Merge pull request #2109 from docker/rollback_config

Add support for RollbackConfig

docker/api/service.py

@@ -2,7 +2,8 @@ from .. import auth, errors, utils
 from ..types import ServiceMode
 
 
-def _check_api_features(version, task_template, update_config, endpoint_spec):
+def _check_api_features(version, task_template, update_config, endpoint_spec,
+                        rollback_config):
 
     def raise_version_error(param, min_version):
         raise errors.InvalidVersion(
@@ -28,6 +29,14 @@ def _check_api_features(version, task_template, update_config, endpoint_spec):
             if 'Order' in update_config:
                 raise_version_error('UpdateConfig.order', '1.29')
 
+    if rollback_config is not None:
+        if utils.version_lt(version, '1.28'):
+            raise_version_error('rollback_config', '1.28')
+
+        if utils.version_lt(version, '1.29'):
+            if 'Order' in update_config:
+                raise_version_error('RollbackConfig.order', '1.29')
+
     if endpoint_spec is not None:
         if utils.version_lt(version, '1.32') and 'Ports' in endpoint_spec:
             if any(p.get('PublishMode') for p in endpoint_spec['Ports']):
@@ -105,7 +114,7 @@ class ServiceApiMixin(object):
     def create_service(
             self, task_template, name=None, labels=None, mode=None,
             update_config=None, networks=None, endpoint_config=None,
-            endpoint_spec=None
+            endpoint_spec=None, rollback_config=None
     ):
         """
         Create a service.
@@ -120,6 +129,8 @@ class ServiceApiMixin(object):
                 or global). Defaults to replicated.
             update_config (UpdateConfig): Specification for the update strategy
                 of the service. Default: ``None``
+            rollback_config (RollbackConfig): Specification for the rollback
+                strategy of the service. Default: ``None``
             networks (:py:class:`list`): List of network names or IDs to attach
                 the service to. Default: ``None``.
             endpoint_spec (EndpointSpec): Properties that can be configured to
@@ -135,7 +146,8 @@ class ServiceApiMixin(object):
         """
 
         _check_api_features(
-            self._version, task_template, update_config, endpoint_spec
+            self._version, task_template, update_config, endpoint_spec,
+            rollback_config
         )
 
         url = self._url('/services/create')
@@ -166,6 +178,9 @@ class ServiceApiMixin(object):
         if update_config is not None:
             data['UpdateConfig'] = update_config
 
+        if rollback_config is not None:
+            data['RollbackConfig'] = rollback_config
+
         return self._result(
             self._post_json(url, data=data, headers=headers), True
         )
@@ -342,7 +357,8 @@ class ServiceApiMixin(object):
     def update_service(self, service, version, task_template=None, name=None,
                        labels=None, mode=None, update_config=None,
                        networks=None, endpoint_config=None,
-                       endpoint_spec=None, fetch_current_spec=False):
+                       endpoint_spec=None, fetch_current_spec=False,
+                       rollback_config=None):
         """
         Update a service.
 
@@ -360,6 +376,8 @@ class ServiceApiMixin(object):
                 or global). Defaults to replicated.
             update_config (UpdateConfig): Specification for the update strategy
                 of the service. Default: ``None``.
+            rollback_config (RollbackConfig): Specification for the rollback
+                strategy of the service. Default: ``None``
             networks (:py:class:`list`): List of network names or IDs to attach
                 the service to. Default: ``None``.
             endpoint_spec (EndpointSpec): Properties that can be configured to
@@ -376,7 +394,8 @@ class ServiceApiMixin(object):
         """
 
         _check_api_features(
-            self._version, task_template, update_config, endpoint_spec
+            self._version, task_template, update_config, endpoint_spec,
+            rollback_config
         )
 
         if fetch_current_spec:
@@ -422,6 +441,11 @@ class ServiceApiMixin(object):
         else:
             data['UpdateConfig'] = current.get('UpdateConfig')
 
