from datetime import datetime
from .. import errors
from .. import utils
from ..constants import DEFAULT_DATA_CHUNK_SIZE
from ..types import CancellableStream
from ..types import ContainerConfig
from ..types import EndpointConfig
from ..types import HostConfig
from ..types import NetworkingConfig
class ContainerApiMixin:
@utils.check_resource('container')
def attach(self, container, stdout=True, stderr=True,
stream=False, logs=False, demux=False):
"""
Attach to a container.
The ``.logs()`` function is a wrapper around this method, which you can
use instead if you want to fetch/stream container output without first
retrieving the entire backlog.
Args:
container (str): The container to attach to.
stdout (bool): Include stdout.
stderr (bool): Include stderr.
stream (bool): Return container output progressively as an iterator
of strings, rather than a single string.
logs (bool): Include the container's previous output.
demux (bool): Keep stdout and stderr separate.
Returns:
By default, the container's output as a single string (two if
``demux=True``: one for stdout and one for stderr).
If ``stream=True``, an iterator of output strings. If
``demux=True``, two iterators are returned: one for stdout and one
for stderr.
Raises:
:py:class:`docker.errors.APIError`
If the server returns an error.
"""
params = {
'logs': logs and 1 or 0,
'stdout': stdout and 1 or 0,
'stderr': stderr and 1 or 0,
'stream': stream and 1 or 0
}
headers = {
'Connection': 'Upgrade',
'Upgrade': 'tcp'
}
u = self._url("/containers/{0}/attach", container)
response = self._post(u, headers=headers, params=params, stream=True)
output = self._read_from_socket(
response, stream, self._check_is_tty(container), demux=demux)
if stream:
return CancellableStream(output, response)
else:
return output
@utils.check_resource('container')
def attach_socket(self, container, params=None, ws=False):
"""
Like ``attach``, but returns the underlying socket-like object for the
HTTP request.
Args:
container (str): The container to attach to.
params (dict): Dictionary of request parameters (e.g. ``stdout``,
``stderr``, ``stream``).
For ``detachKeys``, ~/.docker/config.json is used by default.
ws (bool): Use websockets instead of raw HTTP.
Raises:
:py:class:`docker.errors.APIError`
If the server returns an error.
"""
if params is None:
params = {
'stdout': 1,
'stderr': 1,
'stream': 1
}
if 'detachKeys' not in params \
and 'detachKeys' in self._general_configs:
params['detachKeys'] = self._general_configs['detachKeys']
if ws:
return self._attach_websocket(container, params)
headers = {
'Connection': 'Upgrade',
'Upgrade': 'tcp'
}
u = self._url("/containers/{0}/attach", container)
return self._get_raw_response_socket(
self.post(
u, None, params=self._attach_params(params), stream=True,
headers=headers
)
)
@utils.check_resource('container')
def commit(self, container, repository=None, tag=None, message=None,
author=None, changes=None, conf=None):
"""
Commit a container to an image. Similar to the ``docker commit``
command.
Args:
container (str): The image hash of the container
repository (str): The repository to push the image to
tag (str): The tag to push
message (str): A commit message
author (str): The name of the author
changes (str): Dockerfile instructions to apply while committing
conf (dict): The configuration for the container. See the
`Engine API documentation
`_
for full details.
Raises:
:py:class:`docker.errors.APIError`
If the server returns an error.
"""
params = {
'container': container,
'repo': repository,
'tag': tag,
'comment': message,
'author': author,
'changes': changes
}
u = self._url("/commit")
return self._result(
self._post_json(u, data=conf, params=params), json=True
)
def containers(self, quiet=False, all=False, trunc=False, latest=False,
since=None, before=None, limit=-1, size=False,
filters=None):
"""
List containers. Similar to the ``docker ps`` command.
Args:
quiet (bool): Only display numeric Ids
all (bool): Show all containers. Only running containers are shown
by default
trunc (bool): Truncate output
latest (bool): Show only the latest created container, include
non-running ones.
since (str): Show only containers created since Id or Name, include
non-running ones
before (str): Show only container created before Id or Name,
include non-running ones
limit (int): Show `limit` last created containers, include
non-running ones
size (bool): Display sizes
filters (dict): Filters to be processed on the image list.
Available filters:
- `exited` (int): Only containers with specified exit code
- `status` (str): One of ``restarting``, ``running``,
``paused``, ``exited``
- `label` (str|list): format either ``"key"``, ``"key=value"``
or a list of such.
- `id` (str): The id of the container.
- `name` (str): The name of the container.
- `ancestor` (str): Filter by container ancestor. Format of
``[:tag]``, ````, or
````.
