issue #150: ansible: add basic Docker support.

ansible_mitogen/connection.py

@@ -160,6 +160,18 @@ class Connection(ansible.plugins.connection.ConnectionBase):
             })
         )
 
+    def _connect_docker(self):
+        return mitogen.service.call(
+            self.parent,
+            ContextService.handle,
+            cast({
+                'method': 'docker',
+                'container': self._play_context.remote_addr,
+                'python_path': self.python_path,
+                'connect_timeout': self._play_context.timeout,
+            })
+        )
+
     def _connect_sudo(self, via=None, python_path=None):
         """
         Fetch a reference to a sudo Context matching the play context from
@@ -212,12 +224,17 @@ class Connection(ansible.plugins.connection.ConnectionBase):
                 self.context = self._connect_sudo(python_path=sys.executable)
             else:
                 self.context = self._connect_local()
-        else:
+            return
+
+        if self.original_transport == 'docker':
+            self.host = self._connect_docker()
+        elif self.original_transport == 'ssh':
             self.host = self._connect_ssh()
-            if self._play_context.become:
-                self.context = self._connect_sudo(via=self.host)
-            else:
-                self.context = self.host
+
+        if self._play_context.become:
+            self.context = self._connect_sudo(via=self.host)
+        else:
+            self.context = self.host
 
     def close(self):
         """

ansible_mitogen/strategy.py

@@ -78,7 +78,7 @@ def wrap_connection_loader__get(name, play_context, new_stdin):
     an argument, so that it can emulate the original type.
     """
     kwargs = {}
-    if name in ('ssh', 'local'):
+    if name in ('ssh', 'local', 'docker'):
         kwargs['original_transport'] = name
         name = 'mitogen'
     return connection_loader__get(name, play_context, new_stdin, **kwargs)

docs/ansible.rst

@@ -258,6 +258,15 @@ Sudo Variables
 * ansible.cfg: timeout
 
 
+Docker Variables
+----------------
+
+Note: Docker support is only intended for developer testing, it might disappear
+entirely prior to a stable release.
+
+* ansible_host
+
+
 Chat on IRC
 -----------
 

mitogen/docker.py

@@ -61,6 +61,4 @@ class Stream(mitogen.parent.Stream):
         elif self.image:
             bits += ['run', '-i', '--rm', self.image]
         bits += super(Stream, self).get_boot_command()
-        LOG.debug('Docker command line: %r', bits)
-        print bits
         return bits