{{>toc}}

h1. Netconsole

h2. nagios

<pre>

root@nucnagios:~/netconsole# more setup-console.sh 

#!/bin/bash

here=$(dirname $(readlink -f $0))

cleanup(){

	kill $(jobs -p)

	exit 0

}

trap cleanup EXIT

nc -u -l -p 6600 > $here/stri.dmesg 2>&1 &

nc -u -l -p 6601 > $here/g1.dmesg 2>&1 &

nc -u -l -p 6602 > $here/g2.dmesg 2>&1 &

nc -u -l -p 6603 > $here/g3.dmesg 2>&1 &

nc -u -l -p 6604 > $here/g4.dmesg 2>&1 &

nc -u -l -p 6605 > $here/g5.dmesg 2>&1 &

nc -u -l -p 6606 > $here/g6.dmesg 2>&1 &

nc -u -l -p 6607 > $here/n7.dmesg 2>&1 &

nc -u -l -p 6608 > $here/g8.dmesg 2>&1 &

nc -u -l -p 6609 > $here/g9.dmesg 2>&1 &

nc -u -l -p 6610 > $here/g10.dmesg 2>&1 &

nc -u -l -p 6611 > $here/g11.dmesg 2>&1 &

nc -u -l -p 6612 > $here/g12.dmesg 2>&1 &

nc -u -l -p 6613 > $here/g13.dmesg 2>&1 &

nc -u -l -p 6614 > $here/g14.dmesg 2>&1 &

nc -u -l -p 6615 > $here/g15.dmesg 2>&1 &

nc -u -l -p 6616 > $here/g16.dmesg 2>&1 &

echo "netconsole listener running"

wait

root@nucnagios:~/netconsole# nohup ./setup-console.sh >& /dev/null < /dev/null &

</pre>

h2. g1

<pre>

root@g1:~# more /etc/rc.local

declare -A netconsole_cfg

netconsole_cfg["g1"]="192.168.128.201:6601"

# Setup some helper vars

h=$(hostname -s)

netconsole_path=/sys/kernel/config/netconsole/nagios

netconsole_ip=$(echo ${netconsole_cfg[$h]} | awk -F: '{print $1}')

netconsole_port=$(echo ${netconsole_cfg[$h]} | awk -F: '{print $2}')

netconsole_int=$(echo ${netconsole_cfg[$h]} | awk -F: '{print $3}')

netconsole_int=${netconsole_int:-eth2}

# NETCONSOLE interface

[ "${netconsole_cfg[$h]}" ] && ip a a $netconsole_ip/24 dev $netconsole_int

# Setup netconsole

modprobe configfs

modprobe netconsole

mount | grep -q configfs || mount none -t configfs /sys/kernel/config

mkdir -p $netconsole_path

if [ "${netconsole_cfg[$h]}" ]; then

	echo 0 > $netconsole_path/enabled

	echo $netconsole_int > $netconsole_path/dev_name

	echo $netconsole_ip > $netconsole_path/local_ip

	echo $netconsole_port > $netconsole_path/local_port

	echo "192.168.128.248" > $netconsole_path/remote_ip

	echo "b8:ae:ed:70:8b:80" > $netconsole_path/remote_mac

	echo 1 > $netconsole_path/enabled

	sleep 1

	echo m > /proc/sysrq-trigger  # test-it

fi

</pre>

h2. gcc67

<pre>

modprobe configfs

modprobe netconsole

#mount none -t configfs /sys/kernel/config

netconsole_path=/sys/kernel/config/netconsole/nagios

mkdir -p $netconsole_path

echo 0 > $netconsole_path/enabled

echo enp10s0 > $netconsole_path/dev_name

echo 91.224.148.12 > $netconsole_path/local_ip

echo 6615  > $netconsole_path/local_port

echo 6615  > $netconsole_path/remote_port

echo "89.234.156.171" > $netconsole_path/remote_ip

echo "b8:ae:ed:70:8b:80" > $netconsole_path/remote_mac

echo 1 > $netconsole_path/enabled

sleep 1

echo m > /proc/sysrq-trigger  # test-it

</pre>

h2. gcc68

<pre>

modprobe configfs

modprobe netconsole

mount none -t configfs /sys/kernel/config

netconsole_path=/sys/kernel/config/netconsole/nagios

mkdir -p $netconsole_path

echo 0 > $netconsole_path/enabled

echo enp10s0 > $netconsole_path/dev_name

echo 91.224.148.13 > $netconsole_path/local_ip

echo 6616  > $netconsole_path/local_port

echo 6616  > $netconsole_path/remote_port

echo "89.234.156.171" > $netconsole_path/remote_ip

echo "b8:ae:ed:70:8b:80" > $netconsole_path/remote_mac

echo 1 > $netconsole_path/enabled

sleep 1

echo m > /proc/sysrq-trigger  # test-it

</pre>

h2. New

<pre>

echo 0 > /sys/kernel/config/netconsole/nagios/enabled 

rmdir /sys/kernel/config/netconsole/nagios/

rmmod netconsole

#h8

modprobe netconsole netconsole=+@192.168.128.53/eth0,6666@192.168.128.248/b8:ae:ed:70:8b:80

#gcc67

modprobe netconsole netconsole=+@91.224.148.12/enp10s0,6666@89.234.156.171/b8:ae:ed:70:8b:80

#gcc68

modprobe netconsole netconsole=+@91.224.148.13/enp10s0,6666@89.234.156.171/b8:ae:ed:70:8b:80

#gcc68 ipv6 link local

modprobe netconsole netconsole=+@fe80::7285:c2ff:fe3a:167e/enp10s0,6666@fe80::baae:edff:fe70:8b80/b8:ae:ed:70:8b:80

</pre>

On nagios:

<pre>

# if not managed by supervisord see root@nucnagios:/etc/supervisor/conf.d/*

root@nucnagios:~/netconsole# nohup python3 pyudplogger.py >& log.txt < /dev/null &

root@nucnagios:~/netconsole# nohup python3 pyudplogger6.py >& log6.txt < /dev/null &

</pre>

TODO early boot le meme format dans grub https://www.kernel.org/doc/Documentation/networking/netconsole.txt