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lepe
Asked: 2020-10-23 17:54:56 +0800 CST

Unable to run SNMPD as service (18.04)

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It seems that from Ubuntu 18.04 service will ignore the file /etc/default/snmpd file.

I need to run snmpd with the following options (as I have them in /etc/default/snmpd):

SNMPDOPTS='-Lsd -Lf /dev/null -I -smux,mteTrigger,mteTriggerConf -p /run/snmpd.pid udp:161,udp6:161'

However when I run it as service, this is what is executing:

# service snmpd status

● snmpd.service - Simple Network Management Protocol (SNMP) Daemon.
   Loaded: loaded (/lib/systemd/system/snmpd.service; enabled; vendor preset: enabled)
   Active: active (running) since Fri 2020-10-23 10:44:56 JST; 2s ago
  Process: 3089 ExecStartPre=/bin/mkdir -p /var/run/agentx (code=exited, status=0/SUCCESS)
 Main PID: 3091 (snmpd)
    Tasks: 1 (limit: 4915)
   CGroup: /system.slice/snmpd.service
           └─3091 /usr/sbin/snmpd -Lsd -Lf /dev/null -u Debian-snmp -g Debian-snmp -I -smux mteTrigger mteTriggerConf -f

10月 23 10:44:56 example.com systemd[1]: Starting Simple Network Management Protocol (SNMP) Daemon....
10月 23 10:44:56 example.com systemd[1]: Started Simple Network Management Protocol (SNMP) Daemon..
10月 23 10:44:58 example.com snmpd[3091]: NET-SNMP version 5.7.3

I have tried the solution posted here:

As root (or with sudo) run systemctl edit snmpd. In that new file, enter:

[Service]
ExecStart=
ExecStart=/usr/sbin/snmpd -Lsd -Lf /dev/null -I -smux,mteTrigger,mteTriggerConf -p /run/snmpd.pid udp:161,udp6:161

However when I do that, service snmpd status reports:

● snmpd.service - Simple Network Management Protocol (SNMP) Daemon.
   Loaded: loaded (/lib/systemd/system/snmpd.service; enabled; vendor preset: enabled)
  Drop-In: /etc/systemd/system/snmpd.service.d
           └─override.conf
   Active: inactive (dead) since Fri 2020-10-23 10:51:19 JST; 4s ago
  Process: 14039 ExecStart=/usr/sbin/snmpd -Lsd -Lf /dev/null -I -smux,mteTrigger,mteTriggerConf -p /run/snmpd.pid udp:161,udp6:161 (code=exited, status=0/SUCCESS)
  Process: 14038 ExecStartPre=/bin/mkdir -p /var/run/agentx (code=exited, status=0/SUCCESS)
 Main PID: 14039 (code=exited, status=0/SUCCESS)

10月 23 10:51:17 example.com systemd[1]: Starting Simple Network Management Protocol (SNMP) Daemon....
10月 23 10:51:17 example.com systemd[1]: Started Simple Network Management Protocol (SNMP) Daemon..
10月 23 10:51:19 example.com snmpd[14063]: NET-SNMP version 5.7.3
10月 23 10:51:19 example.com snmpd[14063]: Received TERM or STOP signal...  shutting down...

It seems to work for a few seconds before it exits without error.

If I stop the service and I start snmpd with those options manually it works fine.

What can I do to fix it?

services 18.04 snmp

1 Answers

  1. I solved adding -f at the end (which prevent the daemon from exiting):

    ExecStart=/usr/sbin/snmpd -Lsd -Lf /dev/null -I -smux,mteTrigger,mteTriggerConf -p /run/snmpd.pid udp:161,udp6:161 -f
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