# Defines the maximum number of inotify listeners.
# By default, this value is 128, which is quickly exhausted when using
# systemd-based LXC containers (15 containers are enough).
# When the limit is reached, systemd becomes mostly unusable, throwing
# "Too many open files" all around (both on the host and in containers).
# See https://kdecherf.com/blog/2015/09/12/systemd-and-the-fd-exhaustion/
# Increase the user inotify instance limit to allow for about
# 100 containers to run before the limit is hit again

# alias maxfdio='find /proc/*/fd/* -type l -lname anon_inode:inotify -print 2>/dev/null | cut -d/ -f3 |xargs -I {} -- ps --no-headers -o %U -p {} | sort | uniq -c | sort -nr'
# systemd and the "fd" exhaustion - too many files open (def.: 128)

fs.inotify.max_user_instances = 1024