- `before` (str): Only containers created before a particular
container. Give the container name or id.
- `since` (str): Only containers created after a particular
container. Give container name or id.
A comprehensive list can be found in the documentation for
`docker ps
`_.
Returns:
A list of dicts, one per container
Raises:
:py:class:`docker.errors.APIError`
If the server returns an error.
"""
params = {
'limit': 1 if latest else limit,
'all': 1 if all else 0,
'size': 1 if size else 0,
'trunc_cmd': 1 if trunc else 0,
'since': since,
'before': before
}
if filters:
params['filters'] = utils.convert_filters(filters)
u = self._url("/containers/json")
res = self._result(self._get(u, params=params), True)
if quiet:
return [{'Id': x['Id']} for x in res]
if trunc:
for x in res:
x['Id'] = x['Id'][:12]
return res
def create_container(self, image, command=None, hostname=None, user=None,
detach=False, stdin_open=False, tty=False, ports=None,
environment=None, volumes=None,
network_disabled=False, name=None, entrypoint=None,
working_dir=None, domainname=None, host_config=None,
mac_address=None, labels=None, stop_signal=None,
networking_config=None, healthcheck=None,
stop_timeout=None, runtime=None,
use_config_proxy=True):
"""
Creates a container. Parameters are similar to those for the ``docker
run`` command except it doesn't support the attach options (``-a``).
The arguments that are passed directly to this function are
host-independent configuration options. Host-specific configuration
is passed with the `host_config` argument. You'll normally want to
use this method in combination with the :py:meth:`create_host_config`
method to generate ``host_config``.
**Port bindings**
Port binding is done in two parts: first, provide a list of ports to
open inside the container with the ``ports`` parameter, then declare
bindings with the ``host_config`` parameter. For example:
.. code-block:: python
container_id = client.api.create_container(
'busybox', 'ls', ports=[1111, 2222],
host_config=client.api.create_host_config(port_bindings={
1111: 4567,
2222: None
})
)
You can limit the host address on which the port will be exposed like
such:
.. code-block:: python
client.api.create_host_config(port_bindings={1111: ('127.0.0.1', 4567)})
Or without host port assignment:
.. code-block:: python
client.api.create_host_config(port_bindings={1111: ('127.0.0.1',)})
If you wish to use UDP instead of TCP (default), you need to declare
ports as such in both the config and host config:
.. code-block:: python
container_id = client.api.create_container(
'busybox', 'ls', ports=[(1111, 'udp'), 2222],
host_config=client.api.create_host_config(port_bindings={
'1111/udp': 4567, 2222: None
})
)
To bind multiple host ports to a single container port, use the
following syntax:
.. code-block:: python
client.api.create_host_config(port_bindings={
1111: [1234, 4567]
})
You can also bind multiple IPs to a single container port:
.. code-block:: python
client.api.create_host_config(port_bindings={
1111: [
('192.168.0.100', 1234),
('192.168.0.101', 1234)
]
})
**Using volumes**
Volume declaration is done in two parts. Provide a list of
paths to use as mountpoints inside the container with the
``volumes`` parameter, and declare mappings from paths on the host
in the ``host_config`` section.
.. code-block:: python
container_id = client.api.create_container(
'busybox', 'ls', volumes=['/mnt/vol1', '/mnt/vol2'],
host_config=client.api.create_host_config(binds={
'/home/user1/': {
'bind': '/mnt/vol2',
'mode': 'rw',
},
'/var/www': {
'bind': '/mnt/vol1',
'mode': 'ro',
}
})
)
You can alternatively specify binds as a list. This code is equivalent
to the example above:
.. code-block:: python
container_id = client.api.create_container(
'busybox', 'ls', volumes=['/mnt/vol1', '/mnt/vol2'],
host_config=client.api.create_host_config(binds=[
'/home/user1/:/mnt/vol2',
'/var/www:/mnt/vol1:ro',
])
)
**Networking**
You can specify networks to connect the container to by using the
``networking_config`` parameter. At the time of creation, you can
only connect a container to a single networking, but you
can create more connections by using
:py:meth:`~connect_container_to_network`.
