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package grafanadatasource
import (
"bytes"
"context"
"encoding/json"
onapv1alpha1 "visualization-operator/pkg/apis/onap/v1alpha1"
"k8s.io/apimachinery/pkg/api/errors"
"k8s.io/apimachinery/pkg/runtime"
"net/http"
"sigs.k8s.io/controller-runtime/pkg/client"
"sigs.k8s.io/controller-runtime/pkg/controller"
"sigs.k8s.io/controller-runtime/pkg/handler"
"sigs.k8s.io/controller-runtime/pkg/manager"
"sigs.k8s.io/controller-runtime/pkg/reconcile"
logf "sigs.k8s.io/controller-runtime/pkg/runtime/log"
"sigs.k8s.io/controller-runtime/pkg/source"
)
var log = logf.Log.WithName("controller_grafanadatasource")
// Add creates a new GrafanaDataSource Controller and adds it to the Manager. The Manager will set fields on the Controller
// and Start it when the Manager is Started.
func Add(mgr manager.Manager) error {
return add(mgr, newReconciler(mgr))
}
// newReconciler returns a new reconcile.Reconciler
func newReconciler(mgr manager.Manager) reconcile.Reconciler {
return &ReconcileGrafanaDataSource{client: mgr.GetClient(), scheme: mgr.GetScheme()}
}
// add adds a new Controller to mgr with r as the reconcile.Reconciler
func add(mgr manager.Manager, r reconcile.Reconciler) error {
// Create a new controller
c, err := controller.New("grafanadatasource-controller", mgr, controller.Options{Reconciler: r})
if err != nil {
return err
}
// Watch for changes to primary resource GrafanaDataSource
err = c.Watch(&source.Kind{Type: &onapv1alpha1.GrafanaDataSource{}}, &handler.EnqueueRequestForObject{})
if err != nil {
return err
}
return nil
}
// blank assignment to verify that ReconcileGrafanaDataSource implements reconcile.Reconciler
var _ reconcile.Reconciler = &ReconcileGrafanaDataSource{}
// ReconcileGrafanaDataSource reconciles a GrafanaDataSource object
type ReconcileGrafanaDataSource struct {
// This client, initialized using mgr.Client() above, is a split client
// that reads objects from the cache and writes to the apiserver
client client.Client
scheme *runtime.Scheme
}
// Reconcile reads that state of the cluster for a GrafanaDataSource object and makes changes based on the state read
// and what is in the GrafanaDataSource.Spec
// Note:
// The Controller will requeue the Request to be processed again if the returned error is non-nil or
// Result.Requeue is true, otherwise upon completion it will remove the work from the queue.
func (r *ReconcileGrafanaDataSource) Reconcile(request reconcile.Request) (reconcile.Result, error) {
reqLogger := log.WithValues("Request.Namespace", request.Namespace, "Request.Name", request.Name)
reqLogger.Info("Reconciling GrafanaDataSource")
// Fetch the GrafanaDataSource instance
instance := &onapv1alpha1.GrafanaDataSource{}
err := r.client.Get(context.TODO(), request.NamespacedName, instance)
if err != nil {
if errors.IsNotFound(err) {
// Request object not found, could have been deleted after reconcile request.
// Owned objects are automatically garbage collected. For additional cleanup logic use finalizers.
// Return and don't requeue
return reconcile.Result{}, nil
}
// Error reading the object - requeue the request.
return reconcile.Result{}, err
}
datasources := instance.Spec.Datasources
grafana := instance.Spec.Grafana
reqLogger.V(1).Info(" Datasource Name ", "datasources", datasources)
//loop through all datasources in the spec
for _, datasource := range datasources {
//check if datasource exists
grafanaURL := grafana["url"] + "/api/datasources/name/" + datasource.Name
grafanaUsername := grafana["username"]
grafanaPassword := grafana["password"]
client := &http.Client{}
req, err := http.NewRequest("GET", grafanaURL, nil)
if err != nil {
reqLogger.Error(err, "GET REQUEST error")
return reconcile.Result{}, err
}
req.SetBasicAuth(grafanaUsername, grafanaPassword)
getResp, err := client.Do(req)
if err != nil {
reqLogger.Error(err, "GET RESPONSE error")
return reconcile.Result{}, err
}
defer getResp.Body.Close()
//add datasource if datasource does not exist already
if getResp.StatusCode == http.StatusNotFound {
reqLogger.Info("Datasource does not exist, creating one...")
// create datasource
if err := createDataSource(grafana, datasource); err != nil {
return reconcile.Result{}, err
}
} else if getResp.StatusCode == http.StatusOK {
//if datasource already exists
reqLogger.V(1).Info("datasource already exists", "datasource", datasource.Name)
} else {
reqLogger.Error(err, "unknown error", datasource.Name)
}
}
return reconcile.Result{}, nil
}
func createDataSource(grafana map[string]string, datasource onapv1alpha1.Datasource) error {
reqLogger := log.WithValues("Datasource name", datasource.Name, "Datasource URL", datasource.URL)
reqLogger.Info("creating datasource")
grafanaURL := grafana["url"] + "/api/datasources"
grafanaUsername := grafana["username"]
grafanaPassword := grafana["password"]
client := &http.Client{}
postBody, err := json.Marshal(datasource)
if err != nil {
reqLogger.Error(err, "JSON Marshalling error")
return err
}
req, err := http.NewRequest("POST", grafanaURL, bytes.NewBuffer(postBody))
if err != nil {
reqLogger.Error(err, "POST REQUEST error")
return err
}
req.Header.Set("Content-Type", "application/json")
req.SetBasicAuth(grafanaUsername, grafanaPassword)
postResp, err := client.Do(req)
if err != nil {
reqLogger.Error(err, "POST RESPONSE error")
return err
}
defer req.Body.Close()
if postResp.StatusCode == http.StatusOK {
reqLogger.Info("Datasource created")
return nil
}
return err
}
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