Why does lsblk on LXC container show full host disk size?
reddit / selfhosted

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sano_banano · 2023-11-09 23:03

How is it possible that "lsblk" command ran on LXC container shows the
full host disk size?

Shouldn't it be the size I've chosen when creating the container (8
GB)?

I know I'm probably missing something, but even after Googling I can't
find an answer.

Thank you!

https://preview.redd.it/k4wfk2evkezb1.png?width=371&format=png&auto=we
bp&s=e6e9d9ea23dbcca529f45f1142763388108f9660

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C0rn3j · 2023-11-09 23:59

You asked it to list block devices, it did so accurately.

`df -h` could be more representative of what you want if you're
looking to check file size, depending on the file system used.

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Former-Hotel9791 · 2023-11-10 01:11

Check /etc/fstab i think you are in Read only

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thekrautboy · 2023-11-10 01:20

Why would read-only make any difference to the reported size? *smh*

/u/C0rn3j already provided the correct answer.

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suinkka · 2023-11-10 01:55

Here's a thread from LXD's forums about the same thing:

https://discuss.linuxcontainers.org/t/how-to-hide-of-host-root-device-
from-container-lsblk/6103

In essence, the kernel doesn't provide a way to isolate block devices
(like a namespace)

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ithakaa · 2023-11-10 03:19

SMH isn’t going to foster much help if you can’t be civil

If you take that attitude you may find yourself on your own.

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thekrautboy · 2023-11-10 03:23

Oh no!

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ithakaa · 2023-11-10 03:24

Why bother even posting for help?