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utils.go
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utils.go
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// Copyright 2019 Copyright (c) 2019 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 logging
import (
"context"
"fmt"
"time"
"github.com/gardener/gardener/pkg/client/kubernetes"
"github.com/gardener/gardener/pkg/utils/retry"
"github.com/gardener/gardener/test/framework"
"github.com/onsi/ginkgo"
appsv1 "k8s.io/api/apps/v1"
"sigs.k8s.io/controller-runtime/pkg/client"
)
// Checks whether required logging resources are present.
// If not, probably the logging feature gate is not enabled.
func hasRequiredResources(ctx context.Context, k8sSeedClient kubernetes.Interface) (bool, error) {
fluentBit := &appsv1.DaemonSet{}
if err := k8sSeedClient.DirectClient().Get(ctx, client.ObjectKey{Namespace: garden, Name: fluentBitName}, fluentBit); err != nil {
return false, err
}
loki := &appsv1.StatefulSet{}
if err := k8sSeedClient.DirectClient().Get(ctx, client.ObjectKey{Namespace: garden, Name: lokiName}, loki); err != nil {
return false, err
}
return true, nil
}
func checkRequiredResources(ctx context.Context, k8sSeedClient kubernetes.Interface) {
isLoggingEnabled, err := hasRequiredResources(ctx, k8sSeedClient)
if !isLoggingEnabled {
message := fmt.Sprintf("Error occurred checking for required logging resources in the seed %s namespace. Ensure that the logging feature gate is enabled: %s", garden, err.Error())
ginkgo.Fail(message)
}
}
// WaitUntilLokiReceivesLogs waits until the loki instance in <lokiNamespace> receives <expected> logs from <podName>
func WaitUntilLokiReceivesLogs(ctx context.Context, f *framework.ShootFramework, lokiNamespace, podName string, expected int, client kubernetes.Interface) error {
return retry.Until(ctx, 5*time.Second, func(ctx context.Context) (done bool, err error) {
search, err := f.GetLokiLogs(ctx, lokiNamespace, podName, client)
if err != nil {
return retry.SevereError(err)
}
actual := search.Data.Stats.Summary.TotalLinesProcessed
if expected > actual {
f.Logger.Infof("Waiting to receive %d logs, currently received %d", expected, actual)
return retry.MinorError(fmt.Errorf("received only %d/%d logs", actual, expected))
} else if expected < actual {
return retry.SevereError(fmt.Errorf("expected to receive %d logs but was %d", expected, actual))
}
f.Logger.Infof("Received all of %d logs", actual)
return retry.Ok()
})
}