btrbk
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20 hours ago •
digint
digint
Create backups of "/@"
First of all, thank you for this great script! Unfortunately I cannot get it to work in my environment, maybe somebody can help. I'm sure I missed something, but I don't know what.
Current output of btrfs subvolume list /
ID 1419 gen 6620027 top level 5 path timeshift-btrfs/snapshots/2019-12-05_02-37-02/@
ID 1422 gen 6620027 top level 5 path timeshift-btrfs/snapshots/2019-12-07_18-48-50/@
ID 1428 gen 6621866 top level 5 path timeshift-btrfs/snapshots/2019-12-12_03-00-02/@
ID 1431 gen 6627067 top level 5 path @
ID 1432 gen 6621866 top level 5 path timeshift-btrfs/snapshots/2019-12-14_20-00-02/@
As you see, I am using timeshift for snapshots. I like to use it in the future too, because it has an GUI and is really easy to restore snapshots with it.
My root subvolume is @ mounted at /. I read about converting the root subvolume @ to a subvolume rootfs, but I thought it should work this way too...
Current output, when running btrbk dryrun:
btrbk command line client, version 0.29.0 (Sun Dec 15 13:07:03 2019)
Using configuration: /etc/btrbk/system-backup.conf
WARNING: Skipping subvolume "//@": Failed to fetch subvolume detail
WARNING: ... sh: readlink -v -e //@
WARNING: ... readlink: //@: No such file or directory
Completed within: 0s (Sun Dec 15 13:07:03 2019)
--------------------------------------------------------------------------------
Backup Summary (btrbk command line client, version 0.29.0)
Date: Sun Dec 15 13:07:03 2019
Config: /etc/btrbk/system-backup.conf
Dryrun: YES
Legend:
=== up-to-date subvolume (source snapshot)
+++ created subvolume (source snapshot)
--- deleted subvolume
*** received subvolume (non-incremental)
>>> received subvolume (incremental)
--------------------------------------------------------------------------------
//@
!!! Aborted: Failed to fetch subvolume detail
NOTE: Some errors occurred, which may result in missing backups!
Please check warning and error messages above.
NOTE: Dryrun was active, none of the operations above were actually executed!
Current backup-system.conf:
snapshot_dir btrbk_snapshot
snapshot_preserve_min 2d
snapshot_preserve 14d
target_preserve_min no
target_preserve 20d 10w *m
archive_preserve_min latest
archive_preserve 12m 10y
volume /
# no action if external disk is not attached
snapshot_create ondemand
# propagates to all subvolume sections:
target /mnt/347377a5-71a6-4803-a485-d0077ab1bc34/backup-system
subvolume @
Thank you!
WARNING: ... sh: readlink -v -e //@
WARNING: ... readlink: //@: No such file or directory
This tells me that /@ does not exist. I guess that the subvolume @ is mounted as / on your system. You can check this by running btrbk ls -L /, it should then tell you MOUNT_SUBVOLUME=@, MOUNT_POINT=/ if I'm correct.
Just mount the root subvolume (subvolid=5) to somewhere else, so that @ is accessible from there, e.g. mount -s subvolid=5 /dev/XXX /mnt/btr_pool. Then adapt your config to volume /mnt/btr_pool, and things should work.
Hi, I want to use this thread because I want to address the same question. However, my BTRFS layout looks different; it is based on SUSE's default layout + 1 modification for subvolid=5.
This is the output of btrbk ls -L /:
# btrbk ls -L /
MOUNT_SOURCE ID TOP CGEN GEN UUID PARENT_UUID RECEIVED_UUID FLAGS PATH
/dev/sda2 257 5 7 559099 7590c396-bb30-824d-b697-036984a63c72 - - /
/dev/sda2 277 257 4934 559091 a62ac5e1-1fb1-304c-827e-0a87c5e045fb - - - //.snapshots
/dev/sda2 278 277 4954 4954 637e2171-d2ac-9f47-8f87-3896e0054541 7590c396-bb30-824d-b697-036984a63c72 - readonly //.snapshots/1/snapshot
/dev/sda2 466 277 413821 413822 a890b67b-cedb-5743-8ad9-3c71eaaa00c6 7590c396-bb30-824d-b697-036984a63c72 - readonly //.snapshots/102/snapshot
/dev/sda2 515 277 413948 413948 ed816b24-15c0-7741-9a90-4fa0c2ec19ac 7590c396-bb30-824d-b697-036984a63c72 - readonly //.snapshots/109/snapshot
/dev/sda2 516 277 413954 413955 cb5cb3bc-dd1f-3549-9333-345b2caadb47 7590c396-bb30-824d-b697-036984a63c72 - readonly //.snapshots/110/snapshot
[...]
