kdump configuration in NFSRoot setup

pankajd · 09-06-2014, 03:19 PM

Hi,

We have diskless clients with os cent os 6.2. We want ot configure kdump servoce , however, as there is no local storage available, and server not bookunt from localos, how we can proceede with kdup instattaiona and configuriation. Very few literaure is available for this.

TB0ne · 09-09-2014, 10:36 AM

Quote:

Originally Posted by pankajd

Hi,
We have diskless clients with os cent os 6.2. We want ot configure kdump servoce , however, as there is no local storage available, and server not bookunt from localos, how we can proceede with kdup instattaiona and configuriation. Very few literaure is available for this.

That's because there isn't anything special about it. Configure kdump to use whatever storage you have mapped to the local workstations.

pankajd · 09-11-2014, 09:14 PM

Thanks for the pointer. We decided to try first on the machine which has same configuration wbut is not diskless. We tried to crash that system, it shows that it has invoked the crash kernel, but while saving to the /var/crash, it says, fsck, unable to resolve UUID, unable to .

Following is the configuration of kdump.conf, (everything else is default) :
core_collector makedumpfile -c --message-level 1 -d 31

/etc/fstab has entry :
UUID=09009a89-438b-45c3-ae28-693dc84044bb / ext4 defaults 1 1
UUID=5fc2b735-955f-412a-847c-5797882b26e7 /boot ext4 defaults 1 2
tmpfs /dev/shm tmpfs defaults 0 0
devpts /dev/pts devpts gid=5,mode=620 0 0
sysfs /sys sysfs defaults 0 0
proc /proc proc defaults 0 0

Also, /boot/grub/grub.conf has entry :

default=1
timeout=5
splashimage=(hd0,0)/grub/splash.xpm.gz
hiddenmenu
title CentOS (2.6.32-220.el6.x86_64.debug)
root (hd0,0)
kernel /vmlinuz-2.6.32-220.el6.x86_64.debug ro root=UUID=09009a89-438b-45c3-ae28-693dc84044bb rd_MD_UUID=4d3bdbd2:fc6593af:578489a6:3095902f rd_NO_LUKS KEYBOARDTYPE=pc KEYTABLE=us LANG=en_US.UTF-8 quiet SYSFONT=latarcyrheb-sun16 rhgb crashkernel=512M rd_MD_UUID=cd964e00:2757eeed:1c36895e:4d3eb00f rd_NO_LVM rd_NO_DM
initrd /initramfs-2.6.32-220.el6.x86_64.debug.img
title CentOS (2.6.32-220.el6.x86_64)
root (hd0,0)
kernel /vmlinuz-2.6.32-220.el6.x86_64 ro root=UUID=09009a89-438b-45c3-ae28-693dc84044bb rd_MD_UUID=4d3bdbd2:fc6593af:578489a6:3095902f rd_NO_LUKS KEYBOARDTYPE=pc KEYTABLE=us LANG=en_US.UTF-8 quiet SYSFONT=latarcyrheb-sun16 rhgb crashkernel=512M rd_MD_UUID=cd964e00:2757eeed:1c36895e:4d3eb00f rd_NO_LVM rd_NO_DM
initrd /initramfs-2.6.32-220.el6.x86_64.img