#!/usr/bin/python # # (c) 2019 Piotr Wojciechowski # GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt) from __future__ import absolute_import, division, print_function __metaclass__ = type ANSIBLE_METADATA = {'metadata_version': '1.1', 'status': ['preview'], 'supported_by': 'community'} DOCUMENTATION = ''' --- module: docker_swarm_facts short_description: Retrieves facts about Docker Swarm cluster. description: - Retrieves facts about a Docker Swarm. - Returns lists of swarm objects names for the services - nodes, services, tasks. - The output differs depending on API version available on docker host. - Must be run on Swarm Manager node; otherwise module fails with error message. It does return boolean flags in on both error and success which indicate whether the docker daemon can be communicated with, whether it is in Swarm mode, and whether it is a Swarm Manager node. version_added: "2.8" author: - Piotr Wojciechowski (@wojciechowskipiotr) options: nodes: description: - Whether to list swarm nodes. type: bool default: no nodes_filters: description: - A dictionary of filter values used for selecting nodes to list. - "For example, C(name: mynode)." - See L(the docker documentation,https://docs.docker.com/engine/reference/commandline/node_ls/#filtering) for more information on possible filters. type: dict services: description: - Whether to list swarm services. type: bool default: no services_filters: description: - A dictionary of filter values used for selecting services to list. - "For example, C(name: myservice)." - See L(the docker documentation,https://docs.docker.com/engine/reference/commandline/service_ls/#filtering) for more information on possible filters. type: dict tasks: description: - Whether to list containers. type: bool default: no tasks_filters: description: - A dictionary of filter values used for selecting tasks to list. - "For example, C(node: mynode-1)." - See L(the docker documentation,https://docs.docker.com/engine/reference/commandline/service_ps/#filtering) for more information on possible filters. type: dict verbose_output: description: - When set to C(yes) and I(nodes), I(services) or I(tasks) is set to C(yes) then output will contain verbose information about objects matching the full output of API method. For details see the documentation of your version of Docker API at U(https://docs.docker.com/engine/api/). - The verbose output in this module contains only subset of information returned by I(_facts) module for each type of the objects. type: bool default: no extends_documentation_fragment: - docker - docker.docker_py_1_documentation requirements: - "docker-py >= 1.10.0" - "Docker API >= 1.24" ''' EXAMPLES = ''' - name: Get info on Docker Swarm docker_swarm_facts: ignore_errors: yes register: result - name: Inform about basic flags debug: msg: | Was able to talk to docker daemon: {{ result.can_talk_to_docker }} Docker in Swarm mode: {{ result.docker_swarm_active }} This is a Manager node: {{ result.docker_swarm_manager }} - block: - name: Get info on Docker Swarm and list of registered nodes docker_swarm_facts: nodes: yes register: result - name: Get info on Docker Swarm and extended list of registered nodes docker_swarm_facts: nodes: yes verbose_output: yes register: result - name: Get info on Docker Swarm and filtered list of registered nodes docker_swarm_facts: nodes: yes nodes_filter: name: mynode register: result - debug: var: result.docker_swarm_facts ''' RETURN = ''' can_talk_to_docker: description: - Will be C(true) if the module can talk to the docker daemon. returned: both on success and on error type: bool docker_swarm_active: description: - Will be C(true) if the module can talk to the docker daemon, and the docker daemon is in Swarm mode. returned: both on success and on error type: bool docker_swarm_manager: description: - Will be C(true) if the module can talk to the docker daemon, the docker daemon is in Swarm mode, and the current node is a manager node. - Only if this one is C(true), the module will not fail. returned: both on success and on error type: bool docker_swarm_facts: description: - Facts representing the basic state of the docker Swarm cluster. - Contains tokens to connect to the Swarm returned: always type: dict docker_nodes_list: description: - List of dict objects containing the basic information about each volume. Keys matches the C(docker node ls) output unless I(verbose_output=yes). See description for I(verbose_output). returned: When I(nodes) is C(yes) type: list docker_services_list: description: - List of dict objects containing the basic information about each volume. Keys matches the C(docker service ls) output unless I(verbose_output=yes). See description for I(verbose_output). returned: When I(services) is C(yes) type: list docker_tasks_list: description: - List of dict objects containing the basic information about each volume. Keys matches the C(docker service ps) output unless I(verbose_output=yes). See description for I(verbose_output). returned: When I(tasks) is C(yes) type: list ''' try: from docker.errors import APIError, NotFound except ImportError: # missing docker-py handled in ansible.module_utils.docker_common pass from ansible.module_utils._text import to_native from ansible.module_utils.docker.swarm import AnsibleDockerSwarmClient from ansible.module_utils.docker.common import DockerBaseClass, clean_dict_booleans_for_docker_api class DockerSwarmManager(DockerBaseClass): def __init__(self, client, results): super(DockerSwarmManager, self).