Trying to extend my LVM encrypted root partition

Hi all

I'm getting short of disk space, so I'd like to extend my root partition as I still have plenty of space available on the disk.

See these lsblk commands : sda5_crypt isn't full but machine--vg-root almost is.

$ lsblk
NAME                     MAJ:MIN RM   SIZE RO TYPE  MOUNTPOINT
sda                        8:0    0 298,1G  0 disk  
├─sda1                     8:1    0   243M  0 part  /boot
├─sda2                     8:2    0     1K  0 part  
└─sda5                     8:5    0 297,9G  0 part  
  └─sda5_crypt           254:0    0 297,9G  0 crypt 
    ├─machine--vg-root   254:1    0 178,6G  0 lvm   /
    └─machine--vg-swap_1 254:2    0   7,7G  0 lvm   [SWAP]

$ lsblk -afs
NAME               FSTYPE      FSVER    LABEL UUID                                   FSAVAIL FSUSE% MOUNTPOINT
sda1               ext2        1.0            7a6d6f6f-3f57-4401-8118-cd28207dfe48    113,7M    47% /boot
└─sda                                                                                               
sda2                                                                                                
└─sda                                                                                               
machine--vg-root   ext4        1.0            58c6d4c9-7d38-449a-891b-5b7ffe4871e6     10,5G    89% /
└─sda5_crypt       LVM2_member LVM2 001       csKLdw-orf1-ZEuN-vHL9-aHKA-rBix-6eMyRU                
  └─sda5           crypto_LUKS 2              39ebf88d-40f7-4f65-98e6-f0c0eca648ba                  
    └─sda                                                                                           
machine--vg-swap_1 swap        1              8e863f14-8a08-4a60-a9d9-89b9e26a0e6f                  [SWAP]
└─sda5_crypt       LVM2_member LVM2 001       csKLdw-orf1-ZEuN-vHL9-aHKA-rBix-6eMyRU                
  └─sda5           crypto_LUKS 2              39ebf88d-40f7-4f65-98e6-f0c0eca648ba                  
    └─sda

Don't ask me why I didn't make use of all that space in the first place ...

So, what do you think is the best way to achieve that ?

I could try and extend machine--vg-root ...

Or maybe add another data partition next to the existing ones. This may be easier and less risky. I mainly need room for data anyway.

I'd like to make a backup too in case something goes wrong. What software would u recommend for this ?


Thanks for your help

Things look pretty good based on that. You might be in a lot more strife if you had to grow the crypt container - been there, done that.
LVM is designed for this sort of thing. If the space is unallocated simply grow the vg for the root, then the lv and filesystem. If the vg already has the space, simply do the lv/filesusyem. Piece of cake. Let's see the full output from these.
As for backup, there are hundreds of options. For a "one-off" like this I like fsarchiver - gives you a compressed verified backup for the entire filesystem as a point in time backup.

pvs
vgs
lvs

Originally Posted by alex_0 I could try and extend machine--vg-root ...

That's what I would do. lvextend -r extends both the volume and the filesystem, as long as this filesystem can be extended (ext4, xfs can).

Or maybe add another data partition next to the existing ones. This may be easier and less risky. I mainly need room for data anyway.

You mean another volume. Fine as well.

I'd like to make a backup too in case something goes wrong. What software would u recommend for this ?

tar is adequate here.
On second thought, no backup required when adding a volume.

Thanks a lot for your help

syg00's commands are very useful for a noob like me.

I think I'm gonna try benrdbausch's command. But I'm not quite sure for the back-up yet.

Maybe I'll go for tar or even dd. I like simple solutions. But I have to check the man pages first.

I'll let you know how it turns out ...