Add use_ssh_client flag (#114)

* Add use_ssh_client option.

* Unrelated cleanup (unneeded imports).

* Add SSH connection tests.

plugins/inventory/docker_containers.py

@@ -134,9 +134,7 @@ import re
 
 from ansible.errors import AnsibleError
 from ansible.module_utils._text import to_native
-from ansible_collections.community.docker.plugins.module_utils.common import update_tls_hostname, get_connect_params
 from ansible.plugins.inventory import BaseInventoryPlugin, Constructable
-from ansible.parsing.utils.addresses import parse_address
 
 from ansible_collections.community.docker.plugins.module_utils.common import (
     RequestException,
@@ -146,7 +144,7 @@ from ansible_collections.community.docker.plugins.plugin_utils.common import (
 )
 
 try:
-    from docker.errors import DockerException, APIError, NotFound
+    from docker.errors import DockerException, APIError
 except Exception:
     # missing Docker SDK for Python handled in ansible_collections.community.docker.plugins.module_utils.common
     pass

plugins/inventory/docker_swarm.py

@@ -86,6 +86,13 @@ DOCUMENTATION = '''
             type: int
             default: 60
             aliases: [ time_out ]
+        use_ssh_client:
+            description:
+                - For SSH transports, use the C(ssh) CLI tool instead of paramiko.
+                - Requires Docker SDK for Python 4.4.0 or newer.
+            type: bool
+            default: no
+            version_added: 1.5.0
         include_host_uri:
             description: Toggle to return the additional attribute C(ansible_host_uri) which contains the URI of the
                          swarm leader in format of C(tcp://172.16.0.1:2376). This value may be used without additional
@@ -171,6 +178,7 @@ class InventoryModule(BaseInventoryPlugin, Constructable):
             api_version=self.get_option('api_version'),
             timeout=self.get_option('timeout'),
             ssl_version=self.get_option('ssl_version'),
+            use_ssh_client=self.get_option('use_ssh_client'),
             debug=None,
         )
         update_tls_hostname(raw_params)