docker_*: make modules more robust on Docker errors (#57913)

* Improve general error behavior if a Docker error is not caught.

* Don't die when network doesn't exist.

* Add changelog.

* Make API version always available. Also catch errors when retrieving version.

* Fix error message.

* Adjust fallback error messages.

(cherry picked from commit f8f2738351)

changelogs/fragments/57913-docker-robustness.yaml

@@ -0,0 +1,2 @@
+bugfixes:
+- "docker_* modules - improve robustness when not handled Docker errors occur."

lib/ansible/module_utils/docker/common.py

@@ -332,14 +332,14 @@ class AnsibleDockerClient(Client):
 
         try:
             super(AnsibleDockerClient, self).__init__(**self._connect_params)
+            self.docker_api_version_str = self.version()['ApiVersion']
         except APIError as exc:
             self.fail("Docker API error: %s" % exc)
         except Exception as exc:
             self.fail("Error connecting: %s" % exc)
 
+        self.docker_api_version = LooseVersion(self.docker_api_version_str)
         if min_docker_api_version is not None:
-            self.docker_api_version_str = self.version()['ApiVersion']
-            self.docker_api_version = LooseVersion(self.docker_api_version_str)
             if self.docker_api_version < LooseVersion(min_docker_api_version):
                 self.fail('Docker API version is %s. Minimum version required is %s.' % (self.docker_api_version_str, min_docker_api_version))
 

lib/ansible/modules/cloud/docker/docker_compose.py

@@ -443,6 +443,7 @@ import os
 import re
 import sys
 import tempfile
+import traceback
 from contextlib import contextmanager
 from distutils.version import LooseVersion
 
@@ -452,7 +453,13 @@ try:
     HAS_YAML_EXC = None
 except ImportError as exc:
     HAS_YAML = False
-    HAS_YAML_EXC = str(exc)
+    HAS_YAML_EXC = traceback.format_exc()
+
+try:
+    from docker.errors import DockerException
+except ImportError:
+    # missing Docker SDK for Python handled in ansible.module_utils.docker.common
+    pass
 
 try:
     from compose import __version__ as compose_version
@@ -463,10 +470,9 @@ try:
     HAS_COMPOSE = True
     HAS_COMPOSE_EXC = None
     MINIMUM_COMPOSE_VERSION = '1.7.0'
-
 except ImportError as exc:
     HAS_COMPOSE = False
-    HAS_COMPOSE_EXC = str(exc)
+    HAS_COMPOSE_EXC = traceback.format_exc()
     DEFAULT_TIMEOUT = 10
 
 from ansible.module_utils.docker.common import AnsibleDockerClient, DockerBaseClass
@@ -1090,8 +1096,11 @@ def main():
     if client.module._name == 'docker_service':
         client.module.deprecate("The 'docker_service' module has been renamed to 'docker_compose'.", version='2.12')
 
-    result = ContainerManager(client).exec_module()
-    client.module.exit_json(**result)
+    try:
+        result = ContainerManager(client).exec_module()
+        client.module.exit_json(**result)
+    except DockerException as e:
+        client.fail('An unexpected docker error occurred: {0}'.format(e), exception=traceback.format_exc())
 
 
 if __name__ == '__main__':

lib/ansible/modules/cloud/docker/docker_config.py

@@ -152,9 +152,10 @@ config_id:
 
 import base64
 import hashlib
+import traceback
 
 try:
-    from docker.errors import APIError
+    from docker.errors import DockerException, APIError
 except ImportError:
     # missing Docker SDK for Python handled in ansible.module_utils.docker.common
     pass
@@ -281,12 +282,15 @@ def main():
         min_docker_api_version='1.30',
     )
 
-    results = dict(
-        changed=False,
-    )
+    try:
+        results = dict(
+            changed=False,
+        )
 
-    ConfigManager(client, results)()
-    client.module.exit_json(**results)
+        ConfigManager(client, results)()
+        client.module.exit_json(**results)
+    except DockerException as e:
+        client.fail('An unexpected docker error occurred: {0}'.format(e), exception=traceback.format_exc())
 
 
 if __name__ == '__main__':

lib/ansible/modules/cloud/docker/docker_container.py

@@ -942,6 +942,7 @@ container:
 import os
 import re
 import shlex
+import traceback
 from distutils.version import LooseVersion
 
