Fix build target and linting issues

.github/workflows/build.yml

@@ -2,7 +2,7 @@ name: Build
 
 on:
   push:
-    branches: [ master ]
+    branches: [ main ]
     paths-ignore:
       - README.md
       - LICENSE
@@ -18,7 +18,7 @@ jobs:
       - name: Install Go
         uses: actions/setup-go@v1
         with:
-          go-version: ^1.15
+          go-version: ^1.16
       - name: Checkout code
         uses: actions/checkout@v1
       - name: Install golangci-lint
@@ -27,34 +27,16 @@ jobs:
       - name: Run linters
         run: |
           export PATH=$PATH:$(go env GOPATH)/bin
+          go mod download
           golangci-lint run
-  test:
-    name: Test
-    strategy:
-      matrix:
-        go-version: [ 1.15.x ]
-        platform: [ ubuntu-latest ]
-    runs-on: ${{ matrix.platform }}
-    needs: [ lint ]
-    steps:
-      - name: Install Go
-        if: success()
-        uses: actions/setup-go@v1
-        with:
-          go-version: ${{ matrix.go-version }}
-      - name: Checkout code
-        uses: actions/checkout@v1
-      - name: Run tests
-        run: go test -v -race -covermode=atomic ./...
 
   build:
     runs-on: ubuntu-latest
-    needs: [ test ]
     steps:
       - name: Install Go
         uses: actions/setup-go@v1
         with:
-          go-version: ^1.15
+          go-version: ^1.16
       - name: Checkout code
         uses: actions/checkout@v1
       - name: Get dependencies
@@ -64,6 +46,7 @@ jobs:
       - name: Build
         run: |
           export GO111MODULE=on
+          go mod download
           GOOS=linux   GOARCH=amd64 go build -o bin/hcloud-pricing-exporter-linux-amd64       main.go
           GOOS=linux   GOARCH=arm64 go build -o bin/hcloud-pricing-exporter-linux-arm64       main.go
           GOOS=windows GOARCH=amd64 go build -o bin/hcloud-pricing-exporter-windows-amd64.exe main.go

.github/workflows/release.yml

@@ -17,7 +17,7 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@v2
         with:
-          go-version: 1.15
+          go-version: 1.16
       - name: Run GoReleaser
         uses: goreleaser/goreleaser-action@v2
         with:

Dockerfile

@@ -7,6 +7,7 @@ ADD . /app/
 WORKDIR /app
 
 # Build the application
+RUN CGO_ENABLED=0 GOOS=linux GOARCH=${ARCH} go mod download
 RUN CGO_ENABLED=0 GOOS=linux GOARCH=${ARCH} go build -o run .
 
 # Add the execution user

fetcher/prices.go

@@ -8,7 +8,7 @@ import (
 	"github.com/hetznercloud/hcloud-go/hcloud"
 )
 
-// PriceProvider provides easy access to current HCloud prices
+// PriceProvider provides easy access to current HCloud prices.
 type PriceProvider struct {
 	Client      *hcloud.Client
 	pricing     *hcloud.Pricing

fetcher/server_traffic.go

@@ -26,7 +26,7 @@ func (serverTraffic serverTraffic) Run(client *hcloud.Client) error {
 	for _, s := range servers {
 		location := s.Datacenter.Location
 
-		additionalTraffic := s.OutgoingTraffic - s.IncludedTraffic
+		additionalTraffic := int(s.OutgoingTraffic) - int(s.IncludedTraffic)
 		if additionalTraffic < 0 {
 			serverTraffic.hourly.WithLabelValues(s.Name, location.Name, s.ServerType.Name).Set(0)
 			serverTraffic.monthly.WithLabelValues(s.Name, location.Name, s.ServerType.Name).Set(0)

fetcher/volume.go

@@ -25,7 +25,7 @@ func (volume volume) Run(client *hcloud.Client) error {
 	}
 
 	for _, v := range volumes {
-		monthlyPrice := math.Ceil(float64(v.Size/sizeGB)) * volume.pricing.Volume()
+		monthlyPrice := math.Ceil(float64(v.Size)/sizeGB) * volume.pricing.Volume()
 		hourlyPrice := pricingPerHour(monthlyPrice)
 
 		volume.hourly.WithLabelValues(v.Name, v.Location.Name, strconv.Itoa(v.Size)).Set(hourlyPrice)

main.go

@@ -19,21 +19,13 @@ const (
 	defaultFetchInterval = 1 * time.Minute
 )
 
-func toScheduler(client *hcloud.Client, f func(*hcloud.Client) error) func() {
-	return func() {
-		if err := f(client); err != nil {
-			panic(err)
-		}
-	}
-}
-
-func main() {
-	var (
+var (
 	hcloudAPIToken string
 	port           uint
 	fetchInterval  time.Duration
-	)
+)
 
+func handleFlags() {
 	flag.StringVar(&hcloudAPIToken, "hcloud-token", "", "the token to authenticate against the HCloud API")
 	flag.UintVar(&port, "port", defaultPort, "the port that the exporter exposes its data on")
 	flag.DurationVar(&fetchInterval, "fetch-interval", defaultFetchInterval, "the interval between data fetching cycles")
@@ -47,19 +39,29 @@ func main() {
 	if hcloudAPIToken == "" {
 		panic(fmt.Errorf("no API token for HCloud specified, but required"))
 	}
+}
+
+func toScheduler(client *hcloud.Client, f func(*hcloud.Client) error) func() {
+	return func() {
+		if err := f(client); err != nil {
+			panic(err)
+		}
+	}
+}
+
+func main() {
+	handleFlags()
 
 	client := hcloud.NewClient(hcloud.WithToken(hcloudAPIToken))
 	priceRepository := &fetcher.PriceProvider{Client: client}
 
-	var (
-		floatingIP    = fetcher.NewFloatingIP(priceRepository)
-		loadBalancer  = fetcher.NewLoadbalancer(priceRepository)
-		server        = fetcher.NewServer(priceRepository)
-		serverBackup  = fetcher.NewServerBackup(priceRepository)
-		serverTraffic = fetcher.NewServerTraffic(priceRepository)
-		snapshot      = fetcher.NewSnapshot(priceRepository)
-		volume        = fetcher.NewVolume(priceRepository)
-	)
+	floatingIP := fetcher.NewFloatingIP(priceRepository)
+	loadBalancer := fetcher.NewLoadbalancer(priceRepository)
+	server := fetcher.NewServer(priceRepository)
+	serverBackup := fetcher.NewServerBackup(priceRepository)
+	serverTraffic := fetcher.NewServerTraffic(priceRepository)
+	snapshot := fetcher.NewSnapshot(priceRepository)
+	volume := fetcher.NewVolume(priceRepository)
 
 	scheduler.RunTaskAtInterval(toScheduler(client, floatingIP.Run), fetchInterval, 0)
 	scheduler.RunTaskAtInterval(toScheduler(client, loadBalancer.Run), fetchInterval, 0)