
allowed = self._add_opts(allowed)
result = self.instance.create_volume(**allowed)
self.is_refresh_volumes = True
return [result['Name']]
@if_exception_return(InvalidVersion, None)
def volume_ls(self, *args, **kwargs):
"""
List volumes. Equivalent of docker volume ls.
:param kwargs:
:return: Iterable.
"""
quiet = kwargs.pop('quiet', False)
kwargs = self._add_filters(kwargs)
vdict = self.instance.volumes(**kwargs)
result = vdict.get('Volumes', None)
if result:
if quiet:
result = [volume['Name'] for volume in result]
return result
else:
return ['There are no volumes to list.']
@if_exception_return(InvalidVersion, None)
def volume_rm(self, *args, **kwargs):
"""
Remove a volume. Equivalent of docker volume rm.
:param kwargs:
:return: Volume name.
"""
if not args:
return ['Volume name is required.']
def stream():
for volume in args:
try:
self.instance.remove_volume(volume)
self.is_refresh_volumes = True
yield volume
except APIError as x:
yield 'Could not remove volume {0}: {1}.'.format(
volume, x.explanation)
return stream()
@if_exception_return(InvalidVersion, None)
def volume_inspect(self, *args, **_):
"""
Return volume info. Equivalent of docker volume ls.
:return: dict
"""
if not args or len(args) == 0:
yield 'Volume name is required.'
vnames = self.volume_ls(quiet=True)
for vname in args:
if vname in vnames:
info = self.instance.inspect_volume(vname)
yield info
else:
yield "Volume not found: {0}".format(vname)
def tag(self, *args, **kwargs):
"""
Tag an image into repository. Equivalent of docker tag.
:param kwargs:
:return: Iamge ID.
"""
if not args or len(args) < 2:
return ['Image name and repository name are required.']
img = args[0]
if ':' in args[1]:
repo, tag = args[1].rsplit(':', 1)
else:
repo, tag = args[1], None
result = self.instance.tag(image=img,
repository=repo,
tag=tag,
**kwargs)
if result:
return ['Tagged {0} into {1}.'.format(*args)]
else:
return ['Error tagging {0} into {1}.'.format(*args)]
def _add_filters(self, params):
"""
Update kwargs if filters are present.
:param params: dict
:return dict
"""
if params.get('filters', None):
filters = parse_kv_as_dict(params['filters'], True)
params['filters'] = filters
return params
def _add_opts(self, params):
"""
Update kwargs if opts are present.
:param params: dict
:return dict
"""
if params.get('driver_opts', None):
opts = parse_kv_as_dict(params['driver_opts'], False)
params['driver_opts'] = opts
return params
def _add_volumes(self, params):
"""
Update kwargs if volumes are present.
:param params: dict
:return dict
"""
if params.get('volumes', None):
binds = parse_volume_bindings(params['volumes'])
params['volumes'] = [x['bind'] for x in binds.values()]
conf = self.instance.create_host_config(binds=binds)
self._update_host_config(params, conf)
return params
def _add_volumes_from(self, params):
"""
Update kwargs if volumes-from are present.
:param params: dict
:return dict
"""
if params.get('volumes_from', None):
cs = ','.join(params['volumes_from'])
cs = [x.strip() for x in cs.split(',') if x]
conf = self.instance.create_host_config(volumes_from=cs)
self._update_host_config(params, conf)
return params
def _add_network_mode(self, params):
"""
Update kwargs if --net is present.
:param params: dict
:return: dict
"""
if 'net' in params:
conf = self.instance.create_host_config(network_mode=params['net'])
self._update_host_config(params, conf)
return params
def _add_link_bindings(self, params):
"""
Update kwargs if user wants to link containers.
:param params: dict
:return dict
"""
if params.get('links', None):
links = {}
for link in params['links']:
link_name, link_alias = link.split(':', 1)
links[link_name] = link_alias
link_conf = self.instance.create_host_config(links=links)
self._update_host_config(params, link_conf)
return params
def _add_port_bindings(self, params):
"""
Update kwargs if user wants to bind some ports.
:param params: dict
:return dict
"""
if params.get('port_bindings', None):
port_bindings = parse_port_bindings(params['port_bindings'])
# Have to provide list of ports to open in create_container.
params['ports'] = port_bindings.keys()
# Have to provide host config with port mappings.
port_conf = self.instance.create_host_config(
port_bindings=port_bindings)
self._update_host_config(params, port_conf)
return params
def _add_exposed_ports(self, params):
"""
Update kwargs if user wants to expose some ports.
:param params: dict
:return dict
"""
if params.get('expose', None):
ports = parse_exposed_ports(params['expose'])
# Have to provide list of ports to open in create_container.
params['ports'] = ports.keys()
# Have to provide host config with port mappings.
port_conf = self.instance.create_host_config(port_bindings=ports)
self._update_host_config(params, port_conf)
return params
def _update_host_config(self, params, config_to_merge):
"""
Update config dictionary in kwargs with another dictionary.
