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Fix netconsole: configure via configfs after network up.

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The modprobe.conf approach failed because the network interface
doesn't exist when the module loads at boot. Now using a systemd
service to configure netconsole via configfs after network-online.

Also raise console_loglevel to 8 so all kernel messages (not just
KERN_WARNING and above) are sent to netconsole.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>
This commit is contained in:
Petru
2025-12-12 12:08:12 +00:00
parent 3970c60016
commit 4efc44e964
1 changed files with 20 additions and 3 deletions
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23
hosts/beefy/default.nix
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@@ -24,10 +24,27 @@
boot.kernelParams = [ "consoleblank=300" "nmi_watchdog=1" ];
# Netconsole - stream kernel messages to zippy (192.168.1.2)
# Must configure via configfs after network is up (interface doesn't exist at module load)
boot.kernelModules = [ "netconsole" ];
boot.extraModprobeConfig = ''
options netconsole netconsole=@/enp1s0,6666@192.168.1.2/c0:3f:d5:62:55:bb
'';
boot.kernel.sysctl."kernel.printk" = "8 4 1 7"; # Raise console_loglevel to send all messages
systemd.services.netconsole-sender = {
description = "Configure netconsole to send kernel messages to zippy";
wantedBy = [ "multi-user.target" ];
after = [ "network-online.target" ];
wants = [ "network-online.target" ];
serviceConfig = {
Type = "oneshot";
RemainAfterExit = true;
};
script = ''
mkdir -p /sys/kernel/config/netconsole/target1
echo enp1s0 > /sys/kernel/config/netconsole/target1/dev_name
echo 192.168.1.2 > /sys/kernel/config/netconsole/target1/remote_ip
echo 6666 > /sys/kernel/config/netconsole/target1/remote_port
echo c0:3f:d5:62:55:bb > /sys/kernel/config/netconsole/target1/remote_mac
echo 1 > /sys/kernel/config/netconsole/target1/enabled
'';
};
# Kdump for kernel crash analysis
boot.crashDump = {