For example:
.. code-block:: python
networking_config = client.api.create_networking_config({
'network1': client.api.create_endpoint_config(
ipv4_address='172.28.0.124',
aliases=['foo', 'bar'],
links=['container2']
)
})
ctnr = client.api.create_container(
img, command, networking_config=networking_config
)
Args:
image (str): The image to run
command (str or list): The command to be run in the container
hostname (str): Optional hostname for the container
user (str or int): Username or UID
detach (bool): Detached mode: run container in the background and
return container ID
stdin_open (bool): Keep STDIN open even if not attached
tty (bool): Allocate a pseudo-TTY
ports (list of ints): A list of port numbers
environment (dict or list): A dictionary or a list of strings in
the following format ``["PASSWORD=xxx"]`` or
``{"PASSWORD": "xxx"}``.
volumes (str or list): List of paths inside the container to use
as volumes.
network_disabled (bool): Disable networking
name (str): A name for the container
entrypoint (str or list): An entrypoint
working_dir (str): Path to the working directory
domainname (str): The domain name to use for the container
host_config (dict): A dictionary created with
:py:meth:`create_host_config`.
mac_address (str): The Mac Address to assign the container
labels (dict or list): A dictionary of name-value labels (e.g.
``{"label1": "value1", "label2": "value2"}``) or a list of
names of labels to set with empty values (e.g.
``["label1", "label2"]``)
stop_signal (str): The stop signal to use to stop the container
(e.g. ``SIGINT``).
stop_timeout (int): Timeout to stop the container, in seconds.
Default: 10
networking_config (dict): A networking configuration generated
by :py:meth:`create_networking_config`.
runtime (str): Runtime to use with this container.
healthcheck (dict): Specify a test to perform to check that the
container is healthy.
use_config_proxy (bool): If ``True``, and if the docker client
configuration file (``~/.docker/config.json`` by default)
contains a proxy configuration, the corresponding environment
variables will be set in the container being created.
Returns:
A dictionary with an image 'Id' key and a 'Warnings' key.
Raises:
:py:class:`docker.errors.ImageNotFound`
If the specified image does not exist.
:py:class:`docker.errors.APIError`
If the server returns an error.
"""
if isinstance(volumes, str):
volumes = [volumes, ]
if isinstance(environment, dict):
environment = utils.utils.format_environment(environment)
if use_config_proxy:
environment = self._proxy_configs.inject_proxy_environment(
environment
) or None
config = self.create_container_config(
image, command, hostname, user, detach, stdin_open, tty,
ports, environment, volumes,
network_disabled, entrypoint, working_dir, domainname,
host_config, mac_address, labels,
stop_signal, networking_config, healthcheck,
stop_timeout, runtime
)
return self.create_container_from_config(config, name)
def create_container_config(self, *args, **kwargs):
return ContainerConfig(self._version, *args, **kwargs)
def create_container_from_config(self, config, name=None):
u = self._url("/containers/create")
params = {
'name': name
}
res = self._post_json(u, data=config, params=params)
return self._result(res, True)
def create_host_config(self, *args, **kwargs):
"""
Create a dictionary for the ``host_config`` argument to
:py:meth:`create_container`.
Args:
auto_remove (bool): enable auto-removal of the container on daemon
side when the container's process exits.
binds (dict): Volumes to bind. See :py:meth:`create_container`
for more information.
blkio_weight_device: Block IO weight (relative device weight) in
the form of: ``[{"Path": "device_path", "Weight": weight}]``.
blkio_weight: Block IO weight (relative weight), accepts a weight
value between 10 and 1000.
cap_add (list of str): Add kernel capabilities. For example,
``["SYS_ADMIN", "MKNOD"]``.
cap_drop (list of str): Drop kernel capabilities.
cpu_period (int): The length of a CPU period in microseconds.
cpu_quota (int): Microseconds of CPU time that the container can
get in a CPU period.
cpu_shares (int): CPU shares (relative weight).
cpuset_cpus (str): CPUs in which to allow execution (``0-3``,
``0,1``).
cpuset_mems (str): Memory nodes (MEMs) in which to allow execution
(``0-3``, ``0,1``). Only effective on NUMA systems.
device_cgroup_rules (:py:class:`list`): A list of cgroup rules to
apply to the container.
device_read_bps: Limit read rate (bytes per second) from a device
in the form of: `[{"Path": "device_path", "Rate": rate}]`
device_read_iops: Limit read rate (IO per second) from a device.
device_write_bps: Limit write rate (bytes per second) from a
device.
device_write_iops: Limit write rate (IO per second) from a device.
devices (:py:class:`list`): Expose host devices to the container,
as a list of strings in the form
``::``.
For example, ``/dev/sda:/dev/xvda:rwm`` allows the container
to have read-write access to the host's ``/dev/sda`` via a
node named ``/dev/xvda`` inside the container.
device_requests (:py:class:`list`): Expose host resources such as
GPUs to the container, as a list of
:py:class:`docker.types.DeviceRequest` instances.
dns (:py:class:`list`): Set custom DNS servers.
dns_opt (:py:class:`list`): Additional options to be added to the
container's ``resolv.conf`` file
dns_search (:py:class:`list`): DNS search domains.
extra_hosts (dict): Additional hostnames to resolve inside the
container, as a mapping of hostname to IP address.
group_add (:py:class:`list`): List of additional group names and/or
IDs that the container process will run as.
init (bool): Run an init inside the container that forwards
signals and reaps processes
ipc_mode (str): Set the IPC mode for the container.
isolation (str): Isolation technology to use. Default: ``None``.
links (dict): Mapping of links using the
``{'container': 'alias'}`` format. The alias is optional.
Containers declared in this dict will be linked to the new
container using the provided alias. Default: ``None``.
log_config (LogConfig): Logging configuration
lxc_conf (dict): LXC config.
mem_limit (float or str): Memory limit. Accepts float values
(which represent the memory limit of the created container in
bytes) or a string with a units identification char
(``100000b``, ``1000k``, ``128m``, ``1g``). If a string is
specified without a units character, bytes are assumed as an
mem_reservation (float or str): Memory soft limit.
mem_swappiness (int): Tune a container's memory swappiness
behavior. Accepts number between 0 and 100.
memswap_limit (str or int): Maximum amount of memory + swap a
container is allowed to consume.
mounts (:py:class:`list`): Specification for mounts to be added to
the container. More powerful alternative to ``binds``. Each
item in the list is expected to be a
:py:class:`docker.types.Mount` object.
network_mode (str): One of:
- ``bridge`` Create a new network stack for the container on
the bridge network.
- ``none`` No networking for this container.
- ``container:`` Reuse another container's network
stack.
- ``host`` Use the host network stack.
This mode is incompatible with ``port_bindings``.
oom_kill_disable (bool): Whether to disable OOM killer.
oom_score_adj (int): An integer value containing the score given
to the container in order to tune OOM killer preferences.
pid_mode (str): If set to ``host``, use the host PID namespace
inside the container.
pids_limit (int): Tune a container's pids limit. Set ``-1`` for
unlimited.
port_bindings (dict): See :py:meth:`create_container`
for more information.
Imcompatible with ``host`` in ``network_mode``.
privileged (bool): Give extended privileges to this container.
publish_all_ports (bool): Publish all ports to the host.
read_only (bool): Mount the container's root filesystem as read
only.
restart_policy (dict): Restart the container when it exits.
Configured as a dictionary with keys:
- ``Name`` One of ``on-failure``, or ``always``.
- ``MaximumRetryCount`` Number of times to restart the
container on failure.
security_opt (:py:class:`list`): A list of string values to
customize labels for MLS systems, such as SELinux.
shm_size (str or int): Size of /dev/shm (e.g. ``1G``).
storage_opt (dict): Storage driver options per container as a
key-value mapping.
sysctls (dict): Kernel parameters to set in the container.
tmpfs (dict): Temporary filesystems to mount, as a dictionary
mapping a path inside the container to options for that path.
For example:
.. code-block:: python
{
'/mnt/vol2': '',
'/mnt/vol1': 'size=3G,uid=1000'
}
ulimits (:py:class:`list`): Ulimits to set inside the container,
as a list of :py:class:`docker.types.Ulimit` instances.
userns_mode (str): Sets the user namespace mode for the container
when user namespace remapping option is enabled. Supported
values are: ``host``
uts_mode (str): Sets the UTS namespace mode for the container.
Supported values are: ``host``
volumes_from (:py:class:`list`): List of container names or IDs to
get volumes from.
runtime (str): Runtime to use with this container.
Returns:
(dict) A dictionary which can be passed to the ``host_config``
argument to :py:meth:`create_container`.
Example:
>>> client.api.create_host_config(privileged=True, cap_drop=['MKNOD'],
volumes_from=['nostalgic_newton'])
{'CapDrop': ['MKNOD'], 'LxcConf': None, 'Privileged': True,
'VolumesFrom': ['nostalgic_newton'], 'PublishAllPorts': False}
"""
if not kwargs:
kwargs = {}
if 'version' in kwargs:
raise TypeError(
"create_host_config() got an unexpected "
"keyword argument 'version'"
)
kwargs['version'] = self._version
return HostConfig(*args, **kwargs)
def create_networking_config(self, *args, **kwargs):
"""
Create a networking config dictionary to be used as the
``networking_config`` parameter in :py:meth:`create_container`.
Args:
endpoints_config (dict): A dictionary mapping network names to
endpoint configurations generated by
:py:meth:`create_endpoint_config`.
Returns:
(dict) A networking config.
Example:
>>> client.api.create_network('network1')
>>> networking_config = client.api.create_networking_config({
'network1': client.api.create_endpoint_config()
})
>>> container = client.api.create_container(
img, command, networking_config=networking_config
)
"""
return NetworkingConfig(*args, **kwargs)
def create_endpoint_config(self, *args, **kwargs):
"""
Create an endpoint config dictionary to be used with
:py:meth:`create_networking_config`.
Args:
aliases (:py:class:`list`): A list of aliases for this endpoint.
Names in that list can be used within the network to reach the
container. Defaults to ``None``.
links (dict): Mapping of links for this endpoint using the
``{'container': 'alias'}`` format. The alias is optional.
Containers declared in this dict will be linked to this
container using the provided alias. Defaults to ``None``.
ipv4_address (str): The IP address of this container on the
network, using the IPv4 protocol. Defaults to ``None``.
ipv6_address (str): The IP address of this container on the
network, using the IPv6 protocol. Defaults to ``None``.
link_local_ips (:py:class:`list`): A list of link-local (IPv4/IPv6)
addresses.
driver_opt (dict): A dictionary of options to provide to the
network driver. Defaults to ``None``.
Returns:
(dict) An endpoint config.
Example:
>>> endpoint_config = client.api.create_endpoint_config(
aliases=['web', 'app'],
links={'app_db': 'db', 'another': None},
ipv4_address='132.65.0.123'
)
"""
return EndpointConfig(self._version, *args, **kwargs)
@utils.check_resource('container')
def diff(self, container):
"""
Inspect changes on a container's filesystem.
Args:
container (str): The container to diff
Returns:
(str)
Raises:
:py:class:`docker.errors.APIError`
If the server returns an error.
"""
return self._result(
self._get(self._url("/containers/{0}/changes", container)), True
)
@utils.check_resource('container')
def export(self, container, chunk_size=DEFAULT_DATA_CHUNK_SIZE):
"""
Export the contents of a filesystem as a tar archive.
Args:
container (str): The container to export
chunk_size (int): The number of bytes returned by each iteration
of the generator. If ``None``, data will be streamed as it is
received. Default: 2 MB
Returns:
(generator): The archived filesystem data stream
Raises:
:py:class:`docker.errors.APIError`
If the server returns an error.
"""
res = self._get(
self._url("/containers/{0}/export", container), stream=True
)
return self._stream_raw_result(res, chunk_size, False)
@utils.check_resource('container')
def get_archive(self, container, path, chunk_size=DEFAULT_DATA_CHUNK_SIZE,
encode_stream=False):
"""
Retrieve a file or folder from a container in the form of a tar
archive.
Args:
container (str): The container where the file is located
path (str): Path to the file or folder to retrieve
chunk_size (int): The number of bytes returned by each iteration
of the generator. If ``None``, data will be streamed as it is
received. Default: 2 MB
encode_stream (bool): Determines if data should be encoded
(gzip-compressed) during transmission. Default: False
Returns:
(tuple): First element is a raw tar data stream. Second element is
a dict containing ``stat`` information on the specified ``path``.
Raises:
:py:class:`docker.errors.APIError`
If the server returns an error.
Example:
>>> c = docker.APIClient()
>>> f = open('./sh_bin.tar', 'wb')
>>> bits, stat = c.api.get_archive(container, '/bin/sh')
>>> print(stat)
{'name': 'sh', 'size': 1075464, 'mode': 493,
'mtime': '2018-10-01T15:37:48-07:00', 'linkTarget': ''}
>>> for chunk in bits:
... f.write(chunk)
>>> f.close()
"""
params = {
'path': path
}
headers = {
"Accept-Encoding": "gzip, deflate"
} if encode_stream else {
"Accept-Encoding": "identity"
}
url = self._url('/containers/{0}/archive', container)
res = self._get(url, params=params, stream=True, headers=headers)
self._raise_for_status(res)
encoded_stat = res.headers.get('x-docker-container-path-stat')
return (
self._stream_raw_result(res, chunk_size, False),
utils.decode_json_header(encoded_stat) if encoded_stat else None
)
@utils.check_resource('container')
def inspect_container(self, container):
"""
Identical to the `docker inspect` command, but only for containers.
Args:
container (str): The container to inspect
Returns:
(dict): Similar to the output of `docker inspect`, but as a
single dict
Raises:
:py:class:`docker.errors.APIError`
If the server returns an error.
"""
return self._result(
self._get(self._url("/containers/{0}/json", container)), True
)
@utils.check_resource('container')
def kill(self, container, signal=None):
"""
Kill a container or send a signal to a container.
Args:
container (str): The container to kill
signal (str or int): The signal to send. Defaults to ``SIGKILL``
Raises:
:py:class:`docker.errors.APIError`
If the server returns an error.
