how to install openrc in docker-alpine?

[snowdream]

i want to install openrc in docker-alpine and run frpc as service.

/run/openrc # rc-service frpc start
/lib/rc/sh/openrc-run.sh: line 101: can't create /sys/fs/cgroup/blkio/tasks: Read-only file system
/lib/rc/sh/openrc-run.sh: line 101: can't create /sys/fs/cgroup/cpu/tasks: Read-only file system
/lib/rc/sh/openrc-run.sh: line 101: can't create /sys/fs/cgroup/cpuacct/tasks: Read-only file system
/lib/rc/sh/openrc-run.sh: line 101: can't create /sys/fs/cgroup/cpuset/tasks: Read-only file system
/lib/rc/sh/openrc-run.sh: line 101: can't create /sys/fs/cgroup/devices/tasks: Read-only file system
/lib/rc/sh/openrc-run.sh: line 101: can't create /sys/fs/cgroup/freezer/tasks: Read-only file system
/lib/rc/sh/openrc-run.sh: line 101: can't create /sys/fs/cgroup/hugetlb/tasks: Read-only file system
/lib/rc/sh/openrc-run.sh: line 101: can't create /sys/fs/cgroup/memory/tasks: Read-only file system
/lib/rc/sh/openrc-run.sh: line 101: can't create /sys/fs/cgroup/net_cls/tasks: Read-only file system
/lib/rc/sh/openrc-run.sh: line 101: can't create /sys/fs/cgroup/net_prio/tasks: Read-only file system
/lib/rc/sh/openrc-run.sh: line 101: can't create /sys/fs/cgroup/perf_event/tasks: Read-only file system
/lib/rc/sh/openrc-run.sh: line 101: can't create /sys/fs/cgroup/pids/tasks: Read-only file system
/lib/rc/sh/openrc-run.sh: line 101: can't create /sys/fs/cgroup/systemd/tasks: Read-only file system
 * You are attempting to run an openrc service on a
 * system which openrc did not boot.
 * You may be inside a chroot or you may have used
 * another initialization system to boot this system.
 * In this situation, you will get unpredictable results!
 * If you really want to do this, issue the following command:
 * touch /run/openrc/softlevel
 * ERROR: networking failed to start
 * ERROR: cannot start frpc as networking would not start

frpc service:

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

pidfile="/run/frpc.pid"
configfile="/etc/frp/frpc.ini"
command="/usr/bin/frpc"
command_opts=" -c $configfile"

depend() {
    need net
    need localmount
}

start() {
    ebegin "Starting frpc"
    start-stop-daemon --start --background \
    --exec $command \
    -- $command_opts \
    --make-pidfile --pidfile $pidfile
    eend $?
}

stop() {
    ebegin "Stopping frpc"
    start-stop-daemon --stop \
    --exec $command \
    --pidfile $pidfile
    eend $?
}

reload() {
    ebegin "Reloading frpc"
    start-stop-daemon --exec $command \
    --pidfile $pidfile \
    -s 1
    eend $?
}

[snowdream]

gliderlabs/docker-alpine#437

[ncopa]

You normally dont run openrc in a docker container.

If you only need to know how to install it: apk add openrc.

If you intend to run it in docker conatiner, then this comment may be helpful: gliderlabs/docker-alpine#437 (comment)

In either case, this is not an issue that we (alpine) can fix in the docker image.

[urbantom]

Guys, isn't this: Setting up a ssh-server your wiki? If it is, how can you say normally don't run openrc in a docker container?

[domibay-hugo]

I found I cannot enable Secondary Services at Build Time

RUN rc-update add rsyslog default\
  && mkdir /run/openrc\
  && touch /run/openrc/softlevel\
  && rc-service rsyslog start

Just to run rc-service <secondary_service> start does not work!

So I figured out this Workaround
Secondary Services Workaround