Changes for adding Datadog provider

Dockerfile

@@ -1,7 +1,9 @@
-FROM golang:1.16
+ARG BUILD_SPEC="build.amd64"
+FROM golang:1.22
+
 WORKDIR /go/src/github.com/paypal/load-watcher
 COPY . .
-RUN make build
+RUN make ${BUILD_SPEC}
 
 FROM alpine:3.12
 

Makefile

@@ -12,7 +12,6 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-COMMONENVVAR=GOOS=$(shell uname -s | tr A-Z a-z) GOARCH=$(subst x86_64,amd64,$(patsubst i%86,386,$(shell uname -m)))
 BUILDENVVAR=CGO_ENABLED=0
 
 .PHONY: all
@@ -21,7 +20,15 @@ all: build
 
 .PHONY: build
 build:
-	$(COMMONENVVAR) $(BUILDENVVAR) go build -o bin/load-watcher main.go
+	GOOS=linux $(BUILDENVVAR) GOARCH=arm64 go build -o bin/load-watcher main.go
+
+.PHONY:	build.amd64
+build.amd64:
+	GOOS=darwin $(BUILDENVVAR) GOARCH=amd64 go build -o bin/load-watcher main.go
+
+.PHONY:	build.arm64
+build.arm64:
+	GOOS=linux $(BUILDENVVAR) GOARCH=arm64 go build -o bin/load-watcher main.go
 
 .PHONY: clean
 clean:

go.mod

@@ -1,8 +1,9 @@
 module github.com/paypal/load-watcher
 
-go 1.22.0
+go 1.22
 
 require (
+	github.com/DataDog/datadog-api-client-go/v2 v2.31.0
 	github.com/francoispqt/gojay v1.2.13
 	github.com/prometheus/client_golang v1.19.1
 	github.com/prometheus/common v0.55.0
@@ -62,3 +63,45 @@ require (
 	sigs.k8s.io/structured-merge-diff/v4 v4.4.1 // indirect
 	sigs.k8s.io/yaml v1.4.0 // indirect
 )
+
+require (
+	github.com/DataDog/zstd v1.5.2 // indirect
+	github.com/beorn7/perks v1.0.1 // indirect
+	github.com/cespare/xxhash/v2 v2.1.1 // indirect
+	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/go-logr/logr v0.4.0 // indirect
+	github.com/goccy/go-json v0.10.2 // indirect
+	github.com/gogo/protobuf v1.3.2 // indirect
+	github.com/golang/protobuf v1.5.3 // indirect
+	github.com/google/go-cmp v0.5.9 // indirect
+	github.com/google/gofuzz v1.1.0 // indirect
+	github.com/google/uuid v1.5.0 // indirect
+	github.com/googleapis/gnostic v0.5.5 // indirect
+	github.com/imdario/mergo v0.3.5 // indirect
+	github.com/jpillora/backoff v1.0.0 // indirect
+	github.com/json-iterator/go v1.1.11 // indirect
+	github.com/konsorten/go-windows-terminal-sequences v1.0.3 // indirect
+	github.com/matttproud/golang_protobuf_extensions v1.0.1 // indirect
+	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
+	github.com/modern-go/reflect2 v1.0.1 // indirect
+	github.com/mwitkow/go-conntrack v0.0.0-20190716064945-2f068394615f // indirect
+	github.com/pmezard/go-difflib v1.0.0 // indirect
+	github.com/prometheus/client_model v0.2.0 // indirect
+	github.com/prometheus/procfs v0.6.0 // indirect
+	github.com/spf13/pflag v1.0.5 // indirect
+	golang.org/x/net v0.17.0 // indirect
+	golang.org/x/oauth2 v0.10.0 // indirect
+	golang.org/x/sys v0.27.0 // indirect
+	golang.org/x/term v0.13.0 // indirect
+	golang.org/x/text v0.13.0 // indirect
+	golang.org/x/time v0.0.0-20210723032227-1f47c861a9ac // indirect
+	google.golang.org/appengine v1.6.7 // indirect
+	google.golang.org/protobuf v1.31.0 // indirect
+	gopkg.in/inf.v0 v0.9.1 // indirect
+	gopkg.in/yaml.v2 v2.4.0 // indirect
+	gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b // indirect
+	k8s.io/api v0.22.3 // indirect
+	k8s.io/utils v0.0.0-20210819203725-bdf08cb9a70a // indirect
+	sigs.k8s.io/structured-merge-diff/v4 v4.1.2 // indirect
+	sigs.k8s.io/yaml v1.2.0 // indirect
+)

pkg/watcher/api/client.go

@@ -53,6 +53,8 @@ func NewLibraryClient(opts watcher.MetricsProviderOpts) (Client, error) {
 		client.fetcherClient, err = metricsprovider.NewPromClient(opts)
 	case watcher.SignalFxClientName:
 		client.fetcherClient, err = metricsprovider.NewSignalFxClient(opts)
+	case watcher.DatadogClientName:
+		client.fetcherClient, err = metricsprovider.NewDatadogClient(opts)
 	default:
 		client.fetcherClient, err = metricsprovider.NewMetricsServerClient()
 	}