[config]: config reload needs to restart services (sonic-net#146)

config/main.py

@@ -93,6 +93,18 @@ def _abort_if_false(ctx, param, value):
     if not value:
         ctx.abort()
 
+def _restart_services():
+    run_command("service interfaces-config restart", display_cmd=True)
+    run_command("service ntp-config restart", display_cmd=True)
+    run_command("service rsyslog-config restart", display_cmd=True)
+    run_command("service swss restart", display_cmd=True)
+    run_command("service bgp restart", display_cmd=True)
+    run_command("service teamd restart", display_cmd=True)
+    run_command("service pmon restart", display_cmd=True)
+    run_command("service lldp restart", display_cmd=True)
+    run_command("service snmp restart", display_cmd=True)
+    run_command("service dhcp_relay restart", display_cmd=True)
+
 # This is our main entrypoint - the main 'config' command
 @click.group()
 def cli():
@@ -131,6 +143,12 @@ def reload(filename):
     command = "{} -j {} --write-to-db".format(SONIC_CFGGEN_PATH, filename)
     run_command(command, display_cmd=True)
     client.set(config_db.INIT_INDICATOR, True)
+    command = "{} -j {} -v \"DEVICE_METADATA['localhost']['hostname']\"".format(SONIC_CFGGEN_PATH, filename)
+    p = subprocess.Popen(command, shell=True, stdout=subprocess.PIPE)
+    p.wait()
+    hostname = p.communicate()[0].strip()
+    _change_hostname(hostname)
+    _restart_services()
 
 @cli.command()
 @click.option('-y', '--yes', is_flag=True, callback=_abort_if_false,
@@ -177,16 +195,7 @@ def load_minigraph():
     hostname = p.communicate()[0].strip()
     _change_hostname(hostname)
     #FIXME: After config DB daemon is implemented, we'll no longer need to restart every service.
-    run_command("service interfaces-config restart", display_cmd=True)
-    run_command("service ntp-config restart", display_cmd=True)
-    run_command("service rsyslog-config restart", display_cmd=True)
-    run_command("service swss restart", display_cmd=True)
-    run_command("service bgp restart", display_cmd=True)
-    run_command("service teamd restart", display_cmd=True)
-    run_command("service pmon restart", display_cmd=True)
-    run_command("service lldp restart", display_cmd=True)
-    run_command("service snmp restart", display_cmd=True)
-    run_command("service dhcp_relay restart", display_cmd=True)
+    _restart_services()
     print "Please note setting loaded from minigraph will be lost after system reboot. To preserve setting, run `config save`."
 #
 # 'bgp' group