Current File : //proc/25810/root/lib/python3.6/site-packages/compose/service.py
from __future__ import absolute_import
from __future__ import unicode_literals
import logging
import os
import re
import sys
from collections import namedtuple
from operator import attrgetter
import enum
import six
from docker.errors import APIError
from docker.errors import ImageNotFound
from docker.errors import NotFound
from docker.types import LogConfig
from docker.types import Mount
from docker.utils import version_gte
from docker.utils import version_lt
from docker.utils.ports import build_port_bindings
from docker.utils.ports import split_port
from docker.utils.utils import convert_tmpfs_mounts
from . import __version__
from . import const
from . import progress_stream
from .config import DOCKER_CONFIG_KEYS
from .config import merge_environment
from .config import merge_labels
from .config.errors import DependencyError
from .config.types import MountSpec
from .config.types import ServicePort
from .config.types import VolumeSpec
from .const import DEFAULT_TIMEOUT
from .const import IS_WINDOWS_PLATFORM
from .const import LABEL_CONFIG_HASH
from .const import LABEL_CONTAINER_NUMBER
from .const import LABEL_ONE_OFF
from .const import LABEL_PROJECT
from .const import LABEL_SERVICE
from .const import LABEL_VERSION
from .const import NANOCPUS_SCALE
from .container import Container
from .errors import HealthCheckFailed
from .errors import NoHealthCheckConfigured
from .errors import OperationFailedError
from .parallel import parallel_execute
from .progress_stream import stream_output
from .progress_stream import StreamOutputError
from .utils import json_hash
from .utils import parse_bytes
from .utils import parse_seconds_float
log = logging.getLogger(__name__)
HOST_CONFIG_KEYS = [
'cap_add',
'cap_drop',
'cgroup_parent',
'cpu_count',
'cpu_percent',
'cpu_quota',
'cpu_shares',
'cpus',
'cpuset',
'devices',
'dns',
'dns_search',
'dns_opt',
'env_file',
'extra_hosts',
'group_add',
'init',
'ipc',
'read_only',
'log_driver',
'log_opt',
'mem_limit',
'mem_reservation',
'memswap_limit',
'mem_swappiness',
'oom_kill_disable',
'oom_score_adj',
'pid',
'pids_limit',
'privileged',
'restart',
'security_opt',
'shm_size',
'storage_opt',
'sysctls',
'userns_mode',
'volumes_from',
'volume_driver',
]
CONDITION_STARTED = 'service_started'
CONDITION_HEALTHY = 'service_healthy'
class BuildError(Exception):
def __init__(self, service, reason):
self.service = service
self.reason = reason
class NeedsBuildError(Exception):
def __init__(self, service):
self.service = service
class NoSuchImageError(Exception):
pass
ServiceName = namedtuple('ServiceName', 'project service number')
ConvergencePlan = namedtuple('ConvergencePlan', 'action containers')
@enum.unique
class ConvergenceStrategy(enum.Enum):
"""Enumeration for all possible convergence strategies. Values refer to
when containers should be recreated.
"""
changed = 1
always = 2
never = 3
@property
def allows_recreate(self):
return self is not type(self).never
@enum.unique
class ImageType(enum.Enum):
"""Enumeration for the types of images known to compose."""
none = 0
local = 1
all = 2
@enum.unique
class BuildAction(enum.Enum):
"""Enumeration for the possible build actions."""
none = 0
force = 1
skip = 2
class Service(object):
def __init__(
self,
name,
client=None,
project='default',
use_networking=False,
links=None,
volumes_from=None,
network_mode=None,
networks=None,
secrets=None,
scale=None,
pid_mode=None,
**options
):
self.name = name
self.client = client
self.project = project
self.use_networking = use_networking
self.links = links or []
self.volumes_from = volumes_from or []
self.network_mode = network_mode or NetworkMode(None)
self.pid_mode = pid_mode or PidMode(None)
self.networks = networks or {}
self.secrets = secrets or []
self.scale_num = scale or 1
self.options = options
def __repr__(self):
return '<Service: {}>'.format(self.name)
def containers(self, stopped=False, one_off=False, filters={}):
filters.update({'label': self.labels(one_off=one_off)})
return list(filter(None, [
Container.from_ps(self.client, container)
for container in self.client.containers(
all=stopped,
filters=filters)]))
def get_container(self, number=1):
"""Return a :class:`compose.container.Container` for this service. The
container must be active, and match `number`.
"""
labels = self.labels() + ['{0}={1}'.format(LABEL_CONTAINER_NUMBER, number)]
for container in self.client.containers(filters={'label': labels}):
return Container.from_ps(self.client, container)
raise ValueError("No container found for %s_%s" % (self.name, number))
def start(self, **options):
containers = self.containers(stopped=True)
for c in containers:
self.start_container_if_stopped(c, **options)
return containers
def show_scale_warnings(self, desired_num):
if self.custom_container_name and desired_num > 1:
log.warn('The "%s" service is using the custom container name "%s". '
'Docker requires each container to have a unique name. '
'Remove the custom name to scale the service.'
