Implement standard release procedure for prometheus exporters. Use CircleCI to...

Implement standard release procedure for prometheus exporters. Use CircleCI to build new binaries using promu and release to github, docker and quay.

.promu.yml

+repository:
+    path: github.com/Lusitaniae/apache_exporter
+build:
+    flags: -a -tags netgo
+    ldflags: |
+        -X {{repoPath}}/vendor/github.com/prometheus/common/version.Version={{.Version}}
+        -X {{repoPath}}/vendor/github.com/prometheus/common/version.Revision={{.Revision}}
+        -X {{repoPath}}/vendor/github.com/prometheus/common/version.Branch={{.Branch}}
+        -X {{repoPath}}/vendor/github.com/prometheus/common/version.BuildUser={{user}}@{{host}}
+        -X {{repoPath}}/vendor/github.com/prometheus/common/version.BuildDate={{date "20060102-15:04:05"}}
+tarball:
+    files:
+        - LICENSE

Dockerfile

-FROM golang:alpine
+FROM quay.io/prometheus/busybox:latest
 
-RUN apk add --no-cache ca-certificates git
-RUN go get github.com/neezgee/apache_exporter
+COPY apache_exporter /bin/apache_exporter
 
+ENTRYPOINT ["/bin/apache_exporter"]
 EXPOSE     9117
-ENTRYPOINT ["/go/bin/apache_exporter"]
\ No newline at end of file

Makefile

+# Copyright 2015 The Prometheus Authors
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# 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    := GO15VENDOREXPERIMENT=1 go
+PROMU := $(GOPATH)/bin/promu
+pkgs   = $(shell $(GO) list ./... | grep -v /vendor/)
+
+PREFIX                  ?= $(shell pwd)
+BIN_DIR                 ?= $(shell pwd)
+DOCKER_IMAGE_NAME       ?= apache-exporter
+DOCKER_IMAGE_TAG        ?= $(subst /,-,$(shell git rev-parse --abbrev-ref HEAD))
+
+all: format build test
+
+test:
+	@echo ">> running tests"
+	@$(GO) test -short $(pkgs)
+
+style:
+	@echo ">> checking code style"
+	@! gofmt -d $(shell find . -path ./vendor -prune -o -name '*.go' -print) | grep '^'
+
+format:
+	@echo ">> formatting code"
+	@$(GO) fmt $(pkgs)
+
+vet:
+	@echo ">> vetting code"
+	@$(GO) vet $(pkgs)
+
+build: promu
+	@echo ">> building binaries"
+	@$(PROMU) build --prefix $(PREFIX)
+
+tarball: promu
+	@echo ">> building release tarball"
+	@$(PROMU) tarball --prefix $(PREFIX) $(BIN_DIR)
+
+docker:
+	@echo ">> building docker image"
+	@docker build -t "$(DOCKER_IMAGE_NAME):$(DOCKER_IMAGE_TAG)" .
+
+promu:
+	@GOOS=$(shell uname -s | tr A-Z a-z) \
+		GOARCH=$(subst x86_64,amd64,$(patsubst i%86,386,$(shell uname -m))) \
+		$(GO) get -u github.com/prometheus/promu
+
+.PHONY: all style format build test vet tarball docker promu

circle.yml

+machine:
+  environment:
+    DOCKER_IMAGE_NAME: lusotycoon/apache-exporter
+    QUAY_IMAGE_NAME: quay.io/lusitaniae/apache-exporter
+    DOCKER_TEST_IMAGE_NAME: quay.io/prometheus/golang-builder:1.8-base
+    REPO_PATH: github.com/Lusitaniae/apache_exporter
+  pre:
+    - sudo curl -L -o /usr/bin/docker 'https://s3-external-1.amazonaws.com/circle-downloads/docker-1.9.1-circleci'
+    - sudo chmod 0755 /usr/bin/docker
+    - sudo curl -L 'https://github.com/aktau/github-release/releases/download/v0.6.2/linux-amd64-github-release.tar.bz2' | tar xvjf - --strip-components 3 -C $HOME/bin
+  services:
+    - docker
+
+dependencies:
+  pre:
+    - make promu
+    - docker info
+  override:
+    - promu crossbuild
+    - ln -s .build/linux-amd64/apache_exporter apache_exporter
+    - |
+      if [ -n "$CIRCLE_TAG" ]; then
+        make docker DOCKER_IMAGE_NAME=$DOCKER_IMAGE_NAME DOCKER_IMAGE_TAG=$CIRCLE_TAG
+        make docker DOCKER_IMAGE_NAME=$QUAY_IMAGE_NAME DOCKER_IMAGE_TAG=$CIRCLE_TAG
+      else
+        make docker DOCKER_IMAGE_NAME=$DOCKER_IMAGE_NAME
+        make docker DOCKER_IMAGE_NAME=$QUAY_IMAGE_NAME
+      fi
+  post:
+    - mkdir $CIRCLE_ARTIFACTS/binaries/ && cp -a .build/* $CIRCLE_ARTIFACTS/binaries/
+    - docker images
+
+test:
+  override:
+    - docker run --rm -t -v "$(pwd):/app" "${DOCKER_TEST_IMAGE_NAME}" -i "${REPO_PATH}" -T
+
+deployment:
+  hub_branch:
+    branch: master
+    owner: Lusitaniae
+    commands:
+      - docker login -e $DOCKER_EMAIL -u $DOCKER_LOGIN -p $DOCKER_PASSWORD
+      - docker login -e $QUAY_EMAIL -u $QUAY_LOGIN -p $QUAY_PASSWORD quay.io
+      - docker push $DOCKER_IMAGE_NAME
+      - docker push $QUAY_IMAGE_NAME
+  hub_tag:
+    tag: /^v[0-9]+(\.[0-9]+){2}(-.+|[^-.]*)$/
+    owner: Lusitaniae
+    commands:
+      - promu crossbuild tarballs
+      - promu checksum .tarballs
+      - promu release .tarballs
+      - mkdir $CIRCLE_ARTIFACTS/releases/ && cp -a .tarballs/* $CIRCLE_ARTIFACTS/releases/
+      - docker login -e $DOCKER_EMAIL -u $DOCKER_LOGIN -p $DOCKER_PASSWORD
+      - docker login -e $QUAY_EMAIL -u $QUAY_LOGIN -p $QUAY_PASSWORD quay.io
+      - |
+        if [[ "$CIRCLE_TAG" =~ ^v[0-9]+(\.[0-9]+){2}$ ]]; then
+            docker tag "$DOCKER_IMAGE_NAME:$CIRCLE_TAG" "$DOCKER_IMAGE_NAME:latest"
+            docker tag "$QUAY_IMAGE_NAME:$CIRCLE_TAG" "$QUAY_IMAGE_NAME:latest"
+        fi
+      - docker push $DOCKER_IMAGE_NAME
+      - docker push $QUAY_IMAGE_NAME