Raise NOFILE limits on host to 1048576

[curtishall]

Some Linux distributions (I'm looking at you Arch) change the limit of NOFILE to 65536 instead of the recommended (and default by Docker) 1048576

moby/moby@428d733

This causes some random problems, especially with rsyslog using 100% CPU

Latest Arch:

cat /proc/$(pgrep containerd | head -1)/limits | grep files
Max open files 65536 65536 files

[curtishall]

Something like this should help:

docker_no_file_limits {

current_value=$(cat /proc/$(pgrep containerd | head -1)/limits | grep files | awk '{print $4}')

Check if the current value is 65536

if [ "$current_value" -eq 65536 ]; then
# Run the command to update the Docker on the host
echo "[Service]
LimitNOFILE=1048576" > /etc/systemd/system/docker.service.d/override.conf

# Reload the systemd configuration
systemctl daemon-reload

# Restart the Docker service
systemctl restart docker

echo "Host NOFILE limit for Docker service configuration updated."

else
echo "Value is not 65536, skipping the command."
fi

}