% (self.name, self.custom_container_name))
if self.specifies_host_port() and desired_num > 1:
log.warn('The "%s" service specifies a port on the host. If multiple containers '
'for this service are created on a single host, the port will clash.'
% self.name)
def scale(self, desired_num, timeout=None):
"""
Adjusts the number of containers to the specified number and ensures
they are running.
- creates containers until there are at least `desired_num`
- stops containers until there are at most `desired_num` running
- starts containers until there are at least `desired_num` running
- removes all stopped containers
"""
self.show_scale_warnings(desired_num)
running_containers = self.containers(stopped=False)
num_running = len(running_containers)
if desired_num == num_running:
# do nothing as we already have the desired number
log.info('Desired container number already achieved')
return
if desired_num > num_running:
all_containers = self.containers(stopped=True)
if num_running != len(all_containers):
# we have some stopped containers, check for divergences
stopped_containers = [
c for c in all_containers if not c.is_running
]
# Remove containers that have diverged
divergent_containers = [
c for c in stopped_containers if self._containers_have_diverged([c])
]
for c in divergent_containers:
c.remove()
all_containers = list(set(all_containers) - set(divergent_containers))
sorted_containers = sorted(all_containers, key=attrgetter('number'))
self._execute_convergence_start(
sorted_containers, desired_num, timeout, True, True
)
if desired_num < num_running:
num_to_stop = num_running - desired_num
sorted_running_containers = sorted(
running_containers,
key=attrgetter('number'))
self._downscale(sorted_running_containers[-num_to_stop:], timeout)
def create_container(self,
one_off=False,
previous_container=None,
number=None,
quiet=False,
**override_options):
"""
Create a container for this service. If the image doesn't exist, attempt to pull
it.
"""
# This is only necessary for `scale` and `volumes_from`
# auto-creating containers to satisfy the dependency.
self.ensure_image_exists()
container_options = self._get_container_create_options(
override_options,
number or self._next_container_number(one_off=one_off),
one_off=one_off,
previous_container=previous_container,
)
if 'name' in container_options and not quiet:
log.info("Creating %s" % container_options['name'])
try:
return Container.create(self.client, **container_options)
except APIError as ex:
raise OperationFailedError("Cannot create container for service %s: %s" %
(self.name, ex.explanation))
def ensure_image_exists(self, do_build=BuildAction.none):
if self.can_be_built() and do_build == BuildAction.force:
self.build()
return
try:
self.image()
return
except NoSuchImageError:
pass
if not self.can_be_built():
self.pull()
return
if do_build == BuildAction.skip:
raise NeedsBuildError(self)
self.build()
log.warn(
"Image for service {} was built because it did not already exist. To "
"rebuild this image you must use `docker-compose build` or "
"`docker-compose up --build`.".format(self.name))
def image(self):
try:
return self.client.inspect_image(self.image_name)
except ImageNotFound:
raise NoSuchImageError("Image '{}' not found".format(self.image_name))
@property
def image_name(self):
return self.options.get('image', '{s.project}_{s.name}'.format(s=self))
def convergence_plan(self, strategy=ConvergenceStrategy.changed):
containers = self.containers(stopped=True)
if not containers:
return ConvergencePlan('create', [])
if strategy is ConvergenceStrategy.never:
return ConvergencePlan('start', containers)
if (
strategy is ConvergenceStrategy.always or
self._containers_have_diverged(containers)
):
return ConvergencePlan('recreate', containers)
stopped = [c for c in containers if not c.is_running]
if stopped:
return ConvergencePlan('start', stopped)
return ConvergencePlan('noop', containers)
def _containers_have_diverged(self, containers):
config_hash = None
try:
config_hash = self.config_hash
except NoSuchImageError as e:
log.debug(
'Service %s has diverged: %s',
self.name, six.text_type(e),
)
return True
has_diverged = False
for c in containers:
container_config_hash = c.labels.get(LABEL_CONFIG_HASH, None)
if container_config_hash != config_hash:
log.debug(
'%s has diverged: %s != %s',
c.name, container_config_hash, config_hash,
)
has_diverged = True
return has_diverged
def _execute_convergence_create(self, scale, detached, start, project_services=None):
i = self._next_container_number()
def create_and_start(service, n):
container = service.create_container(number=n, quiet=True)
if not detached:
container.attach_log_stream()
if start:
self.start_container(container)
return container
containers, errors = parallel_execute(
[ServiceName(self.project, self.name, index) for index in range(i, i + scale)],
lambda service_name: create_and_start(self, service_name.number),
lambda service_name: self.get_container_name(service_name.service, service_name.number),
"Creating",
parent_objects=project_services
)
for error in errors.values():
raise OperationFailedError(error)
return containers
def _execute_convergence_recreate(self, containers, scale, timeout, detached, start):
if scale is not None and len(containers) > scale:
self._downscale(containers[scale:], timeout)
containers = containers[:scale]
def recreate(container):
return self.recreate_container(
container, timeout=timeout, attach_logs=not detached,
start_new_container=start
)
containers, errors = parallel_execute(
containers,
recreate,
lambda c: c.name,
"Recreating",
)
for error in errors.values():
raise OperationFailedError(error)
if scale is not None and len(containers) < scale:
containers.extend(self._execute_convergence_create(
