connection plugin to reuse the func/certmaster interface instead of ssh

This plugin permit to use func to run playbook and ansible command instead
of ssh. It can be used for a smooth transition from func/taboot to ansible by
letting people use ansible without having to change their network architecture.

lib/ansible/runner/connection_plugins/funcd.py

@@ -0,0 +1,92 @@
+# Based on local.py (c) 2012, Michael DeHaan <michael.dehaan@gmail.com>
+# Based on chroot.py (c) 2013, Maykel Moya <mmoya@speedyrails.com>
+# (c) 2013, Michael Scherer <misc@zarb.org>
+#
+# This file is part of Ansible
+#
+# Ansible is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# Ansible is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with Ansible.  If not, see <http://www.gnu.org/licenses/>.
+
+# ---
+# The func transport permit to use ansible over func. For people who have already setup
+# func and that wish to play with ansible, this permit to move gradually to ansible
+# without having to redo completely the setup of the network.
+
+HAVE_FUNC=False
+try:
+    import func.overlord.client as fc
+    HAVE_FUNC=True
+except ImportError:
+    pass
+
+import os
+from ansible.callbacks import vvv
+from ansible import errors
+import tempfile
+import shutil
+
+
+class Connection(object):
+    ''' Func-based connections '''
+
+    def __init__(self, runner, host, port, *args, **kwargs):
+        self.runner = runner
+        self.host = host
+        # port is unused, this go on func
+        self.port = port
+
+    def connect(self, port=None):
+        if not HAVE_FUNC:
+            raise errors.AnsibleError("func is not installed")
+
+        self.client = fc.Client(self.host)
+        return self
+
+    def exec_command(self, cmd, tmp_path, sudo_user, sudoable=False,
+                     executable='/bin/sh'):
+        ''' run a command on the remote minion '''
+
+        vvv("EXEC %s" % (cmd), host=self.host)
+        p = self.client.command.run(cmd)[self.host]
+        return (p[0], '', p[1], p[2])
+
+    def _normalize_path(self, path, prefix):
+        if not path.startswith(os.path.sep):
+            path = os.path.join(os.path.sep, path)
+        normpath = os.path.normpath(path)
+        return os.path.join(prefix, normpath[1:])
+
+    def put_file(self, in_path, out_path):
+        ''' transfer a file from local to remote '''
+
+        out_path = self._normalize_path(out_path, '/')
+        vvv("PUT %s TO %s" % (in_path, out_path), host=self.host)
+        self.client.local.copyfile.send(in_path, out_path)
+
+    def fetch_file(self, in_path, out_path):
+        ''' fetch a file from remote to local '''
+
+        in_path = self._normalize_path(in_path, '/')
+        vvv("FETCH %s TO %s" % (in_path, out_path), host=self.host)
+        # need to use a tmp dir due to difference of semantic for getfile
+        # ( who take a # directory as destination) and fetch_file, who
+        # take a file directly
+        tmpdir = tempfile.mkdtemp(prefix="func_ansible")
+        self.client.local.getfile.get(in_path, tmpdir)
+        shutil.move(os.path.join(tmpdir, self.host, os.path.basename(in_path)),
+                    out_path)
+        shutil.rmtree(tmpdir)
+
+    def close(self):
+        ''' terminate the connection; nothing to do here '''
+        pass