Comment #9 on issue 994 by darius.s...@rkt-online.com: Support Setting the
UUID of a ganeti instance explicitly add instance creation time
https://code.google.com/p/ganeti/issues/detail?id=994
Hello,
I use ganeti since 2.11 and have also discovered this "uuid" problem with
the xen-hvm hypervisor.
I work for a translation agency where we use a software called "across".
Since release 6.0 the developers implemented a licensing tool
called "codemeter". This tool checks the system UUID and refuses the
services to start if the UUID changes.
In issue 1102 I have introduced a simple patch (like currently for KVM)
which simply adds the instance UUID as system UUID to the guest. This patch
is still not adopted.
In issue 1105 I have also added configurable usbdevices and keymap support
for xen-hvm. This patch also did not get adopted.
Now lets try this one...
The first patch "constants-add-uuid.patch" adds the uuid constant to kvm
and xen-hvm.
For xen-hvm it also adds configurable usbdevices, keymap and vga.
Configurable usbdevices is also very important to me as we have another
software called "datev" which uses an usb-dongle for licensing.
The second patch "kvm-add-uuid.patch" changes kvm_cmd.extend to
prefer "hvp[constants.HV_UUID]" over "instance.uuid" when available.
The third patch "xen-hvm-add-keymap+uuid+vga+usbdevice.patch" changes
config.write to also prefer "hvp[constants.HV_UUID]" over "instance.uuid".
It also adds hvp support for usbdevices, keymap and vga.
The fourth patch "write-uuid-to-export-config.patch" adds "uuid" to
config.ini when instance gets exported through gnt-backup.
The fourth patch makes it possible to import an exported instance
and "keep" its original uuid.
Of cource this can be changed after import with "gnt-instance modify -H
uuid='' INSTANCE" to use the new instance uuid created during import.
"gnt-backup import" is cool and useful for instance moves to other clusters
or other storages but not really useful for "restore".
Currently I'm working on some patches that allow a "real" restore of an
instance with gnt-backup.
For example...
gnt-backup restore INSTANCE (takes no other args)
To make this work these four patches are essential.
All four patches apply cleanly to ganeti stable-2.15 git branch but should
also work with older versions.
Please consider these patches for upstream.
They do not change the behavior of already deployed clusters but improve
xen-hvm and import.
Kind regards
Darius
Attachments:
constants-add-uuid.patch 1.6 KB
kvm-add-uuid.patch 834 bytes
xen-hvm-add-keymap+uuid+vga+usbdevice.patch 1.4 KB
write-uuid-to-export-config.patch 859 bytes
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