Docker multistage build

.dockerignore

@@ -0,0 +1,22 @@
+.git
+.vscode
+
+charts
+deployments
+docs
+examples
+
+.gitignore
+.travis.yml
+coverage.txt
+glide.*
+README.md
+
+# ignore compiled files
+debug
+test/e2e/e2e.test
+workflow-controller
+
+# ignore vendor tests
+vendor/*/*/test
+vendor/*/*/*/test

.travis.yml

@@ -3,6 +3,10 @@ os: linux
 sudo: required
 services:
   - docker
+addons:
+  apt:
+    packages:
+      - docker-ce
 go:
   - 1.8.3
 go_import_path: github.com/sdminonne/workflow-controller
@@ -18,8 +22,7 @@ install:
   - helm init --service-account tiller
 
 script:
-  - make build
-  - make test
+  - make container_test
   - make container
   - helm install --version latest -n end2end-test charts/workflow-controller
   - while [ $(kubectl get pod --selector=app=workflow-controller | grep 'workflow-controller' | awk '{print $3}') != "Running" ]; do echo "$(kubectl get pod --selector=app=workflow-controller)"; sleep 5; done

Dockerfile

@@ -11,8 +11,39 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
+#
+# ----- Go Dev Image ------
+#
+FROM golang:1.9 AS godev
+
+# set working directory
+RUN mkdir -p /go/src/github.com/sdminonne/workflow-controller
+WORKDIR /go/src/github.com/sdminonne/workflow-controller
+
+# copy sources
+COPY . .
+
+#
+# ------ Go Test Runner ------
+#
+FROM godev AS tester
 
+# run tests
+ENTRYPOINT ["make"]
+CMD ["test"]
+
+#
+# ------ Go Builder ------
+#
+FROM godev AS builder
+
+# build binary
+RUN make
+
+#
+# ------ Workflow Controller image ------
+#
 FROM busybox
 LABEL maintainer "salvatore-dario.minonne@amadeus.com"
-ADD workflow-controller /workflow-controller
+COPY --from=builder /go/src/github.com/sdminonne/workflow-controller/workflow-controller /workflow-controller
 ENTRYPOINT ["/workflow-controller"]

Makefile

@@ -29,9 +29,14 @@ build: ${ARTIFACT}
 ${ARTIFACT}: ${SOURCES}
 	CGO_ENABLED=0 GOOS=linux go build -i -installsuffix cgo -ldflags '-w' -o ${ARTIFACT} ./main.go
 
-container: build
+container:
 	docker build -t $(PREFIX):$(TAG) .
 
+container_test:
+	touch coverage.txt
+	docker build -t $(PREFIX):tester --target tester .
+	docker run -it --rm --name tester -v $(PWD)/coverage.txt:/go/src/github.com/sdminonne/workflow-controller/coverage.txt $(PREFIX):tester
+
 test:
 	./go.test.sh