Index: docker-20.10.4/contrib/init/sysvinit-redhat/docker
===================================================================
--- docker-20.10.4.orig/contrib/init/sysvinit-redhat/docker
+++ docker-20.10.4/contrib/init/sysvinit-redhat/docker
@@ -32,6 +32,8 @@ logfile="/var/log/$prog"
 [ -e /etc/sysconfig/$prog ] && . /etc/sysconfig/$prog
 [ -e /etc/sysconfig/${prog}-storage ] && . /etc/sysconfig/${prog}-storage
 
+[ -n "${DAEMON_MAXFILES}" ] && ulimit -n "${DAEMON_MAXFILES}"
+
 # Additional start options for the Docker daemon can
 # be defined in the $OPTIONS variable in /etc/sysconfig/docker,
 # which is also the variable name referenced by the systemd unit.