[olug] Docker + xinetd??

[Jay Bendon]

generally, you don't need a process manager for docker since docker can
restart on process termination.  If you want to pass stdin maybe do it via
a file?

Otherwise i've had lots of success using supervisord.

Also you're using entry point wrong.  Entry point should be a shell script
that takes "arguments" and runs them

# Entrypoint.sh
#!/bin/bash

echo "do some setup"
exec "$@"


####
You're really looking for is CMD which is passed into ENTRYPOINT
CMD ["xinetd", "-f", "/etc/xinetd.conf", "-dontfork", "-inetd_compat"]

--Jay

On Mon, Jun 18, 2018 at 10:52 AM, Chad Homan <choman at gmail.com> wrote:

> try taking a look at tini (google docker tini)
>
> I've heard of another (I think dumb-init)
>
> good luck
>
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> Chad
>
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>
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>
> On Mon, Jun 18, 2018 at 10:26 AM, Justin Reiners <justin at hotlinesinc.com>
> wrote:
>
> > It didn't hang until I add xinetd into the mix.
> >
> >
> >
> > On Mon, Jun 18, 2018, 9:56 AM Rob Townley <rob.townley at gmail.com> wrote:
> >
> > > Have you tried taking out the inetd part and seeing if it still hangs?
> > >
> > > On Mon, Jun 18, 2018 at 9:37 AM Justin Reiners <justin at hotlinesinc.com
> >
> > > wrote:
> > >
> > > > Sorry to bother, maybe someone here knows.
> > > >
> > > > Has only had luck running xinetd within docker? I've got some older
> > > legacy
> > > > stuff written in python, which takes input on stdin I use xinetd to
> > > > operate. I've been trying and failing for about 2 days now...
> > > >
> > > > I appreciate any ideas on why the entry point doesn't seem to work,
> the
> > > > docker instance seems to hang.
> > > >
> > > > Searching for "xinetd + docker" seems to be a lost cause.
> > > >
> > > >
> > > > *Dockerfile:*
> > > > From centos
> > > > RUN yum -y update
> > > > RUN yum -y install wget vim tar epel-release git nc xinetd tree
> libcurl
> > > > curl gcc-devel && yum -y install  python34 python34-mysql
> > python34-devel
> > > > python34-pip openssl-devel libssl-devel && yum groupinstall -y
> > > "Development
> > > > Tools"
> > > > RUN mkdir -p /app/bin && cd /app/bin
> > > > COPY robocall.txt /etc/xinetd.d/robocall
> > > > ENV PATH=$PATH:/app/bin/
> > > > ENV GOOGLE_APPLICATIONS_CREDENTIALS=/app/bin/json.key
> > > > COPY * /app/bin/
> > > > RUN python3 -m pip install -r /app/bin/req2.txt
> > > >
> > > > ENTRYPOINT xinetd -f /etc/xinetd.conf -dontfork -inetd_compat
> > > >
> > > >
> > > >
> > > > *docker-compose.yml*:
> > > > version: '2.2'
> > > >
> > > > services:
> > > >
> > > >   robocaller:
> > > >     build: .
> > > >     restart: always
> > > >     privileged: True
> > > >     ports:
> > > >             - 2001:2001
> > > >
> > > >
> > > > xinetd service file:
> > > >
> > > > service robocall
> > > > {
> > > >         disable         = no
> > > >         port            = 2001
> > > >         flags           = REUSE
> > > >         socket_type     = stream
> > > >         protocol        = tcp
> > > >         wait            = no
> > > >         user            = root
> > > >         server          = python3 /app/bin/robocall.py
> > > > }
> > > >
> > > >
> > > > [09:34 root at server .../compose_files/robocaller (master *+%)]#
> > > > docker-compose up
> > > > Starting robocaller_robocaller_1 ...
> > > > Starting robocaller_robocaller_1 ... done
> > > > Attaching to robocaller_robocaller_1
> > > > (hangs here)
> > > >
> > > >
> > > > logs:
> > > > [09:35 root at server .../compose_files/robocaller (master *+%)]#
> docker
> > > logs
> > > > robocaller_robocaller_1
> > > >
> > > > (none)
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