+        if rollback_config is not None:
+            data['RollbackConfig'] = rollback_config
+        else:
+            data['RollbackConfig'] = current.get('RollbackConfig')
+
         if networks is not None:
             converted_networks = utils.convert_service_networks(networks)
             if utils.version_lt(self._version, '1.25'):

docker/models/services.py

@@ -183,6 +183,8 @@ class ServiceCollection(Collection):
                 containers to terminate before forcefully killing them.
             update_config (UpdateConfig): Specification for the update strategy
                 of the service. Default: ``None``
+            rollback_config (RollbackConfig): Specification for the rollback
+                strategy of the service. Default: ``None``
             user (str): User to run commands as.
             workdir (str): Working directory for commands to run.
             tty (boolean): Whether a pseudo-TTY should be allocated.

docker/types/__init__.py

@@ -5,7 +5,7 @@ from .healthcheck import Healthcheck
 from .networks import EndpointConfig, IPAMConfig, IPAMPool, NetworkingConfig
 from .services import (
     ConfigReference, ContainerSpec, DNSConfig, DriverConfig, EndpointSpec,
-    Mount, Placement, Privileges, Resources, RestartPolicy, SecretReference,
-    ServiceMode, TaskTemplate, UpdateConfig
+    Mount, Placement, Privileges, Resources, RestartPolicy, RollbackConfig,
+    SecretReference, ServiceMode, TaskTemplate, UpdateConfig
 )
 from .swarm import SwarmSpec, SwarmExternalCA

docker/types/services.py

@@ -414,6 +414,30 @@ class UpdateConfig(dict):
             self['Order'] = order
 
 
+class RollbackConfig(UpdateConfig):
+    """
+    Used to specify the way containe rollbacks should be performed by a service
+
+    Args:
+        parallelism (int): Maximum number of tasks to be rolled back in one
+          iteration (0 means unlimited parallelism). Default: 0
+        delay (int): Amount of time between rollbacks, in nanoseconds.
+        failure_action (string): Action to take if a rolled back task fails to
+          run, or stops running during the rollback. Acceptable values are
+          ``continue``, ``pause`` or ``rollback``.
+          Default: ``continue``
+        monitor (int): Amount of time to monitor each rolled back task for
+          failures, in nanoseconds.
+        max_failure_ratio (float): The fraction of tasks that may fail during
+          a rollback before the failure action is invoked, specified as a
+          floating point number between 0 and 1. Default: 0
+        order (string): Specifies the order of operations when rolling out a
+          rolled back task. Either ``start_first`` or ``stop_first`` are
+          accepted.
+    """
+    pass
+
+
 class RestartConditionTypesEnum(object):
     _values = (
         'none',

tests/integration/api_service_test.py

@@ -312,6 +312,27 @@ class ServiceTest(BaseAPIIntegrationTest):
         assert update_config['Monitor'] == uc['Monitor']
         assert update_config['MaxFailureRatio'] == uc['MaxFailureRatio']
 
+    @requires_api_version('1.28')
+    def test_create_service_with_rollback_config(self):
+        container_spec = docker.types.ContainerSpec(BUSYBOX, ['true'])
+        task_tmpl = docker.types.TaskTemplate(container_spec)
+        rollback_cfg = docker.types.RollbackConfig(
+            parallelism=10, delay=5, failure_action='pause',
+            monitor=300000000, max_failure_ratio=0.4
+        )
+        name = self.get_service_name()
+        svc_id = self.client.create_service(
+            task_tmpl, rollback_config=rollback_cfg, name=name
+        )
+        svc_info = self.client.inspect_service(svc_id)
+        assert 'RollbackConfig' in svc_info['Spec']
+        rc = svc_info['Spec']['RollbackConfig']
+        assert rollback_cfg['Parallelism'] == rc['Parallelism']
+        assert rollback_cfg['Delay'] == rc['Delay']
+        assert rollback_cfg['FailureAction'] == rc['FailureAction']
+        assert rollback_cfg['Monitor'] == rc['Monitor']
+        assert rollback_cfg['MaxFailureRatio'] == rc['MaxFailureRatio']
+
     def test_create_service_with_restart_policy(self):
         container_spec = docker.types.ContainerSpec(BUSYBOX, ['true'])
         policy = docker.types.RestartPolicy(