Failed to add Backup role to 'Server Backup'

MarianAct

Hello,

I recently purchased a VPS for storage purposes and successfully added it to the Enhance Cluster. However, I encountered an issue when attempting to enable the "Backup" role for the server. The following error message was displayed:

Failed to add 'Backup' role to 'Server Backup'.

The 'backups' folder is created by Enhance, but the error appears immediately after. Here is the output of the lsblk command for your reference:
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINTS
loop0 7:0 0 61.9M 1 loop /snap/core20/1405
loop1 7:1 0 63.7M 1 loop /snap/core20/2434
loop2 7:2 0 79.9M 1 loop /snap/lxd/22923
loop3 7:3 0 89.4M 1 loop /snap/lxd/31333
loop4 7:4 0 44.3M 1 loop /snap/snapd/23258
sr0 11:0 1 1024M 0 rom
vda 252:0 0 1T 0 disk
├─vda1 252:1 0 1M 0 part
├─vda2 252:2 0 1023G 0 part /
└─vda3 252:3 0 1G 0 part [SWAP]

I am using /dev/vda2 as the device path. I have also tried specifying a different location (e.g., /srv/backups), but the same error persists.

Has anyone else encountered this issue or have suggestions for resolving it?
Thank you in advance for your help!

rdbf

It should be a partition mounted as a folder. You should make something like a 50GB partition, ext4, mounted as / and then a second partition for the other 950 GB, which Enhance will format as Btrfs and then mount as /backups for example.

It needs to be a separate partition or disk due to the Btrfs snapshot usage.

Pretty much says it all in the documentation
https://enhance.com/docs/backup-role/installing-backup-role.html

MarianAct

rdbf , thanks for the message, I will give it a try and come back with a result.

MarianAct

After reinstalling the machine and correctly configuring the partition settings, I obtained the following output from the lsblk command:

NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINTS
loop0 7:0 0 62M 1 loop /snap/core20/1587
loop1 7:1 0 79.9M 1 loop /snap/lxd/22923
loop2 7:2 0 47M 1 loop /snap/snapd/16292
sr0 11:0 1 1024M 0 rom
vda 252:0 0 1T 0 disk
├─vda1 252:1 0 1M 0 part
├─vda2 252:2 0 60G 0 part /
└─vda3 252:3 0 964G 0 part /backups

Additionally, the output of df -h is as follows:
Filesystem Size Used Avail Use% Mounted on
tmpfs 197M 1.1M 196M 1% /run
/dev/vda2 59G 9.4G 47G 17% /
tmpfs 982M 0 982M 0% /dev/shm
tmpfs 5.0M 0 5.0M 0% /run/lock
/dev/vda3 964G 3.6M 962G 1% /backups
tmpfs 197M 4.0K 197M 1% /run/user/1000

The Backup Server has been successfully added to the Enhance Cluster. However, when attempting to activate the Backup role, the same error persists.

Here is a image of the error.
https://imgur.com/hD1qpYC

Any new suggestions for resolving it?
Thank you in advance.

Rich

MarianAct {"data":{"error":"Imgur is temporarily over capacity. Please try again later."},"success":false,"status":403}

I am going to guess that it's because you've already created the partition, formatted it and mounted it.

It needs to be an unmounted partition that Enhance itself can reformat as btrfs. try unmounting /dev/vda3 then present /dev/vda3 to enhance backup role. It will remount it as /backups once complete.

lsblk output looks fine otherwise.

p.s. since I can't see the error I could be wrong. Just offering a suggestion.

MarianAct

Rich After several attempts to unmount /dev/vda3, I successfully added the Backup role to the Backup Server.

To achieve this, I first identified and terminated the processes using the mounted partition by running lsof +D /backups and using kill to stop the active processes. Next, I performed a lazy unmount with the command umount -l /dev/vda3.

Finally, I was able to assign /dev/vda3 to the Backup role for the server.

Thank you all for your support!

Cheers.

Rich

MarianAct You're most welcome, thank you for giving a detailed report back. No doubt it will help someone else one day.

Enjoy the efficient backups 😉

MarianAct

Hi again,

After completing the backup configuration, I conducted a test by creating a new website and assigning the Backup role to it. While initiating the backup process, I encountered the following error:

{
"id": "27a8897b-b10b-4016-b321-13c6901826d0",
"orgId": "ff8acc85-1e90-4026-aa64-5515f43dfab9",
"kind": "backupError",
"activityObject": {
"content": {
"detail": {
"ok": {
"domain": "mydomain.com",
"orgId": "ff8acc85-1e90-4026-aa64-5515f43dfab9",
"subscriptionId": null
}
},
"id": "0f651fa8-be39-4a47-be2c-c31c86ac561f"
},
"type": "website"
},
"context": {
"error": {
"content": {
"detail": {
"code": "internal",
"message": "Error { kind: Internal, entity: Some(ProcOutput), message: Some(\"stderr: ERROR: not a btrfs filesystem: /backups/0f651fa8-be39-4a47-be2c-c31c86ac561f\n\nstdout: \") }"
}
},
"type": "error"
}
},
"message": null,
"createdAt": "2025-01-11T06:56:44.788846Z"
}

I ran the 'lsblk -f' command, and the FSTYPE of the partition is confirmed to be Btrfs:

NAME FSTYPE FSVER LABEL UUID FSAVAIL FSUSE% MOUNTPOINTS
loop0 squashfs 4.0 0 100% /snap/core20/1587
loop1 squashfs 4.0 0 100% /snap/lxd/22923
loop2 0 100% /snap/snapd/23545
loop3 0 100% /snap/snapd/23258
loop4 0 100% /snap/core20/2434
loop5 0 100% /snap/lxd/31333
sr0
vda
├─vda1
├─vda2 ext4 1.0 a037a64e-ea3d-4a74-822a-5ffe69ccdb0a 44.6G 19% /
└─vda3 btrfs 1487ebbd-c89f-40c8-a440-846cea7d7d67

Any ideas why I am getting the error "not a btrfs filesystem: /backups...?"
I also connected to the server and tried 'btrfs subvolume list /backups' and indeed I got the error:
"ERROR: not a btrfs filesystem: /backups
ERROR: can't access '/backups'"

What's the catch....?

Many thanks.

rdbf

It doesn't look like /backups is mounted.

This seems more like a 'basic linux admin' issue than an Enhance issue.

MarianAct

It is quite puzzling, as the /backups directory appears to be properly mounted. I can confirm this by inspecting the output of lsblk, and I am also able to access, read, and write to the location without issue.

Additionally, the filesystem is indeed formatted as Btrfs, as verified in the /etc/fstab configuration file.

As the next step, I will perform a clean reinstallation of the operating system and reconfigure the partitions. However, this time, I will leave the /backups mount unmounted initially. The issue may be related to the earlier configuration where I mounted the /backups partition during the initial os setup, unmounted it via the CLI, and then allowed Enhance to mount it automatically when choosing the Backup role for the Backup Server.

I will provide updates as soon as possible. In the meantime, if anyone has any suggestions or ideas, please feel free to share them here.

Cheers.

MarianAct

Hi guys,

The issue has been successfully resolved. After reinstalling the once again the operating system, I partitioned the drive as follows:

one 60GB partition, which I mounted
the remainder size as Btrfs, which I left unmounted.

For anyone encountering this issue, please ensure that you partition the drive correctly and avoid mounting the Btrfs partition during the operating system installation. Mounting at os setup and then unmounting the Btrfs partition can potentially cause the same issues I experienced.

At the end, a photo with a smooth and nice backup system, thank you Enhance.
https://ibb.co/xjQ42wt

Thanks everybody,
Cheers.