 from ansible.module_utils.common.text.formatters import human_to_bytes
@@ -964,7 +965,7 @@ try:
         from docker.types import Ulimit, LogConfig
     else:
         from docker.utils.types import Ulimit, LogConfig
-    from docker.errors import APIError, NotFound
+    from docker.errors import DockerException, APIError, NotFound
 except Exception:
     # missing Docker SDK for Python handled in ansible.module_utils.docker.common
     pass
@@ -1410,11 +1411,17 @@ class TaskParameters(DockerBaseClass):
             return ip
         for net in self.networks:
             if net.get('name'):
-                network = self.client.inspect_network(net['name'])
-                if network.get('Driver') == 'bridge' and \
-                   network.get('Options', {}).get('com.docker.network.bridge.host_binding_ipv4'):
-                    ip = network['Options']['com.docker.network.bridge.host_binding_ipv4']
-                    break
+                try:
+                    network = self.client.inspect_network(net['name'])
+                    if network.get('Driver') == 'bridge' and \
+                       network.get('Options', {}).get('com.docker.network.bridge.host_binding_ipv4'):
+                        ip = network['Options']['com.docker.network.bridge.host_binding_ipv4']
+                        break
+                except NotFound as e:
+                    self.client.fail(
+                        "Cannot inspect the network '{0}' to determine the default IP.".format(net['name']),
+                        exception=traceback.format_exc()
+                    )
         return ip
 
     def _parse_publish_ports(self):
@@ -3017,8 +3024,11 @@ def main():
             version='2.12'
         )
 
-    cm = ContainerManager(client)
-    client.module.exit_json(**sanitize_result(cm.results))
+    try:
+        cm = ContainerManager(client)
+        client.module.exit_json(**sanitize_result(cm.results))
+    except DockerException as e:
+        client.fail('An unexpected docker error occurred: {0}'.format(e), exception=traceback.format_exc())
 
 
 if __name__ == '__main__':

lib/ansible/modules/cloud/docker/docker_container_info.py

@@ -107,6 +107,14 @@ container:
     }'
 '''
 
+import traceback
+
+try:
+    from docker.errors import DockerException
+except ImportError:
+    # missing Docker SDK for Python handled in ansible.module_utils.docker.common
+    pass
+
 from ansible.module_utils.docker.common import AnsibleDockerClient
 
 
@@ -121,13 +129,16 @@ def main():
         min_docker_api_version='1.20',
     )
 
-    container = client.get_container(client.module.params['name'])
+    try:
+        container = client.get_container(client.module.params['name'])
 
-    client.module.exit_json(
-        changed=False,
-        exists=(True if container else False),
-        container=container,
-    )
+        client.module.exit_json(
+            changed=False,
+            exists=(True if container else False),
+            container=container,
+        )
+    except DockerException as e:
+        client.fail('An unexpected docker error occurred: {0}'.format(e), exception=traceback.format_exc())
 
 
 if __name__ == '__main__':

lib/ansible/modules/cloud/docker/docker_host_info.py

@@ -185,11 +185,13 @@ disk_usage:
 
 '''
 
+import traceback
+
 from ansible.module_utils.docker.common import AnsibleDockerClient, DockerBaseClass
 from ansible.module_utils._text import to_native
 
 try:
-    from docker.errors import APIError
+    from docker.errors import DockerException, APIError
 except ImportError:
     # Missing Docker SDK for Python handled in ansible.module_utils.docker.common
     pass
@@ -321,12 +323,15 @@ def main():
     )
     client.fail_results['can_talk_to_docker'] = True
 
-    results = dict(
-        changed=False,
-    )
+    try:
+        results = dict(
+            changed=False,
+        )
 
-    DockerHostManager(client, results)
-    client.module.exit_json(**results)
+        DockerHostManager(client, results)
+        client.module.exit_json(**results)
+    except DockerException as e:
+        client.fail('An unexpected docker error occurred: {0}'.format(e), exception=traceback.format_exc())
 
 
 if __name__ == '__main__':

lib/ansible/modules/cloud/docker/docker_image.py

@@ -410,8 +410,10 @@ image:
     type: dict
     sample: {}
 '''
+
 import os
 import re
+import traceback
 
 from distutils.version import LooseVersion
 
@@ -427,6 +429,7 @@ if docker_version is not None:
         else:
             from docker.auth.auth import resolve_repository_name
         from docker.utils.utils import parse_repository_tag
+        from docker.errors import DockerException
     except ImportError:
         # missing Docker SDK for Python handled in module_utils.docker.common
         pass
@@ -914,14 +917,17 @@ def main():
                            'use the "force_source", "force_absent" or "force_tag" option '
                            'instead, depending on what you want to force.')
 
