mirror of
https://github.com/edgelesssys/constellation.git
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77 lines
2.3 KiB
Go
77 lines
2.3 KiB
Go
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/*
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Copyright (c) Edgeless Systems GmbH
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SPDX-License-Identifier: AGPL-3.0-only
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*/
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package sgreconciler
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import (
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"context"
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corev1 "k8s.io/api/core/v1"
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"k8s.io/apimachinery/pkg/runtime"
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"k8s.io/apimachinery/pkg/types"
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ctrl "sigs.k8s.io/controller-runtime"
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"sigs.k8s.io/controller-runtime/pkg/builder"
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"sigs.k8s.io/controller-runtime/pkg/client"
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"sigs.k8s.io/controller-runtime/pkg/event"
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"sigs.k8s.io/controller-runtime/pkg/handler"
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"sigs.k8s.io/controller-runtime/pkg/log"
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"sigs.k8s.io/controller-runtime/pkg/predicate"
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)
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// NodeJoinWatcher watches node join / leave events.
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type NodeJoinWatcher struct {
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trigger func()
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client.Client
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Scheme *runtime.Scheme
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}
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// NewNodeJoinWatcher creates a new NodeJoinWatcher.
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func NewNodeJoinWatcher(trigger func(), client client.Client, scheme *runtime.Scheme) *NodeJoinWatcher {
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return &NodeJoinWatcher{
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trigger: trigger,
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Client: client,
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Scheme: scheme,
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}
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}
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//+kubebuilder:rbac:groups="",resources=nodes,verbs=get;list;watch;create;update;patch;delete
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//+kubebuilder:rbac:groups="",resources=nodes/status,verbs=get
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// Reconcile reconciles node join / leave events.
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func (w *NodeJoinWatcher) Reconcile(ctx context.Context, req ctrl.Request) (ctrl.Result, error) {
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logr := log.FromContext(ctx)
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logr.Info("node has joined or left the cluster", "node", req.Name)
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w.trigger()
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return ctrl.Result{}, nil
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}
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// SetupWithManager sets up the controller with the Manager.
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func (w *NodeJoinWatcher) SetupWithManager(mgr ctrl.Manager) error {
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return ctrl.NewControllerManagedBy(mgr).
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Named("node-join-watcher").
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Watches(
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client.Object(&corev1.Node{}),
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handler.EnqueueRequestsFromMapFunc(func(ctx context.Context, obj client.Object) []ctrl.Request {
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return []ctrl.Request{{
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NamespacedName: types.NamespacedName{Name: obj.GetName()},
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}}
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}),
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builder.WithPredicates(nodeJoinLeavePredicate()),
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).
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Complete(w)
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}
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// nodeJoinLeavePredicate returns a predicate that returns true if a node joins or leaves the cluster.
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func nodeJoinLeavePredicate() predicate.Predicate {
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return predicate.Funcs{
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// CreateFunc is not specified => never filter out create events
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// DeleteFunc is not specified => never filter out delete events
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UpdateFunc: func(e event.UpdateEvent) bool { return false },
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GenericFunc: func(e event.GenericEvent) bool { return false },
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}
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}
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