Ack to the report.
While I had some systems (lpar) which worked I was trivially able to confirm
that it doesn't work on KVM guests based on cloud images.
I see this on install of kdump-tools (default answers to debconf)
Setting up kdump-tools (1:1.6.4-2) ...
Using config file '/etc/zipl.conf'
Building bootmap in '/boot'
Adding IPL section 'ubuntu' (default)
Preparing boot device: vda (0000).
Done.
Creating config file /etc/default/kdump-tools with new version
But that leaves /etc/zipl.conf unmodified.
Frank already copied the snippet in the report.
This line isn't working:
$ sed -i "/parameters/{s|\"$| crashkernel=${DEF_PRESET}\"|}"
/etc/zipl.conf
At least in my guest and my LPARs the following seemed better, so for
your consideration:
$ sed -i "s/^parameters\s*=/& crashkernel=${DEF_PRESET} /"
/etc/zipl.conf
Note: at this point it already checked there is no crashkernel statement
yet, so we can unconditionally insert it here.
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https://bugs.launchpad.net/bugs/1790788
Title:
Customize 'crashkernel' parameter is not properly working
Status in makedumpfile package in Ubuntu:
New
Bug description:
Trying to use crashdump especially in a KVM machine.
Installation looks fine and the reboot is triggered.
But it does not work because the kernel does not have a 'crashkernel='
parameter.
Nothing in /proc/cmdline:
$ cat /proc/cmdline
root=LABEL=cloudimg-rootfs
Issue seems to be in adding the crashkernel line in this snippet:
# Customize crashkernel= value according to architecture
ARCH="$(arch)"
DEF_PRESET="384M-:128M"
case "$ARCH" in
s390x)
HAS_CRASHKERNEL="$(grep crashkernel /etc/zipl.conf)" || true
if test -z "$HAS_CRASHKERNEL"; then
sed -i "/parameters/{s|\"$| crashkernel=${DEF_PRESET}\"|}"
/etc/zipl.conf
zipl
fi
CIO_IGNORE="$(cio_ignore -u -k)"
sed -i "s/\#KDUMP_CMDLINE_APPEND/KDUMP_CMDLINE_APPEND/" $INITCONFFILE
sed -i "/KDUMP_CMDLINE_APPEND/{s|\"$| ${CIO_IGNORE}\"|}"
$INITCONFFILE
;;
esac
(especially 1st sed stmt)
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