From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: <pve-devel-bounces@lists.proxmox.com> Received: from firstgate.proxmox.com (firstgate.proxmox.com [212.224.123.68]) by lore.proxmox.com (Postfix) with ESMTPS id 4F87B1FF16F for <inbox@lore.proxmox.com>; Tue, 15 Apr 2025 15:31:55 +0200 (CEST) Received: from firstgate.proxmox.com (localhost [127.0.0.1]) by firstgate.proxmox.com (Proxmox) with ESMTP id 6350F8A48; Tue, 15 Apr 2025 15:31:52 +0200 (CEST) Date: Tue, 15 Apr 2025 15:31:18 +0200 From: Wolfgang Bumiller <w.bumiller@proxmox.com> To: Daniel Kral <d.kral@proxmox.com> Message-ID: <wp6iyf3ylrdu2lgrcrmhfk57x2j3xgsyvzntmphw33j6asmjdp@6inpwihnpyvk> References: <20250211160825.254167-1-d.kral@proxmox.com> <20250211160825.254167-24-d.kral@proxmox.com> <2b549a4a-d9c4-47da-9eb2-2b782ff1dab1@proxmox.com> <727ecb15-c82c-4ed4-bad3-676d54bddf3e@proxmox.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <727ecb15-c82c-4ed4-bad3-676d54bddf3e@proxmox.com> X-SPAM-LEVEL: Spam detection results: 0 AWL 0.081 Adjusted score from AWL reputation of From: address BAYES_00 -1.9 Bayes spam probability is 0 to 1% DMARC_MISSING 0.1 Missing DMARC policy KAM_DMARC_STATUS 0.01 Test Rule for DKIM or SPF Failure with Strict Alignment RCVD_IN_VALIDITY_CERTIFIED_BLOCKED 0.001 ADMINISTRATOR NOTICE: The query to Validity was blocked. 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SPF_HELO_NONE 0.001 SPF: HELO does not publish an SPF Record SPF_PASS -0.001 SPF: sender matches SPF record Subject: Re: [pve-devel] [PATCH container v2 03/11] alloc_disk: fail fast if storage does not support content type rootdir X-BeenThere: pve-devel@lists.proxmox.com X-Mailman-Version: 2.1.29 Precedence: list List-Id: Proxmox VE development discussion <pve-devel.lists.proxmox.com> List-Unsubscribe: <https://lists.proxmox.com/cgi-bin/mailman/options/pve-devel>, <mailto:pve-devel-request@lists.proxmox.com?subject=unsubscribe> List-Archive: <http://lists.proxmox.com/pipermail/pve-devel/> List-Post: <mailto:pve-devel@lists.proxmox.com> List-Help: <mailto:pve-devel-request@lists.proxmox.com?subject=help> List-Subscribe: <https://lists.proxmox.com/cgi-bin/mailman/listinfo/pve-devel>, <mailto:pve-devel-request@lists.proxmox.com?subject=subscribe> Reply-To: Proxmox VE development discussion <pve-devel@lists.proxmox.com> Cc: Proxmox VE development discussion <pve-devel@lists.proxmox.com> Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: pve-devel-bounces@lists.proxmox.com Sender: "pve-devel" <pve-devel-bounces@lists.proxmox.com> On Tue, Apr 15, 2025 at 02:27:24PM +0200, Daniel Kral wrote: > On 2/20/25 13:15, Fiona Ebner wrote: > > I also noticed that we have no check against starting a container with > > volumes on a storage that does not support 'rootdir'. We have such a > > check for VMs IIRC. Prohibiting that would also be good, but maybe > > something for PVE 9 where we can also check for misconfigured > > containers/storages via the pve8to9 script up front so users can adapt. > > I'm preparing the v3 for this now, but I just noticed there actually is a > assertion for this since e6da5357cc ("fix #3421: allow custom storage > plugins to support rootfs") if I'm not missing something here in > __mountpoint_mount(...). > > What I don't yet understand is why there is no similar check for this in > __mountpoint_mount for subvolumes, e.g. I can't start the container if I > have a mountpoint on a directory storage without 'rootdir' support, but I > can do so if the mountpoint is on a zfs pool without 'rootdir' support. > > Since starting the container results in > > run_buffer: 571 Script exited with status 25 > lxc_init: 845 Failed to run lxc.hook.pre-start for container "101" > __lxc_start: 2034 Failed to initialize container "101" > TASK ERROR: startup for container '101' failed > > for the WebGUI, I'll try to squeeze in a patch to make the error message a > little more readable if there's something going wrong when mounting. > > --- > > On another note, I've also noticed that if the root disk / mountpoint is > already on a storage which does not support 'rootdir', the user is unable to > move it to another storage... Shouldn't we allow users to do that so they > can easily move out error states? Either way, this can be a follow-up anway, > so no need to make this patch series any longer. The `rootdir` content type is generally a bit wonky currently. The problem is we're mixing content types and "allowed contents" together: For ZFS and btrfs we use subvolumes which are their own *content type*: "subvol". For *other* directory storages, we have a special case for `size=0` where we have a directory of an "unlimited" size, which is also considered to be of *content type* "subvol". In the other case we actually allocate the content type *image*, *BUT*(!!!) the Plugin.pm's default `list_volumes` implementation will artificially *name* it "rootdir" *if* the *associated VMID* is from a container by querying the VM list via `PVE::Cluster::get_vmlist()`. This is not something we can ask external storage plugin devs to do, IMO. *rootdir* as an actual *content type* does not *really* exist in pve-storage, other than as a remnant from openvz times for directories under the `rootdir/` directory on a directory storage, which I'm fairly certain we don't support in pve-container... This means that currently what is referred to as the "rootdir" content type is actually just the *permission* to put containers on the storage. This is something we really need to fix up with PVE9 one way or another. Personally I'd argue the content type should disappear entirely. `list_volumes` should call use the correct type (images or subvol), and the rootdir content permission should (and always / indepenent from the storage and what *content type* we create) in pve-container's disk allocation code. _______________________________________________ pve-devel mailing list pve-devel@lists.proxmox.com https://lists.proxmox.com/cgi-bin/mailman/listinfo/pve-devel