[show] Add command 'show runningconfiguration syslog' (sonic-net#617)

Author: tsvanduyn

doc/Command-Reference.md

@@ -2959,6 +2959,7 @@ This sub-section explains the show commands for displaying the running configura
 5) all
 6) acl
 7) ports
+8) syslog
 
 **show runningconfiguration all**
 
@@ -3012,6 +3013,24 @@ This command displays the running configuration of the ntp module.
   admin@sonic:~$ show runningconfiguration ntp
   ```
 
+**show runningconfiguration syslog**
+
+This command displays the running configuration of the syslog module. 
+
+  - Usage:
+    show runningconfiguration syslog
+
+
+- Example:
+  ```
+  admin@str-s6000-acs-11:~$ show run syslog 
+  Syslog Servers
+  ----------------
+  4.4.4.4
+  5.5.5.5
+  ```
+
+
 **show runningconfiguration snmp**
 
 This command displays the running configuration of the snmp module.

show/main.py

@@ -1480,6 +1480,24 @@ def ntp(verbose):
     run_command(cmd, display_cmd=verbose)
 
 
+# 'syslog' subcommand ("show runningconfiguration syslog")
+@runningconfiguration.command()
+@click.option('--verbose', is_flag=True, help="Enable verbose output")
+def syslog(verbose):
+    """Show Syslog running configuration"""
+    syslog_servers = []
+    syslog_dict = {}
+    with open("/etc/rsyslog.conf") as syslog_file:
+        data = syslog_file.readlines()
+    for line in data:
+        if line.startswith("*.* @"):
+            line = line.split(":")
+            server = line[0][5:]
+            syslog_servers.append(server)
+    syslog_dict['Syslog Servers'] = syslog_servers
+    print tabulate(syslog_dict, headers=syslog_dict.keys(), tablefmt="simple", stralign='left', missingval="")
+
+
 #
 # 'startupconfiguration' group ("show startupconfiguration ...")
 #