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predictor.go
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predictor.go
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// Copyright 2023 Flant JSC
//
// 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
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// 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.
package release
import (
"time"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"github.com/deckhouse/deckhouse/deckhouse-controller/pkg/apis/deckhouse.io/v1alpha1"
)
type releasePredictor struct {
ts metav1.Time
releases []*v1alpha1.ModuleRelease
currentReleaseIndex int
desiredReleaseIndex int
skippedPatchesIndexes []int
}
func newReleasePredictor(releases []*v1alpha1.ModuleRelease) *releasePredictor {
return &releasePredictor{
ts: metav1.NewTime(time.Now().UTC()),
releases: releases,
currentReleaseIndex: -1,
desiredReleaseIndex: -1,
skippedPatchesIndexes: make([]int, 0),
}
}
func (rp *releasePredictor) calculateRelease() {
for index, rl := range rp.releases {
if rl.Status.Phase == v1alpha1.PhaseDeployed {
rp.currentReleaseIndex = index
break
}
}
for index, rl := range rp.releases {
if rl.Status.Phase == v1alpha1.PhasePending {
if rp.desiredReleaseIndex >= 0 {
previousPredictedRelease := rp.releases[rp.desiredReleaseIndex]
if previousPredictedRelease.Spec.Version.Major() != rl.Spec.Version.Major() {
continue
}
if previousPredictedRelease.Spec.Version.Minor() != rl.Spec.Version.Minor() {
continue
}
// it's a patch for predicted release, continue
rp.skippedPatchesIndexes = append(rp.skippedPatchesIndexes, rp.desiredReleaseIndex)
}
// if we have a deployed a release
if rp.currentReleaseIndex >= 0 {
// if deployed version is greater than the pending one, this pending release should be superseded
if rp.releases[rp.currentReleaseIndex].Spec.Version.GreaterThan(rl.Spec.Version) {
rp.skippedPatchesIndexes = append(rp.skippedPatchesIndexes, index)
continue
}
}
// in other cases we have a new desired version of a module
rp.desiredReleaseIndex = index
}
}
}