65 lines
1.9 KiB
Go
65 lines
1.9 KiB
Go
// Copyright 2020-2021 the Pinniped contributors. All Rights Reserved.
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// SPDX-License-Identifier: Apache-2.0
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package library
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import (
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"bufio"
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"context"
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"fmt"
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"testing"
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"time"
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"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/require"
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corev1 "k8s.io/api/core/v1"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/client-go/kubernetes"
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)
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// DumpLogs is meant to be called in a `defer` to dump the logs of components in the cluster on a test failure.
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func DumpLogs(t *testing.T, namespace string, labelSelector string) {
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// Only trigger on failed tests.
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if !t.Failed() {
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return
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}
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kubeClient := NewKubernetesClientset(t)
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ctx, cancel := context.WithTimeout(context.Background(), time.Minute)
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defer cancel()
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pods, err := kubeClient.CoreV1().Pods(namespace).List(ctx, metav1.ListOptions{LabelSelector: labelSelector})
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require.NoError(t, err)
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for _, pod := range pods.Items {
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for _, container := range pod.Status.ContainerStatuses {
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if container.RestartCount > 0 {
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dumpContainerLogs(ctx, t, kubeClient, pod.Namespace, pod.Name, container.Name, true)
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}
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dumpContainerLogs(ctx, t, kubeClient, pod.Namespace, pod.Name, container.Name, false)
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}
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}
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}
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func dumpContainerLogs(ctx context.Context, t *testing.T, kubeClient kubernetes.Interface, namespace, pod, container string, prev bool) {
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logTailLines := int64(40)
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shortName := fmt.Sprintf("%s/%s/%s", namespace, pod, container)
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logReader, err := kubeClient.CoreV1().Pods(namespace).GetLogs(pod, &corev1.PodLogOptions{
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Container: container,
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TailLines: &logTailLines,
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Previous: prev,
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}).Stream(ctx)
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if !assert.NoErrorf(t, err, "failed to stream logs for container %s", shortName) {
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return
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}
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scanner := bufio.NewScanner(logReader)
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for scanner.Scan() {
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prefix := shortName
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if prev {
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prefix += " (previous)"
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}
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t.Logf("%s > %s", prefix, scanner.Text())
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}
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assert.NoError(t, scanner.Err(), "failed to read logs from container %s", shortName)
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}
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