Default -u (user) and "user:" in playbooks to the current user.

lib/ansible/constants.py

@@ -16,6 +16,7 @@
 # along with Ansible.  If not, see <http://www.gnu.org/licenses/>.
 
 import os
+import pwd
 
 DEFAULT_HOST_LIST      = os.environ.get('ANSIBLE_HOSTS', '/etc/ansible/hosts')
 DEFAULT_MODULE_PATH    = os.environ.get('ANSIBLE_LIBRARY', '/usr/share/ansible')
@@ -27,7 +28,11 @@ DEFAULT_FORKS          = os.environ.get('ANSIBLE_FORKS',5)
 DEFAULT_MODULE_ARGS    = os.environ.get('ANSIBLE_MODULE_ARGS','')
 DEFAULT_TIMEOUT        = os.environ.get('ANSIBLE_TIMEOUT',10)
 DEFAULT_POLL_INTERVAL  = os.environ.get('ANSIBLE_POLL_INTERVAL',15)
-DEFAULT_REMOTE_USER    = os.environ.get('ANSIBLE_REMOTE_USER','root')
+DEFAULT_REMOTE_USER    = os.environ.get('ANSIBLE_REMOTE_USER', None)
+
+if DEFAULT_REMOTE_USER is None:
+    DEFAULT_REMOTE_USER = pwd.getpwuid(os.geteuid())[0]
+
 DEFAULT_REMOTE_PASS    = None
 DEFAULT_PRIVATE_KEY_FILE    = os.environ.get('ANSIBLE_PRIVATE_KEY_FILE',None)
 DEFAULT_SUDO_PASS      = None

lib/ansible/runner/connection/ssh.py

@@ -37,6 +37,8 @@ class SSHConnection(object):
     def connect(self):
         ''' connect to the remote host '''
 
+        vvv("ESTABLISH CONNECTION FOR USER: %s" % self.runner.remote_user, host=self.host)
+
         self.common_args = []
         extra_args = os.getenv("ANSIBLE_SSH_ARGS", None)
         if extra_args is not None: