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script to automate luksHeaderBackup for multiple partitions

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I have several servers each with at least six dm-crypt partitions. I would like to have an automated way to make sure I always have a luks header backup stored in a safe place. I've been making header backups manually until now. My problem with that is that I tend to forget to make a new luks header backup when I have to swap out a hard drive or make other system changes.

I'm looking for an existing script that will check to see if a luks header backup exists, and if not, create one. I have to assume somebody has written such a script already. (The need for it seems obvious.)

If one does not exist, I'll attempt to make a bash script for the purpose.

My manual commands look like this:

cryptsetup luksHeaderBackup /dev/sdXN --header-backup-file /path/to/backup/$mountpoint_luksHeader_$devUUID.img

I would like to have both the mountpoint and the device UUID in the file name of the header image file.

The only clue I have about getting started is that I would need to iterate through all devices and find the partitions of type crypt, then find the corresponding mount point and UUID. I know most of that info exists in lsblk and blkid. I'm not sure how to extract it for use in a script.

scripting luks

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asked 4 mins ago

MountainXMountainX

5,3762882137

add a comment | 

0

I have several servers each with at least six dm-crypt partitions. I would like to have an automated way to make sure I always have a luks header backup stored in a safe place. I've been making header backups manually until now. My problem with that is that I tend to forget to make a new luks header backup when I have to swap out a hard drive or make other system changes.

I'm looking for an existing script that will check to see if a luks header backup exists, and if not, create one. I have to assume somebody has written such a script already. (The need for it seems obvious.)

If one does not exist, I'll attempt to make a bash script for the purpose.

My manual commands look like this:

cryptsetup luksHeaderBackup /dev/sdXN --header-backup-file /path/to/backup/$mountpoint_luksHeader_$devUUID.img

I would like to have both the mountpoint and the device UUID in the file name of the header image file.

The only clue I have about getting started is that I would need to iterate through all devices and find the partitions of type crypt, then find the corresponding mount point and UUID. I know most of that info exists in lsblk and blkid. I'm not sure how to extract it for use in a script.

scripting luks

share

asked 4 mins ago

MountainXMountainX

5,3762882137

add a comment | 

I have several servers each with at least six dm-crypt partitions. I would like to have an automated way to make sure I always have a luks header backup stored in a safe place. I've been making header backups manually until now. My problem with that is that I tend to forget to make a new luks header backup when I have to swap out a hard drive or make other system changes.

I'm looking for an existing script that will check to see if a luks header backup exists, and if not, create one. I have to assume somebody has written such a script already. (The need for it seems obvious.)

If one does not exist, I'll attempt to make a bash script for the purpose.

My manual commands look like this:

cryptsetup luksHeaderBackup /dev/sdXN --header-backup-file /path/to/backup/$mountpoint_luksHeader_$devUUID.img

I would like to have both the mountpoint and the device UUID in the file name of the header image file.

The only clue I have about getting started is that I would need to iterate through all devices and find the partitions of type crypt, then find the corresponding mount point and UUID. I know most of that info exists in lsblk and blkid. I'm not sure how to extract it for use in a script.

scripting luks

share

asked 4 mins ago

MountainXMountainX

5,3762882137

cryptsetup luksHeaderBackup /dev/sdXN --header-backup-file /path/to/backup/$mountpoint_luksHeader_$devUUID.img

share

asked 4 mins ago

MountainXMountainX

5,3762882137

share

asked 4 mins ago

MountainXMountainX

5,3762882137

asked 4 mins ago

MountainXMountainX

5,3762882137

asked 4 mins ago

MountainXMountainX

5,3762882137