/dev/sda2 617 277 559089 559090 489c1e41-91ae-1242-8b68-f492f923d7df 7590c396-bb30-824d-b697-036984a63c72 - readonly //.snapshots/180/snapshot
/dev/sda2 462 277 413798 413798 47246aad-e229-2244-85ac-d5379f4816c8 7590c396-bb30-824d-b697-036984a63c72 - readonly //.snapshots/98/snapshot
/dev/sda2 463 277 413804 413805 f6c77705-e072-8e4b-91bf-693985168b53 7590c396-bb30-824d-b697-036984a63c72 - readonly //.snapshots/99/snapshot
/dev/sda2 268 257 33 413698 0c7f3842-30ed-a04c-bcc0-b0160c4fae2e - - - //boot/grub2/i386-pc
/dev/sda2 267 257 31 413941 72df5c4a-cbd0-3049-be31-346b702a0bb4 - - - //boot/grub2/x86_64-efi
/dev/sda2 266 257 29 559091 72ec6863-e265-1945-8a11-57a6f1bf8782 - - - //home
/dev/sda2 265 257 27 557608 f1a3603f-519c-924f-af55-58f9fb753a65 - - - //opt
/dev/sda2 264 257 25 559114 90e343fd-3aad-e44e-919b-8193a6487f6b - - - //root
/dev/sda2 263 257 23 413698 da923b55-58d7-0443-9abf-cdd080190b08 - - - //srv
/dev/sda2 262 257 21 559121 fcbfffcd-03e0-1045-8a44-259ec0a7612f - - - //tmp
/dev/sda2 261 257 19 430378 f0036d66-0aa1-374c-b1e5-cc682969b83f - - - //usr/local
/dev/sda2 259 257 15 413698 d71140d9-d5c1-9446-9a23-8c09de8a53ee - - - //usr/sap
/dev/sda2 260 259 17 413698 4448003f-8b86-444d-b30a-5031589dd9ab - - - //usr/sap/hostctrl
/dev/sda2 258 257 11 559122 6712dc5e-808f-5243-84d9-00d2067da76d - - - //var
/dev/sda2 550 258 430343 430344 3cf72f72-5dd3-e846-8dbe-780c4cfcbef9 - - - //var/lib/images
/dev/sda2 268 257 33 413698 0c7f3842-30ed-a04c-bcc0-b0160c4fae2e - - - /boot/grub2/i386-pc
/dev/sda2 267 257 31 413941 72df5c4a-cbd0-3049-be31-346b702a0bb4 - - - /boot/grub2/x86_64-efi
/dev/sda2 5 0 0 4038 - - - - /btrfs
/dev/sda2 257 5 7 559099 7590c396-bb30-824d-b697-036984a63c72 - - - /btrfs/@
/dev/sda2 277 257 4934 559091 a62ac5e1-1fb1-304c-827e-0a87c5e045fb - - - /btrfs/@/.snapshots
/dev/sda2 278 277 4954 4954 637e2171-d2ac-9f47-8f87-3896e0054541 7590c396-bb30-824d-b697-036984a63c72 - readonly /btrfs/@/.snapshots/1/snapshot
/dev/sda2 466 277 413821 413822 a890b67b-cedb-5743-8ad9-3c71eaaa00c6 7590c396-bb30-824d-b697-036984a63c72 - readonly /btrfs/@/.snapshots/102/snapshot
/dev/sda2 515 277 413948 413948 ed816b24-15c0-7741-9a90-4fa0c2ec19ac 7590c396-bb30-824d-b697-036984a63c72 - readonly /btrfs/@/.snapshots/109/snapshot
/dev/sda2 516 277 413954 413955 cb5cb3bc-dd1f-3549-9333-345b2caadb47 7590c396-bb30-824d-b697-036984a63c72 - readonly /btrfs/@/.snapshots/110/snapshot
[...]
