[OpenWrt-Devel] [RFC] additional Docker images and CI testing

[Paul Spooren]

Hi all,

currently OpenWrt only offers a very basic Docker image[0] for testing
of the packages.git repo. The image is not directly usable as the CI
does most of the work, like setting up the SDK and adding feeds[1]. I'd
like to propose two additional images and added CI test examples for
illustration, `openwrt` and `openwrt-sdk`

## openwrt:x86-64

Now that OpenWrt can run within Docker containers[2] (thanks @mikma,
@dangowrt and @ynezz) it's possible for local or CI tests:

* Running the image locally:

    docker run --rm -it aparcar/openwrt:x86-64

* Test example via CircleCI

Checks if procd starts basic services[3].

The container image is created via a config.yml similar to the one from
packages.git[4].

## openwrt-sdk:x86-64

The OpenWrt SDK in a Docker container, also usable for local building or CI:

* Using the SDK locally

    docker run --rm -v ./bin/:/sdk/bin -it aparcar/openwrt-sdk:x86-64
    # within the Docker container
    ./scripts/feeds update base
    make defconfig
    ./scripts/feeds install firewall
    make package/firewall/{clean,compile} -j$(nproc)

The compiled output is found in ./bin/

* Test example via CircleCI

Compiles firewall package[5].

The openwrt-sdk container image is also created via CI[6].

All examples are based on this[7] repo and the *interesting* branches are:

* openwrt
* openwrt-test
* openwrt-sdk
* openwrt-sdk-test

I'd be happy if OpenWrt offers OS, SDK and ImageBuilder container images
in the future. Currently only the x86/64 target is supported, however
it'd be easy to support all (popular) targets via tags.

Eventually we could use this to develop test cases for OpenWrt specific
tools like netifd, procd, ubus, firewall3, etc...

Best,
Paul

[0]: https://hub.docker.com/r/openwrtorg/packages-cci
[1]:
https://git.openwrt.org/?p=feed/packages.git;a=blob;f=.circleci/config.yml;h=02a87146d91f19638bfbfc1fbc46913256cf358d;hb=refs/heads/master
[2]:
https://git.openwrt.org/?p=openwrt/openwrt.git;a=commit;h=6a92eb5b382860017fd00cd05350a648c4a4ac56
[3]: https://circleci.com/gh/aparcar/openwrt-ci-test/53#config/containers/0
[4]: https://circleci.com/gh/aparcar/openwrt-ci-test/41#config/containers/0
[5]: https://circleci.com/gh/aparcar/openwrt-ci-test/45#config/containers/0
[6]: https://circleci.com/gh/aparcar/openwrt-ci-test/46#config/containers/0
[7]: https://github.com/aparcar/openwrt-ci-test



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