I am attempting to create a service that will load device-specific
netfilter rules after the corresponding device has been created (bonds,
VLANs, etc.).
Here is my current attempt.
[Unit]
Description=Apply device-specific nftables rules for %I
Wants=sys-devices-virtual-net-%I.device nftables.service
After=sys-devices-virtual-net-%I.device
[Service]
Type=oneshot
ProtectSystem=full
ProtectHome=true
ExecStart=/sbin/nft -f /etc/sysconfig/nftables-%I.conf
RemainAfterExit=yes
[Install]
WantedBy=multi-user.target
But the service is still being started too early, despite its ordering
dependency on the device unit.
# systemctl status late-nftables@bond0.256.service
× late-nftables@bond0.256.service - Apply device-specific nftables
rules for bond0.256
Loaded: loaded (/etc/systemd/system/late-nftables@.service;
enabled; preset: disabled)
Active: failed (Result: exit-code) since Sun 2023-08-13 13:52:49
CDT; 29min ago
Process: 525 ExecStart=/sbin/nft -f
/etc/sysconfig/nftables-bond0.256.conf (code=exited, status=1/FAILURE)
Main PID: 525 (code=exited, status=1/FAILURE)
CPU: 45ms
Aug 13 13:52:49 firewall.penurio.us nft[525]: In file included from
/etc/sysconfig/nftables-bond0.256.conf:1:1-37:
Aug 13 13:52:49 firewall.penurio.us nft[525]:
/etc/nftables/fail2ban.nft:12:8-15: Error: Could not process rule: No
such file or directory
Aug 13 13:52:49 firewall.penurio.us nft[525]: chain FAIL2BAN {
Aug 13 13:52:49 firewall.penurio.us nft[525]: ^^^^^^^^
Aug 13 13:52:49 firewall.penurio.us systemd[1]:
late-nftables@bond0.256.service: Main process exited, code=exited,
status=1/FAILURE
Aug 13 13:52:49 firewall.penurio.us systemd[1]:
late-nftables@bond0.256.service: Failed with result 'exit-code'.
Aug 13 13:52:49 firewall.penurio.us systemd[1]: Failed to start Apply
device-specific nftables rules for bond0.256.
# systemctl status late-nftables@bond0.256.service
● sys-devices-virtual-net-bond0.256.device -
/sys/devices/virtual/net/bond0.256
Loaded: loaded
Active: active (plugged) since Sun 2023-08-13 13:52:51 CDT; 31min ago
Until: Sun 2023-08-13 13:52:51 CDT; 31min ago
Device: /sys/devices/virtual/net/bond0.256
The device unit has been "active (plugged) since Sun 2023-08-13 13:52:51
CDT", but the service failed at 13:52:49, 2 seconds earlier.
What am I missing?
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