Continue work from PR #749 on configure private

docs/support/index.rst

@@ -116,6 +116,7 @@ ____________________________________
 * :code:`auto_rollback_on_error` (ios) - Disable automatic rollback (certain versions of IOS support configure replace, but not rollback on error) (default: ``True``).
 * :code:`config_lock` (iosxr, junos) - Lock the config during open() (default: ``False``).
 * :code:`lock_disable` (junos) - Disable all configuration locking for management by an external system (default: ``False``).
+* :code:`config_private` (junos) - Configure private, no DB locking (default: ``False``).
 * :code:`canonical_int` (ios) - Convert operational interface's returned name to canonical name (fully expanded name) (default: ``False``).
 * :code:`dest_file_system` (ios) - Destination file system for SCP transfers (default: ``flash:``).
 * :code:`enable_password` (eos) - Password required to enter privileged exec (enable) (default: ``''``).

napalm/junos/junos.py

@@ -66,6 +66,7 @@ def __init__(self, hostname, username, password, timeout=60, optional_args=None)
             * config_lock (True/False): lock configuration DB after the connection is established.
             * lock_disable (True/False): force configuration lock to be disabled (for external lock
                 management).
+            * config_private (True/False): juniper configure private command, no DB locking
             * port (int): custom port
             * key_file (string): SSH key file path
             * keepalive (int): Keepalive interval
@@ -92,6 +93,7 @@ def __init__(self, hostname, username, password, timeout=60, optional_args=None)
         # Define locking method
         self.lock_disable = optional_args.get("lock_disable", False)
         self.session_config_lock = optional_args.get("config_lock", False)
+        self.config_private = optional_args.get("config_private", False)
 
         # Junos driver specific options
         self.junos_config_database = optional_args.get(
@@ -223,7 +225,11 @@ def _load_candidate(self, filename, config, overwrite):
             with open(filename) as f:
                 configuration = f.read()
 
-        if not self.lock_disable and not self.session_config_lock:
+        if (
+            not self.lock_disable
+            and not self.session_config_lock
+            and not self.config_private
+        ):
             # if not locked during connection time, will try to lock
             self._lock()
 
@@ -233,6 +239,13 @@ def _load_candidate(self, filename, config, overwrite):
             if fmt == "xml":
                 configuration = etree.XML(configuration)
 
+            if self.config_private:
+                try:
+                    self.device.rpc.open_configuration(private=True, normalize=True)
+                except RpcError as err:
+                    if str(err) == "uncommitted changes will be discarded on exit":
+                        pass
+
             self.device.cu.load(
                 configuration,
                 format=fmt,