scale - len(containers), detached, start
))
return containers
def _execute_convergence_start(self, containers, scale, timeout, detached, start):
if scale is not None and len(containers) > scale:
self._downscale(containers[scale:], timeout)
containers = containers[:scale]
if start:
_, errors = parallel_execute(
containers,
lambda c: self.start_container_if_stopped(c, attach_logs=not detached, quiet=True),
lambda c: c.name,
"Starting",
)
for error in errors.values():
raise OperationFailedError(error)
if scale is not None and len(containers) < scale:
containers.extend(self._execute_convergence_create(
scale - len(containers), detached, start
))
return containers
def _downscale(self, containers, timeout=None):
def stop_and_remove(container):
container.stop(timeout=self.stop_timeout(timeout))
container.remove()
parallel_execute(
containers,
stop_and_remove,
lambda c: c.name,
"Stopping and removing",
)
def execute_convergence_plan(self, plan, timeout=None, detached=False,
start=True, scale_override=None, rescale=True, project_services=None):
(action, containers) = plan
scale = scale_override if scale_override is not None else self.scale_num
containers = sorted(containers, key=attrgetter('number'))
self.show_scale_warnings(scale)
if action == 'create':
return self._execute_convergence_create(
scale, detached, start, project_services
)
# The create action needs always needs an initial scale, but otherwise,
# we set scale to none in no-rescale scenarios (`run` dependencies)
if not rescale:
scale = None
if action == 'recreate':
return self._execute_convergence_recreate(
containers, scale, timeout, detached, start
)
if action == 'start':
return self._execute_convergence_start(
containers, scale, timeout, detached, start
)
if action == 'noop':
if scale != len(containers):
return self._execute_convergence_start(
containers, scale, timeout, detached, start
)
for c in containers:
log.info("%s is up-to-date" % c.name)
return containers
raise Exception("Invalid action: {}".format(action))
def recreate_container(
self,
container,
timeout=None,
attach_logs=False,
start_new_container=True):
"""Recreate a container.
The original container is renamed to a temporary name so that data
volumes can be copied to the new container, before the original
container is removed.
"""
container.stop(timeout=self.stop_timeout(timeout))
container.rename_to_tmp_name()
new_container = self.create_container(
previous_container=container,
number=container.labels.get(LABEL_CONTAINER_NUMBER),
quiet=True,
)
if attach_logs:
new_container.attach_log_stream()
if start_new_container:
self.start_container(new_container)
container.remove()
return new_container
def stop_timeout(self, timeout):
if timeout is not None:
return timeout
timeout = parse_seconds_float(self.options.get('stop_grace_period'))
if timeout is not None:
return timeout
return DEFAULT_TIMEOUT
def start_container_if_stopped(self, container, attach_logs=False, quiet=False):
if not container.is_running:
if not quiet:
log.info("Starting %s" % container.name)
if attach_logs:
container.attach_log_stream()
return self.start_container(container)
def start_container(self, container):
self.connect_container_to_networks(container)
try:
container.start()
except APIError as ex:
raise OperationFailedError("Cannot start service %s: %s" % (self.name, ex.explanation))
return container
def connect_container_to_networks(self, container):
connected_networks = container.get('NetworkSettings.Networks')
for network, netdefs in self.networks.items():
if network in connected_networks:
if short_id_alias_exists(container, network):
continue
self.client.disconnect_container_from_network(
container.id,
network)
self.client.connect_container_to_network(
container.id, network,
aliases=self._get_aliases(netdefs, container),
ipv4_address=netdefs.get('ipv4_address', None),
ipv6_address=netdefs.get('ipv6_address', None),
links=self._get_links(False),
link_local_ips=netdefs.get('link_local_ips', None),
)
def remove_duplicate_containers(self, timeout=None):
for c in self.duplicate_containers():
log.info('Removing %s' % c.name)
c.stop(timeout=self.stop_timeout(timeout))
c.remove()
def duplicate_containers(self):
containers = sorted(
self.containers(stopped=True),
key=lambda c: c.get('Created'),
)
numbers = set()
for c in containers:
if c.number in numbers:
yield c
else:
numbers.add(c.number)
@property
def config_hash(self):
return json_hash(self.config_dict())
def config_dict(self):
return {
'options': self.options,
'image_id': self.image()['Id'],
'links': self.get_link_names(),
'net': self.network_mode.id,
'networks': self.networks,
'volumes_from': [
(v.source.name, v.mode)
for v in self.volumes_from if isinstance(v.source, Service)
],
}
def get_dependency_names(self):
net_name = self.network_mode.service_name
pid_namespace = self.pid_mode.service_name
return (
self.get_linked_service_names() +
self.get_volumes_from_names() +
([net_name] if net_name else []) +
([pid_namespace] if pid_namespace else []) +
list(self.options.get('depends_on', {}).keys())
)
def get_dependency_configs(self):
net_name = self.network_mode.service_name
pid_namespace = self.pid_mode.service_name
configs = dict(
[(name, None) for name in self.get_linked_service_names()]
)
configs.update(dict(
[(name, None) for name in self.get_volumes_from_names()]
))
configs.update({net_name: None} if net_name else {})
configs.update({pid_namespace: None} if pid_namespace else {})
configs.update(self.options.get('depends_on', {}))
for svc, config in self.options.get('depends_on', {}).items():
if config['condition'] == CONDITION_STARTED:
configs[svc] = lambda s: True
elif config['condition'] == CONDITION_HEALTHY:
configs[svc] = lambda s: s.is_healthy()
else:
