Problems with run docker image about pinba_engine HOT 4 OPEN

I had two issues with the Docker image, maybe you have some of them:

1. It need's at least 2GB of RAM. I was trying on a micro instance in AWS (1GB), so OOM killer would kill my instance.

2. I had MySQL running on my docker host, so the 3306 port was already bound by another process.

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Free mem: 10GB

Linux ln 4.10.0-35-generic #39~16.04.1-Ubuntu SMP Wed Sep 13 09:02:42 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux

Docker version 17.06.2-ce, build cec0b72

i not have mysql working on localhost.

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@yapro
Confirm this message #53 (comment)
On my test machine, it was also necessary to add a swap file of at least 2 GB, because after launching the pinba, the free space in the swap decreased by 1.5GB.
And yes, when other process bound ports 3306 or 30002 pinba won't start.

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About the issue with other processes occupying ports 3306 or 30002: it is relatively easy to add a -p switch to the command line used to start the Pinba container, so that the ports it listens to get mapped to different ports on the host. I agree this could be documented somewhere a bit better.

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