There are arm specific tweaks in virQEMUCapsSupportsChardev that can
lead to "false" in that case it has to fallback to the older code which
does not support log= attributes (and thereby the logfile argument).
Those cases are:
if ((def->os.arch != VIR_ARCH_ARMV7L) && (def->os.arch != VIR_ARCH_AARCH64))
return true;
Ok, we are VIR_ARCH_AARCH64 so this does not trigger - which it would for all
non-arms.
So this is already arm special for sure, the next check is:
/* This may not be true for all ARM machine types, but at least
* the only supported non-virtio serial devices of vexpress and versatile
* don't have the -chardev property wired up. */
return (chr->info.type == VIR_DOMAIN_DEVICE_ADDRESS_TYPE_VIRTIO_MMIO ||
(chr->deviceType == VIR_DOMAIN_CHR_DEVICE_TYPE_CONSOLE &&
chr->targetType == VIR_DOMAIN_CHR_CONSOLE_TARGET_TYPE_VIRTIO));
The chr is the serial object.
So it has either to be of type virtio or virtio-console - all others would fall
back and cause the issue.
I checked this was that way since back to at least Xenial (or more).
So this is really not a bug/regression - it is a constraint of the arm platform
that their serials can not represent the logfile and therefore the check
returning false and due to that rejecting your logfile argument.
@admcleod - in regard to the initial bug this really is unrelated.
@admcleod - might this be an artifact of your "enabling debugging
everywhere" or does nova set log= everywhere&all-the-time. Do you have
an old case that worked with this or do we have to consider this just as
an open issue that never was solved before?
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https://bugs.launchpad.net/bugs/1697610
Title:
logfile not supported in this QEMU binary
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