T5152: Get default hostname for telegraf from FQDN or hostname

Fix for Telegraf agent hostname isn't qualified
Try to get hostname from FQDN and then from hostname
Used for metrics
You may have more than one machine with different domain names
r1 domain-name foo.local, hostname myhost
r2 domain-name bar.local, hostname myhost

It helps to detect from which exectly host we get metric for
InfluxDB2

1 files changed, 10 insertions, 1 deletions

diff --git a/src/conf_mode/service_monitoring_telegraf.py b/src/conf_mode/service_monitoring_telegraf.py
index 363408679..47510ce80 100755
--- a/src/conf_mode/service_monitoring_telegraf.py
+++ b/src/conf_mode/service_monitoring_telegraf.py
@@ -1,6 +1,6 @@
 #!/usr/bin/env python3
 #
-# Copyright (C) 2021-2022 VyOS maintainers and contributors
+# Copyright (C) 2021-2023 VyOS maintainers and contributors
 #
 # This program is free software; you can redistribute it and/or modify
 # it under the terms of the GNU General Public License version 2 or later as
@@ -15,6 +15,7 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 import os
+import socket
 import json
 
 from sys import exit
@@ -57,6 +58,13 @@ def get_nft_filter_chains():
 
     return chain_list
 
+def get_hostname() -> str:
+    try:
+        hostname = socket.getfqdn()
+    except socket.gaierror:
+        hostname = socket.gethostname()
+    return hostname
+
 def get_config(config=None):
     if config:
         conf = config
@@ -79,6 +87,7 @@ def get_config(config=None):
     monitoring = dict_merge(default_values, monitoring)
 
     monitoring['custom_scripts_dir'] = custom_scripts_dir
+    monitoring['hostname'] = get_hostname()
     monitoring['interfaces_ethernet'] = Section.interfaces('ethernet', vlan=False)
     monitoring['nft_chains'] = get_nft_filter_chains()