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As described in Qubes forum post (https://forum.qubes-os.org/t/insufficient-free-space-when-upgrading-to-qubes-4-1/13995) I tried to remove two vms, but it didn't help.
How can I shrink one of my logical volumes?
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[user@dom0 ~]$ sudo vgdisplay
--- Volume group ---
VG Name qubes_dom0
System ID
Format lvm2 Metadata Areas 1 Metadata Sequence No 27203 VG Access read/write VG Status resizable MAX LV 0 Cur LV 118 Open LV 20 Max PV 0 Cur PV 1 Act PV 1 VG Size 237.47 GiB PE Size 4.00 MiB Total PE 60792 Alloc PE / Size 60792 / 237.47 GiB Free PE / Size 0 / 0
Format lvm2 Metadata Areas 1 Metadata Sequence No 27203 VG Access read/write VG Status resizable MAX LV 0 Cur LV 118 Open LV 20 Max PV 0 Cur PV 1 Act PV 1 VG Size 237.47 GiB PE Size 4.00 MiB Total PE 60792 Alloc PE / Size 60792 / 237.47 GiB Free PE / Size 0 / 0
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The line
Free PE / Size 0 / 0
Is what I'm talking about. You need that to be at least 40GB.
When you're deleting the VMs, you're leaving the LVs sitting there sucking up your logical space. VG is comprised of PVs, and LVs are taken from VGs. Let me know what
lvdisplay says and tell me which of them should have been deleted and I can help you delete them.reply
Interesting. That seems lame that deleting VM doesn't free up the logical space.
lvdisplay shows many logical volumes, for instance, this one is associated with already deleted VM:--- Logical volume ---
LV Path /dev/qubes_dom0/vm-whonix-gw-15-root.tick
LV Name vm-whonix-gw-15-root.tick
VG Name qubes_dom0
LV UUID o2ftaB-vIuC-FVoc-C6XS-1U24-2rJQ-2ZkENz
LV Write Access read only
LV Creation host, time dom0, 2020-06-05 13:27:13 -0400
LV Pool name pool00
LV Status available
# open 0
LV Size 10.00 GiB
Mapped size 23.48%
Current LE 2560
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:40
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Also, Is there any documentation explaining how this stuff works?
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There is also some talk of using lvremove on the qubes documentation
How do I free a logical volume up?
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Assuming that is the volume you want to remove, and the partition isn't mounted or being used by a domU, execute this command for each one that doesent belong.
lvremove /dev/qubes_dom0/vm-whonix-gw-15-root.tickreply
Thank you!
I removed 6 logical volumes (using
sudo lvremove command; volumes from already deleted VMs/domains). However, sudo vgdisplay still shows 0 Free PE.I removed a couple of other VMs but the Free PE is still 0.
$ sudo vgdisplay
--- Volume group ---
VG Name qubes_dom0
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No 27755
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 82
Open LV 14
Max PV 0
Cur PV 1
Act PV 1
VG Size 237.47 GiB
PE Size 4.00 MiB
Total PE 60792
Alloc PE / Size 60792 / 237.47 GiB
Free PE / Size 0 / 0
VG UUID 007hBk-o2Kx-OdMy-970q-g5v7-mWxc-lMi29y
In the Qubes UI (top right corner), clicking the disk icon, it shows 46.8% disk usage (it was over 50% before I removed these VMs).
I used
sudo lvremove to delete 6 logical volumes (from already deleted VMs), but sudo vgdisplay still says 0 Free PE. Any more ideas? I'm gonna backup my data and delete more VMs in the meantime...xen uses partitions for its domUs, just like Linux needs partitions on your drive. When you delete a domU, you are only 'killing' the machine. LVM let's you dynamically create and delete arbitrary partitions without needing to rearrange your disk partition table. When you run the domU creation script, it creates a partition (aka volume) for you based on how large you told it to make the VM drive. When you "delete" a domU you aren't really deleting anything, only killing the process. The volume stays there, and you could mount it manually from dom0 in case there's something on there you need.
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I think I actually need this. One large VM (~30GB) doesn't boot (can't start terminal or anything), but before I delete it, I want to backup some stuff, so it would be great if I could mount that volume from dom0 manually, right?
$ sudo mount /dev/qubes_dom0/vm-crowphale-private-snap crow-mount
mount: wrong fs type, bad option, bad superblock on /dev/mapper/qubes_dom0-vm--crowphale--private--snap,
missing codepage or helper program, or other error
In some cases useful info is found in syslog - try
dmesg | tail or so.
Any pointers how to do this?
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vgdisplayon dom0, I'll bet you dont have any free extents. Your upgrade is trying to take a LVM snapshot but there aren't any available extents (multi-megabyte LVM blocks) in your volume group to allow COW on the running domU LV. You essentially need to shrink (or delete) one of your logical volumes (lvresize) (shrink the contained filesystem before you shrink the LV) to free up some extents in your VG to allow LVM to do a COW snapshot during the hot upgrade.