openSUSE Conference 2017 - The Docker at Travis Presentation
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Ladislav Slezák YaST Developer [email protected] Docker at Travis There is no excuse for NOT using a CI
Transcript of openSUSE Conference 2017 - The Docker at Travis Presentation
Why Travis?
Travis – Introduction
● CI as a service (hosted)● Free for open source projects● Integrated with GitHub
Travis
● Builds run in Ubuntu 12.04 (Precise) or 14.04 (Trusty) VM● 12.04 is discontinued, even 14.04 is pretty old● What if you need a newer compiler, libraries?● What if you need a completely different distro?● Local/remote debugging not possible
Why Docker?
Docker
● Works out of box at Travis● Container based, no virtualization● Lightweight (minimal overhead)● Many base OS images available● Easy to build and publish your own images
Example1: Snapper
Snapper
● A tool for managing file system snapshots● Portable, built for many distributions in OBS● Single Git source repository● Changed less frequently
Snapper – Travis Implementation
● Separate Dockerfile (defines the Docker image) and build script for each target distribution
● The Docker images are built at Travis– Easier to maintain
– Takes some more time
● The targets are built in parallel at Travis
Example2: YaST
YaST
● Not portable, (open)SUSE specific● Does not work in other distributions● Modular design● 100+ Git source repositories● Bigger development team, frequent changes
YaST – Old Ubuntu Setup
● Build YaST packages for Ubuntu 12.04 in OBS– Not a full port! Just enough for running unit tests
(system access is simulated)
● Extra work, hard to maintain● Not reliable (false positives or uncaught issues)● Limited scope for tests (cannot build RPM easily)
YaST – New Docker Setup
● Pre-built Docker images at Docker Hub– Faster (only built once)
– Two images for Ruby or C++ packages
– The Travis script is included (shared)
Docker at Travis – Summary
● Less maintenace● More reliable builds
– Using the real target distribution
● Easier debugging– Use the same Docker image locally
● Independent on Travis default OS– Ubuntu 12.04 will be dropped soon (switch to 14.04)
Questions?
Links
● https://blog.ladslezak.cz/2017/03/28/docker_at_travis/● https://travis-ci.org/● https://docs.travis-ci.com/user/docker/● https://docs.docker.com/● https://github.com/openSUSE/snapper/blob/master/README.Travis.md● https://yastgithubio.readthedocs.io/en/latest/travis-integration/● https://github.com/yast/docker-yast-ruby● https://hub.docker.com/r/yastdevel/ruby/
Thank You!
Join Us at www.opensuse.org
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