Voir :

• Kdump
• http://fr.slideshare.net/BulandSingh/referenceguidekernelcrashdumpanalysis

/etc/default/grub

#GRUB_CMDLINE_LINUX="crashkernel=auto rd.lvm.lv=centos/root rd.lvm.lv=centos/swap rhgb quiet"
GRUB_CMDLINE_LINUX="crashkernel=auto rd.lvm.lv=centos/root rd.lvm.lv=centos/swap rhgb crashkernel=128M"

cp -p /boot/grub2/grub.cfg /boot/grub2/grub.cfg.bak
grub2-mkconfig > /boot/grub2/grub.cfg

/etc/kdump.conf

default reboot

reboot

systemctl status kdump

Serveur

fence_kdump -o off --nodename=node1

Client

/usr/libexec/fence_kdump_send -i 5 -c 1 node1

Crash

echo 1 > /proc/sys/kernel/sysrq
echo c > /proc/sysrq-trigger

ls -lrt /var/crash/