[WIP/POC] Degraded NodePool Status Condition #1880
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| Original file line number | Diff line number | Diff line change |
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| /* | ||
| Copyright The Kubernetes Authors. | ||
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| Licensed under the Apache License, Version 2.0 (the "License"); | ||
| you may not use this file except in compliance with the License. | ||
| You may obtain a copy of the License at | ||
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| http://www.apache.org/licenses/LICENSE-2.0 | ||
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| Unless required by applicable law or agreed to in writing, software | ||
| distributed under the License is distributed on an "AS IS" BASIS, | ||
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| See the License for the specific language governing permissions and | ||
| limitations under the License. | ||
| */ | ||
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| package readiness | ||
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| import ( | ||
| "context" | ||
| "time" | ||
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| "k8s.io/apimachinery/pkg/api/equality" | ||
| "k8s.io/apimachinery/pkg/api/errors" | ||
| controllerruntime "sigs.k8s.io/controller-runtime" | ||
| "sigs.k8s.io/controller-runtime/pkg/builder" | ||
| "sigs.k8s.io/controller-runtime/pkg/client" | ||
| "sigs.k8s.io/controller-runtime/pkg/controller" | ||
| "sigs.k8s.io/controller-runtime/pkg/log" | ||
| "sigs.k8s.io/controller-runtime/pkg/manager" | ||
| "sigs.k8s.io/controller-runtime/pkg/reconcile" | ||
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| v1 "sigs.k8s.io/karpenter/pkg/apis/v1" | ||
| "sigs.k8s.io/karpenter/pkg/cloudprovider" | ||
| "sigs.k8s.io/karpenter/pkg/controllers/state" | ||
| "sigs.k8s.io/karpenter/pkg/operator/injection" | ||
| nodepoolutils "sigs.k8s.io/karpenter/pkg/utils/nodepool" | ||
| ) | ||
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| type Controller struct { | ||
| kubeClient client.Client | ||
| cloudProvider cloudprovider.CloudProvider | ||
| cluster *state.Cluster | ||
| } | ||
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| func NewController(kubeClient client.Client, cloudProvider cloudprovider.CloudProvider, cluster *state.Cluster) *Controller { | ||
| return &Controller{ | ||
| kubeClient: kubeClient, | ||
| cloudProvider: cloudProvider, | ||
| cluster: cluster, | ||
| } | ||
| } | ||
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| func (c *Controller) Reconcile(ctx context.Context, nodePool *v1.NodePool) (reconcile.Result, error) { | ||
| ctx = injection.WithControllerName(ctx, "nodepool.degraded") | ||
| stored := nodePool.DeepCopy() | ||
| nodePool.StatusConditions().SetUnknown(v1.ConditionTypeStable) | ||
| score, scored := c.cluster.NodePoolLaunchesFor(string(nodePool.UID)).Evaluate() | ||
| if !scored { | ||
| // no-op for an evaluation that doesn't exist | ||
| return reconcile.Result{RequeueAfter: 1 * time.Minute}, nil | ||
| } | ||
| if score < 0 { | ||
| nodePool.StatusConditions().SetFalse(v1.ConditionTypeStable, "unhealthy", "") | ||
| } else if score > 0 { | ||
| nodePool.StatusConditions().SetTrue(v1.ConditionTypeStable) | ||
| } | ||
| if !equality.Semantic.DeepEqual(stored, nodePool) { | ||
| if err := c.kubeClient.Status().Patch(ctx, nodePool, client.MergeFromWithOptions(stored, client.MergeFromWithOptimisticLock{})); err != nil { | ||
| if errors.IsConflict(err) { | ||
| return reconcile.Result{Requeue: true}, nil | ||
| } | ||
| return reconcile.Result{}, client.IgnoreNotFound(err) | ||
| } | ||
| } | ||
| log.FromContext(ctx).WithValues("score: ", score).Info("end of rec loop") | ||
| return reconcile.Result{RequeueAfter: 1 * time.Minute}, nil | ||
| } | ||
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| func (c *Controller) Register(_ context.Context, m manager.Manager) error { | ||
| return controllerruntime.NewControllerManagedBy(m). | ||
| Named("nodepool.degraded"). | ||
| For(&v1.NodePool{}, builder.WithPredicates(nodepoolutils.IsManagedPredicateFuncs(c.cloudProvider))). | ||
| WithOptions(controller.Options{MaxConcurrentReconciles: 10}). | ||
| Complete(reconcile.AsReconciler(m.GetClient(), c)) | ||
| } |
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Should we propose this change as an RFC? There seems to be a bunch of detail around what this status condition means, how we are going to track failures, what it means with respect to scheduling, etc. and I think it would be good to let people see this and get cloudprovder input as well
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I'm writing the RFC today and I should be able to post tomorrow.