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* [pve-devel] [PATCH v4 serries 0/4] disk reassign: add new feature
@ 2020-10-02  8:23 Aaron Lauterer
  2020-10-02  8:23 ` [pve-devel] [PATCH v4 qemu-server 1/4] disk reassign: add API endpoint Aaron Lauterer
                   ` (4 more replies)
  0 siblings, 5 replies; 9+ messages in thread
From: Aaron Lauterer @ 2020-10-02  8:23 UTC (permalink / raw)
  To: pve-devel

This series implements a new feature which allows users to easily
reassign disks between VMs. Currently this is only possible with one of
the following manual steps:

* rename the disk image/file and do a `qm rescan`
* configure the disk manually and use the old image name, having an
    image for VM A assigned to VM B

The latter can cause unexpected behavior because PVE expects that the
VMID in a disk name always corresponds to the VM it is assigned to. Thus
when a disk, original from VM A was manually configured as disk for VM B
it happens that, when deleting VM A, the disk in question will be
deleted as well because it still had the VMID of VM A in it's name.

To issue a reassign from the CLI run:

qm reassign_disk <source VMID> <target VMID> <drive key>

where <drive key> is the config key of the disk, e.g. ide0, scsi1 and so
on.

The following storage types are implemented at the moment:
* dir based ones
    * directory
    * NFS
    * CIFS
    * gluster
* ZFS
* (thin) LVM
* Ceph RBD

v3 -> v4:
* revert intermediate storage plugin for directory based plugins
* add a `die "not supported"` method in Plugin.pm
* dir based plugins now call the file_reassign_volume method in
  Plugin.pm as the generic file/directory based method
* restored old `volume_has_feature` method in Plugin.pm and override it
  in directory based plugins to check against the new `reassign` feature
  (not too happy about the repetition for each plugin)
* task description mapping has been moved from widget-toolkit to
  pve-manager/utils


v2 -> v3:
* change locking approach
* add more checks
* add intermedia storage plugin for directory based plugins
* use feature flags
* split up the reassign method to have a dedicated method for the
    renaming itself
* handle linked clones
* clean up if disk used to be replicated

I hope I didn't forget anything major.

v1 -> v2:
print info about the new disk volid and key at the end of the job so it
shows up in the CLI output and task log

Changes from RFC -> V1:
* support to reassign unused disks
* digest for target vm config
* reorder the checks a bit
* adding another one to check if the given key for the disk even exists
  in the config.

qemu-server: Aaron Lauterer (2):
  disk reassign: add API endpoint
  cli: disk reassign: add reassign_disk to qm command

 PVE/API2/Qemu.pm        | 156 ++++++++++++++++++++++++++++++++++++++++
 PVE/CLI/qm.pm           |   2 +
 PVE/QemuServer/Drive.pm |   4 ++
 3 files changed, 162 insertions(+)



storage: Aaron Lauterer (1):
  add disk reassign feature

 PVE/Storage.pm                 | 15 ++++++++--
 PVE/Storage/CIFSPlugin.pm      | 19 +++++++++++++
 PVE/Storage/DirPlugin.pm       | 19 +++++++++++++
 PVE/Storage/GlusterfsPlugin.pm | 19 +++++++++++++
 PVE/Storage/LVMPlugin.pm       | 24 ++++++++++++++++
 PVE/Storage/LvmThinPlugin.pm   |  1 +
 PVE/Storage/NFSPlugin.pm       | 19 +++++++++++++
 PVE/Storage/Plugin.pm          | 51 ++++++++++++++++++++++++++++++++++
 PVE/Storage/RBDPlugin.pm       | 31 +++++++++++++++++++++
 PVE/Storage/ZFSPoolPlugin.pm   | 28 +++++++++++++++++++
 10 files changed, 224 insertions(+), 2 deletions(-)

manager: Aaron Lauterer (1):
  ui: tasks: add qmreassign task description

 www/manager6/Utils.js | 3 +++
 1 file changed, 3 insertions(+)


-- 
2.20.1





^ permalink raw reply	[flat|nested] 9+ messages in thread

end of thread, other threads:[~2020-11-20 16:17 UTC | newest]

Thread overview: 9+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-10-02  8:23 [pve-devel] [PATCH v4 serries 0/4] disk reassign: add new feature Aaron Lauterer
2020-10-02  8:23 ` [pve-devel] [PATCH v4 qemu-server 1/4] disk reassign: add API endpoint Aaron Lauterer
2020-11-20 16:17   ` Fabian Grünbichler
2020-10-02  8:23 ` [pve-devel] [PATCH v4 qemu-server 2/4] cli: disk reassign: add reassign_disk to qm command Aaron Lauterer
2020-10-02  8:23 ` [pve-devel] [PATCH v4 storage 3/4] add disk reassign feature Aaron Lauterer
2020-11-20 16:17   ` Fabian Grünbichler
2020-10-02  8:23 ` [pve-devel] [PATCH v4 manager 4/4] ui: tasks: add qmreassign task description Aaron Lauterer
2020-10-30 10:42 ` [pve-devel] [PATCH v4 serries 0/4] disk reassign: add new feature Aaron Lauterer
2020-11-19 10:54   ` Dominic Jäger

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