moby/contrib/init/openrc/docker.initd

#!/sbin/openrc-run
# Copyright 1999-2013 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2

command="${DOCKERD_BINARY:-/usr/bin/dockerd}"
pidfile="${DOCKER_PIDFILE:-/run/${RC_SVCNAME}.pid}"
command_args="-p \"${pidfile}\" ${DOCKER_OPTS}"
DOCKER_LOGFILE="${DOCKER_LOGFILE:-/var/log/${RC_SVCNAME}.log}"
DOCKER_ERRFILE="${DOCKER_ERRFILE:-${DOCKER_LOGFILE}}"
DOCKER_OUTFILE="${DOCKER_OUTFILE:-${DOCKER_LOGFILE}}"
start_stop_daemon_args="--background \
	--stderr \"${DOCKER_ERRFILE}\" --stdout \"${DOCKER_OUTFILE}\""

start_pre() {
	checkpath -f -m 0644 -o root:docker "$DOCKER_LOGFILE"

	ulimit -n 1048576

	# Having non-zero limits causes performance problems due to accounting overhead
	# in the kernel. We recommend using cgroups to do container-local accounting.
	ulimit -u unlimited

	return 0
}