__init__() self.client = client self.results = results self.verbose_output = self.client.module.params['verbose_output'] listed_objects = ['tasks', 'services', 'nodes'] self.client.fail_task_if_not_swarm_manager() self.results['docker_swarm_facts'] = self.get_docker_swarm_facts() for docker_object in listed_objects: if self.client.module.params[docker_object]: returned_name = "docker_" + docker_object + "_list" filter_name = docker_object + "_filters" filters = clean_dict_booleans_for_docker_api(client.module.params.get(filter_name)) self.results[returned_name] = self.get_docker_items_list(docker_object, filters) def get_docker_swarm_facts(self): try: return self.client.inspect_swarm() except APIError as exc: self.client.fail("Error inspecting docker swarm: %s" % to_native(exc)) def get_docker_items_list(self, docker_object=None, filters=None): items = None items_list = [] try: if docker_object == 'nodes': items = self.client.nodes(filters=filters) elif docker_object == 'tasks': items = self.client.tasks(filters=filters) elif docker_object == 'services': items = self.client.services(filters=filters) except APIError as exc: self.client.fail("Error inspecting docker swarm for object '%s': %s" % (docker_object, to_native(exc))) if self.verbose_output: return items for item in items: item_record = dict() if docker_object == 'nodes': item_record = self.get_essential_facts_nodes(item) elif docker_object == 'tasks': item_record = self.get_essential_facts_tasks(item) elif docker_object == 'services': item_record = self.get_essential_facts_services(item) if item_record['Mode'] == 'Global': item_record['Replicas'] = len(items) items_list.append(item_record) return items_list @staticmethod def get_essential_facts_nodes(item): object_essentials = dict() object_essentials['ID'] = item.get('ID') object_essentials['Hostname'] = item['Description']['Hostname'] object_essentials['Status'] = item['Status']['State'] object_essentials['Availability'] = item['Spec']['Availability'] if 'ManagerStatus' in item: object_essentials['ManagerStatus'] = item['ManagerStatus']['Reachability'] if 'Leader' in item['ManagerStatus'] and item['ManagerStatus']['Leader'] is True: object_essentials['ManagerStatus'] = "Leader" else: object_essentials['ManagerStatus'] = None object_essentials['EngineVersion'] = item['Description']['Engine']['EngineVersion'] return object_essentials def get_essential_facts_tasks(self, item): object_essentials = dict() object_essentials['ID'] = item['ID'] # Returning container ID to not trigger another connection to host # Container ID is sufficient to get extended info in other tasks object_essentials['ContainerID'] = item['Status']['ContainerStatus']['ContainerID'] object_essentials['Image'] = item['Spec']['ContainerSpec']['Image'] object_essentials['Node'] = self.client.get_node_name_by_id(item['NodeID']) object_essentials['DesiredState'] = item['DesiredState'] object_essentials['CurrentState'] = item['Status']['State'] if 'Err' in item['Status']: object_essentials['Error'] = item['Status']['Err'] else: object_essentials['Error'] = None return object_essentials @staticmethod def get_essential_facts_services(item): object_essentials = dict() object_essentials['ID'] = item['ID'] object_essentials['Name'] = item['Spec']['Name'] if 'Replicated' in item['Spec']['Mode']: object_essentials['Mode'] = "Replicated" object_essentials['Replicas'] = item['Spec']['Mode']['Replicated']['Replicas'] elif 'Global' in item['Spec']['Mode']: object_essentials['Mode'] = "Global" # Number of replicas have to be updated in calling method or may be left as None object_essentials['Replicas'] = None object_essentials['Image'] = item['Spec']['TaskTemplate']['ContainerSpec']['Image'] if 'Ports' in item['Spec']['EndpointSpec']: object_essentials['Ports'] = item['Spec']['EndpointSpec']['Ports'] else: object_essentials['Ports'] = [] return object_essentials def main(): argument_spec = dict( nodes=dict(type='bool', default=False), nodes_filters=dict(type='dict'), tasks=dict(type='bool', default=False), tasks_filters=dict(type='dict'), services=dict(type='bool', default=False), services_filters=dict(type='dict'), verbose_output=dict(type='bool', default=False), ) client = AnsibleDockerSwarmClient( argument_spec=argument_spec, supports_check_mode=True, min_docker_version='1.10.0', min_docker_api_version='1.24', fail_results=dict( can_talk_to_docker=False, docker_swarm_active=False, docker_swarm_manager=False, ), ) client.fail_results['can_talk_to_docker'] = True 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, docker_swarm_facts=[], ) DockerSwarmManager(client, results) results.update(client.fail_results) client.module.exit_json(**results) if __name__ == '__main__': main()