# The config schema already prevents this, but it might be
# bypassed if Compose is called programmatically.
raise ValueError(
'depends_on condition "{}" is invalid.'.format(
config['condition']
)
)
return configs
def get_linked_service_names(self):
return [service.name for (service, _) in self.links]
def get_link_names(self):
return [(service.name, alias) for service, alias in self.links]
def get_volumes_from_names(self):
return [s.source.name for s in self.volumes_from if isinstance(s.source, Service)]
# TODO: this would benefit from github.com/docker/docker/pull/14699
# to remove the need to inspect every container
def _next_container_number(self, one_off=False):
containers = filter(None, [
Container.from_ps(self.client, container)
for container in self.client.containers(
all=True,
filters={'label': self.labels(one_off=one_off)})
])
numbers = [c.number for c in containers]
return 1 if not numbers else max(numbers) + 1
def _get_aliases(self, network, container=None):
if container and container.labels.get(LABEL_ONE_OFF) == "True":
return []
return list(
{self.name} |
({container.short_id} if container else set()) |
set(network.get('aliases', ()))
)
def build_default_networking_config(self):
if not self.networks:
return {}
network = self.networks[self.network_mode.id]
endpoint = {
'Aliases': self._get_aliases(network),
'IPAMConfig': {},
}
if network.get('ipv4_address'):
endpoint['IPAMConfig']['IPv4Address'] = network.get('ipv4_address')
if network.get('ipv6_address'):
endpoint['IPAMConfig']['IPv6Address'] = network.get('ipv6_address')
return {"EndpointsConfig": {self.network_mode.id: endpoint}}
def _get_links(self, link_to_self):
links = {}
for service, link_name in self.links:
for container in service.containers():
links[link_name or service.name] = container.name
links[container.name] = container.name
links[container.name_without_project] = container.name
if link_to_self:
for container in self.containers():
links[self.name] = container.name
links[container.name] = container.name
links[container.name_without_project] = container.name
for external_link in self.options.get('external_links') or []:
if ':' not in external_link:
link_name = external_link
else:
external_link, link_name = external_link.split(':')
links[link_name] = external_link
return [
(alias, container_name)
for (container_name, alias) in links.items()
]
def _get_volumes_from(self):
return [build_volume_from(spec) for spec in self.volumes_from]
def _get_container_create_options(
self,
override_options,
number,
one_off=False,
previous_container=None):
add_config_hash = (not one_off and not override_options)
container_options = dict(
(k, self.options[k])
for k in DOCKER_CONFIG_KEYS if k in self.options)
override_volumes = override_options.pop('volumes', [])
container_options.update(override_options)
if not container_options.get('name'):
container_options['name'] = self.get_container_name(self.name, number, one_off)
container_options.setdefault('detach', True)
# If a qualified hostname was given, split it into an
# unqualified hostname and a domainname unless domainname
# was also given explicitly. This matches behavior
# until Docker Engine 1.11.0 - Docker API 1.23.
if (version_lt(self.client.api_version, '1.23') and
'hostname' in container_options and
'domainname' not in container_options and
'.' in container_options['hostname']):
parts = container_options['hostname'].partition('.')