:param params: dict
:param config_to_merge: dict with new values
:return dict
"""
if params.get('host_config', None):
params['host_config'].update(config_to_merge)
else:
params['host_config'] = config_to_merge
return params
def _is_repo_tag_valid(self, repo):
"""
When an image is tagged into a repo, make sure only allowed symbols
are used.
:param repo:
:return: (boolean, "error message")
"""
# Username: only [a-z0-9_] are allowed, size between 4 and 30
if '/' not in repo:
return False, 'Format: user_name/repository_name[:tag].'
user_name, repo_name = repo.split('/')
user_pattern = re.compile(r'^[a-z0-9_]{4,30}$')
if not user_pattern.match(user_name):
return False, 'Only [a-z0-9_] are allowed in user name, ' \
'size between 4 and 30'
return True, None
def execute(self, *args, **kwargs):
"""
Execute a command in the container. Equivalent of docker exec.
:param kwargs:
:return: Container ID or iterable output.
"""
if not args or len(args) < 2:
return ['Container ID and command is required.']
called, args, kwargs = self.call_external_cli('exec', *args, **kwargs)
if not called:
kwargs['container'] = args[0]
kwargs['cmd'] = args[1:]
is_detach = kwargs.pop('detach')
exec_args = allowed_args('exec', **kwargs)
result = self.instance.exec_create(**exec_args)
if result and 'Id' in result:
return self.instance.exec_start(result['Id'],
detach=is_detach,
stream=True)
return ['There was a problem executing the command.']
def build(self, *args, **kwargs):
"""
Build an image. Equivalent of docker build.
:param kwargs:
:return: Iterable output.
"""
if not args:
return ['Directory path or URL is required.']
kwargs['path'] = args[0]
kwargs['rm'] = bool(kwargs['rm'])
self.is_refresh_images = True
return self.instance.build(**kwargs)
def shell(self, *args, **_):
"""
Get the shell into a running container. A shortcut for
docker exec -it /usr/bin/env bash.
:param kwargs:
:return: None
"""
if not args:
return ['Container name or ID is required.']
container = args[0]
shellcmd = 'bash'
if len(args) > 1:
shellcmd = ' '.join(args[1:])
self.after = lambda: ['\rShell to {0} is closed.'.format(container)]
command = 'docker exec -it {0} {1}'.format(container, shellcmd)
process = pexpect.spawnu(command)
process.interact()
def start(self, *args, **kwargs):
"""
Start a container. Equivalent of docker start.
:param kwargs:
:return: Container ID or iterable output.
"""
if args:
kwargs['container'] = args[0]
if not kwargs['container']:
return ['Container name is required.']
called, args, kwargs = self.call_external_cli('start', *args, **kwargs)
if not called:
if 'remove' in kwargs and kwargs['remove']:
def on_after():
container = kwargs['container']
try:
self.instance.stop(container)
self.instance.remove_container(container)
yield "Removed container {0:.25} on exit.".format(
container)
except APIError as ex:
yield "{0:.25}: {1}.".format(container, ex.explanation)
self.is_refresh_containers = True
self.is_refresh_running = True
self.after = on_after
startargs = allowed_args('start', **kwargs)
attached = None
if 'attach' in kwargs and kwargs['attach']:
attached = self.view(container=kwargs['container'],
stream=True,
stdout=True,
stderr=False,
logs=False)
result = self.instance.start(**startargs)
# Just in case the stream generated no output, let's allow for
# retrieving the logs. They will be our last resort output.
self.log = lambda: self.instance.logs(kwargs['container'])
self.is_refresh_running = True
if result:
return [result]
elif attached:
return attached
else:
return [kwargs['container']]
def view(self, *_, **kwargs):
"""
Attach to container STDOUT and / or STDERR.
Docker-py does not allow attaching to STDIN.
:param kwargs:
:return: Iterable output
"""
result = self.instance.attach(**kwargs)
return result
def login(self, *args, **kwargs):
"""
Register or log in to a Docker registry server.
:param kwargs:
:return: None
"""
self.after = lambda: ['\r']
command = format_command_line('login', False, args, kwargs)
process = pexpect.spawnu(command)
process.interact()
def logs(self, *args, **kwargs):
"""
Retrieve container logs. Equivalent of docker logs.
:param kwargs:
:return: Iterable output
"""
if not args:
return ['Container ID/name is required.']
kwargs['container'] = args[0]
result = self.instance.logs(**kwargs)
if isinstance(result, bytes):
result = result.decode()
if not kwargs['stream']:
result = [result]
return result
def images(self, *_, **kwargs):
"""
Return the list of images. Equivalent of docker images.
:return: list of dicts
"""
result = self.instance.images(**kwargs)
re_digits = re.compile('^[0-9]+$', re.UNICODE)
def convert_image_dict(a):
"""
Drop some keys and change some values to pretty-print image dict.
