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Old 10-12-2018, 05:02 AM   #1
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Registered: Dec 2016
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kdump not generating vmcore log

i've a virtualbox Red Hat 7, I installed kdump and configured all necessary


#raw /dev/vg/lv_kdump
#ext4 /dev/vg/lv_kdump
#ext4 LABEL=/boot
#ext4 UUID=03138356-5e61-4ab3-b58e-27507ac41937
#sshkey /root/.ssh/kdump_id_rsa
path /var/crash
core_collector makedumpfile -l --message-level 1 -d 31
#core_collector scp
#kdump_post /var/crash/scripts/
#kdump_pre /var/crash/scripts/
#extra_bins /usr/bin/lftp
#extra_modules gfs2
#default shell
#force_rebuild 1
#force_no_rebuild 1
#dracut_args --omit-drivers "cfg80211 snd" --add-drivers "ext2 ext3"
#fence_kdump_args -p 7410 -f auto -c 0 -i 10
#fence_kdump_nodes node1 node2

GRUB_DISTRIBUTOR="$(sed 's, release .*$,,g' /etc/system-release)"
GRUB_CMDLINE_LINUX=" crashkernel=auto rhgb quiet"

# /etc/fstab
# Created by anaconda on Thu Oct 11 09:33:51 2018
# Accessible filesystems, by reference, are maintained under '/dev/disk'
# See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info
/dev/mapper/rhel-root   /                       xfs     defaults        0 0
UUID=8403e4b4-6495-4d18-9e5b-5fb26335a223 /boot                   xfs     defaults        0 0
/dev/mapper/rhel-swap   swap                    swap    defaults        0 0
kdump status:
 ● kdump.service - Crash recovery kernel arming
   Loaded: loaded (/usr/lib/systemd/system/kdump.service; enabled; vendor preset: enabled)
   Active: active (exited) since Fri 2018-10-12 11:32:19 IDT; 16min ago
  Process: 1070 ExecStart=/usr/bin/kdumpctl start (code=exited, status=0/SUCCESS)
 Main PID: 1070 (code=exited, status=0/SUCCESS)
   CGroup: /system.slice/kdump.service

Oct 11 21:39:46 localhost.localdomain systemd[1]: Starting Crash recovery ker...
Oct 12 11:32:19 localhost.localdomain kdumpctl[1070]: kexec: loaded kdump kernel
Oct 12 11:32:19 localhost.localdomain kdumpctl[1070]: Starting kdump: [OK]
Oct 12 11:32:19 localhost.localdomain systemd[1]: Started Crash recovery kern...
Hint: Some lines were ellipsized, use -l to show in full.
when I crash the kernel with :

echo 1 > /proc/sys/kernel/sysrq
echo c > /proc/sysrq-trigger
the virtualbox stuck no automatic reboot or any terminal output, after a few second im rebooting the virtualbox manually when i check the /var/crash no output inside

please advice
Old 10-12-2018, 11:08 PM   #2
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Registered: Feb 2013
Location: Tucson, AZ, USA
Distribution: CentOS 7.7.1908
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What does RedHat say? You do have a subscription, right?
Old 10-13-2018, 02:39 AM   #3
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Registered: Dec 2016
Posts: 19

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Originally Posted by scasey View Post
What does RedHat say? You do have a subscription, right?
No I donít .
Old 01-02-2019, 04:49 AM   #4
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Registered: Jan 2019
Posts: 1

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Did you find a solution?

Originally Posted by avihuh View Post
No I donít .
I have the same problem too and really wonder why..


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