Travis CI appears to use an Ubuntu Docker image for Debian:Stretch

I am seeing a strange behaviour where Travis CI uses Ubuntu images instead of Debian images…


$ docker run -it debian:stretch uname -a

Linux cca6aea0eebf 4.9.0-8-amd64 #1 SMP Debian 4.9.110-3+deb9u3 (2018-08-19) x86_64 GNU/Linux

On Travis CI:

$ docker run -it debian:stretch uname -a

Linux 50da2fcf2251 4.4.0-101-generic #124~14.04.1-Ubuntu SMP Fri Nov 10 19:05:36 UTC 2017 x86_64 GNU/Linux

Steps to reproduce:

Please note, I am using a node-js environment as my project runs cucumber-js tests against a Docker container.

Hi! When running a docker container, the kernel of the host system is being used. A docker container does not bring its own kernel. This is expected behavior.

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