container_options['hostname'] = parts[0]
container_options['domainname'] = parts[2]
if (version_gte(self.client.api_version, '1.25') and
'stop_grace_period' in self.options):
container_options['stop_timeout'] = self.stop_timeout(None)
if 'ports' in container_options or 'expose' in self.options:
container_options['ports'] = build_container_ports(
formatted_ports(container_options.get('ports', [])),
self.options)
if 'volumes' in container_options or override_volumes:
container_options['volumes'] = list(set(
container_options.get('volumes', []) + override_volumes
))
container_options['environment'] = merge_environment(
self.options.get('environment'),
override_options.get('environment'))
container_options['labels'] = merge_labels(
self.options.get('labels'),
override_options.get('labels'))
container_options, override_options = self._build_container_volume_options(
previous_container, container_options, override_options
)
container_options['image'] = self.image_name
container_options['labels'] = build_container_labels(
container_options.get('labels', {}),
self.labels(one_off=one_off),
number,
self.config_hash if add_config_hash else None)
# Delete options which are only used in HostConfig
for key in HOST_CONFIG_KEYS:
container_options.pop(key, None)
container_options['host_config'] = self._get_container_host_config(
override_options,
one_off=one_off)
networking_config = self.build_default_networking_config()
if networking_config:
container_options['networking_config'] = networking_config
container_options['environment'] = format_environment(
container_options['environment'])
return container_options
def _build_container_volume_options(self, previous_container, container_options, override_options):
container_volumes = []
container_mounts = []
if 'volumes' in container_options:
container_volumes = [
v for v in container_options.get('volumes') if isinstance(v, VolumeSpec)
]
container_mounts = [v for v in container_options.get('volumes') if isinstance(v, MountSpec)]
binds, affinity = merge_volume_bindings(
container_volumes, self.options.get('tmpfs') or [], previous_container,
container_mounts
)
override_options['binds'] = binds
container_options['environment'].update(affinity)
container_options['volumes'] = dict((v.internal, {}) for v in container_volumes or {})
if version_gte(self.client.api_version, '1.30'):
override_options['mounts'] = [build_mount(v) for v in container_mounts] or None
else:
override_options['binds'].extend(m.legacy_repr() for m in container_mounts)
container_options['volumes'].update((m.target, {}) for m in container_mounts)
secret_volumes = self.get_secret_volumes()
if secret_volumes:
if version_lt(self.client.api_version, '1.30'):
override_options['binds'].extend(v.legacy_repr() for v in secret_volumes)
container_options['volumes'].update(
(v.target, {}) for v in secret_volumes
)
else:
override_options['mounts'] = override_options.get('mounts') or []
override_options['mounts'].extend([build_mount(v) for v in secret_volumes])
return container_options, override_options
def _get_container_host_config(self, override_options, one_off=False):
options = dict(self.options, **override_options)
logging_dict = options.get('logging', None)
blkio_config = convert_blkio_config(options.get('blkio_config', None))
log_config = get_log_config(logging_dict)
init_path = None
if isinstance(options.get('init'), six.string_types):
init_path = options.get('init')
options['init'] = True
nano_cpus = None
if 'cpus' in options:
nano_cpus = int(options.get('cpus') * NANOCPUS_SCALE)
return self.client.create_host_config(
links=self._get_links(link_to_self=one_off),
port_bindings=build_port_bindings(
formatted_ports(options.get('ports', []))
),
binds=options.get('binds'),
volumes_from=self._get_volumes_from(),
privileged=options.get('privileged', False),
network_mode=self.network_mode.mode,
devices=options.get('devices'),
dns=options.get('dns'),
dns_opt=options.get('dns_opt'),
dns_search=options.get('dns_search'),
restart_policy=options.get('restart'),
cap_add=options.get('cap_add'),
cap_drop=options.get('cap_drop'),
mem_limit=options.get('mem_limit'),
mem_reservation=options.get('mem_reservation'),
memswap_limit=options.get('memswap_limit'),
ulimits=build_ulimits(options.get('ulimits')),
log_config=log_config,
extra_hosts=options.get('extra_hosts'),
read_only=options.get('read_only'),
pid_mode=self.pid_mode.mode,
security_opt=options.get('security_opt'),
ipc_mode=options.get('ipc'),
cgroup_parent=options.get('cgroup_parent'),
cpu_quota=options.get('cpu_quota'),
shm_size=options.get('shm_size'),
sysctls=options.get('sysctls'),
pids_limit=options.get('pids_limit'),
tmpfs=options.get('tmpfs'),
oom_kill_disable=options.get('oom_kill_disable'),
oom_score_adj=options.get('oom_score_adj'),
mem_swappiness=options.get('mem_swappiness'),
group_add=options.get('group_add'),
userns_mode=options.get('userns_mode'),
init=options.get('init', None),
init_path=init_path,
isolation=options.get('isolation'),
cpu_count=options.get('cpu_count'),
cpu_percent=options.get('cpu_percent'),
nano_cpus=nano_cpus,
volume_driver=options.get('volume_driver'),
cpuset_cpus=options.get('cpuset'),
cpu_shares=options.get('cpu_shares'),
storage_opt=options.get('storage_opt'),
blkio_weight=blkio_config.get('weight'),
blkio_weight_device=blkio_config.get('weight_device'),
device_read_bps=blkio_config.get('device_read_bps'),
device_read_iops=blkio_config.get('device_read_iops'),
device_write_bps=blkio_config.get('device_write_bps'),
device_write_iops=blkio_config.get('device_write_iops'),
mounts=options.get('mounts'),
)
def get_secret_volumes(self):
def build_spec(secret):
target = secret['secret'].target
if target is None:
target = '{}/{}'.format(const.SECRETS_PATH, secret['secret'].source)
elif not os.path.isabs(target):
target = '{}/{}'.format(const.SECRETS_PATH, target)
return MountSpec('bind', secret['file'], target, read_only=True)
return [build_spec(secret) for secret in self.secrets]
def build(self, no_cache=False, pull=False, force_rm=False, memory=None, build_args_override=None):
log.info('Building %s' % self.name)
build_opts = self.options.get('build', {})
build_args = build_opts.get('args', {}).copy()
if build_args_override:
build_args.update(build_args_override)
# python2 os.stat() doesn't support unicode on some UNIX, so we
# encode it to a bytestring to be safe
path = build_opts.get('context')
if not six.PY3 and not IS_WINDOWS_PLATFORM:
path = path.encode('utf8')
build_output = self.client.build(
path=path,
tag=self.image_name,
stream=True,
rm=True,
forcerm=force_rm,
pull=pull,
nocache=no_cache,
dockerfile=build_opts.get('dockerfile', None),
cache_from=build_opts.get('cache_from', None),
labels=build_opts.get('labels', None),
buildargs=build_args,
network_mode=build_opts.get('network', None),
target=build_opts.get('target', None),
shmsize=parse_bytes(build_opts.get('shm_size')) if build_opts.get('shm_size') else None,
extra_hosts=build_opts.get('extra_hosts', None),
container_limits={
'memory': parse_bytes(memory) if memory else None
},
)
try:
all_events = stream_output(build_output, sys.stdout)
except StreamOutputError as e:
raise BuildError(self, six.text_type(e))
# Ensure the HTTP connection is not reused for another
# streaming command, as the Docker daemon can sometimes
# complain about it
self.client.close()
image_id = None
for event in all_events:
if 'stream' in event:
match = re.search(r'Successfully built ([0-9a-f]+)', event.get('stream', ''))
if match:
image_id = match.group(1)
if image_id is None:
raise BuildError(self, event if all_events else 'Unknown')
return image_id
def can_be_built(self):
return 'build' in self.options
def labels(self, one_off=False):
return [
'{0}={1}'.format(LABEL_PROJECT, self.project),
'{0}={1}'.format(LABEL_SERVICE, self.name),
'{0}={1}'.format(LABEL_ONE_OFF, "True" if one_off else "False")
]
@property
def custom_container_name(self):
return self.options.get('container_name')
def get_container_name(self, service_name, number, one_off=False):
if self.custom_container_name and not one_off:
return self.custom_container_name
container_name = build_container_name(
self.project, service_name, number, one_off,
)
ext_links_origins = [l.split(':')[0] for l in self.options.get('external_links', [])]
if container_name in ext_links_origins:
raise DependencyError(
'Service {0} has a self-referential external link: {1}'.format(
self.name, container_name
)
)
return container_name
def remove_image(self, image_type):
if not image_type or image_type == ImageType.none:
return False
if image_type == ImageType.local and self.options.get('image'):
return False
log.info("Removing image %s", self.image_name)
try:
self.client.remove_image(self.image_name)
return True
except APIError as e:
log.error("Failed to remove image for service %s: %s", self.name, e)
return False
def specifies_host_port(self):
def has_host_port(binding):
if isinstance(binding, dict):
external_bindings = binding.get('published')
else:
_, external_bindings = split_port(binding)
# there are no external bindings
if external_bindings is None:
return False
# we only need to check the first binding from the range
external_binding = external_bindings[0]
# non-tuple binding means there is a host port specified
if not isinstance(external_binding, tuple):
return True
# extract actual host port from tuple of (host_ip, host_port)
_, host_port = external_binding
if host_port is not None:
return True
return False
return any(has_host_port(binding) for binding in self.options.get('ports', []))
def pull(self, ignore_pull_failures=False, silent=False):
if 'image' not in self.options:
return
repo, tag, separator = parse_repository_tag(self.options['image'])
tag = tag or 'latest'
if not silent:
log.info('Pulling %s (%s%s%s)...' % (self.name, repo, separator, tag))
try:
output = self.client.pull(repo, tag=tag, stream=True)
if silent:
with open(os.devnull, 'w') as devnull:
return progress_stream.get_digest_from_pull(
stream_output(output, devnull))
else:
return progress_stream.get_digest_from_pull(
stream_output(output, sys.stdout))
except (StreamOutputError, NotFound) as e:
if not ignore_pull_failures:
raise
else:
log.error(six.text_type(e))
def push(self, ignore_push_failures=False):
if 'image' not in self.options or 'build' not in self.options:
return
repo, tag, separator = parse_repository_tag(self.options['image'])
tag = tag or 'latest'
log.info('Pushing %s (%s%s%s)...' % (self.name, repo, separator, tag))
output = self.client.push(repo, tag=tag, stream=True)
try:
return progress_stream.get_digest_from_push(
stream_output(output, sys.stdout))
except StreamOutputError as e:
if not ignore_push_failures:
raise
else:
log.error(six.text_type(e))
def is_healthy(self):
""" Check that all containers for this service report healthy.
