Docker swarm service integration tests (#45674)

* integration test for docker_swarm_service

* ensure stack de-initialization

* Set default value for 'configs' parameter to None

Docker-py uses None as a default value for configs.
Using the same default here allows to create services on older docker
setups (docker_api<1.30).

* Set default value for 'update_order' parameter to None

Docker-py uses None as a default value for update_order.
Using the same default here allows to create services on older docker
setups (docker_api<1.29)

* Set default value for 'publish.mode' parameter to None

Docker-py uses None as a default value for publish_mode.
Using the same default here allows to create services on older docker
setups (docker_api<1.32)

* Allow tests to run on older version of docker.

* remove workarounds for old docker versions

* test correct swarm cleanup

* changelog fragment for docker_swarm_service defaults change

changelogs/fragments/docker-swarm-service-defaults.yml

@@ -0,0 +1,2 @@
+minor_changes:
+- change default value for ``configs`` from ``[]`` to ``null`` and for ``update_order`` from ``stop-first`` to ``null``, matching docker API and allowing the module to interact with older docker daemons.

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

@@ -177,7 +177,7 @@ options:
     - List of dictionaries describing the service configs.
     - Every item must be a dictionary exposing the keys config_id, config_name, filename, uid (defaults to 0), gid (defaults to 0), mode (defaults to 0o444)
     - Maps docker service --config option.
-    default: []
+    default: null
   networks:
     required: false
     default: []
@@ -189,8 +189,9 @@ options:
     required: false
     description:
     - List of dictionaries describing the service published ports.
-    - Every item must be a dictionary exposing the keys published_port, target_port, protocol (defaults to 'tcp'), mode <ingress|host>, default to ingress.
+    - Every item must be a dictionary exposing the keys published_port, target_port, protocol (defaults to 'tcp')
     - Only used with api_version >= 1.25
+    - If api_version >= 1.32 the dictionaries can contain the attribute 'mode' set to 'ingress' or 'host' (default 'ingress').
   replicas:
     required: false
     default: -1
@@ -262,13 +263,11 @@ options:
     - Maps to docker service --update-max-failure-ratio
   update_order:
     required: false
-    default: stop-first
+    default: null
     description:
     - Specifies the order of operations when rolling out an updated task.
     - Maps to docker service --update-order
-    choices:
-    - stop-first
-    - start-first
+    - Requires docker api version >= 1.29
   user:
     required: false
     default: root
@@ -496,7 +495,7 @@ class DockerService(DockerBaseClass):
         self.mode = "replicated"
         self.user = "root"
         self.mounts = []
-        self.configs = []
+        self.configs = None
         self.secrets = []
         self.constraints = []
         self.networks = []
@@ -513,7 +512,7 @@ class DockerService(DockerBaseClass):
         self.update_failure_action = "continue"
         self.update_monitor = 5000000000
         self.update_max_failure_ratio = 0.00
-        self.update_order = "stop-first"
+        self.update_order = None
 
     def get_facts(self):
         return {
@@ -608,13 +607,13 @@ class DockerService(DockerBaseClass):
         for param_p in ap['publish']:
             service_p = {}
             service_p['protocol'] = param_p.get('protocol', 'tcp')
-            service_p['mode'] = param_p.get('mode', 'ingress')
+            service_p['mode'] = param_p.get('mode', None)
             service_p['published_port'] = int(param_p['published_port'])
             service_p['target_port'] = int(param_p['target_port'])
             if service_p['protocol'] not in ['tcp', 'udp']:
                 raise ValueError("got publish.protocol '%s', valid values:'tcp', 'udp'" %
                                  service_p['protocol'])
-            if service_p['mode'] not in ['ingress', 'host']:
+            if service_p['mode'] not in [None, 'ingress', 'host']:
                 raise ValueError("got publish.mode '%s', valid values:'ingress', 'host'" %
                                  service_p['mode'])
             s.publish.append(service_p)
@@ -627,6 +626,8 @@ class DockerService(DockerBaseClass):
             service_m['target'] = param_m['target']
             s.mounts.append(service_m)
 
+        s.configs = None
+        if ap['configs']:
             s.configs = []
             for param_m in ap['configs']:
                 service_c = {}
@@ -754,6 +755,8 @@ class DockerService(DockerBaseClass):
                             read_only=mount_config['readonly'])
             )
 
+        configs = None
+        if self.configs:
             configs = []
             for config_config in self.configs:
                 configs.append(
@@ -766,6 +769,7 @@ class DockerService(DockerBaseClass):
                         mode=config_config.get('mode')
                     )
                 )
+
         secrets = []
         for secret_config in self.secrets:
             secrets.append(
@@ -846,7 +850,10 @@ class DockerService(DockerBaseClass):
 
         ports = {}
         for port in self.publish:
+            if port['mode']:
                 ports[int(port['published_port'])] = (int(port['target_port']), port['protocol'], port['mode'])
+            else:
+                ports[int(port['published_port'])] = (int(port['target_port']), port['protocol'])
         endpoint_spec = types.EndpointSpec(mode=self.endpoint_mode, ports=ports)
         return update_policy, task_template, networks, endpoint_spec, mode, self.labels
 
@@ -883,6 +890,8 @@ class DockerServiceManager():
         ds.update_failure_action = update_config_data['FailureAction']
         ds.update_monitor = update_config_data['Monitor']
         ds.update_max_failure_ratio = update_config_data['MaxFailureRatio']
+
+        if 'Order' in update_config_data:
             ds.update_order = update_config_data['Order']
 
         dns_config = task_template_data['ContainerSpec'].get('DNSConfig', None)
@@ -913,7 +922,7 @@ class DockerServiceManager():
                 for port in raw_data_endpoint_spec.get('Ports', []):
                     ds.publish.append({
                         'protocol': port['Protocol'],
-                        'mode': port.get('PublishMode', 'ingress'),
+                        'mode': port.get('PublishMode', None),
                         'published_port': int(port['PublishedPort']),
                         'target_port': int(port['TargetPort'])})
 
@@ -1019,7 +1028,8 @@ class DockerServiceManager():
             {'param': 'hostname', 'attribute': 'hostname', 'min_version': '1.25'},
             {'param': 'tty', 'attribute': 'tty', 'min_version': '1.25'},
             {'param': 'secrets', 'attribute': 'secrets', 'min_version': '1.25'},
-            {'param': 'configs', 'attribute': 'configs', 'min_version': '1.30'}]
+            {'param': 'configs', 'attribute': 'configs', 'min_version': '1.30'},
+            {'param': 'update_order', 'attribute': 'update_order', 'min_version': '1.29'}]
         params = self.client.module.params
         empty_service = DockerService()
         for pv in parameters_versions:
@@ -1113,7 +1123,7 @@ def main():
         image=dict(type='str'),
         state=dict(default="present", choices=['present', 'absent']),
         mounts=dict(default=[], type='list'),
-        configs=dict(default=[], type='list'),
+        configs=dict(default=None, type='list'),
         secrets=dict(default=[], type='list'),
         networks=dict(default=[], type='list'),
         args=dict(default=[], type='list'),
@@ -1146,7 +1156,7 @@ def main():
         update_failure_action=dict(default='continue', choices=['continue', 'pause']),
         update_monitor=dict(default=5000000000, type='int'),
         update_max_failure_ratio=dict(default=0, type='float'),
-        update_order=dict(default='stop-first', choices=['stop-first', 'start-first']),
+        update_order=dict(default=None, type='string'),
         user=dict(default='root'))
     required_if = [
         ('state', 'present', ['image'])

test/integration/targets/docker_swarm_service/aliases

@@ -0,0 +1,4 @@
+shippable/posix/group2
+skip/osx
+skip/freebsd
+destructive

test/integration/targets/docker_swarm_service/meta/main.yml

@@ -0,0 +1,3 @@
+---
+dependencies:
+  - setup_docker

test/integration/targets/docker_swarm_service/tasks/main.yml

@@ -0,0 +1,4 @@
+- include_tasks: test_swarm_service.yml
+  when:
+  - ansible_os_family != 'RedHat' or ansible_distribution_major_version != '6'
+  - ansible_distribution != 'Fedora' or ansible_distribution_major_version|int >= 26

