adds connection established message to ansible-connection (#22492)

This will now print a log message that displays how long the ssh
connection took to establish to the remote device.  If the connection
established time is exceed it will also print a message to the log file
that the connection attempts have exceed.

Updates default connection retries to 30

fixes #22319

bin/ansible-connection

@@ -126,6 +126,9 @@ class Server():
         if not self.conn.connected:
             raise AnsibleConnectionFailure('unable to connect to remote host')
 
+        connection_time = datetime.datetime.now() - self._start_time
+        display.vvvv('connection established in %s' % connection_time, play_context.remote_addr)
+
         self.socket = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
         self.socket.bind(path)
         self.socket.listen(1)
@@ -321,6 +324,8 @@ def main():
                 time.sleep(C.PERSISTENT_CONNECT_INTERVAL)
                 attempts += 1
                 if attempts > C.PERSISTENT_CONNECT_RETRIES:
+                    display.vvvv('number of connection attempts exceeded, unable to connect to control socket')
+                    display.vvvv('persistent_connect_interval=%s, persistent_connect_retries=%s' % (C.PERSISTENT_CONNECT_INTERVAL, C.PERSISTENT_CONNECT_RETRIES))
                     sys.stderr.write('failed to connect to control socket')
                     sys.exit(255)
 

lib/ansible/constants.py

@@ -347,7 +347,7 @@ PARAMIKO_HOST_KEY_AUTO_ADD     = get_config(p, 'paramiko_connection', 'host_key_
 PARAMIKO_PROXY_COMMAND         = get_config(p, 'paramiko_connection', 'proxy_command', 'ANSIBLE_PARAMIKO_PROXY_COMMAND', None)
 PARAMIKO_LOOK_FOR_KEYS         = get_config(p, 'paramiko_connection', 'look_for_keys', 'ANSIBLE_PARAMIKO_LOOK_FOR_KEYS', True, value_type='boolean')
 PERSISTENT_CONNECT_TIMEOUT     = get_config(p, 'persistent_connection', 'connect_timeout', 'ANSIBLE_PERSISTENT_CONNECT_TIMEOUT', 30, value_type='integer')
-PERSISTENT_CONNECT_RETRIES     = get_config(p, 'persistent_connection', 'connect_retries', 'ANSIBLE_PERSISTENT_CONNECT_RETRIES', 10, value_type='integer')
+PERSISTENT_CONNECT_RETRIES     = get_config(p, 'persistent_connection', 'connect_retries', 'ANSIBLE_PERSISTENT_CONNECT_RETRIES', 30, value_type='integer')
 PERSISTENT_CONNECT_INTERVAL    = get_config(p, 'persistent_connection', 'connect_interval', 'ANSIBLE_PERSISTENT_CONNECT_INTERVAL', 1, value_type='integer')
 
 # obsolete -- will be formally removed