"""
url = self._url("/containers/{0}/kill", container)
params = {}
if signal is not None:
if not isinstance(signal, str):
signal = int(signal)
params['signal'] = signal
res = self._post(url, params=params)
self._raise_for_status(res)
@utils.check_resource('container')
def logs(self, container, stdout=True, stderr=True, stream=False,
timestamps=False, tail='all', since=None, follow=None,
until=None):
"""
Get logs from a container. Similar to the ``docker logs`` command.
The ``stream`` parameter makes the ``logs`` function return a blocking
generator you can iterate over to retrieve log output as it happens.
Args:
container (str): The container to get logs from
stdout (bool): Get ``STDOUT``. Default ``True``
stderr (bool): Get ``STDERR``. Default ``True``
stream (bool): Stream the response. Default ``False``
timestamps (bool): Show timestamps. Default ``False``
tail (str or int): Output specified number of lines at the end of
logs. Either an integer of number of lines or the string
``all``. Default ``all``
since (datetime or int): Show logs since a given datetime or
integer epoch (in seconds)
follow (bool): Follow log output. Default ``False``
until (datetime or int): Show logs that occurred before the given
datetime or integer epoch (in seconds)
Returns:
(generator or str)
Raises:
:py:class:`docker.errors.APIError`
If the server returns an error.
"""
if follow is None:
follow = stream
params = {'stderr': stderr and 1 or 0,
'stdout': stdout and 1 or 0,
'timestamps': timestamps and 1 or 0,
'follow': follow and 1 or 0,
}
if tail != 'all' and (not isinstance(tail, int) or tail < 0):
tail = 'all'
params['tail'] = tail
if since is not None:
if isinstance(since, datetime):
params['since'] = utils.datetime_to_timestamp(since)
elif (isinstance(since, int) and since > 0):
params['since'] = since
else:
raise errors.InvalidArgument(
'since value should be datetime or positive int, '
'not {}'.format(type(since))
)
if until is not None:
if utils.version_lt(self._version, '1.35'):
raise errors.InvalidVersion(
'until is not supported for API version < 1.35'
)
if isinstance(until, datetime):
params['until'] = utils.datetime_to_timestamp(until)
elif (isinstance(until, int) and until > 0):
params['until'] = until
else:
raise errors.InvalidArgument(
'until value should be datetime or positive int, '
'not {}'.format(type(until))
)
url = self._url("/containers/{0}/logs", container)
res = self._get(url, params=params, stream=stream)
output = self._get_result(container, stream, res)
if stream:
return CancellableStream(output, res)
else:
return output
@utils.check_resource('container')
def pause(self, container):
"""
Pauses all processes within a container.
Args:
container (str): The container to pause
Raises:
:py:class:`docker.errors.APIError`
If the server returns an error.
"""
url = self._url('/containers/{0}/pause', container)
res = self._post(url)
self._raise_for_status(res)
@utils.check_resource('container')
def port(self, container, private_port):
"""
Lookup the public-facing port that is NAT-ed to ``private_port``.
Identical to the ``docker port`` command.
Args:
container (str): The container to look up
private_port (int): The private port to inspect
Returns:
(list of dict): The mapping for the host ports
Raises:
:py:class:`docker.errors.APIError`
If the server returns an error.
Example:
.. code-block:: bash
$ docker run -d -p 80:80 ubuntu:14.04 /bin/sleep 30
7174d6347063a83f412fad6124c99cffd25ffe1a0807eb4b7f9cec76ac8cb43b
.. code-block:: python
>>> client.api.port('7174d6347063', 80)
[{'HostIp': '0.0.0.0', 'HostPort': '80'}]
"""
res = self._get(self._url("/containers/{0}/json", container))
self._raise_for_status(res)
json_ = res.json()
private_port = str(private_port)
h_ports = None
# Port settings is None when the container is running with
# network_mode=host.
port_settings = json_.get('NetworkSettings', {}).get('Ports')
if port_settings is None:
return None
if '/' in private_port:
return port_settings.get(private_port)
for protocol in ['tcp', 'udp', 'sctp']:
h_ports = port_settings.get(private_port + '/' + protocol)
if h_ports:
break
return h_ports
@utils.check_resource('container')
def put_archive(self, container, path, data):
"""
Insert a file or folder in an existing container using a tar archive as
source.
Args:
container (str): The container where the file(s) will be extracted
path (str): Path inside the container where the file(s) will be
extracted. Must exist.
data (bytes): tar data to be extracted
Returns:
(bool): True if the call succeeds.
Raises:
:py:class:`docker.errors.APIError`
If the server returns an error.
"""
params = {'path': path}
url = self._url('/containers/{0}/archive', container)
res = self._put(url, params=params, data=data)
self._raise_for_status(res)
return res.status_code == 200
@utils.minimum_version('1.25')
def prune_containers(self, filters=None):
"""
Delete stopped containers
Args:
filters (dict): Filters to process on the prune list.