-    results = dict(
-        changed=False,
-        actions=[],
-        image={}
-    )
+    try:
+        results = dict(
+            changed=False,
+            actions=[],
+            image={}
+        )
 
-    ImageManager(client, results)
-    client.module.exit_json(**results)
+        ImageManager(client, results)
+        client.module.exit_json(**results)
+    except DockerException as e:
+        client.fail('An unexpected docker error occurred: {0}'.format(e), exception=traceback.format_exc())
 
 
 if __name__ == '__main__':

lib/ansible/modules/cloud/docker/docker_image_info.py

@@ -154,8 +154,11 @@ images:
     ]
 '''
 
+import traceback
+
 try:
     from docker import utils
+    from docker.errors import DockerException
 except ImportError:
     # missing Docker SDK for Python handled in ansible.module_utils.docker.common
     pass
@@ -234,13 +237,16 @@ def main():
     if client.module._name == 'docker_image_facts':
         client.module.deprecate("The 'docker_image_facts' module has been renamed to 'docker_image_info'", version='2.12')
 
-    results = dict(
-        changed=False,
-        images=[]
-    )
+    try:
+        results = dict(
+            changed=False,
+            images=[]
+        )
 
-    ImageManager(client, results)
-    client.module.exit_json(**results)
+        ImageManager(client, results)
+        client.module.exit_json(**results)
+    except DockerException as e:
+        client.fail('An unexpected docker error occurred: {0}'.format(e), exception=traceback.format_exc())
 
 
 if __name__ == '__main__':

lib/ansible/modules/cloud/docker/docker_login.py

@@ -129,6 +129,13 @@ import base64
 import json
 import os
 import re
+import traceback
+
+try:
+    from docker.errors import DockerException
+except ImportError:
+    # missing Docker SDK for Python handled in ansible.module_utils.docker.common
+    pass
 
 from ansible.module_utils._text import to_bytes, to_text
 from ansible.module_utils.docker.common import AnsibleDockerClient, DEFAULT_DOCKER_REGISTRY, DockerBaseClass, EMAIL_REGEX
@@ -311,16 +318,19 @@ def main():
         min_docker_api_version='1.20',
     )
 
-    results = dict(
-        changed=False,
-        actions=[],
-        login_result={}
-    )
+    try:
+        results = dict(
+            changed=False,
+            actions=[],
+            login_result={}
+        )
 
-    LoginManager(client, results)
-    if 'actions' in results:
-        del results['actions']
-    client.module.exit_json(**results)
+        LoginManager(client, results)
+        if 'actions' in results:
+            del results['actions']
+        client.module.exit_json(**results)
+    except DockerException as e:
+        client.fail('An unexpected docker error occurred: {0}'.format(e), exception=traceback.format_exc())
 
 
 if __name__ == '__main__':

lib/ansible/modules/cloud/docker/docker_network.py

@@ -276,6 +276,7 @@ network:
 '''
 
 import re
+import traceback
 
 from distutils.version import LooseVersion
 
@@ -289,6 +290,7 @@ from ansible.module_utils.docker.common import (
 
 try:
     from docker import utils
+    from docker.errors import DockerException
     if LooseVersion(docker_version) >= LooseVersion('2.0.0'):
         from docker.types import IPAMPool, IPAMConfig
 except Exception:
@@ -681,8 +683,11 @@ def main():
         option_minimal_versions=option_minimal_versions,
     )
 
-    cm = DockerNetworkManager(client)
-    client.module.exit_json(**cm.results)
+    try:
+        cm = DockerNetworkManager(client)
+        client.module.exit_json(**cm.results)
+    except DockerException as e:
+        client.fail('An unexpected docker error occurred: {0}'.format(e), exception=traceback.format_exc())
 
 
 if __name__ == '__main__':

lib/ansible/modules/cloud/docker/docker_network_info.py

@@ -103,6 +103,14 @@ network:
     }'
 '''
 
+import traceback
+
+try:
+    from docker.errors import DockerException
+except ImportError:
+    # missing Docker SDK for Python handled in ansible.module_utils.docker.common
+    pass
+
 from ansible.module_utils.docker.common import AnsibleDockerClient
 
 
@@ -117,13 +125,16 @@ def main():
         min_docker_api_version='1.21',
     )
 
-    network = client.get_network(client.module.params['name'])
+    try:
+        network = client.get_network(client.module.params['name'])
 
