more debug logs for free, network_cli, paramiko and add hostname context to debugging messages (#39205)

* Add hostname context to debugging messages
* Set paramiko's channel

lib/ansible/plugins/connection/network_cli.py

@@ -157,6 +157,7 @@ options:
       - name: ANSIBLE_PERSISTENT_COMMAND_TIMEOUT
 """
 
+import getpass
 import json
 import logging
 import re
@@ -221,6 +222,11 @@ class Connection(ConnectionBase):
                 raise AttributeError("'%s' object has no attribute '%s'" % (self.__class__.__name__, name))
             return getattr(self._cliconf, name)
 
+    def _get_log_channel(self):
+        name = "p=%s u=%s | " % (os.getpid(), getpass.getuser())
+        name += "paramiko [%s]" % self._play_context.remote_addr
+        return name
+
     def get_prompt(self):
         """Returns the current prompt from the device"""
         return self._matched_prompt
@@ -284,6 +290,7 @@ class Connection(ConnectionBase):
             return
 
         self.paramiko_conn = connection_loader.get('paramiko', self._play_context, '/dev/null')
+        self.paramiko_conn._set_log_channel(self._get_log_channel())
         self.paramiko_conn.set_options(direct={'look_for_keys': not bool(self._play_context.password and not self._play_context.private_key_file)})
         self.paramiko_conn.force_persistence = self.force_persistence
         ssh = self.paramiko_conn._connect()
@@ -363,7 +370,7 @@ class Connection(ConnectionBase):
         '''
         # only close the connection if its connected.
         if self._connected:
-            display.debug("closing ssh connection to device")
+            display.debug("closing ssh connection to device", host=self._play_context.remote_addr)
             if self._ssh_shell:
                 display.debug("firing event: on_close_shell()")
                 self._terminal.on_close_shell()