Added build option for armhf / armv7 (#355)

Makefile

@@ -53,7 +53,7 @@ build: ## Build sidecar binary for local target system
 	$(GO) build $(BUILD_OPTS) -v -i -o graylog-sidecar
 
 # does not include build-darwin as that only runs with homebrew on a Mac
-build-all: build-linux build-linux32 build-windows build-windows32
+build-all: build-armhf build-linux build-linux32 build-windows build-windows32
 
 build-linux: ## Build sidecar binary for Linux
 	@mkdir -p build/$(COLLECTOR_VERSION)/linux/amd64
@@ -65,6 +65,10 @@ solaris-sigar-patch:
 		wget -O vendor/github.com/cloudfoundry/gosigar/sigar_solaris.go https://raw.githubusercontent.com/amitkris/gosigar/9fc0903125acd1a0dc7635f8670088339865bcd5/sigar_solaris.go; \
 	fi
 
+build-armhf: ## Build sidecar binary for armhf
+	@mkdir -p build/$(COLLECTOR_VERSION)/linux/armhf
+	GOOS=linux GOARCH=arm GOARM=7 $(GO) build $(BUILD_OPTS) -pkgdir $(GOPATH)/go_armhf  -v -i -o build/$(COLLECTOR_VERSION)/linux/armhf/graylog-sidecar
+
 build-solaris: solaris-sigar-patch ## Build sidecar binary for Solaris/OmniOS/Illumos
 	@mkdir -p build/$(COLLECTOR_VERSION)/solaris/amd64
 	GOOS=solaris GOARCH=amd64 $(GO) build $(BUILD_OPTS) -v -i -o build/$(COLLECTOR_VERSION)/solaris/amd64/graylog-sidecar
@@ -89,11 +93,17 @@ build-windows32: ## Build sidecar binary for Windows 32bit
 	@mkdir -p build/$(COLLECTOR_VERSION)/windows/386
 	GOOS=windows GOARCH=386 CGO_ENABLED=1 CC=i686-w64-mingw32-gcc $(GO) build $(BUILD_OPTS) -pkgdir $(GOPATH)/go_win32 -v -i -o build/$(COLLECTOR_VERSION)/windows/386/graylog-sidecar.exe
 
-package-all: prepare-package package-linux package-linux32 package-windows package-tar
+package-all: prepare-package package-armhf package-linux package-linux32 package-windows package-tar
 
 prepare-package:
 	@dist/fetch_collectors.sh
 
+package-armhf: ## Create Linux system package
+	@fpm-cook clean dist/recipearm.rb
+	@rm -rf dist/cache dist/tmp-build dist/tmp-dest
+	@fpm-cook -t deb package dist/recipearm.rb
+	@fpm-cook -t rpm package dist/recipearm.rb
+
 package-linux: ## Create Linux system package
 	@fpm-cook clean dist/recipe.rb
 	@rm -rf dist/cache dist/tmp-build dist/tmp-dest

dist/recipearm.rb

@@ -0,0 +1,32 @@
+require_relative 'tools'
+
+class GraylogSidecar < FPM::Cookery::Recipe
+  description 'Graylog collector sidecar'
+
+  name     'graylog-sidecar'
+  version  data.version
+  revision data.revision
+  homepage 'https://graylog.org'
+  arch     'armhf'
+
+  source   "file:../../build/#{version}/linux/armhf/graylog-sidecar"
+
+  maintainer 'Graylog, Inc. <[email protected]>'
+  vendor     'graylog'
+  license    'GPLv3'
+
+  config_files '/etc/graylog/sidecar/sidecar.yml'
+
+  fpm_attributes rpm_os: 'linux'
+
+  def build
+  end
+
+  def install
+    bin.install 'graylog-sidecar'
+    etc('graylog/sidecar').install '../../../sidecar-example.yml', 'sidecar.yml'
+    var('lib/graylog-sidecar/generated').mkdir
+    var('log/graylog-sidecar').mkdir
+    var('run/graylog-sidecar').mkdir
+  end
+end