test/integration/targets/docker_swarm_service/tasks/test_swarm_service.yml

@@ -0,0 +1,122 @@
+- name: Create a Swarm cluster
+  docker_swarm:
+    state: present
+    advertise_addr: "{{ansible_default_ipv4.address}}"
+
+- name: Create a swarm service without name
+  register: output
+  docker_swarm_service:
+    state: present
+  ignore_errors: yes
+
+- name: assert failure when name not set
+  assert:
+    that:
+    - output is failed
+    - 'output.msg == "missing required arguments: name"'
+
+- name: Remove an non-existing service
+  register: output
+  docker_swarm_service:
+    state: absent
+    name: non_existing_service
+
+- name: assert output not changed when deleting non-existing service
+  assert:
+    that:
+    - output is not changed
+
+- name: create sample service
+  register: output
+  docker_swarm_service:
+    name: test_service
+    endpoint_mode: dnsrr
+    image: busybox
+    args:
+    - sleep
+    - "3600"
+
+- name: assert sample service is created
+  assert:
+    that:
+    - output is changed
+
+- name: change service args
+  register: output
+  docker_swarm_service:
+    name: test_service
+    image: busybox
+    args:
+    - sleep
+    - "1800"
+
+- name: assert service args are correct
+  assert:
+    that:
+    - output.ansible_docker_service.args == ['sleep', '1800']
+
+- name: set service mode to global
+  register: output
+  docker_swarm_service:
+    name: test_service
+    image: busybox
+    endpoint_mode: vip
+    mode: global
+    args:
+    - sleep
+    - "1800"
+
+- name: assert service mode changed caused service rebuild
+  assert:
+    that:
+    - output.rebuilt
+
+- name: add published ports to service
+  register: output
+  docker_swarm_service:
+    name: test_service
+    image: busybox
+    mode: global
+    args:
+    - sleep
+    - "1800"
+    endpoint_mode: vip
+    publish:
+    - protocol: tcp
+      published_port: 60001
+      target_port: 60001
+    - protocol: udp
+      published_port: 60001
+      target_port: 60001
+
+- name: assert service matches expectations
+  assert:
+    that:
+    - output.ansible_docker_service == service_expected_output
+
+- name: delete sample service
+  register: output
+  docker_swarm_service:
+    name: test_service
+    state: absent
+
+- name: assert service deletion returns changed
+  assert:
+    that:
+    - output is success
+    - output is changed
+
+- name: Remove the Swarm cluster
+  docker_swarm:
+    state: absent
+    force: true
+
+- name: Try reitializing the swarm cluster
+  docker_swarm:
+    state: present
+    advertise_addr: "{{ansible_default_ipv4.address}}"
+
+- name: Clean the docker daemon status
+  docker_swarm:
+    state: absent
+    force: true

test/integration/targets/docker_swarm_service/vars/main.yml

@@ -0,0 +1,38 @@
+service_expected_output:
+  args: [sleep, '1800']
+  configs: null
+  constraints: []
+  container_labels: {}
+  dns: []
+  dns_options: []
+  dns_search: []
+  endpoint_mode: vip
+  env: []
+  force_update: null
+  hostname: ''
+  image: busybox
+  labels: {}
+  limit_cpu: 0.0
+  limit_memory: 0
+  log_driver: json-file
+  log_driver_options: {}
+  mode: global
+  mounts: []
+  networks: []
+  publish:
+  - {mode: null, protocol: tcp, published_port: 60001, target_port: 60001}
+  - {mode: null, protocol: udp, published_port: 60001, target_port: 60001}
+  replicas: null
+  reserve_cpu: 0.0
+  reserve_memory: 0
+  restart_policy: none
+  restart_policy_attempts: 0
+  restart_policy_delay: 0
+  restart_policy_window: 0
+  tty: false
+  update_delay: 10
+  update_failure_action: continue
+  update_max_failure_ratio: 0.0
+  update_monitor: 5000000000
+  update_order: null
+  update_parallelism: 1