Returns false if at least one healthcheck is pending.
If an unhealthy container is detected, raise a HealthCheckFailed
exception.
"""
result = True
for ctnr in self.containers():
ctnr.inspect()
status = ctnr.get('State.Health.Status')
if status is None:
raise NoHealthCheckConfigured(self.name)
elif status == 'starting':
result = False
elif status == 'unhealthy':
raise HealthCheckFailed(ctnr.short_id)
return result
def short_id_alias_exists(container, network):
aliases = container.get(
'NetworkSettings.Networks.{net}.Aliases'.format(net=network)) or ()
return container.short_id in aliases
class PidMode(object):
def __init__(self, mode):
self._mode = mode
@property
def mode(self):
return self._mode
@property
def service_name(self):
return None
class ServicePidMode(PidMode):
def __init__(self, service):
self.service = service
@property
def service_name(self):
return self.service.name
@property
def mode(self):
containers = self.service.containers()
if containers:
return 'container:' + containers[0].id
log.warn(
"Service %s is trying to use reuse the PID namespace "
"of another service that is not running." % (self.service_name)
)
return None
class ContainerPidMode(PidMode):
def __init__(self, container):
self.container = container
self._mode = 'container:{}'.format(container.id)
class NetworkMode(object):
"""A `standard` network mode (ex: host, bridge)"""
service_name = None
def __init__(self, network_mode):
self.network_mode = network_mode
@property
def id(self):
return self.network_mode
mode = id
class ContainerNetworkMode(object):
"""A network mode that uses a container's network stack."""
service_name = None
def __init__(self, container):
self.container = container
@property
def id(self):
return self.container.id
@property
def mode(self):
return 'container:' + self.container.id
class ServiceNetworkMode(object):
"""A network mode that uses a service's network stack."""
def __init__(self, service):
self.service = service
@property
def id(self):
return self.service.name
service_name = id
@property
def mode(self):
containers = self.service.containers()
if containers:
return 'container:' + containers[0].id
log.warn("Service %s is trying to use reuse the network stack "
"of another service that is not running." % (self.id))
return None
# Names
def build_container_name(project, service, number, one_off=False):
bits = [project, service]
if one_off:
bits.append('run')
return '_'.join(bits + [str(number)])
# Images
def parse_repository_tag(repo_path):
"""Splits image identification into base image path, tag/digest
and it's separator.
Example:
>>> parse_repository_tag('user/repo@sha256:digest')
('user/repo', 'sha256:digest', '@')
>>> parse_repository_tag('user/repo:v1')
('user/repo', 'v1', ':')
"""
tag_separator = ":"
digest_separator = "@"
if digest_separator in repo_path:
repo, tag = repo_path.rsplit(digest_separator, 1)
return repo, tag, digest_separator
repo, tag = repo_path, ""
if tag_separator in repo_path:
repo, tag = repo_path.rsplit(tag_separator, 1)
if "/" in tag:
repo, tag = repo_path, ""
return repo, tag, tag_separator
# Volumes
def merge_volume_bindings(volumes, tmpfs, previous_container, mounts):
"""
Return a list of volume bindings for a container. Container data volumes
are replaced by those from the previous container.
Anonymous mounts are updated in place.
"""
affinity = {}
volume_bindings = dict(
build_volume_binding(volume)
for volume in volumes
if volume.external
)
if previous_container:
old_volumes, old_mounts = get_container_data_volumes(
previous_container, volumes, tmpfs, mounts
)
warn_on_masked_volume(volumes, old_volumes, previous_container.service)
volume_bindings.update(
build_volume_binding(volume) for volume in old_volumes
)
if old_volumes or old_mounts:
affinity = {'affinity:container': '=' + previous_container.id}
return list(volume_bindings.values()), affinity
def get_container_data_volumes(container, volumes_option, tmpfs_option, mounts_option):
"""
Find the container data volumes that are in `volumes_option`, and return
a mapping of volume bindings for those volumes.
Anonymous volume mounts are updated in place instead.