-    client.module.exit_json(
-        changed=False,
-        exists=(True if network else False),
-        network=network,
-    )
+        client.module.exit_json(
+            changed=False,
+            exists=(True if network else False),
+            network=network,
+        )
+    except DockerException as e:
+        client.fail('An unexpected docker error occurred: {0}'.format(e), exception=traceback.format_exc())
 
 
 if __name__ == '__main__':

lib/ansible/modules/cloud/docker/docker_node.py

@@ -129,8 +129,10 @@ node:
 
 '''
 
+import traceback
+
 try:
-    from docker.errors import APIError
+    from docker.errors import DockerException, APIError
 except ImportError:
     # missing Docker SDK for Python handled in ansible.module_utils.docker.common
     pass
@@ -277,12 +279,15 @@ def main():
         min_docker_api_version='1.25',
     )
 
-    results = dict(
-        changed=False,
-    )
+    try:
+        results = dict(
+            changed=False,
+        )
 
-    SwarmNodeManager(client, results)
-    client.module.exit_json(**results)
+        SwarmNodeManager(client, results)
+        client.module.exit_json(**results)
+    except DockerException as e:
+        client.fail('An unexpected docker error occurred: {0}'.format(e), exception=traceback.format_exc())
 
 
 if __name__ == '__main__':

lib/ansible/modules/cloud/docker/docker_node_info.py

@@ -87,10 +87,12 @@ nodes:
     type: list
 '''
 
+import traceback
+
 from ansible.module_utils.docker.swarm import AnsibleDockerSwarmClient
 
 try:
-    from docker.errors import APIError, NotFound
+    from docker.errors import DockerException, APIError, NotFound
 except ImportError:
     # missing Docker SDK for Python handled in ansible.module_utils.docker.common
     pass
@@ -136,12 +138,15 @@ def main():
 
     client.fail_task_if_not_swarm_manager()
 
-    nodes = get_node_facts(client)
+    try:
+        nodes = get_node_facts(client)
 
-    client.module.exit_json(
-        changed=False,
-        nodes=nodes,
-    )
+        client.module.exit_json(
+            changed=False,
+            nodes=nodes,
+        )
+    except DockerException as e:
+        client.fail('An unexpected docker error occurred: {0}'.format(e), exception=traceback.format_exc())
 
 
 if __name__ == '__main__':

lib/ansible/modules/cloud/docker/docker_prune.py

@@ -177,6 +177,14 @@ builder_cache_space_reclaimed:
     sample: '0'
 '''
 
+import traceback
+
+try:
+    from docker.errors import DockerException
+except ImportError:
+    # missing Docker SDK for Python handled in ansible.module_utils.docker.common
+    pass
+
 from distutils.version import LooseVersion
 
 from ansible.module_utils.docker.common import AnsibleDockerClient
@@ -214,36 +222,39 @@ def main():
         msg = "Error: Docker SDK for Python's version is %s. Minimum version required for builds option is %s. Use `pip install --upgrade docker` to upgrade."
         client.fail(msg % (docker_version, cache_min_version))
 
-    result = dict()
+    try:
+        result = dict()
 
-    if client.module.params['containers']:
-        filters = clean_dict_booleans_for_docker_api(client.module.params.get('containers_filters'))
-        res = client.prune_containers(filters=filters)
-        result['containers'] = res.get('ContainersDeleted') or []
-        result['containers_space_reclaimed'] = res['SpaceReclaimed']
+        if client.module.params['containers']:
+            filters = clean_dict_booleans_for_docker_api(client.module.params.get('containers_filters'))
+            res = client.prune_containers(filters=filters)
+            result['containers'] = res.get('ContainersDeleted') or []
+            result['containers_space_reclaimed'] = res['SpaceReclaimed']
 
-    if client.module.params['images']:
-        filters = clean_dict_booleans_for_docker_api(client.module.params.get('images_filters'))
-        res = client.prune_images(filters=filters)
-        result['images'] = res.get('ImagesDeleted') or []
-        result['images_space_reclaimed'] = res['SpaceReclaimed']
+        if client.module.params['images']:
+            filters = clean_dict_booleans_for_docker_api(client.module.params.get('images_filters'))
+            res = client.prune_images(filters=filters)
+            result['images'] = res.get('ImagesDeleted') or []
+            result['images_space_reclaimed'] = res['SpaceReclaimed']
 
