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Stop kubernetes log tailer gracefully #1722
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,12 +1,23 @@ | ||
| package kubetail | ||
|
|
||
| import ( | ||
| "context" | ||
| "os" | ||
| "testing" | ||
| "time" | ||
|
|
||
| "github.com/go-kit/log" | ||
| "github.com/grafana/alloy/internal/component/common/loki" | ||
| "github.com/grafana/alloy/internal/component/common/loki/positions" | ||
| "github.com/prometheus/prometheus/model/labels" | ||
| "github.com/stretchr/testify/require" | ||
| corev1 "k8s.io/api/core/v1" | ||
| metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" | ||
| "k8s.io/apimachinery/pkg/runtime" | ||
| "k8s.io/client-go/kubernetes/fake" | ||
| ) | ||
|
|
||
| // fakecorev1 "k8s.io/client-go/kubernetes/typed/core/v1/fake" | ||
| func Test_parseKubernetesLog(t *testing.T) { | ||
| tt := []struct { | ||
| inputLine string | ||
|
|
@@ -42,3 +53,78 @@ func Test_parseKubernetesLog(t *testing.T) { | |
| }) | ||
| } | ||
| } | ||
|
|
||
| // Test context cancellation. | ||
| func TestContextCancel(t *testing.T) { | ||
| logger := log.NewLogfmtLogger(os.Stdout) | ||
|
|
||
| target := NewTarget( | ||
| labels.FromStrings("t1", "t1", "t2", "t2"), | ||
| labels.FromStrings("p1", "p1", "p2", "p2"), | ||
| ) | ||
|
|
||
| pos, err := positions.New(logger, positions.Config{ | ||
| SyncPeriod: 10 * time.Second, | ||
| PositionsFile: t.TempDir() + "/positions.yml", | ||
| }) | ||
| require.NoError(t, err) | ||
|
|
||
| namespace := "alloy-test-ns" | ||
| podName := "alloy-pod1" | ||
| kubeObjects := []runtime.Object{ | ||
| &corev1.Pod{ | ||
| ObjectMeta: metav1.ObjectMeta{ | ||
| Name: podName, | ||
| Namespace: namespace, | ||
| Labels: map[string]string{ | ||
| "label1": "value1", | ||
| }, | ||
| }, | ||
| }, | ||
| } | ||
| fakeClientset := fake.NewClientset(kubeObjects...) | ||
| entries := make(chan loki.Entry) | ||
| handler := loki.NewEntryHandler(entries, func() {}) | ||
|
|
||
| task := &tailerTask{ | ||
| Options: &Options{ | ||
| Client: fakeClientset, | ||
| Handler: handler, | ||
| Positions: pos, | ||
| }, | ||
| Target: target, | ||
| } | ||
|
|
||
| ctx, cancelFunc := context.WithCancel(context.Background()) | ||
|
|
||
| tailer := newTailer(logger, task) | ||
| go tailer.Run(ctx) | ||
|
|
||
| // Let the tailer run for a bit. | ||
| time.Sleep(10 * time.Second) | ||
|
|
||
| // deletionOption := metav1.NewDeleteOptions(0) | ||
| // err = fakeClientset.CoreV1().Pods(namespace).Delete(ctx, podName, *deletionOption) | ||
| // require.NoError(t, err) | ||
|
|
||
| // fakeClientset.CoreV1().(*fakecorev1.FakeCoreV1).PrependReactor("get", "pods", func(action k8stesting.Action) (handled bool, ret runtime.Object, err error) { | ||
| // return true, &v1.Pod{}, errors.New("Error creating secret") | ||
| // }) | ||
|
|
||
| // fakeClientset.CoreV1().(*fakecorev1.FakeCoreV1).PrependReactor("logs", "alloy-pod1", func(action k8stesting.Action) (handled bool, ret runtime.Object, err error) { | ||
| // return true, &v1.Pod{}, errors.New("Error creating logs") | ||
| // }) | ||
|
|
||
| // Let the tailer run for a bit. | ||
| time.Sleep(10 * time.Second) | ||
|
|
||
| for entry := range entries { | ||
| // k8s.io/[email protected]/kubernetes/typed/core/v1/fake/fake_pod_expansion.go#GetLogs | ||
| require.Equal(t, entry.Line, "fake logs") | ||
| //TODO: Also check the targets array | ||
| } | ||
|
|
||
| cancelFunc() | ||
| } | ||
|
|
||
| // Test tailer restart. | ||
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The main problem right now is that I can't get this line to work. I'm not sure how to fake a k8s API which doesn't send any log lines.