/
checks_controller.go
142 lines (117 loc) · 4.15 KB
/
checks_controller.go
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package checks
import (
"context"
"strings"
pingdomv1alpha1 "github.com/markelog/pingdom-operator/pkg/apis/pingdom/v1alpha1"
"github.com/redhat-cop/operator-utils/pkg/util"
corev1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/api/errors"
"k8s.io/apimachinery/pkg/runtime"
"sigs.k8s.io/controller-runtime/pkg/client"
"sigs.k8s.io/controller-runtime/pkg/controller"
"sigs.k8s.io/controller-runtime/pkg/handler"
logf "sigs.k8s.io/controller-runtime/pkg/log"
"sigs.k8s.io/controller-runtime/pkg/manager"
"sigs.k8s.io/controller-runtime/pkg/reconcile"
"sigs.k8s.io/controller-runtime/pkg/source"
)
const (
// Name is the name of the controller
Name = "controller_checks"
// Finalizer is the name of the controllers finalizer
Finalizer = "cleanup.pingdom"
)
var log = logf.Log.WithName(Name)
// Add creates a new Checks 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 &ReconcileChecks{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("checks-controller", mgr, controller.Options{Reconciler: r})
if err != nil {
return err
}
// Watch for changes to primary resource Checks
err = c.Watch(&source.Kind{Type: &pingdomv1alpha1.Checks{}}, &handler.EnqueueRequestForObject{})
if err != nil {
return err
}
// Watch for changes to secondary resource Pods and requeue the owner Checks
err = c.Watch(&source.Kind{Type: &corev1.Pod{}}, &handler.EnqueueRequestForOwner{
IsController: true,
OwnerType: &pingdomv1alpha1.Checks{},
})
if err != nil {
return err
}
return nil
}
// blank assignment to verify that ReconcileChecks implements reconcile.Reconciler
var _ reconcile.Reconciler = &ReconcileChecks{}
// ReconcileChecks reconciles a Checks object
type ReconcileChecks 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 Checks object and makes changes based on the state read
func (r *ReconcileChecks) Reconcile(request reconcile.Request) (reconcile.Result, error) {
reqLogger := log.WithValues(
"Request.Namespace", request.Namespace,
"Request.Name", request.Name,
)
reqLogger.Info("Reconciling Checks")
// Fetch the Checks instance
instance := &pingdomv1alpha1.Checks{}
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.
// Return and don't requeue
return reconcile.Result{}, nil
}
// Error reading the object - requeue the request.
return reconcile.Result{}, err
}
// Remove the check
if util.IsBeingDeleted(instance) {
// Remove it, yeah, but only if we have a finalizer
if !util.HasFinalizer(instance, Finalizer) {
return reconcile.Result{}, nil
}
reqLogger.Info("Remove HTTP check")
if err := instance.DeleteHTTP(); err != nil {
// "Invalid check identifier" error means we have deleted
// the check with other means
if !strings.Contains(err.Error(), "Invalid check identifier") {
reqLogger.Error(err, "Couldn't remove checker")
return reconcile.Result{}, nil
}
reqLogger.Info("Seems you have removed the check already?")
}
util.RemoveFinalizer(instance, Finalizer)
err := r.client.Update(context.TODO(), instance)
if err != nil {
return reconcile.Result{}, err
}
} else {
reqLogger.Info("Setup HTTP check")
if err := instance.SetupHTTP(); err != nil {
return reconcile.Result{}, err
}
err = r.client.Status().Update(context.TODO(), instance)
if err != nil {
reqLogger.Error(err, "Failed to update pingdom ID")
return reconcile.Result{}, err
}
}
return reconcile.Result{}, nil
}