How to stop/start logstash service running in docker - docker

Question

I'm trying to figure out how logstash works/run inside docker, and I'm stuck with simple thing like starting and stoping logstash.
I have started logstash docker container with simple run
docker run -it --name l2 logstash
and with result:
[Api Webserver] INFO logstash.agent - Successfully started Logstash API endpoint {:port=>9600}
Next thing is runing /bin/bash with exec command, to get inside running container.
docker exec -it l2 /bin/bash
root#1b55d3a40d3f:/#
Listing services status, shows that there is no logstash service running.
Where can I find logstash service and stop/start?
root#1b55d3a40d3f:/# service --status-all
[ - ] bootlogs
[ - ] bootmisc.sh
[ - ] checkfs.sh
[ - ] checkroot-bootclean.sh
[ - ] checkroot.sh
[ - ] dbus
[ - ] hostname.sh
[ ? ] hwclock.sh
[ - ] killprocs
[ - ] motd
[ - ] mountall-bootclean.sh
[ - ] mountall.sh
[ - ] mountdevsubfs.sh
[ - ] mountkernfs.sh
[ - ] mountnfs-bootclean.sh
[ - ] mountnfs.sh
[ - ] procps
[ - ] rc.local
[ - ] rmnologin
[ - ] sendsigs
[ + ] udev
[ ? ] udev-finish
[ - ] umountfs
[ - ] umountnfs.sh
[ - ] umountroot
[ - ] urandom
[ - ] x11-common

Answer 1

The logstash in the container is not run as a system service, the entrypoint in the image will start a process and will keep the container up until this process ends or fails.
If you do a docker top l2 it will show the logstash process running (probaly alone) in the container.
To stop the logstash, you need to stop the container with docker stop l2, and later when you need to start it again you can run docker start l2, it will work as long you set the containers name as l2 when you create or first run it.
Docker Start help: https://docs.docker.com/engine/reference/commandline/start/
Docker stop help: https://docs.docker.com/engine/reference/commandline/stop/
Docker create: https://docs.docker.com/engine/reference/commandline/create/