Add Cloudwatch graph to grabana

graph/graph.go

@@ -8,6 +8,7 @@ import (
 	"github.com/K-Phoen/grabana/errors"
 	"github.com/K-Phoen/grabana/graph/series"
 	"github.com/K-Phoen/grabana/links"
+	"github.com/K-Phoen/grabana/target/cloudwatch"
 	"github.com/K-Phoen/grabana/target/graphite"
 	"github.com/K-Phoen/grabana/target/influxdb"
 	"github.com/K-Phoen/grabana/target/prometheus"
@@ -186,6 +187,25 @@ func WithStackdriverTarget(target *stackdriver.Stackdriver) Option {
 	}
 }
 
+// WithCloudwatchTarget adds a cloudwatch metric to the graph.
+func WithCloudwatchTarget(metric string, namespace string, options ...cloudwatch.Option) Option {
+	target := cloudwatch.New(metric, namespace, options...)
+
+	return func(graph *Graph) error {
+		graph.Builder.AddTarget(&sdk.Target{
+			RefID:        target.Ref,
+			Namespace:    target.Namespace,
+			MetricName:   target.MetricName,
+			Statistics:   target.Statistics,
+			Dimensions:   target.Dimensions,
+			Region:       target.Region,
+			LegendFormat: target.LegendFormat,
+		})
+
+		return nil
+	}
+}
+
 // DataSource sets the data source to be used by the graph.
 func DataSource(source string) Option {
 	return func(graph *Graph) error {

graph/graph_test.go

@@ -377,3 +377,14 @@ func TestInvalidSeriesOverridesAreRejected(t *testing.T) {
 	req.Error(err)
 	req.ErrorIs(err, errors.ErrInvalidArgument)
 }
+
+func TestGraphPanelCanHaveCloudwatchTargets(t *testing.T) {
+	req := require.New(t)
+
+	panel, err := New("", WithCloudwatchTarget(
+		"AWS/ELB", "HTTPCode_Backend_5XX",
+	))
+
+	req.NoError(err)
+	req.Len(panel.Builder.GraphPanel.Targets, 1)
+}

target/cloudwatch/cloudwatch.go

@@ -0,0 +1,65 @@
+package cloudwatch
+
+// Option represents an option that can be used to configure a cloudwatch metric.
+type Option func(target *Cloudwatch)
+
+// Cloudwatch represents a cloudwatch metric.
+type Cloudwatch struct {
+	Ref          string
+	Namespace    string
+	MetricName   string
+	Region       string
+	Statistics   []string
+	Dimensions   map[string]string
+	Period       string
+	LegendFormat string
+}
+
+// New creates a new cloudwatch query.
+func New(metric string, namespace string, options ...Option) *Cloudwatch {
+	cloudwatch := &Cloudwatch{
+		MetricName: metric,
+		Namespace:  namespace,
+	}
+
+	for _, opt := range options {
+		opt(cloudwatch)
+	}
+
+	return cloudwatch
+}
+
+// Legend sets the legend format.
+func Legend(legend string) Option {
+	return func(cloudwatch *Cloudwatch) {
+		cloudwatch.LegendFormat = legend
+	}
+}
+
+// Region sets the region.
+func Region(region string) Option {
+	return func(cloudwatch *Cloudwatch) {
+		cloudwatch.Region = region
+	}
+}
+
+// Statistic sets the statistic.
+func Statistic(statistics []string) Option {
+	return func(cloudwatch *Cloudwatch) {
+		cloudwatch.Statistics = statistics
+	}
+}
+
+// Dimensions sets the dimensions.
+func Dimensions(dimensions map[string]string) Option {
+	return func(cloudwatch *Cloudwatch) {
+		cloudwatch.Dimensions = dimensions
+	}
+}
+
+// Ref sets the reference ID for this query.
+func Ref(ref string) Option {
+	return func(cloudwatch *Cloudwatch) {
+		cloudwatch.Ref = ref
+	}
+}

target/cloudwatch/cloudwatch_test.go

@@ -0,0 +1,63 @@
+package cloudwatch
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestNewCloudwatchTargetCanBeCreated(t *testing.T) {
+	req := require.New(t)
+	metricName := "Cloudwatch"
+	namespace := "Test"
+
+	target := New(metricName, namespace)
+
+	req.Equal(metricName, target.MetricName)
+	req.Equal(namespace, target.Namespace)
+}
+
+func TestLegendCanBeConfigured(t *testing.T) {
+	req := require.New(t)
+	legend := "lala"
+
+	target := New("", "", Legend(legend))
+
+	req.Equal(legend, target.LegendFormat)
+}
+
+func TestRefCanBeConfigured(t *testing.T) {
+	req := require.New(t)
+
+	target := New("", "", Ref("A"))
+
+	req.Equal("A", target.Ref)
+}
+
+func TestRegionCanBeSet(t *testing.T) {
+	req := require.New(t)
+
+	target := New("", "", Region("C"))
+
+	req.Equal("C", target.Region)
+}
+
+func TestStatisticCanBeSet(t *testing.T) {
+	req := require.New(t)
+	statistics := []string{"A", "B", "C"}
+
+	target := New("", "", Statistic(statistics))
+
+	req.Equal(statistics, target.Statistics)
+}
+
+func TestDimensionsCanBeSet(t *testing.T) {
+	req := require.New(t)
+	dimensions := map[string]string{
+		"one": "1",
+	}
+
+	target := New("", "", Dimensions(dimensions))
+
+	req.Equal(dimensions, target.Dimensions)
+}