Background:

We integrated zabbix-agent2 to support VRF to the VyOS (based on Debian bookworm)

So, the same is true for Debian.

And had issues if systemd unit was started from the user `zabbix` under VRF

```
Jul 31 16:47:30 r4 systemd[1]: zabbix-agent2.service: Scheduled restart job, restart counter is at 282.
Jul 31 16:47:30 r4 systemd[1]: Stopped zabbix-agent2.service - Zabbix Agent 2.
Jul 31 16:47:30 r4 systemd[1]: Started zabbix-agent2.service - Zabbix Agent 2.
Jul 31 16:47:30 r4 ip[9020]: mkdir failed for /sys/fs/cgroup/system.slice/zabbix-agent2.service/vrf: Permission denied
Jul 31 16:47:30 r4 ip[9020]: Failed to setup vrf cgroup2 directory
Jul 31 16:47:30 r4 systemd[1]: zabbix-agent2.service: Main process exited, code=exited, status=255/EXCEPTION
Jul 31 16:47:30 r4 systemd[1]: zabbix-agent2.service: Failed with result 'exit-code'.
 ```

Additional capabilities do not work https://vyos.dev/T5657#196808

```
+CapabilityBoundingSet=CAP_NET_ADMIN CAP_SYS_ADMIN CAP_SYS_RESOURCE CAP_BPF CAP_DAC_OVERRIDE CAP_FOWNER+AmbientCapabilities=CAP_NET_ADMIN CAP_SYS_ADMIN CAP_SYS_RESOURCE CAP_BPF CAP_DAC_OVERRIDE CAP_FOWNER
 ```

We have to use user "root" to the systemd unit to start the service correctly under VRF

User=root

```

set vrf name mgmt table '123'
set interfaces dummy dum123 vrf 'mgmt'

set vrf bind-to-all
set service monitoring zabbix-agent host-name 'r4'
set service monitoring zabbix-agent server '192.0.2.5'
set service monitoring zabbix-agent vrf 'mgmt'

```

Status

```

vyos@r4# sudo systemctl status zabbix-agent2
● zabbix-agent2.service - Zabbix Agent 2
     Loaded: loaded (/lib/systemd/system/zabbix-agent2.service; disabled; preset: enabled)
    Drop-In: /run/systemd/system/zabbix-agent2.service.d
             └─10-override.conf
     Active: active (running) since Thu 2024-08-01 12:37:55 EEST; 1min 49s ago
       Docs: man:zabbix_agent2
   Main PID: 6230 (zabbix_agent2)
      Tasks: 9 (limit: 18718)
     Memory: 26.5M
        CPU: 392ms
     CGroup: /system.slice/zabbix-agent2.service
             └─vrf
               └─mgmt
                 └─6230 /usr/sbin/zabbix_agent2 --config /run/zabbix/zabbix-agent2.conf --foreground

Aug 01 12:37:55 r4 systemd[1]: Started zabbix-agent2.service - Zabbix Agent 2.
Aug 01 12:37:55 r4 ip[6230]: Starting Zabbix Agent 2 (6.0.14)
Aug 01 12:37:55 r4 ip[6230]: Zabbix Agent2 hostname: [r4]
Aug 01 12:37:55 r4 ip[6230]: Press Ctrl+C to exit.
[edit]
vyos@r4# 

```

Dropping privileges will be an excellent option, as starting the unit under the root is insecure.