Perhaps this is more of a LXC issue than an LXD one. Let me know if I should ask over there instead.
I’m not quite sure which of the many limits I might be brushing up against here, or why the open files are not being released.
All I’ve done is mount a disk from my host into a VM and mapped my host user ID to the guest user ID:
$ lxc version
Client version: 5.21.2 LTS
Server version: 5.21.2 LTS
$ lxc config device add dev canonical disk source=/home/darndt/git/canonical/ path=/home/dev/canonical
$ lxc config set dev raw.idmap "both 1000 1002"
Then I’m trying to run this command (in the VM):
find "${HOME}/canonical" -name .git -prune
This works fine for a while, but eventually it fails with Too many open files.
After this, I can’t do anything on the mounted filesystem.
$ cd canonical
$ ls
ls: reading directory '.': Too many open files
I can still read/write outside of the mounted disk.
$ cd ..
$ ls
canonical Downloads snap vm-share
What I’ve tried
(In the VM):
lsof didn’t indicate anything weird (to my eyes). I didn’t see large amounts of files remaining opened by the find command.
ulimit -n 2048
sudo sysctl -w fs.inotify.max_user_instances=2048
and adding
dev hard nofile 65536
to the /etc/security/limits.conf file without any luck.
Maybe the limit is coming from the host, but in any case I can’t figure out:
- How to increase this limit
- How to ensure these open files are eventually released so that this doesn’t become some sort of “maximum amount of files ever opened” limit.
I’m not very familiar with LXD/LXC, but even nudging me in the right direction would help a lot.