/
node_controller.go
124 lines (101 loc) · 3.74 KB
/
node_controller.go
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package node
import (
"context"
"strings"
"github.com/ouzi-dev/node-tagger/pkg/constants"
"github.com/aws/aws-sdk-go/service/ec2"
"github.com/ouzi-dev/node-tagger/pkg/aws"
"github.com/ouzi-dev/node-tagger/pkg/flags"
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"
)
var log = logf.Log.WithName("controller_node")
/**
* 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 Node 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 {
reconciler, err := newReconciler(mgr)
if err != nil {
return err
}
return add(mgr, reconciler)
}
// newReconciler returns a new reconcile.Reconciler
func newReconciler(mgr manager.Manager) (reconcile.Reconciler, error) {
awsSession, err := aws.GetAwsSessionFromEnv()
if err != nil {
return nil, err
}
return &ReconcileNode{
client: mgr.GetClient(),
scheme: mgr.GetScheme(),
nodeTagger: aws.NewNodeInstanceTagger(ec2.New(awsSession)),
}, nil
}
// 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("node-controller", mgr, controller.Options{Reconciler: r})
if err != nil {
return err
}
// Watch for changes to primary resource Node
err = c.Watch(&source.Kind{Type: &corev1.Node{}}, &handler.EnqueueRequestForObject{})
if err != nil {
return err
}
return nil
}
// blank assignment to verify that ReconcileNode implements reconcile.Reconciler
var _ reconcile.Reconciler = &ReconcileNode{}
// ReconcileNode reconciles a Node object
type ReconcileNode 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
nodeTagger aws.NodeTagger
}
// Reconcile reads that state of the cluster for a Node object and adds tags to the underlying instances if necessary
// 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 *ReconcileNode) Reconcile(request reconcile.Request) (reconcile.Result, error) {
reqLogger := log.WithValues("Node.Name", request.Name)
reqLogger.Info("Reconciling Node")
// Fetch the Node instance
instance := &corev1.Node{}
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
}
// Node is not an aws one so skip it. Return and don't requeue
if !isAwsNode(instance) {
reqLogger.V(constants.DebugLogVerbosity).Info("Node is not an AWS node. Skipping")
return reconcile.Result{}, nil
}
err = r.nodeTagger.EnsureInstanceNodeHasTags(instance, flags.InstanceTags)
if err != nil {
return reconcile.Result{}, err
}
return reconcile.Result{}, nil
}
func isAwsNode(node *corev1.Node) bool {
return strings.HasPrefix(node.Spec.ProviderID, "aws")
}