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<== Date ==> <== Thread ==>

Subject: Re: How to run IOC in docker containers properly
From: Florian Feldbauer via Tech-talk <tech-talk at aps.anl.gov>
To: xiao zhang <zxinmyth at gmail.com>, tech-talk at aps.anl.gov
Date: Mon, 15 Jun 2020 10:12:30 +0200
Hey,

to the caveats:
1) I agree, entering the iocsh is not part of a normal workflow. We only enter the interactive shell of the container for debugging. In normal operation the shell is detached and not used. So there is not really an overhead. 2) I cannot confirm this behaviour. In our cases, when the ioc breaks the container exits. Which command are you using within you container? In our case the command which is started inside the container is simply `st.cmd`. So if the IOC breaks, the command of the container is finished and thus the container stops.

Best regards,
Florian

Am 15.06.2020 um 10:03 schrieb xiao zhang via Tech-talk:
Hi Florian

Thanks for sharing your experience. But I am not satisfied with the way it has to be.

As mentioned in my original post, the current method has 2 caveats:

1. Unnecessary overhead as entering the interactive shell of a running container is not part of a normal workflow
2. The container does not exit when the IOC process breaks

An iocsh-less way to start IOC solves both the above concerns as only `-d` option is required in this case. When the IOC process breaks, the container will exit immediately and tell the outer world that it is broken, so that a restart can be scheduled either manually or by an automatic container orchestrator.

--
Dr. Florian Feldbauer

Ruhr-Universität Bochum
Experimentalphysik I AG
Universitätsstr. 150
Fach-Nr. 125
D-44801 Bochum

Office: NB 2/134
Phone:  (+49)234 / 32-23563
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Re: How to run IOC in docker containers properly xiao zhang via Tech-talk
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Re: Re: How to run IOC in docker containers properly xiao zhang via Tech-talk

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