/dev/sda2 617 277 559089 559090 489c1e41-91ae-1242-8b68-f492f923d7df 7590c396-bb30-824d-b697-036984a63c72 - readonly //.snapshots/180/snapshot
/dev/sda2 462 277 413798 413798 47246aad-e229-2244-85ac-d5379f4816c8 7590c396-bb30-824d-b697-036984a63c72 - readonly //.snapshots/98/snapshot
/dev/sda2 463 277 413804 413805 f6c77705-e072-8e4b-91bf-693985168b53 7590c396-bb30-824d-b697-036984a63c72 - readonly //.snapshots/99/snapshot
/dev/sda2 268 257 33 413698 0c7f3842-30ed-a04c-bcc0-b0160c4fae2e - - - //boot/grub2/i386-pc
/dev/sda2 267 257 31 413941 72df5c4a-cbd0-3049-be31-346b702a0bb4 - - - //boot/grub2/x86_64-efi
/dev/sda2 266 257 29 559091 72ec6863-e265-1945-8a11-57a6f1bf8782 - - - //home
/dev/sda2 265 257 27 557608 f1a3603f-519c-924f-af55-58f9fb753a65 - - - //opt
/dev/sda2 264 257 25 559114 90e343fd-3aad-e44e-919b-8193a6487f6b - - - //root
/dev/sda2 263 257 23 413698 da923b55-58d7-0443-9abf-cdd080190b08 - - - //srv
/dev/sda2 262 257 21 559121 fcbfffcd-03e0-1045-8a44-259ec0a7612f - - - //tmp
/dev/sda2 261 257 19 430378 f0036d66-0aa1-374c-b1e5-cc682969b83f - - - //usr/local
/dev/sda2 259 257 15 413698 d71140d9-d5c1-9446-9a23-8c09de8a53ee - - - //usr/sap
/dev/sda2 260 259 17 413698 4448003f-8b86-444d-b30a-5031589dd9ab - - - //usr/sap/hostctrl
/dev/sda2 258 257 11 559122 6712dc5e-808f-5243-84d9-00d2067da76d - - - //var
/dev/sda2 550 258 430343 430344 3cf72f72-5dd3-e846-8dbe-780c4cfcbef9 - - - //var/lib/images
/dev/sda2 268 257 33 413698 0c7f3842-30ed-a04c-bcc0-b0160c4fae2e - - - /boot/grub2/i386-pc
/dev/sda2 267 257 31 413941 72df5c4a-cbd0-3049-be31-346b702a0bb4 - - - /boot/grub2/x86_64-efi
/dev/sda2 5 0 0 4038 - - - - /btrfs
/dev/sda2 257 5 7 559099 7590c396-bb30-824d-b697-036984a63c72 - - - /btrfs/@
/dev/sda2 277 257 4934 559091 a62ac5e1-1fb1-304c-827e-0a87c5e045fb - - - /btrfs/@/.snapshots
/dev/sda2 278 277 4954 4954 637e2171-d2ac-9f47-8f87-3896e0054541 7590c396-bb30-824d-b697-036984a63c72 - readonly /btrfs/@/.snapshots/1/snapshot
/dev/sda2 466 277 413821 413822 a890b67b-cedb-5743-8ad9-3c71eaaa00c6 7590c396-bb30-824d-b697-036984a63c72 - readonly /btrfs/@/.snapshots/102/snapshot
/dev/sda2 515 277 413948 413948 ed816b24-15c0-7741-9a90-4fa0c2ec19ac 7590c396-bb30-824d-b697-036984a63c72 - readonly /btrfs/@/.snapshots/109/snapshot
[...]
