123 lines
4.0 KiB
Go
123 lines
4.0 KiB
Go
/*
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Copyright 2023 The Flux 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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http://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 reconcile
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import (
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"context"
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"strings"
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corev1 "k8s.io/api/core/v1"
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apierrutil "k8s.io/apimachinery/pkg/util/errors"
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"k8s.io/client-go/tools/record"
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"github.com/fluxcd/pkg/apis/meta"
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"github.com/fluxcd/pkg/runtime/conditions"
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"github.com/fluxcd/pkg/ssa"
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"github.com/fluxcd/pkg/ssa/jsondiff"
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v2 "github.com/fluxcd/helm-controller/api/v2beta2"
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"github.com/fluxcd/helm-controller/internal/action"
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)
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// CorrectClusterDrift is a reconciler that attempts to correct the cluster state
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// of a Helm release. It does so by applying the Helm release's desired state
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// to the cluster based on a jsondiff.DiffSet.
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//
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// The reconciler will only attempt to correct the cluster state if the Helm
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// release has drift detection enabled and the jsondiff.DiffSet is not empty.
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//
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// The reconciler will emit a Kubernetes event upon completion indicating
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// whether the cluster state was successfully corrected or not.
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type CorrectClusterDrift struct {
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configFactory *action.ConfigFactory
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eventRecorder record.EventRecorder
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diff jsondiff.DiffSet
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fieldManager string
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}
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func NewCorrectClusterDrift(configFactory *action.ConfigFactory, recorder record.EventRecorder, diff jsondiff.DiffSet, fieldManager string) *CorrectClusterDrift {
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return &CorrectClusterDrift{
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configFactory: configFactory,
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eventRecorder: recorder,
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diff: diff,
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fieldManager: fieldManager,
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}
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}
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func (r *CorrectClusterDrift) Reconcile(ctx context.Context, req *Request) error {
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if req.Object.GetDriftDetection().GetMode() != v2.DriftDetectionEnabled || len(r.diff) == 0 {
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return nil
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}
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ctx, cancel := context.WithTimeout(ctx, req.Object.GetTimeout().Duration)
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defer cancel()
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// Update condition to reflect the current status.
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conditions.MarkUnknown(req.Object, meta.ReadyCondition, meta.ProgressingReason, "correcting cluster drift")
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changeSet, err := action.ApplyDiff(ctx, r.configFactory.Build(nil), r.diff, r.fieldManager)
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r.report(req.Object, changeSet, err)
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return nil
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}
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func (r *CorrectClusterDrift) report(obj *v2.HelmRelease, changeSet *ssa.ChangeSet, err error) {
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cur := obj.Status.History.Latest()
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switch {
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case err != nil:
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var sb strings.Builder
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sb.WriteString("Failed to ")
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if changeSet != nil && len(changeSet.Entries) > 0 {
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sb.WriteString("partially ")
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}
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sb.WriteString("correct cluster state of release ")
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sb.WriteString(cur.FullReleaseName())
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sb.WriteString(":\n")
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if agErr, ok := err.(apierrutil.Aggregate); ok {
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for i := range agErr.Errors() {
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if i > 0 {
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sb.WriteString("\n")
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}
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sb.WriteString(agErr.Errors()[i].Error())
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}
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} else {
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sb.WriteString(err.Error())
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}
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if changeSet != nil && len(changeSet.Entries) > 0 {
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sb.WriteString("\n\n")
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sb.WriteString("Successful corrections:\n")
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sb.WriteString(changeSet.String())
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}
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r.eventRecorder.AnnotatedEventf(obj, eventMeta(cur.ChartVersion, cur.ConfigDigest, addOCIDigest(cur.OCIDigest)), corev1.EventTypeWarning,
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"DriftCorrectionFailed", sb.String())
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case changeSet != nil && len(changeSet.Entries) > 0:
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r.eventRecorder.AnnotatedEventf(obj, eventMeta(cur.ChartVersion, cur.ConfigDigest, addOCIDigest(cur.OCIDigest)), corev1.EventTypeNormal,
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"DriftCorrected", "Cluster state of release %s has been corrected:\n%s",
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obj.Status.History.Latest().FullReleaseName(), changeSet.String())
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}
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}
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func (r *CorrectClusterDrift) Name() string {
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return "correct cluster drift"
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}
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func (r *CorrectClusterDrift) Type() ReconcilerType {
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return ReconcilerTypeDriftCorrection
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}
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