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Diffstat (limited to 'live-image-kdump-howto.txt')
| -rw-r--r-- | live-image-kdump-howto.txt | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/live-image-kdump-howto.txt b/live-image-kdump-howto.txt new file mode 100644 index 0000000..1695a1c --- /dev/null +++ b/live-image-kdump-howto.txt @@ -0,0 +1,25 @@ +Kdump now works on live images with some manual configurations. Here is the step +by step guide. + +1. Enable crashkernel reservation + +Since there isn't any config file that can be used to configure kernel +parameters for live images before booting them, we have to append 'crashkernel' +argument in boot menu every time we boot a live image. + +2. Change dump target in /etc/kdump.conf + +When kdump kernel boots in a live environment, the default target /var/crash is +in RAM so you need to change the dump target to an external disk or a network +dump target. + +Besides, make sure that "default dump_to_rootfs" is not specified. + +3. Start kdump service + + $ kdumpctl start + +4. Trigger a kdump test + + $ echo 1 > /proc/sys/kernel/sysrq + $ echo c > /proc/sysrq-trigger |