Returns:
(dict): A dict containing a list of deleted container IDs and
the amount of disk space reclaimed in bytes.
Raises:
:py:class:`docker.errors.APIError`
If the server returns an error.
"""
params = {}
if filters:
params['filters'] = utils.convert_filters(filters)
url = self._url('/containers/prune')
return self._result(self._post(url, params=params), True)
@utils.check_resource('container')
def remove_container(self, container, v=False, link=False, force=False):
"""
Remove a container. Similar to the ``docker rm`` command.
Args:
container (str): The container to remove
v (bool): Remove the volumes associated with the container
link (bool): Remove the specified link and not the underlying
container
force (bool): Force the removal of a running container (uses
``SIGKILL``)
Raises:
:py:class:`docker.errors.APIError`
If the server returns an error.
"""
params = {'v': v, 'link': link, 'force': force}
res = self._delete(
self._url("/containers/{0}", container), params=params
)
self._raise_for_status(res)
@utils.check_resource('container')
def rename(self, container, name):
"""
Rename a container. Similar to the ``docker rename`` command.
Args:
container (str): ID of the container to rename
name (str): New name for the container
Raises:
:py:class:`docker.errors.APIError`
If the server returns an error.
"""
url = self._url("/containers/{0}/rename", container)
params = {'name': name}
res = self._post(url, params=params)
self._raise_for_status(res)
@utils.check_resource('container')
def resize(self, container, height, width):
"""
Resize the tty session.
Args:
container (str or dict): The container to resize
height (int): Height of tty session
width (int): Width of tty session
Raises:
:py:class:`docker.errors.APIError`
If the server returns an error.
"""
params = {'h': height, 'w': width}
url = self._url("/containers/{0}/resize", container)
res = self._post(url, params=params)
self._raise_for_status(res)
@utils.check_resource('container')
def restart(self, container, timeout=10):
"""
Restart a container. Similar to the ``docker restart`` command.
Args:
container (str or dict): The container to restart. If a dict, the
``Id`` key is used.
timeout (int): Number of seconds to try to stop for before killing
the container. Once killed it will then be restarted. Default
is 10 seconds.
Raises:
:py:class:`docker.errors.APIError`
If the server returns an error.
"""
params = {'t': timeout}
url = self._url("/containers/{0}/restart", container)
conn_timeout = self.timeout
if conn_timeout is not None:
conn_timeout += timeout
res = self._post(url, params=params, timeout=conn_timeout)
self._raise_for_status(res)
@utils.check_resource('container')
def start(self, container, *args, **kwargs):
"""
Start a container. Similar to the ``docker start`` command, but
doesn't support attach options.
**Deprecation warning:** Passing configuration options in ``start`` is
no longer supported. Users are expected to provide host config options
in the ``host_config`` parameter of
:py:meth:`~ContainerApiMixin.create_container`.
Args:
container (str): The container to start
Raises:
:py:class:`docker.errors.APIError`
If the server returns an error.
:py:class:`docker.errors.DeprecatedMethod`
If any argument besides ``container`` are provided.
Example:
>>> container = client.api.create_container(
... image='busybox:latest',
... command='/bin/sleep 30')
>>> client.api.start(container=container.get('Id'))
"""
if args or kwargs:
raise errors.DeprecatedMethod(
'Providing configuration in the start() method is no longer '
'supported. Use the host_config param in create_container '
'instead.'
)
url = self._url("/containers/{0}/start", container)
res = self._post(url)
self._raise_for_status(res)
@utils.check_resource('container')
def stats(self, container, decode=None, stream=True):
"""
Stream statistics for a specific container. Similar to the
``docker stats`` command.
Args:
container (str): The container to stream statistics from
decode (bool): If set to true, stream will be decoded into dicts
on the fly. Only applicable if ``stream`` is True.
False by default.
stream (bool): If set to false, only the current stats will be
returned instead of a stream. True by default.
Raises:
:py:class:`docker.errors.APIError`
If the server returns an error.
"""
url = self._url("/containers/{0}/stats", container)
if stream:
return self._stream_helper(self._get(url, stream=True),
decode=decode)
else:
if decode:
raise errors.InvalidArgument(
"decode is only available in conjunction with stream=True"
)
return self._result(self._get(url, params={'stream': False}),
json=True)
@utils.check_resource('container')
def stop(self, container, timeout=None):
"""
Stops a container. Similar to the ``docker stop`` command.
Args:
container (str): The container to stop
timeout (int): Timeout in seconds to wait for the container to
stop before sending a ``SIGKILL``. If None, then the
StopTimeout value of the container will be used.
