GitLab CI should be able to replace Jenkins. Obviously, it doesn't have the maturity of Jenkins or the plugin ecosystem, but it's flexible runner system, easy c

GitLab CI should be able to replace Jenkins. Obviously, it doesn't have the maturity of Jenkins or the plugin ecosystem, but it's flexible runner system, easy configuration with .gitlab-ci.yml and integration with GitLab make it quite powerful. You can already have multiple, parallel builds, builds on success/failure, trigger builds and thus create pipelines. We don't support build artifacts yet, but you can circumvent this by using something like S3 for output. We'll add this in the future as well. GitLab should run just fine on Raspberry Pi 2. Do you have any data on slow down?