"""
b = {}
for k, v in a.items():
if k not in ['RepoTags', 'RepoDigests', 'Labels', 'Size']:
b[k] = v
if k == 'Created' and v and re_digits.search(str(v)):
b[k] = pretty.date(v)
if k == 'VirtualSize':
b[k] = filesize(v)
# If we have more than one repo tag, return as many dicts
if a.get('RepoTags', None) is None:
a['RepoTags'] = ['<none>:<none>']
for rt in a['RepoTags']:
repo, tag = rt.rsplit(':', 1)
c = {}
c.update(b)
c['Repository'] = repo
c['Tag'] = tag
yield c
if len(result) > 0:
if isinstance(result[0], dict):
converted = []
for x in result:
for y in convert_image_dict(x):
converted.append(y)
return converted
return result
else:
return ['There are no images to list.']
def search(self, *args, **_):
"""
Return the list of images matching specified term.
Equivalent of docker search.
:return: list of dicts
"""
if not args or len(args) < 1:
return "Search term is required."
result = self.instance.search(args[0])
if len(result) > 0:
for res in result:
# Make results more readable, like official CLI does.
if 'is_trusted' in res:
res['is_trusted'] = '[OK]' if res['is_trusted'] else ''
if 'is_official' in res:
res['is_official'] = '[OK]' if res['is_official'] else ''
return result
else:
return ['No images were found.']
def stop(self, *args, **kwargs):
"""
Stop a running container. Equivalent of docker stop.
:param kwargs:
:return: Container ID or iterable output.
"""
if not args:
return ['Container name is required.']
def stream():
for container in args:
try:
self.instance.stop(container, **kwargs)
self.is_refresh_running = True
yield container
except APIError as ex:
yield '{0:.25}: {1}'.format(container, ex.explanation)
return stream()
def kill(self, *args, **kwargs):
"""
Kill a running container. Equivalent of docker kill.
:param kwargs:
:return: Container ID or iterable output.
"""
if not args:
return ['Container name is required.']
def stream():
for container in args:
try:
self.instance.kill(container, **kwargs)
self.is_refresh_running = True
yield container
except APIError as ex:
yield '{0:.25}: {1}'.format(container, ex.explanation)
return stream()
def top(self, *args, **kwargs):
"""
Show top processes in a container. Equivalent of docker rm.
:param kwargs:
:return: Container ID or iterable output.
"""
if not args:
return ['Container name is required.']
container = args[0]
result = self.instance.top(container, **kwargs)
return result
def pull(self, *args, **kwargs):
"""
Pull an image by name. Equivalent of docker pull.
:param kwargs:
:return: Container ID or iterable output.
"""
if not args:
return ['Image name is required.']
image = args[0]
kwargs['stream'] = True
result = self.instance.pull(image, **kwargs)
self.is_refresh_images = True
return result
def push(self, *args, **kwargs):
"""
Push an image into repository. Equivalent of docker push.
:param kwargs:
:return: interactive.
"""
if not args or len(args) < 1:
return ['Image name (tagged) is required.']
tag_valid, tag_message = self._is_repo_tag_valid(args[0])
if not tag_valid:
return [tag_message]
self.after = lambda: ['\r']
# TODO: this command didn't have to use pexpect.
# But it was easier to call the official CLI than try and figure out
# why requests throw this error:
# File "venv/wharfee/lib/python2.7/site-packages/requests/packages/
# urllib3/response.py", line 267, in read
# raise ReadTimeoutError(self._pool, None, 'Read timed out.')
# requests.packages.urllib3.exceptions.ReadTimeoutError:
# HTTPSConnectionPool(host='192.168.59.103', port=2376): Read timed out.
command = format_command_line('push', False, args, kwargs)
process = pexpect.spawnu(command)
process.interact()
def unpause(self, *args, **kwargs):
"""
Unpause all processes in a container. Equivalent of docker unpause.
:param kwargs:
:return: Container ID or iterable output.
"""
if not args:
return ['Container name is required.']
kwargs['container'] = args[0]
self.instance.unpause(**kwargs)
return [kwargs['container']]
def call_external_cli(self, cmd, *args, **kwargs):
"""
Call the "official" CLI if needed.
:param args:
:param kwargs:
:return:
"""
called = False
is_force = kwargs.pop('force', False)
is_interactive = kwargs.get('interactive', None)
is_tty = kwargs.get('tty', None)
is_attach = kwargs.get('attach', None)
is_attach_bool = is_attach in [True, False]
def execute_external():
"""
Call the official cli
"""
command = format_command_line(cmd, False, args, kwargs)
process = pexpect.spawnu(command)
process.interact()
def on_after_interactive():
# \r is to make sure when there is some error output,
# prompt is back to beginning of line
self.is_refresh_containers = True
self.is_refresh_running = True
return ['\rInteractive terminal is closed.']
def on_after_attach():
self.is_refresh_containers = True
self.is_refresh_running = True
return ['Container exited.\r']
if is_force or is_interactive or is_tty or (is_attach
and not is_attach_bool):
self.after = on_after_attach if is_attach or (
not is_interactive and not is_tty) else on_after_interactive
called = True
execute_external()
return called, args, kwargs