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integration_controller.go
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/
integration_controller.go
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package integration
import (
"context"
"k8s.io/apimachinery/pkg/api/errors"
k8serrors "k8s.io/apimachinery/pkg/api/errors"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/types"
k8sclient "sigs.k8s.io/controller-runtime/pkg/client"
"sigs.k8s.io/controller-runtime/pkg/controller"
"sigs.k8s.io/controller-runtime/pkg/event"
"sigs.k8s.io/controller-runtime/pkg/handler"
"sigs.k8s.io/controller-runtime/pkg/manager"
"sigs.k8s.io/controller-runtime/pkg/predicate"
"sigs.k8s.io/controller-runtime/pkg/reconcile"
"sigs.k8s.io/controller-runtime/pkg/source"
"github.com/apache/camel-k/pkg/apis/camel/v1alpha1"
"github.com/apache/camel-k/pkg/client"
"github.com/apache/camel-k/pkg/util/log"
)
/**
* USER ACTION REQUIRED: This is a scaffold file intended for the user to modify with their own Controller
* business logic. Delete these comments after modifying this file.*
*/
// Add creates a new Integration 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 {
c, err := client.FromManager(mgr)
if err != nil {
return err
}
return add(mgr, newReconciler(mgr, c))
}
// newReconciler returns a new reconcile.Reconciler
func newReconciler(mgr manager.Manager, c client.Client) reconcile.Reconciler {
return &ReconcileIntegration{
client: c,
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("integration-controller", mgr, controller.Options{Reconciler: r})
if err != nil {
return err
}
// Watch for changes to primary resource Integration
err = c.Watch(&source.Kind{Type: &v1alpha1.Integration{}}, &handler.EnqueueRequestForObject{}, predicate.Funcs{
UpdateFunc: func(e event.UpdateEvent) bool {
oldIntegration := e.ObjectOld.(*v1alpha1.Integration)
newIntegration := e.ObjectNew.(*v1alpha1.Integration)
// Ignore updates to the integration status in which case metadata.Generation does not change,
// or except when the integration phase changes as it's used to transition from one phase
// to another
return oldIntegration.Generation != newIntegration.Generation ||
oldIntegration.Status.Phase != newIntegration.Status.Phase
},
DeleteFunc: func(e event.DeleteEvent) bool {
// Evaluates to false if the object has been confirmed deleted
return !e.DeleteStateUnknown
},
})
if err != nil {
return err
}
// Watch for changes to secondary resource Builds and requeue the owner IntegrationContext
err = c.Watch(&source.Kind{Type: &v1alpha1.Build{}},
&handler.EnqueueRequestForOwner{
IsController: true,
OwnerType: &v1alpha1.Integration{},
},
predicate.Funcs{
UpdateFunc: func(e event.UpdateEvent) bool {
oldBuild := e.ObjectOld.(*v1alpha1.Build)
newBuild := e.ObjectNew.(*v1alpha1.Build)
// Ignore updates to the build CR except when the build phase changes
// as it's used to transition the integration from one phase to another
// during image build
return oldBuild.Status.Phase != newBuild.Status.Phase
},
})
if err != nil {
return err
}
// Watch for IntegrationPlatform phase transitioning to ready
// and enqueue requests for any integrations that are in phase waiting for platform
err = c.Watch(&source.Kind{Type: &v1alpha1.IntegrationPlatform{}}, &handler.EnqueueRequestsFromMapFunc{
ToRequests: handler.ToRequestsFunc(func(a handler.MapObject) []reconcile.Request {
platform := a.Object.(*v1alpha1.IntegrationPlatform)
requests := []reconcile.Request{}
if platform.Status.Phase == v1alpha1.IntegrationPlatformPhaseReady {
list := &v1alpha1.IntegrationList{}
if err := mgr.GetClient().List(context.TODO(), &k8sclient.ListOptions{Namespace: platform.Namespace}, list); err != nil {
log.Error(err, "Failed to retrieve integration list")
return requests
}
for _, integration := range list.Items {
if integration.Status.Phase == v1alpha1.IntegrationPhaseWaitingForPlatform {
requests = append(requests, reconcile.Request{
NamespacedName: types.NamespacedName{
Namespace: integration.Namespace,
Name: integration.Name,
},
})
}
}
}
return requests
}),
})
if err != nil {
return err
}
return nil
}
var _ reconcile.Reconciler = &ReconcileIntegration{}
// ReconcileIntegration reconciles a Integration object
type ReconcileIntegration 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 Integration object and makes changes based on the state read
// and what is in the Integration.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 *ReconcileIntegration) Reconcile(request reconcile.Request) (reconcile.Result, error) {
rlog := Log.WithValues("request-namespace", request.Namespace, "request-name", request.Name)
rlog.Info("Reconciling Integration")
ctx := context.TODO()
// Fetch the Integration instance
instance := &v1alpha1.Integration{}
err := r.client.Get(ctx, 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
}
integrationActionPool := []Action{
NewInitializeAction(),
NewBuildContextAction(),
NewDeployAction(),
NewMonitorAction(),
NewDeleteAction(),
}
// Delete phase
if instance.GetDeletionTimestamp() != nil {
instance.Status.Phase = v1alpha1.IntegrationPhaseDeleting
}
ilog := rlog.ForIntegration(instance)
for _, a := range integrationActionPool {
a.InjectClient(r.client)
a.InjectLogger(ilog)
if a.CanHandle(instance) {
ilog.Infof("Invoking action %s", a.Name())
if err := a.Handle(ctx, instance); err != nil {
if k8serrors.IsConflict(err) {
ilog.Error(err, "conflict")
return reconcile.Result{
Requeue: true,
}, nil
}
return reconcile.Result{}, err
}
}
}
return reconcile.Result{}, nil
}