-    if client.module.params['networks']:
-        filters = clean_dict_booleans_for_docker_api(client.module.params.get('networks_filters'))
-        res = client.prune_networks(filters=filters)
-        result['networks'] = res.get('NetworksDeleted') or []
+        if client.module.params['networks']:
+            filters = clean_dict_booleans_for_docker_api(client.module.params.get('networks_filters'))
+            res = client.prune_networks(filters=filters)
+            result['networks'] = res.get('NetworksDeleted') or []
 
-    if client.module.params['volumes']:
-        filters = clean_dict_booleans_for_docker_api(client.module.params.get('volumes_filters'))
-        res = client.prune_volumes(filters=filters)
-        result['volumes'] = res.get('VolumesDeleted') or []
-        result['volumes_space_reclaimed'] = res['SpaceReclaimed']
+        if client.module.params['volumes']:
+            filters = clean_dict_booleans_for_docker_api(client.module.params.get('volumes_filters'))
+            res = client.prune_volumes(filters=filters)
+            result['volumes'] = res.get('VolumesDeleted') or []
+            result['volumes_space_reclaimed'] = res['SpaceReclaimed']
 
-    if client.module.params['builder_cache']:
-        res = client.prune_builds()
-        result['builder_cache_space_reclaimed'] = res['SpaceReclaimed']
+        if client.module.params['builder_cache']:
+            res = client.prune_builds()
+            result['builder_cache_space_reclaimed'] = res['SpaceReclaimed']
 
-    client.module.exit_json(**result)
+        client.module.exit_json(**result)
+    except DockerException as e:
+        client.fail('An unexpected docker error occurred: {0}'.format(e), exception=traceback.format_exc())
 
 
 if __name__ == '__main__':

lib/ansible/modules/cloud/docker/docker_secret.py

@@ -152,9 +152,10 @@ secret_id:
 
 import base64
 import hashlib
+import traceback
 
 try:
-    from docker.errors import APIError
+    from docker.errors import DockerException, APIError
 except ImportError:
     # missing Docker SDK for Python handled in ansible.module_utils.docker.common
     pass
@@ -281,13 +282,16 @@ def main():
         min_docker_api_version='1.25',
     )
 
-    results = dict(
-        changed=False,
-        secret_id=''
-    )
+    try:
+        results = dict(
+            changed=False,
+            secret_id=''
+        )
 
-    SecretManager(client, results)()
-    client.module.exit_json(**results)
+        SecretManager(client, results)()
+        client.module.exit_json(**results)
+    except DockerException as e:
+        client.fail('An unexpected docker error occurred: {0}'.format(e), exception=traceback.format_exc())
 
 
 if __name__ == '__main__':

lib/ansible/modules/cloud/docker/docker_swarm.py

@@ -267,9 +267,10 @@ actions:
 '''
 
 import json
+import traceback
 
 try:
-    from docker.errors import APIError
+    from docker.errors import DockerException, APIError
 except ImportError:
     # missing Docker SDK for Python handled in ansible.module_utils.docker.common
     pass
@@ -659,14 +660,17 @@ def main():
         option_minimal_versions=option_minimal_versions,
     )
 
-    results = dict(
-        changed=False,
-        result='',
-        actions=[]
-    )
+    try:
+        results = dict(
+            changed=False,
+            result='',
+            actions=[]
+        )
 
-    SwarmManager(client, results)()
-    client.module.exit_json(**results)
+        SwarmManager(client, results)()
+        client.module.exit_json(**results)
+    except DockerException as e:
+        client.fail('An unexpected docker error occurred: {0}'.format(e), exception=traceback.format_exc())
 
 
 if __name__ == '__main__':

lib/ansible/modules/cloud/docker/docker_swarm_info.py

@@ -192,8 +192,10 @@ tasks:
 
 '''
 
+import traceback
+
 try:
-    from docker.errors import APIError, NotFound
+    from docker.errors import DockerException, APIError, NotFound
 except ImportError:
     # missing Docker SDK for Python handled in ansible.module_utils.docker_common
     pass
@@ -361,13 +363,16 @@ def main():
     client.fail_results['docker_swarm_active'] = client.check_if_swarm_node()
     client.fail_results['docker_swarm_manager'] = client.check_if_swarm_manager()
 
-    results = dict(
-        changed=False,
-    )
+    try:
+        results = dict(
+            changed=False,
+        )
 
