Hi, I'm trying to compose the simplest possible docker master image that runs buildbot start in ENTRYPOINT/CMD. I've tried to use a lot of combinations of 'dumb-init', 'gosu' and 'exec', but with no success. The situation is as follows: 1) When I try to run deamonized buildroot with the command 'docker run -d -v $local/vol/bldbot/master:/var/lib/buildbot buildbot-master-test ', the container starts successfully, but is is terminated abruptly. The log looks as follows:
[timestamp] [-] Log opened. [timestamp] [-] twistd 16.0.0 (/usr/bin/python 2.7.12) starting up. [timestamp] [-] reactor class: twisted.internet.epollreactor.EPollReactor. [timestamp] [-] Starting BuildMaster -- buildbot.version: 0.9.2 [timestamp] [-] Loading configuration from '/var/lib/buildbot/master.cfg' [timestamp] [-] Setting up database with URL 'sqlite:/state.sqlite' [timestamp] [-] setting database journal mode to 'wal' [timestamp] [-] doing housekeeping for master 1 c8aa8b0d5ca3:/var/lib/buildbot [timestamp] [-] adding 1 new changesources, removing 0 [timestamp] [-] adding 1 new builders, removing 0 [timestamp] [-] adding 2 new schedulers, removing 0 [timestamp] [-] No web server configured on this master [timestamp] [-] adding 1 new workers, removing 0 [timestamp] [-] PBServerFactory starting on 9989 [timestamp] [-] Starting factory <twisted.spread.pb.PBServerFactory instance at 0x7f2cca079b00> [timestamp] [-] BuildMaster is running 2) When I run the container in the interactive mode with the command 'docker run --rm -it -v $local/vol/bldbot/master:/var/lib/buildbot buildbot-master-test /bin/sh' and next I run the command 'buildbot start' all works like charm. I've already studied the content of official buildbot master docker image, tj. 'buildbot/buildbot-master'. I see that authors decided to use the command 'exec twistd -ny $B/buildbot.tac' in start_buildbot.sh. So the question is, how to compose the ENTRYPOINT/CMD instructions in the Dockerfile that runs simply buildbot start. See also discussion and further details on Stack Overflow <http://stackoverflow.com/questions/41299608/daemonized-buildbot-start>
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