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MQSeries.net Forum IndexIBM MQ Installation/Configuration Supportauto start of MQ in Docker container not working

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pcelari
PostPosted: Thu Feb 16, 2017 10:21 pm Post subject: auto start of MQ in Docker container not working Reply with quote

Partisan

Joined: 31 Mar 2006
Posts: 336
Location: New York

Hello,

while experimenting MQ in docker container, generally successful, I have been unable to get the QMGR start upon start of the container.

With a qmgr QMGR setup in the docker image with listener at port 1414, the qmgr simply will not start despite I instructed the Dockerfile to start the qmgr with the following instructions:

FROM mq:9.0
CMD /opt/mqm/bin/strmqm QMGR

or

CMD ["/opt/mqm/bin/strmqm QMGR"]

or

CMD ["/opt/mqm/bin/strmqm", "QMGR"]

But none of the above works - the qmgr is not not running upon start of the container. So, I'm really lost! Has anyone been successful in getting the qmgr running at start of a container?

Any insight would be greatly appreciated.

-p
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pcelari
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fjb_saper
PostPosted: Fri Feb 17, 2017 12:14 am Post subject: Reply with quote

Grand Poobah

Joined: 18 Nov 2003
Posts: 19826
Location: LI,NY

you did not specify which version of MQ...
What if you source the MQ environment in your script before running the start queue manager command ?. What is the userid you are trying to run this script under?
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mqjeff
PostPosted: Fri Feb 17, 2017 4:36 am Post subject: Reply with quote

Grand Master

Joined: 25 Jun 2008
Posts: 17447

fjb_saper wrote:
you did not specify which version of MQ...

pcelari wrote:
FROM mq:9.0

fjb_saper wrote:
What if you source the MQ environment in your script before running the start queue manager command ?.


I don't know if the mq:9 docker image already does this,but it doesn't hurt to put
Code:
RUN[". /opt/mqm/bin/setmqenv <setmqinst options>"]

before your CMD
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pcelari
PostPosted: Fri Feb 17, 2017 9:21 pm Post subject: Reply with quote

Partisan

Joined: 31 Mar 2006
Posts: 336
Location: New York

thanks for the input!

The way I build the base image mq:9.0 was by manually installing MQ v9 inside a running Ubuntu container, performing the sourcing, create the gm QMGR. I then then commit the container into the image mq:9.0

when the base container mq:9.0 starts, the qm QMGR can be started manually with the normal command "strmqm QMGR". so the sourcing step is already complete.

QMGR starts fine if I run the strmqm command manually by either mqm or root

The build command output says "successfully build". Just the QMGR doesn't start upon container start. Since there seems to be no error from MQ side, there isn't any entry indicating any cause.
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mqjeff
PostPosted: Mon Feb 20, 2017 4:48 am Post subject: Reply with quote

Grand Master

Joined: 25 Jun 2008
Posts: 17447

Change your CMD to an ENTRYPOINT ?
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dextermbmq
PostPosted: Tue Oct 16, 2018 4:29 am Post subject: Reply with quote

Apprentice

Joined: 26 Jul 2014
Posts: 49

Updating a old thread.

I was doing the same in Ubuntu container with similar approach. Create a container from Ubuntu image -->Install IBM MQ and create a queue manager --->Commit the container to create a new Image.

Achieving a scenario where the Queue Manager is automatically started can be achieved by pointing ENTRYPOINT to a shell script that starts the queue manager or configures it in whatever way needed.

Dockerfile
----------------------
From <IMAGE>
COPY *.sh /usr/local/bin
COPY *.mqsc /usr/local/bin
RUN chmod +x /usr/local/bin/*.sh
RUN chmod +x /usr/local/bin/*.mqsc
RUN usermod -a -G mqm root
ENTRYPOINT ["/usr/local/bin/mq.sh"]

mq.sh
------------
#!/bin/bash
set -e
strmqm TEST
runmqsc TEST < /usr/local/bin/createmqobj.mqsc
exec "$@"

I have to add the root to mqm group in order to enable the queue manager start else it will give authorization error
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gbaddeley
PostPosted: Tue Oct 16, 2018 4:07 pm Post subject: Reply with quote

Padawan

Joined: 25 Mar 2003
Posts: 1909
Location: Melbourne, Australia

Quote:
I have to add the root to mqm group in order to enable the queue manager start else it will give authorization error

root should never be in the mqm group. This can cause issues if root starts a qmgr.
To run strmqm from root, use su - mqm -c strmqm .....
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dextermbmq
PostPosted: Sat Oct 20, 2018 8:34 am Post subject: Reply with quote

Apprentice

Joined: 26 Jul 2014
Posts: 49

Thanks for correcting me. I agree that root should never be a part of mqm.

Moreover, in all ideal scenarios we should not even run the container with root user. It should be something like :

Run the container with a non root user--->Configure the ENTRYPOINT script to execute the MQ specific commands with mqm user.
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dextermbmq
PostPosted: Fri Nov 09, 2018 7:27 am Post subject: Reply with quote

Apprentice

Joined: 26 Jul 2014
Posts: 49

Hi Guys,

To clarify, does anyone know if its mandatory for us to use the IBM Provided dockerfiles and related scripts for MQ image creation (process given by IBM here : https://github.com/ibm-messaging/mq-container). Does IBM provide support only to those MQ Images created with this approach ? OR we can have an MQ image using the procedure being followed in this thread and still get support from IBM for any runtime issues with MQ.

Just getting a feel that the process explained in the link https://github.com/ibm-messaging/mq-container may not be easy for someone with less scripting knowledge.
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