Default: None
Raises:
:py:class:`docker.errors.APIError`
If the server returns an error.
"""
if timeout is None:
params = {}
timeout = 10
else:
params = {'t': timeout}
url = self._url("/containers/{0}/stop", container)
conn_timeout = self.timeout
if conn_timeout is not None:
conn_timeout += timeout
res = self._post(url, params=params, timeout=conn_timeout)
self._raise_for_status(res)
@utils.check_resource('container')
def top(self, container, ps_args=None):
"""
Display the running processes of a container.
Args:
container (str): The container to inspect
ps_args (str): An optional arguments passed to ps (e.g. ``aux``)
Returns:
(str): The output of the top
Raises:
:py:class:`docker.errors.APIError`
If the server returns an error.
"""
u = self._url("/containers/{0}/top", container)
params = {}
if ps_args is not None:
params['ps_args'] = ps_args
return self._result(self._get(u, params=params), True)
@utils.check_resource('container')
def unpause(self, container):
"""
Unpause all processes within a container.
Args:
container (str): The container to unpause
"""
url = self._url('/containers/{0}/unpause', container)
res = self._post(url)
self._raise_for_status(res)
@utils.minimum_version('1.22')
@utils.check_resource('container')
def update_container(
self, container, blkio_weight=None, cpu_period=None, cpu_quota=None,
cpu_shares=None, cpuset_cpus=None, cpuset_mems=None, mem_limit=None,
mem_reservation=None, memswap_limit=None, kernel_memory=None,
restart_policy=None
):
"""
Update resource configs of one or more containers.
Args:
container (str): The container to inspect
blkio_weight (int): Block IO (relative weight), between 10 and 1000
cpu_period (int): Limit CPU CFS (Completely Fair Scheduler) period
cpu_quota (int): Limit CPU CFS (Completely Fair Scheduler) quota
cpu_shares (int): CPU shares (relative weight)
cpuset_cpus (str): CPUs in which to allow execution
cpuset_mems (str): MEMs in which to allow execution
mem_limit (float or str): Memory limit
mem_reservation (float or str): Memory soft limit
memswap_limit (int or str): Total memory (memory + swap), -1 to
disable swap
kernel_memory (int or str): Kernel memory limit
restart_policy (dict): Restart policy dictionary
Returns:
(dict): Dictionary containing a ``Warnings`` key.
Raises:
:py:class:`docker.errors.APIError`
If the server returns an error.
"""
url = self._url('/containers/{0}/update', container)
data = {}
if blkio_weight:
data['BlkioWeight'] = blkio_weight
if cpu_period:
data['CpuPeriod'] = cpu_period
if cpu_shares:
data['CpuShares'] = cpu_shares
if cpu_quota:
data['CpuQuota'] = cpu_quota
if cpuset_cpus:
data['CpusetCpus'] = cpuset_cpus
if cpuset_mems:
data['CpusetMems'] = cpuset_mems
if mem_limit:
data['Memory'] = utils.parse_bytes(mem_limit)
if mem_reservation:
data['MemoryReservation'] = utils.parse_bytes(mem_reservation)
if memswap_limit:
data['MemorySwap'] = utils.parse_bytes(memswap_limit)
if kernel_memory:
data['KernelMemory'] = utils.parse_bytes(kernel_memory)
if restart_policy:
if utils.version_lt(self._version, '1.23'):
raise errors.InvalidVersion(
'restart policy update is not supported '
'for API version < 1.23'
)
data['RestartPolicy'] = restart_policy
res = self._post_json(url, data=data)
return self._result(res, True)
@utils.check_resource('container')
def wait(self, container, timeout=None, condition=None):
"""
Block until a container stops, then return its exit code. Similar to
the ``docker wait`` command.
Args:
container (str or dict): The container to wait on. If a dict, the
``Id`` key is used.
timeout (int): Request timeout
condition (str): Wait until a container state reaches the given
condition, either ``not-running`` (default), ``next-exit``,
or ``removed``
Returns:
(dict): The API's response as a Python dictionary, including
the container's exit code under the ``StatusCode`` attribute.
Raises:
:py:class:`requests.exceptions.ReadTimeout`
If the timeout is exceeded.
:py:class:`docker.errors.APIError`
If the server returns an error.
"""
url = self._url("/containers/{0}/wait", container)
params = {}
if condition is not None:
if utils.version_lt(self._version, '1.30'):
raise errors.InvalidVersion(
'wait condition is not supported for API version < 1.30'
)
params['condition'] = condition
res = self._post(url, timeout=timeout, params=params)
return self._result(res, True)