mirror of https://github.com/knative/client.git
101 lines
3.4 KiB
Go
101 lines
3.4 KiB
Go
/*
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Copyright 2020 The Knative Authors
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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https://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package reconciler
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import (
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"context"
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"reflect"
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"time"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"knative.dev/pkg/apis"
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duckv1 "knative.dev/pkg/apis/duck/v1"
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"knative.dev/pkg/logging"
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)
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const failedGenerationBump = "NewObservedGenFailure"
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const (
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DoReconcileKind = "ReconcileKind"
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DoFinalizeKind = "FinalizeKind"
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DoObserveKind = "ObserveKind"
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DoObserveFinalizeKind = "ObserveFinalizeKind"
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)
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// PreProcessReconcile contains logic to apply before reconciliation of a resource.
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func PreProcessReconcile(ctx context.Context, resource duckv1.KRShaped) {
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newStatus := resource.GetStatus()
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// We may be reading a version of the object that was stored at an older version
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// and may not have had all of the assumed defaults specified. This won't result
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// in this getting written back to the API Server, but lets downstream logic make
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// assumptions about defaulting.
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if d, ok := resource.(apis.Defaultable); ok {
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d.SetDefaults(ctx)
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}
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// Ensure conditions are initialized before we modify.
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condSet := resource.GetConditionSet()
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manager := condSet.Manage(newStatus)
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manager.InitializeConditions()
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if newStatus.ObservedGeneration != resource.GetGeneration() {
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// Reset Ready/Successful to unknown. The reconciler is expected to overwrite this.
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manager.MarkUnknown(condSet.GetTopLevelConditionType(), failedGenerationBump, "unsuccessfully observed a new generation")
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}
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}
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// PostProcessReconcile contains logic to apply after reconciliation of a resource.
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func PostProcessReconcile(ctx context.Context, resource, oldResource duckv1.KRShaped) {
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logger := logging.FromContext(ctx)
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status := resource.GetStatus()
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mgr := resource.GetConditionSet().Manage(status)
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// Bump observed generation to denote that we have processed this
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// generation regardless of success or failure.
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status.ObservedGeneration = resource.GetGeneration()
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if rc := mgr.GetTopLevelCondition(); rc == nil {
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logger.Warn("A reconciliation included no top-level condition")
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} else if rc.Reason == failedGenerationBump {
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logger.Warn("A reconciler observed a new generation without updating the resource status")
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}
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groomConditionsTransitionTime(resource, oldResource)
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}
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// groomConditionsTransitionTime ensures that the LastTransitionTime only advances for resources
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// where the condition has changed during reconciliation. This also ensures that all advanced
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// conditions share the same timestamp.
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func groomConditionsTransitionTime(resource, oldResource duckv1.KRShaped) {
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now := apis.VolatileTime{Inner: metav1.NewTime(time.Now())}
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sts := resource.GetStatus()
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for i := range sts.Conditions {
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cond := &sts.Conditions[i]
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if oldCond := oldResource.GetStatus().GetCondition(cond.Type); oldCond != nil {
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cond.LastTransitionTime = oldCond.LastTransitionTime
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if reflect.DeepEqual(cond, oldCond) {
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continue
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}
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}
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cond.LastTransitionTime = now
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}
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}
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