Added connect command

Signed-off-by: Victor Moene <victor.moene@northern.tech>
Ticket: ENT-5726

cf_remote/commands.py

@@ -1,5 +1,6 @@
 from datetime import datetime
 import os
+import subprocess
 import sys
 import time
 from multiprocessing.dummy import Pool
@@ -931,3 +932,16 @@ def agent(hosts, bootstrap=None):
             print(output)
 
     return 0
+
+
+def connect_cmd(hosts):
+
+    assert hosts and len(hosts)
+
+    if len(hosts) > 1:
+        user_error("You can only connect to one host at a time")
+
+    print("Opening a SSH command shell...")
+    subprocess.run(["ssh", hosts[0]])
+
+    return 0

cf_remote/main.py

@@ -274,6 +274,11 @@ def _get_arg_parser():
     )
     sp.add_argument("--bootstrap", "-B", help="Which hub to bootstrap to", type=str)
 
+    sp = subp.add_parser("connect", help="Opens interactive ssh shell")
+    sp.add_argument(
+        "--hosts", "-H", help="Host to open the shell on", type=str, required=True
+    )
+
     return ap
 
 
@@ -388,6 +393,8 @@ def run_command_with_args(command, args):
         return commands.deploy(args.hub, args.masterfiles)
     elif command == "agent":
         return commands.agent(args.hosts, args.bootstrap)
+    elif command == "connect":
+        return commands.connect_cmd(args.hosts)
     else:
         user_error("Unknown command: '{}'".format(command))