Implement connection reset. (#312)

changelogs/fragments/312-docker-connection-reset.yml

@@ -0,0 +1,3 @@
+minor_changes:
+- "docker connection plugin - implement connection reset by clearing internal container user cache (https://github.com/ansible-collections/community.docker/pull/312)."
+- "docker_api connection plugin - implement connection reset by clearing internal container user/group ID cache (https://github.com/ansible-collections/community.docker/pull/312)."

plugins/connection/docker.py

@@ -435,3 +435,7 @@ def close(self):
         """ Terminate the connection. Nothing to do for Docker"""
         super(Connection, self).close()
         self._connected = False
+
+    def reset(self):
+        # Clear container user cache
+        self._container_user_cache = {}

plugins/connection/docker_api.py

@@ -383,3 +383,6 @@ def close(self):
         """ Terminate the connection. Nothing to do for Docker"""
         super(Connection, self).close()
         self._connected = False
+
+    def reset(self):
+        self.ids.clear()