"""
volumes = []
volumes_option = volumes_option or []
container_mounts = dict(
(mount['Destination'], mount)
for mount in container.get('Mounts') or {}
)
image_volumes = [
VolumeSpec.parse(volume)
for volume in
container.image_config['ContainerConfig'].get('Volumes') or {}
]
for volume in set(volumes_option + image_volumes):
# No need to preserve host volumes
if volume.external:
continue
# Attempting to rebind tmpfs volumes breaks: https://github.com/docker/compose/issues/4751
if volume.internal in convert_tmpfs_mounts(tmpfs_option).keys():
continue
mount = container_mounts.get(volume.internal)
# New volume, doesn't exist in the old container
if not mount:
continue
# Volume was previously a host volume, now it's a container volume
if not mount.get('Name'):
continue
# Copy existing volume from old container
volume = volume._replace(external=mount['Name'])
volumes.append(volume)
updated_mounts = False
for mount in mounts_option:
if mount.type != 'volume':
continue
ctnr_mount = container_mounts.get(mount.target)
if not ctnr_mount.get('Name'):
continue
mount.source = ctnr_mount['Name']
updated_mounts = True
return volumes, updated_mounts
def warn_on_masked_volume(volumes_option, container_volumes, service):
container_volumes = dict(
(volume.internal, volume.external)
for volume in container_volumes)
for volume in volumes_option:
if (
volume.external and
volume.internal in container_volumes and
container_volumes.get(volume.internal) != volume.external
):
log.warn((
"Service \"{service}\" is using volume \"{volume}\" from the "
"previous container. Host mapping \"{host_path}\" has no effect. "
"Remove the existing containers (with `docker-compose rm {service}`) "
"to use the host volume mapping."
).format(
service=service,
volume=volume.internal,
host_path=volume.external))
def build_volume_binding(volume_spec):
return volume_spec.internal, volume_spec.repr()
def build_volume_from(volume_from_spec):
"""
volume_from can be either a service or a container. We want to return the
container.id and format it into a string complete with the mode.
"""
if isinstance(volume_from_spec.source, Service):
containers = volume_from_spec.source.containers(stopped=True)
if not containers:
return "{}:{}".format(
volume_from_spec.source.create_container().id,
volume_from_spec.mode)
container = containers[0]
return "{}:{}".format(container.id, volume_from_spec.mode)
elif isinstance(volume_from_spec.source, Container):
return "{}:{}".format(volume_from_spec.source.id, volume_from_spec.mode)
def build_mount(mount_spec):
kwargs = {}
if mount_spec.options:
for option, sdk_name in mount_spec.options_map[mount_spec.type].items():
if option in mount_spec.options:
kwargs[sdk_name] = mount_spec.options[option]
return Mount(
type=mount_spec.type, target=mount_spec.target, source=mount_spec.source,
read_only=mount_spec.read_only, consistency=mount_spec.consistency, **kwargs
)
# Labels
def build_container_labels(label_options, service_labels, number, config_hash):
labels = dict(label_options or {})
labels.update(label.split('=', 1) for label in service_labels)
labels[LABEL_CONTAINER_NUMBER] = str(number)
labels[LABEL_VERSION] = __version__
if config_hash:
log.debug("Added config hash: %s" % config_hash)
labels[LABEL_CONFIG_HASH] = config_hash
return labels
# Ulimits
def build_ulimits(ulimit_config):
if not ulimit_config:
return None
ulimits = []
for limit_name, soft_hard_values in six.iteritems(ulimit_config):
if isinstance(soft_hard_values, six.integer_types):
ulimits.append({'name': limit_name, 'soft': soft_hard_values, 'hard': soft_hard_values})
elif isinstance(soft_hard_values, dict):
ulimit_dict = {'name': limit_name}
ulimit_dict.update(soft_hard_values)
ulimits.append(ulimit_dict)
return ulimits
def get_log_config(logging_dict):
log_driver = logging_dict.get('driver', "") if logging_dict else ""
log_options = logging_dict.get('options', None) if logging_dict else None
return LogConfig(
type=log_driver,
config=log_options
)
# TODO: remove once fix is available in docker-py
def format_environment(environment):
def format_env(key, value):
if value is None:
return key
if isinstance(value, six.binary_type):
value = value.decode('utf-8')
return '{key}={value}'.format(key=key, value=value)
return [format_env(*item) for item in environment.items()]
# Ports
def formatted_ports(ports):
result = []
for port in ports:
if isinstance(port, ServicePort):
result.append(port.legacy_repr())
else:
result.append(port)
return result
def build_container_ports(container_ports, options):
ports = []
all_ports = container_ports + options.get('expose', [])
for port_range in all_ports:
internal_range, _ = split_port(port_range)
for port in internal_range:
port = str(port)
if '/' in port:
port = tuple(port.split('/'))
ports.append(port)
return ports
def convert_blkio_config(blkio_config):
result = {}
if blkio_config is None:
return result
result['weight'] = blkio_config.get('weight')
for field in [
"device_read_bps", "device_read_iops", "device_write_bps",
"device_write_iops", "weight_device",
]:
if field not in blkio_config:
continue
arr = []
for item in blkio_config[field]:
arr.append(dict([(k.capitalize(), v) for k, v in item.items()]))
result[field] = arr
return result
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