-    DockerSwarmManager(client, results)
-    results.update(client.fail_results)
-    client.module.exit_json(**results)
+        DockerSwarmManager(client, results)
+        results.update(client.fail_results)
+        client.module.exit_json(**results)
+    except DockerException as e:
+        client.fail('An unexpected docker error occurred: {0}'.format(e), exception=traceback.format_exc())
 
 
 if __name__ == '__main__':

lib/ansible/modules/cloud/docker/docker_swarm_service.py

@@ -1046,6 +1046,7 @@ EXAMPLES = '''
 import shlex
 import time
 import operator
+import traceback
 
 from distutils.version import LooseVersion
 
@@ -2740,21 +2741,24 @@ def main():
         option_minimal_versions=option_minimal_versions,
     )
 
-    dsm = DockerServiceManager(client)
-    msg, changed, rebuilt, changes, facts = dsm.run_safe()
+    try:
+        dsm = DockerServiceManager(client)
+        msg, changed, rebuilt, changes, facts = dsm.run_safe()
 
-    results = dict(
-        msg=msg,
-        changed=changed,
-        rebuilt=rebuilt,
-        changes=changes,
-        swarm_service=facts,
-    )
-    if client.module._diff:
-        before, after = dsm.diff_tracker.get_before_after()
-        results['diff'] = dict(before=before, after=after)
+        results = dict(
+            msg=msg,
+            changed=changed,
+            rebuilt=rebuilt,
+            changes=changes,
+            swarm_service=facts,
+        )
+        if client.module._diff:
+            before, after = dsm.diff_tracker.get_before_after()
+            results['diff'] = dict(before=before, after=after)
 
-    client.module.exit_json(**results)
+        client.module.exit_json(**results)
+    except DockerException as e:
+        client.fail('An unexpected docker error occurred: {0}'.format(e), exception=traceback.format_exc())
 
 
 if __name__ == '__main__':

lib/ansible/modules/cloud/docker/docker_swarm_service_info.py

@@ -66,6 +66,14 @@ service:
     type: dict
 '''
 
+import traceback
+
+try:
+    from docker.errors import DockerException
+except ImportError:
+    # missing Docker SDK for Python handled in ansible.module_utils.docker.common
+    pass
+
 from ansible.module_utils.docker.swarm import AnsibleDockerSwarmClient
 
 
@@ -91,13 +99,16 @@ def main():
 
     client.fail_task_if_not_swarm_manager()
 
-    service = get_service_info(client)
+    try:
+        service = get_service_info(client)
 
-    client.module.exit_json(
-        changed=False,
-        service=service,
-        exists=bool(service)
-    )
+        client.module.exit_json(
+            changed=False,
+            service=service,
+            exists=bool(service)
+        )
+    except DockerException as e:
+        client.fail('An unexpected docker error occurred: {0}'.format(e), exception=traceback.format_exc())
 
 
 if __name__ == '__main__':

lib/ansible/modules/cloud/docker/docker_volume.py

@@ -125,8 +125,10 @@ volume:
     sample: {}
 '''
 
+import traceback
+
 try:
-    from docker.errors import APIError
+    from docker.errors import DockerException, APIError
 except ImportError:
     # missing Docker SDK for Python handled in ansible.module_utils.docker.common
     pass
@@ -323,8 +325,11 @@ def main():
         option_minimal_versions=option_minimal_versions,
     )
 
-    cm = DockerVolumeManager(client)
-    client.module.exit_json(**cm.results)
+    try:
+        cm = DockerVolumeManager(client)
+        client.module.exit_json(**cm.results)
+    except DockerException as e:
+        client.fail('An unexpected docker error occurred: {0}'.format(e), exception=traceback.format_exc())
 
 
 if __name__ == '__main__':

lib/ansible/modules/cloud/docker/docker_volume_info.py

@@ -80,8 +80,10 @@ volume:
         }'
 '''
 
+import traceback
+
 try:
-    from docker.errors import NotFound
+    from docker.errors import DockerException, NotFound
 except ImportError:
     # missing Docker SDK for Python handled in ansible.module_utils.docker.common
     pass
@@ -110,13 +112,16 @@ def main():
         min_docker_api_version='1.21',
     )
 
-    volume = get_existing_volume(client, client.module.params['name'])
+    try:
+        volume = get_existing_volume(client, client.module.params['name'])
 
-    client.module.exit_json(
-        changed=False,
-        exists=(True if volume else False),
-        volume=volume,
-    )
+        client.module.exit_json(
+            changed=False,
+            exists=(True if volume else False),
+            volume=volume,
+        )
+    except DockerException as e:
+        client.fail('An unexpected docker error occurred: {0}'.format(e), exception=traceback.format_exc())
 
 
 if __name__ == '__main__':