Add gitlab ci builds

.gitignore

@@ -5,6 +5,7 @@
 ## RPM Artifacts
 /*.git/
 /ccache*
+/build/
 /rpmbuild/
 *.tar*
 *.version

.gitlab-ci.yml

@@ -0,0 +1,20 @@
+stages:
+  - build
+
+variables:
+  DOCKER_IMAGE_BASE: registry.icinga.com/build-docker
+
+.build_job: &build_job
+  stage: build
+  tags:
+    - docker
+  image: ${DOCKER_IMAGE_BASE}/${CI_JOB_NAME}:x86_64
+  script:
+    - icinga-build-package
+  artifacts:
+    paths:
+      - build/*
+    expire_in: 1 week
+
+centos/7:
+  <<: *build_job