docker_container: fix port bindings with IPv6 addresses (#59715)

* Pass IPv6 addresses for port bindings without square brackets.

* Add changelog.

* Add test.

changelogs/fragments/59715-docker_container-ipv6-port-bind.yml

@@ -0,0 +1,2 @@
+bugfixes:
+- "docker_container - fix port bindings with IPv6 addresses."

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

@@ -1453,13 +1453,16 @@ class TaskParameters(DockerBaseClass):
                 port_binds = [(default_ip, port) for port in parse_port_range(parts[0], self.client)]
             elif p_len == 3:
                 # We only allow IPv4 and IPv6 addresses for the bind address
-                if not re.match(r'^[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+$', parts[0]) and not re.match(r'^\[[0-9a-fA-F:]+\]$', parts[0]):
+                ipaddr = parts[0]
+                if not re.match(r'^[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+$', parts[0]) and not re.match(r'^\[[0-9a-fA-F:]+\]$', ipaddr):
                     self.fail(('Bind addresses for published ports must be IPv4 or IPv6 addresses, not hostnames. '
-                               'Use the dig lookup to resolve hostnames. (Found hostname: {0})').format(parts[0]))
+                               'Use the dig lookup to resolve hostnames. (Found hostname: {0})').format(ipaddr))
+                if re.match(r'^\[[0-9a-fA-F:]+\]$', ipaddr):
+                    ipaddr = ipaddr[1:-1]
                 if parts[1]:
-                    port_binds = [(parts[0], port) for port in parse_port_range(parts[1], self.client)]
+                    port_binds = [(ipaddr, port) for port in parse_port_range(parts[1], self.client)]
                 else:
-                    port_binds = len(container_ports) * [(parts[0],)]
+                    port_binds = len(container_ports) * [(ipaddr,)]
 
             for bind, container_port in zip(port_binds, container_ports):
                 idx = '{0}/{1}'.format(container_port, protocol) if protocol else container_port

test/integration/targets/docker_container/tasks/tests/options.yml

@@ -2804,6 +2804,18 @@ avoid such warnings, please quote the value.' in log_options_2.warnings"
     force_kill: yes
   register: published_ports_4
 
+- name: published_ports (ports with IP addresses)
+  docker_container:
+    image: alpine:3.8
+    command: '/bin/sh -c "sleep 10m"'
+    name: "{{ cname }}"
+    state: started
+    published_ports:
+    - '127.0.0.1:9002:9002/tcp'
+    - '[::1]:9003:9003/tcp'
+    force_kill: yes
+  register: published_ports_5
+
 - name: cleanup
   docker_container:
     name: "{{ cname }}"
@@ -2817,6 +2829,7 @@ avoid such warnings, please quote the value.' in log_options_2.warnings"
     - published_ports_2 is not changed
     - published_ports_3 is not changed
     - published_ports_4 is changed
+    - published_ports_5 is changed
 
 ####################################################################
 ## pull ############################################################