From: Fabian Ebner <f.ebner@proxmox.com>
To: pve-devel@lists.proxmox.com, Aaron Lauterer <a.lauterer@proxmox.com>
Subject: Re: [pve-devel] [PATCH v2 storage qemu-server container 0/9] move disk or volume to other guets
Date: Fri, 13 Aug 2021 10:29:23 +0200 [thread overview]
Message-ID: <2a36a40c-5110-e7c3-d6b2-e379cfb20ace@proxmox.com> (raw)
In-Reply-To: <20210806134647.632054-1-a.lauterer@proxmox.com>
Looking very good to me. Except for the issue(s) with the source being a
linked clone, I only had very minor complaints. Everything else worked
as advertised, and the find_free_volname keeps the interface tidy.
Am 06.08.21 um 15:46 schrieb Aaron Lauterer:
> This is the continuation of 'disk-reassign' but instead of a separate
> API endpoint we now follow the approach to make it part of the
> 'move-disk' and 'move-volume' endpoints for VMs and containers.
>
> The main idea is to make it easy to move a disk/volume to another guest.
> Currently this is a manual and error prone process that requires
> knowledge of how PVE handles disks/volumes and the mapping which guest
> they belong to.
>
> With this, the 'qm move-disk' and 'pct move-volume' are changed in the
> way that the storage parameter is optional as well as the new
> target-vmid and target-{disk,volume}. This will keep old calls to move the
> disk/volume to another storage working. To move to another guest, the
> storage needs to be omitted.
>
> Major changes since the last iteration as dedicated API endpoint [0] are
> that the storage layer only implements the renaming itself. The layer
> above (qemu-server and pve-container) define the name of the new
> volume/disk. Therefore it was necessary to expose the new
> 'find_free_volname' function. The rename function on the storage layer
> handles possible template references and the creation of the new volid
> as that is highly dependent on the actual storage.
>
> The following storage types are implemented at the moment:
> * dir based ones
> * ZFS
> * (thin) LVM
> * Ceph RBD
>
>
> Most parts of the disk-reassign code has been taken and moved into the
> 'move_disk' and 'move_volume' endpoints with conditional checking if the
> reassign code or the move to other storage code is meant to run
> depending on the given parameters.
>
> Changes since v1 [2] (thx @ Fabian_E for the reviews!):
> * drop exposed 'find_free_diskname' method
> * drop 'wants_fmt_suffix' method (not needed anymore)
> * introduce 'find_free_volname' which decides if only the diskname is
> needed or the longer path for directory based storages
> * use $source_volname instead of $source_volid -> avoids some extra
> calls to get to $source_volname again
> * make --target-{disk,volume} optional and fall back to source key
> * smaller fixes in code quality and using existing functions like
> 'parse_volname' instead of a custom regex (possible with the new
> changes)
>
>
> Changes since the RFC [1]:
> * added check if target guest is replicated and fail if storage does not
> support replication
> * only pass minimum of needed parameters to the storage layer and infer
> other needed information from that
> * lock storage and check if the volume aready exists (handling a
> possible race condition between calling find_free_disk and the actual
> renaming)
> * use a helper method to determine if the plugin needs the fmt suffix
> in the volume name
> * getting format of the source and pass it to find_free_disk
> * style fixes (long lines, multiline post-if, ...)
>
> [0] https://lists.proxmox.com/pipermail/pve-devel/2021-April/047481.html
> [1] https://lists.proxmox.com/pipermail/pve-devel/2021-June/048400.html
> [2] https://lists.proxmox.com/pipermail/pve-devel/2021-July/049445.html
>
> storage: Aaron Lauterer (2):
> storage: add new find_free_volname
> add disk rename feature
>
> PVE/Storage.pm | 29 +++++++++++++++++--
> PVE/Storage/LVMPlugin.pm | 24 ++++++++++++++++
> PVE/Storage/LvmThinPlugin.pm | 1 +
> PVE/Storage/Plugin.pm | 54 ++++++++++++++++++++++++++++++++++++
> PVE/Storage/RBDPlugin.pm | 28 +++++++++++++++++++
> PVE/Storage/ZFSPoolPlugin.pm | 24 ++++++++++++++++
> 6 files changed, 158 insertions(+), 2 deletions(-)
>
>
> qemu-server: Aaron Lauterer (4):
> cli: qm: change move_disk to move-disk
> Drive: add valid_drive_names_with_unused
> api: move-disk: add move to other VM
> api: move-disk: cleanup very long lines
>
> PVE/API2/Qemu.pm | 263 ++++++++++++++++++++++++++++++++++++++--
> PVE/CLI/qm.pm | 3 +-
> PVE/QemuServer/Drive.pm | 4 +
> 3 files changed, 259 insertions(+), 11 deletions(-)
>
> container: Aaron Lauterer (3):
> cli: pct: change move_volume to move-volume
> api: move-volume: add move to another container
> api: move-volume: cleanup very long lines
>
> src/PVE/API2/LXC.pm | 301 ++++++++++++++++++++++++++++++++++++++++----
> src/PVE/CLI/pct.pm | 3 +-
> 2 files changed, 276 insertions(+), 28 deletions(-)
>
prev parent reply other threads:[~2021-08-13 8:30 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-06 13:46 Aaron Lauterer
2021-08-06 13:46 ` [pve-devel] [PATCH v2 storage 1/9] storage: add new find_free_volname Aaron Lauterer
2021-08-12 12:50 ` Fabian Ebner
2021-08-13 12:46 ` Aaron Lauterer
2021-08-06 13:46 ` [pve-devel] [PATCH storage 2/9] add disk rename feature Aaron Lauterer
2021-08-12 12:51 ` Fabian Ebner
2021-08-06 13:46 ` [pve-devel] [PATCH v2 qemu-server 3/9] cli: qm: change move_disk to move-disk Aaron Lauterer
2021-08-06 13:46 ` [pve-devel] [PATCH v2 qemu-server 4/9] Drive: add valid_drive_names_with_unused Aaron Lauterer
2021-08-06 13:46 ` [pve-devel] [PATCH v2 qemu-server 5/9] api: move-disk: add move to other VM Aaron Lauterer
2021-08-13 7:41 ` Fabian Ebner
2021-08-13 15:35 ` Aaron Lauterer
2021-09-01 9:48 ` Fabian Ebner
2021-08-06 13:46 ` [pve-devel] [PATCH v2 qemu-server 6/9] api: move-disk: cleanup very long lines Aaron Lauterer
2021-08-06 13:46 ` [pve-devel] [PATCH v2 container 7/9] cli: pct: change move_volume to move-volume Aaron Lauterer
2021-08-06 13:46 ` [pve-devel] [PATCH v2 container 8/9] api: move-volume: add move to another container Aaron Lauterer
2021-08-13 8:21 ` Fabian Ebner
2021-08-06 13:46 ` [pve-devel] [PATCH v2 container 9/9] api: move-volume: cleanup very long lines Aaron Lauterer
2021-08-13 8:29 ` Fabian Ebner [this message]
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