Lxc file push/pull - no such file or directory

LXD
1

Hi all,

i have problem with lxc file push/pull functionality. When try push/pull file i get below error:

lxc fiile push somefilename container/dir/
Error: open /tmp/lxd_forkputfile_244537034: no such file or directory

The problem is weird because:

  • when i restart whole machine pull/push work
  • after some weeks it stop work again.
  • i have this issue 3 weeks ago also, but i dont take it seriously … i upgrade lxd, os, restart machine and forgot.
  • but it appear again.

I cannot always restart whole node due lot of services running there.
So now i want to find root cause of this problem. I will be grateful for any suggestion how to take to bottom of it.

My actual setup is:

driver: lxc
driver_version: 4.0.4
kernel_architecture: x86_64
kernel_version: 5.8.14-1-default
os_name: openSUSE Tumbleweed
os_version: “20201019”
server_version: “4.7”
storage: btrfs
storage_version: 4.15.1

2

Does it work if you specify somefilename using its absolute path?

3

It doesnt work,
When i use absolute file path the result is with the same error.

4

And you’re running the LXD via snap package?

5

yes, its running via snap.

6

This happens when you run something on your host which cleans up /tmp deleting the /tmp/snap.lxd directory

This effectively breaks /tmp inside the snap for good until the entire namespace is re-created on reboot.

So look for some kind of /tmp cleaning logic on your system, that’ll be the culprit.

2 Likes
7

You are right the directory /tmp/snap.lxd doesnt exists on the hosts.

Interesting is that its on 3 nodes, on one node is okay … all have identical configuration also uptime.

I will try findout if there is some cleaning job. Thank you for direction.

8

Yeah, i have configured automaticaly cleanup /tmp dir every 10d.

So solutions are:

  • disable cleanup /tmp by creating file /etc/tmpfiles.d/fs-tmp.conf with content:
    q /tmp 1777 root root

  • let enabled /tmp cleaunup but prevend remove snap.lxd dir creating file /etc/tmpfiles.d/fs-tmp.conf with content:
    q /tmp 1777 root root 10d
    r! /tmp/snap.lxd

Many thanks for help.

1 Like
9

for the people ending up here from search engines:

this directory has been renamed recently to /tmp/snap-private-tmp/snap.lxd so the line is now

r! /tmp/snap-private-tmp