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health.go
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health.go
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// Copyright (c) 2021 SAP SE or an SAP affiliate company. All rights reserved. This file is licensed under the Apache Software License, v. 2 except as noted otherwise in the LICENSE file
//
// 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 health
import (
"fmt"
landscaperv1alpha1 "github.com/gardener/landscaper/apis/core/v1alpha1"
landscaperv1alpha1helper "github.com/gardener/landscaper/apis/core/v1alpha1/helper"
)
var (
installationConditionTypesTrue = []landscaperv1alpha1.ConditionType{
landscaperv1alpha1.EnsureSubInstallationsCondition,
landscaperv1alpha1.ReconcileExecutionCondition,
landscaperv1alpha1.CreateImportsCondition,
landscaperv1alpha1.CreateExportsCondition,
landscaperv1alpha1.EnsureExecutionsCondition,
landscaperv1alpha1.ValidateExportCondition,
}
installationConditionTypesFalse = []landscaperv1alpha1.ConditionType{
landscaperv1alpha1.ValidateImportsCondition,
}
)
// CheckInstallation checks if the given Installation is healthy
// An installation is healthy if
// * Its observed generation is up-to-date
// * No annotation landscaper.gardener.cloud/operation is set
// * No lastError is in the status
// * A last operation is state succeeded is present
// * landscaperv1alpha1.ComponentPhaseSucceeded
func CheckInstallation(installation *landscaperv1alpha1.Installation) error {
if installation.Status.ObservedGeneration < installation.Generation {
return fmt.Errorf("observed generation outdated (%d/%d)", installation.Status.ObservedGeneration, installation.Generation)
}
if installation.Status.LastError != nil {
return fmt.Errorf("last errors is set: %s", installation.Status.LastError.Message)
}
if installation.Status.Phase != landscaperv1alpha1.ComponentPhaseSucceeded {
return fmt.Errorf("installation phase is not suceeded, but %s", installation.Status.Phase)
}
if op, ok := installation.Annotations[landscaperv1alpha1.OperationAnnotation]; ok {
return fmt.Errorf("landscaper operation %q is not yet picked up by controller", op)
}
for _, conditionType := range installationConditionTypesTrue {
condition := landscaperv1alpha1helper.GetCondition(installation.Status.Conditions, conditionType)
if condition == nil {
// conditions vary based on what is configured in the installation
continue
}
if err := checkConditionState(string(conditionType), string(landscaperv1alpha1.ConditionTrue), string(condition.Status), condition.Reason, condition.Message); err != nil {
return err
}
}
for _, conditionType := range installationConditionTypesFalse {
condition := landscaperv1alpha1helper.GetCondition(installation.Status.Conditions, conditionType)
if condition == nil {
continue
}
if err := checkConditionState(string(conditionType), string(landscaperv1alpha1.ConditionFalse), string(condition.Status), condition.Reason, condition.Message); err != nil {
return err
}
}
return nil
}
func checkConditionState(conditionType string, expected, actual, reason, message string) error {
if expected != actual {
return fmt.Errorf("condition %q has invalid status %s (expected %s) due to %s: %s",
conditionType, actual, expected, reason, message)
}
return nil
}