When I start Net-SNMP from systemd, there is no error message but the daemon does not run:
% sudo systemctl start snmpd %
When I start it from the command line, it runs:
% sudo /usr/sbin/snmpd
and answers to SNMP queries.
If I add the debug flags (-LSdd), I see that the daemon launched by systemd is killed immediately after:
Apr 7 15:37:50 localhost snmpd: NET-SNMP version 5.7.2 Apr 7 15:37:50 localhost snmpd: Received TERM or STOP signal... shutting down...
The service file is the default one of the Arch Linux package:
[Unit] Description=Simple Network Management Protocol (SNMP) Daemon After=syslog.target network.target [Service] Type=forking ExecStart=/usr/sbin/snmpd ExecReload=/bin/kill -HUP $MAINPID [Install] WantedBy=multi-user.target
If I add RemainAfterExit=yes in the service file, snmpd works but the machine no longer starts properly (no DHCP client, for instance)
The system is an up-to-date Arch Linux, the version of the package is:
Name : net-snmp Version : 5.7.2-3
There is an old Arch Linux bug report apparently for this very bug: https://bugs.archlinux.org/task/32258?string=snmp&project=1&type%5B0%5D=&sev%5B0%5D=&pri%5B0%5D=&due%5B0%5D=&reported%5B0%5D=&cat%5B0%5D=&status%5B0%5D=open&percent%5B0%5D=&opened=&dev=&closed=&duedatefrom=&duedateto=&changedfrom=&changedto=&openedfrom=&openedto=&closedfrom=&closedto=