feat: initial alerting support

PROJECT

@@ -42,4 +42,13 @@ resources:
   kind: GrafanaFolder
   path: github.com/grafana/grafana-operator/api/v1beta1
   version: v1beta1
+- api:
+    crdVersion: v1
+    namespaced: true
+  controller: true
+  domain: integreatly.org
+  group: grafana
+  kind: GrafanaAlertRuleGroup
+  path: github.com/grafana/grafana-operator/api/v1beta1
+  version: v1beta1
 version: "3"

api/v1beta1/grafanaalertrulegroup_types.go

@@ -0,0 +1,129 @@
+/*
+Copyright 2022.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package v1beta1
+
+import (
+	"github.com/grafana/grafana-openapi-client-go/models"
+	apiextensions "k8s.io/apiextensions-apiserver/pkg/apis/apiextensions/v1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+)
+
+// GrafanaAlertRuleGroupSpec defines the desired state of GrafanaAlertRuleGroup
+type GrafanaAlertRuleGroupSpec struct {
+	// +optional
+	// +kubebuilder:validation:Type=string
+	// +kubebuilder:validation:Format=duration
+	// +kubebuilder:validation:Pattern="^([0-9]+(\\.[0-9]+)?(ns|us|µs|ms|s|m|h))+$"
+	// +kubebuilder:default="10m"
+	ResyncPeriod metav1.Duration `json:"resyncPeriod,omitempty"`
+
+	// selects Grafanas for import
+	InstanceSelector *metav1.LabelSelector `json:"instanceSelector"`
+
+	// UID of the folder containing this rule group
+	FolderUID string `json:"folderUID"`
+
+	Rules []AlertRule `json:"rules"`
+
+	// +kubebuilder:validation:Type=string
+	// +kubebuilder:validation:Format=duration
+	// +kubebuilder:validation:Pattern="^([0-9]+(\\.[0-9]+)?(ns|us|µs|ms|s|m|h))+$"
+	// +kubebuilder:validation:Required
+	Interval metav1.Duration `json:"interval"`
+}
+
+// AlertRule defines a specific rule to be evaluated. It is based on the upstream model with some k8s specific type mappings
+type AlertRule struct {
+	Annotations map[string]string `json:"annotations,omitempty"`
+
+	Condition string `json:"condition"`
+
+	// +kubebuilder:validation:Required
+	Data []*AlertQuery `json:"data"`
+
+	// +kubebuilder:validation:Enum=OK;Alerting;Error
+	ExecErrState string `json:"execErrState"`
+
+	// +kubebuilder:validation:Type=string
+	// +kubebuilder:validation:Format=duration
+	// +kubebuilder:validation:Pattern="^([0-9]+(\\.[0-9]+)?(ns|us|µs|ms|s|m|h))+$"
+	// +kubebuilder:validation:Required
+	For *metav1.Duration `json:"for"`
+
+	IsPaused bool `json:"isPaused,omitempty"`
+
+	Labels map[string]string `json:"labels,omitempty"`
+
+	// +kubebuilder:validation:Enum=Alerting;NoData;OK
+	NoDataState *string `json:"noDataState"`
+
+	// +kubebuilder:validation:MinLength=1
+	// +kubebuilder:validation:MaxLength=190
+	// +kubebuilder:example="Always firing"
+	Title string `json:"title"`
+
+	// +kubebuilder:validation:Pattern="^[a-zA-Z0-9-_]+$"
+	UID string `json:"uid"`
+}
+
+type AlertQuery struct {
+	// Grafana data source unique identifier; it should be '__expr__' for a Server Side Expression operation.
+	DatasourceUID string `json:"datasourceUid,omitempty"`
+
+	// JSON is the raw JSON query and includes the above properties as well as custom properties.
+	Model *apiextensions.JSON `json:"model,omitempty"`
+
+	// QueryType is an optional identifier for the type of query.
+	// It can be used to distinguish different types of queries.
+	QueryType string `json:"queryType,omitempty"`
+
+	// RefID is the unique identifier of the query, set by the frontend call.
+	RefID string `json:"refId,omitempty"`
+
+	// relative time range
+	RelativeTimeRange *models.RelativeTimeRange `json:"relativeTimeRange,omitempty"`
+}
+
+// GrafanaAlertRuleGroupStatus defines the observed state of GrafanaAlertRuleGroup
+type GrafanaAlertRuleGroupStatus struct {
+	Conditions []metav1.Condition `json:"conditions"`
+}
+
+//+kubebuilder:object:root=true
+//+kubebuilder:subresource:status
+
+// GrafanaAlertRuleGroup is the Schema for the grafanaalertrulegroups API
+type GrafanaAlertRuleGroup struct {
+	metav1.TypeMeta   `json:",inline"`
+	metav1.ObjectMeta `json:"metadata,omitempty"`
+
+	Spec   GrafanaAlertRuleGroupSpec   `json:"spec,omitempty"`
+	Status GrafanaAlertRuleGroupStatus `json:"status,omitempty"`
+}
+
+//+kubebuilder:object:root=true
+
+// GrafanaAlertRuleGroupList contains a list of GrafanaAlertRuleGroup
+type GrafanaAlertRuleGroupList struct {
+	metav1.TypeMeta `json:",inline"`
+	metav1.ListMeta `json:"metadata,omitempty"`
+	Items           []GrafanaAlertRuleGroup `json:"items"`
+}
+
+func init() {
+	SchemeBuilder.Register(&GrafanaAlertRuleGroup{}, &GrafanaAlertRuleGroupList{})
+}