/dev/sda2 617 277 559089 559090 489c1e41-91ae-1242-8b68-f492f923d7df 7590c396-bb30-824d-b697-036984a63c72 - readonly /btrfs/@/.snapshots/180/snapshot
/dev/sda2 462 277 413798 413798 47246aad-e229-2244-85ac-d5379f4816c8 7590c396-bb30-824d-b697-036984a63c72 - readonly /btrfs/@/.snapshots/98/snapshot
/dev/sda2 463 277 413804 413805 f6c77705-e072-8e4b-91bf-693985168b53 7590c396-bb30-824d-b697-036984a63c72 - readonly /btrfs/@/.snapshots/99/snapshot
/dev/sda2 268 257 33 413698 0c7f3842-30ed-a04c-bcc0-b0160c4fae2e - - - /btrfs/@/boot/grub2/i386-pc
/dev/sda2 267 257 31 413941 72df5c4a-cbd0-3049-be31-346b702a0bb4 - - - /btrfs/@/boot/grub2/x86_64-efi
/dev/sda2 266 257 29 559091 72ec6863-e265-1945-8a11-57a6f1bf8782 - - - /btrfs/@/home
/dev/sda2 265 257 27 557608 f1a3603f-519c-924f-af55-58f9fb753a65 - - - /btrfs/@/opt
/dev/sda2 264 257 25 559114 90e343fd-3aad-e44e-919b-8193a6487f6b - - - /btrfs/@/root
/dev/sda2 263 257 23 413698 da923b55-58d7-0443-9abf-cdd080190b08 - - - /btrfs/@/srv
/dev/sda2 262 257 21 559121 fcbfffcd-03e0-1045-8a44-259ec0a7612f - - - /btrfs/@/tmp
/dev/sda2 261 257 19 430378 f0036d66-0aa1-374c-b1e5-cc682969b83f - - - /btrfs/@/usr/local
/dev/sda2 259 257 15 413698 d71140d9-d5c1-9446-9a23-8c09de8a53ee - - - /btrfs/@/usr/sap
/dev/sda2 260 259 17 413698 4448003f-8b86-444d-b30a-5031589dd9ab - - - /btrfs/@/usr/sap/hostctrl
/dev/sda2 258 257 11 559122 6712dc5e-808f-5243-84d9-00d2067da76d - - - /btrfs/@/var
/dev/sda2 550 258 430343 430344 3cf72f72-5dd3-e846-8dbe-780c4cfcbef9 - - - /btrfs/@/var/lib/images
/dev/sda2 266 257 29 559091 72ec6863-e265-1945-8a11-57a6f1bf8782 - - - /home
/dev/sda2 265 257 27 557608 f1a3603f-519c-924f-af55-58f9fb753a65 - - - /opt
/dev/sda2 264 257 25 559114 90e343fd-3aad-e44e-919b-8193a6487f6b - - - /root
/dev/sda2 263 257 23 413698 da923b55-58d7-0443-9abf-cdd080190b08 - - - /srv
/dev/sda2 262 257 21 559121 fcbfffcd-03e0-1045-8a44-259ec0a7612f - - - /tmp
/dev/sda2 261 257 19 430378 f0036d66-0aa1-374c-b1e5-cc682969b83f - - - /usr/local
/dev/sda2 259 257 15 413698 d71140d9-d5c1-9446-9a23-8c09de8a53ee - - - /usr/sap
/dev/sda2 260 259 17 413698 4448003f-8b86-444d-b30a-5031589dd9ab - - - /usr/sap/hostctrl
/dev/sda2 258 257 11 559122 6712dc5e-808f-5243-84d9-00d2067da76d - - - /var
/dev/sda2 550 258 430343 430344 3cf72f72-5dd3-e846-8dbe-780c4cfcbef9 - - - /var/lib/images
The top-level subvolume (with id=5) is mounted to /btrfs. Subvolumes on the next level (starting with id=257) are named @, home, var, root, etc. I'm using snapper to create snapshots (automatically) in /.snapshots.
The backups should be stored in /backup_rbd; this is a Rados Block Device (on a central software-defined storage cluster).
This block device is formatted in XFS and serves any application backups (incl. DB backups).
Question: Can I use this RBD (with XFS) for creating backups? Which volume should I use in config?
THX
Sorry for the late reply, I was very busy lately...
Can I use this RBD (with XFS) for creating backups?
No, the target need to be btrfs filesystem as well, unless you want to create raw backups (see btrbk.conf(5) TARGET TYPES for details)