[atomic-devel] Problems with labels

[Václav Pavlín <vpavlin redhat com>]

Hello,

I wanted to use CentOS Atomic Host and Docker images to package 
atomicapp-run [1] into an image but I ran into troubles with docker and 
docker-py (probably).

See http://fpaste.org/217373/30426738/

There is f.e. ${CONFDIR} specified in LABEL INSTALL, but it disappears 
during docker build. I "fixed" this with adding a backslash in front of 
dollar sign (\${CONFDIR}) so it persisted after the build. But when I ran

atomic install vpavlin/atomicapp-run

I got this incorrect cmd again:

docker run --rm -it --privileged -v /run:/run -v :/atomicapp -v /:/host 
-v /answers.conf:/application-entity/answers.conf -e 
IMAGE=vpavlin/wp-app -e NAME=wp-app --name wp-app vpavlin/wp-app 
containerapp -v install --update --path /atomicapp /application-entity

This works completely fine on RHELAH, but there is a different docker 
verison:

RHELAH:
bash-4.2# docker --version
Docker version 1.5.0-dev, build fc0329b/1.5.0

CentOS AH:
bash-4.2# docker --version
Docker version 1.6.0, build bdbc177

So my guess it that docker somehow ignores/evaluates variables in LABELS 
in 1.6.0...and even if they persist with the backslash fix, they get 
lost by inspect() from docker-py used in atomic tool.

Any thoughts if this is intended or how to fix it/workaround it?

Thanks,
Vašek


[1] https://github.com/vpavlin/atomicapp-run/blob/master/Dockerfile.centos

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