On 29/10/2025 14:39, Filip Schauer wrote:
Tested read-only: Works as expected.
Tested live migration with both find-paths and file-handles while
reading a small file:
1. Opened file on first node
2. Read a few bytes from the open file handle
3. Migrated the VM to the second node
4. Read some more bytes from the open file handle
This worked fine.
Tested live migration while copying a 1GiB file within the virtiofs:
1. Mounted a CIFS share on all nodes and configured the directory
mappings with `file-handles` as the live migration method
2. Created a 1GiB file: `dd if=/dev/urandom of=testA bs=4M count=256`
3. Started a copy inside the VM:
`/mnt/virtiofs# dd if=testA of=testB status=progress`
4. Started a live migration
5. Immediately after migration dd failed with:
```
dd: error reading 'testA': Input/output error
dd: closing input file 'testA': Input/output error
```
I tried the same with Live Migration Method set to `find-paths`.
This also failed upon migration. This time with:
```
dd: writing to 'testB': Input/output error
dd: closing input file 'testA': Input/output error
```
I did some more testing of virtiofs + dd + live migration to see if
reading/writing to virtiofs works after migration.
I tested the following configurations:
virtiofs backing fs on host live mig. method write works? read works?
NFS find-paths yes yes
NFS file-handles I/O error yes
CephFS find-paths yes yes
CephFS file-handles I/O error I/O error
CIFS find-paths I/O error I/O error
CIFS file-handles I/O error yes
CephFS + file-handles target-node journal upon migration:
Nov 03 18:26:41 pve1 virtiofsd[39002]: pve1 virtiofsd[38999]: Invalid
inode 7 indexed: Opening file handle: Operation not permitted (os error 1)
Nov 03 18:26:41 pve1 virtiofsd[39002]: pve1 virtiofsd[38999]: Invalid
inode 6 indexed: Opening file handle: Operation not permitted (os error 1)
Nov 03 18:26:41 pve1 virtiofsd[39002]: pve1 virtiofsd[38999]: Invalid
inode 5 indexed: Opening file handle: Operation not permitted (os error 1)
Nov 03 18:26:41 pve1 virtiofsd[39002]: pve1 virtiofsd[38999]: Invalid
inode 4 indexed: Opening file handle: Operation not permitted (os error 1)
Nov 03 18:26:41 pve1 virtiofsd[39002]: pve1 virtiofsd[38999]: Invalid
inode 3 indexed: Opening file handle: Operation not permitted (os error 1)
Nov 03 18:26:41 pve1 virtiofsd[39002]: pve1 virtiofsd[38999]: Invalid
inode 2 indexed: Opening file handle: Operation not permitted (os error 1)
CIFS + find-paths source-node journal upon migration:
Nov 03 17:34:43 pve1 virtiofsd[26642]: pve1 virtiofsd[26639]: Inode 7:
Operation not supported (os error 95)
Nov 03 17:34:47 pve1 virtiofsd[26642]: pve1 virtiofsd[26639]: Inode 7:
Operation not supported (os error 95)
Nov 03 17:34:47 pve1 virtiofsd[26642]: pve1 virtiofsd[26639]: Failed to
serialize inode 1 (st_dev=45, mnt_id=511, st_ino=34): Failed to
reconstruct inode location; marking as invalid
Nov 03 17:34:47 pve1 virtiofsd[26642]: pve1 virtiofsd[26639]: Failed to
serialize inode 7 (st_dev=45, mnt_id=511, st_ino=144): Failed to
reconstruct inode location; marking as invalid
CIFS + find-paths target-node journal upon migration:
Nov 03 17:34:47 pve2 virtiofsd[26266]: pve2 virtiofsd[26264]: Invalid
inode 1 indexed: Migration source has lost inode 1
Nov 03 17:34:47 pve2 virtiofsd[26266]: pve2 virtiofsd[26264]: Invalid
inode 7 indexed: Migration source has lost inode 7
_______________________________________________
pve-devel mailing list
[email protected]
https://lists.proxmox.com/cgi-bin/mailman/listinfo/pve-devel
