On Wed, Feb 7, 2018 at 6:59 AM, Dan Pungă <[email protected]> wrote:
> Hello all!
> I've recently discovered and join this mailing list; hope I'm in the right
> place.
> I'm new to the OShift ecosystem, currently trying to develop a
> configuration to containerize some apps. I'm using minishift local cluster
> on a Ubuntu 16.04 machine (details below).
>
> I want to write a parametrized yaml template to configure the build
> process for my layers (those with a dockerStrategy) with using(or, better
> said connecting to ) the arguments defined in my Dockerfiles. I have found
> that OShift doesn't support ARG instructions prior to the FROM one when it
> reads the Dockerfile.
>
you sure even docker supports that? It's not working for me:
this works (just using an arg generically and echoing it out):
$ cat Dockerfile
FROM centos
ARG OS_name="centos"
RUN echo $OS_name
RUN exit 1
$ docker build --build-arg OS_name=centos .
Sending build context to Docker daemon 2.048 kB
Step 1/4 : FROM centos
---> ff426288ea90
Step 2/4 : ARG OS_name="centos"
---> Using cache
---> 59f6494cb002
Step 3/4 : RUN echo $OS_name
---> Running in 092e2600490e
*centos* ---> 8a3f570a033c
Removing intermediate container 092e2600490e
Step 4/4 : RUN exit 1
---> Running in 543cefc9eab8
The command '/bin/sh -c exit 1' returned a non-zero code: 1
This does not (not even referencing the arg in my FROM, just putting the
ARG before FROM):
$ cat Dockerfile
ARG OS_name="centos"
FROM centos
RUN echo $OS_name
RUN exit 1
$ docker build --build-arg OS_name=centos .
Sending build context to Docker daemon 2.048 kB
Step 1/4 : ARG OS_name="centos"
Please provide a source image with `from` prior to commit
So i think this is a docker restriction, not an openshift one.
So, even if a docker build would run successfully with something like:
>
> ARG OS_name="centos"
> ARG OS_version="6.8"
>
> FROM ${OS_name}:${OS_version}
> #....rest of Dockerfile instructions...
>
> if I try to define in my yaml config
> strategy:
> dockerStrategy:
> buildArgs:
> - name: OS_name
> value: "7"
>
> the build process does not work.
>
> Has anyone else come across this issue and how did you get around it? What
> I'm trying to achieve is single configuration structure for multiple
> versions, so I wouldn't have to write separate Docker configs for different
> app versions. For example building a Java JRE layer on top of different OSs
> with one file.
> Thank you,
> Dan
>
> PS: The closest thread regarding this issue that I've found in the archive
> is https://lists.openshift.redhat.com/openshift-archives/
> users/2017-January/msg00104.html
>
> Running env details:
>
> oc version
> oc v3.6.0+c4dd4cf
> kubernetes v1.6.1+5115d708d7
> features: Basic-Auth GSSAPI Kerberos SPNEGO
>
> Server https://192.168.99.100:8443
> openshift v3.6.0+c4dd4cf
> kubernetes v1.6.1+5115d708d7
> =========
>
> docker@minishift:~$ docker version
> Client:
> Version: 1.12.3
> API version: 1.24
> Go version: go1.6.3
> Git commit: 6b644ec
> Built: Wed Oct 26 23:26:11 2016
> OS/Arch: linux/amd64
>
> Server:
> Version: 1.12.3
> API version: 1.24
> Go version: go1.6.3
> Git commit: 6b644ec
> Built: Wed Oct 26 23:26:11 2016
> OS/Arch: linux/amd64
>
>
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>
>
--
Ben Parees | OpenShift
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