DNS SRV records no longer work in Docker 1.12 containers when using a container overlay network, known bug?

neatwhiskey10101100 · August 23, 2016, 2:08pm

We’ve been trying to find any log messages we can about this issue but it appears to be an internal Docker bug.

When we upgraded our Docker hosts to 1.12, containers on a Docker 1.12 host are no longer able to query SRV records.

Has anyone else seen this issue?

Info dump -

http://pastebin.com/raw/ygve296F

/** 1.11.2 - SRV records work - **/

    root@ct1-docker-1:/# docker info
    Containers: 12
     Running: 12
     Paused: 0
     Stopped: 0
    Images: 12
    Server Version: 1.11.2
    Storage Driver: zfs

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I found this Github issue that I think may be related

sanimej · September 1, 2016, 6:50pm

There was an issue in 1.12 in handling SRV queries. It has been fixed in 1.12.1

-Santhosh.