Fix DatadogMetric generation with operator-sdk 0.17

the CRD generator doesn't support `float64` as a type of a CRD field.
The sugested workaround is to used instead `resource.Quantity`.
Related issue: kubernetes-sigs/controller-tools#245

Signed-off-by: cedric lamoriniere <cedric.lamoriniere@datadoghq.com>

deploy/crds/datadoghq.com_datadogmetrics_crd.yaml

@@ -88,8 +88,14 @@ spec:
                 - type
                 type: object
               type: array
+              x-kubernetes-list-type: set
             currentValue:
+              anyOf:
+              - type: integer
+              - type: string
               description: Value is the latest value of the metric
+              pattern: ^(\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))(([KMGTPE]i)|[numkMGTPE]|([eE](\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))))?$
+              x-kubernetes-int-or-string: true
           required:
           - currentValue
           type: object

pkg/apis/datadoghq/v1alpha1/datadogmetric_types.go

@@ -7,6 +7,7 @@ package v1alpha1
 
 import (
 	corev1 "k8s.io/api/core/v1"
+	"k8s.io/apimachinery/pkg/api/resource"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 )
 
@@ -24,7 +25,7 @@ type DatadogMetricStatus struct {
 	// +listType=set
 	Conditions []DatadogMetricCondition `json:"conditions,omitempty"`
 	// Value is the latest value of the metric
-	Value float64 `json:"currentValue"`
+	Value resource.Quantity `json:"currentValue"`
 }
 
 // DatadogMetricCondition describes the state of a DatadogMetric at a certain point.