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package cmd
import (
"bytes"
"context"
"net/http"
"net/http/httptest"
"os"
"strings"
"testing"
"github.com/golang/protobuf/ptypes/duration"
netPb "github.com/linkerd/linkerd2/controller/gen/common/net"
"github.com/linkerd/linkerd2/pkg/addr"
"github.com/linkerd/linkerd2/pkg/k8s"
"github.com/linkerd/linkerd2/pkg/protohttp"
metricsPb "github.com/linkerd/linkerd2/viz/metrics-api/gen/viz"
tapPb "github.com/linkerd/linkerd2/viz/tap/gen/tap"
"github.com/linkerd/linkerd2/viz/tap/pkg"
"google.golang.org/grpc/codes"
)
const targetName = "pod-666"
func busyTest(t *testing.T, output string) {
resourceType := k8s.Pod
params := pkg.TapRequestParams{
Resource: resourceType + "/" + targetName,
Scheme: "https",
Method: "GET",
Authority: "localhost",
Path: "/some/path",
}
req, err := pkg.BuildTapByResourceRequest(params)
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
event1 := pkg.CreateTapEvent(
&tapPb.TapEvent_Http{
Event: &tapPb.TapEvent_Http_RequestInit_{
RequestInit: &tapPb.TapEvent_Http_RequestInit{
Id: &tapPb.TapEvent_Http_StreamId{
Base: 1,
},
Method: &metricsPb.HttpMethod{
Type: &metricsPb.HttpMethod_Registered_{
Registered: metricsPb.HttpMethod_GET,
},
},
Scheme: &metricsPb.Scheme{
Type: &metricsPb.Scheme_Registered_{
Registered: metricsPb.Scheme_HTTPS,
},
},
Authority: params.Authority,
Path: params.Path,
Headers: &metricsPb.Headers{
Headers: []*metricsPb.Headers_Header{
{
Name: "header-name-1",
Value: &metricsPb.Headers_Header_ValueStr{
ValueStr: "header-value-str-1",
},
},
{
Name: "header-name-2",
Value: &metricsPb.Headers_Header_ValueBin{
ValueBin: []byte("header-value-bin-2"),
},
},
},
},
},
},
},
map[string]string{
"pod": "my-pod",
"tls": "true",
},
tapPb.TapEvent_OUTBOUND,
)
event2 := pkg.CreateTapEvent(
&tapPb.TapEvent_Http{
Event: &tapPb.TapEvent_Http_ResponseEnd_{
ResponseEnd: &tapPb.TapEvent_Http_ResponseEnd{
Id: &tapPb.TapEvent_Http_StreamId{
Base: 1,
},
Eos: &metricsPb.Eos{
End: &metricsPb.Eos_GrpcStatusCode{GrpcStatusCode: 666},
},
SinceRequestInit: &duration.Duration{
Seconds: 10,
},
SinceResponseInit: &duration.Duration{
Seconds: 100,
},
ResponseBytes: 1337,
Trailers: &metricsPb.Headers{
Headers: []*metricsPb.Headers_Header{
{
Name: "trailer-name",
Value: &metricsPb.Headers_Header_ValueBin{
ValueBin: []byte("header-value-bin"),
},
},
},
},
},
},
},
map[string]string{},
tapPb.TapEvent_OUTBOUND,
)
kubeAPI, err := k8s.NewFakeAPI()
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
ts := httptest.NewServer(http.HandlerFunc(
func(w http.ResponseWriter, r *http.Request) {
for _, event := range []*tapPb.TapEvent{event1, event2} {
err = protohttp.WriteProtoToHTTPResponse(w, event)
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
}
}),
)
defer ts.Close()
kubeAPI.Config.Host = ts.URL
options := newTapOptions()
options.output = output
writer := bytes.NewBufferString("")
err = requestTapByResourceFromAPI(context.Background(), writer, kubeAPI, req, options)
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
var goldenFilePath string
switch {
case options.output == wideOutput:
goldenFilePath = "testdata/tap_busy_output_wide.golden"
case options.output == jsonOutput:
goldenFilePath = "testdata/tap_busy_output_json.golden"
case strings.HasPrefix(options.output, jsonPathOutput):
goldenFilePath = "testdata/tap_busy_output_jsonpath.golden"
default:
goldenFilePath = "testdata/tap_busy_output.golden"
}
goldenFileBytes, err := os.ReadFile(goldenFilePath)
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
expectedContent := string(goldenFileBytes)
actual := writer.String()
if expectedContent != actual {
t.Fatalf("Expected function to render:\n%s\bbut got:\n%s", expectedContent, actual)
}
}
func TestRequestTapByResourceFromAPI(t *testing.T) {
ctx := context.Background()
t.Run("Should render busy response if everything went well", func(t *testing.T) {
busyTest(t, "")
})
t.Run("Should render wide busy response if everything went well", func(t *testing.T) {
busyTest(t, "wide")
})
t.Run("Should render JSON busy response if everything went well", func(t *testing.T) {
busyTest(t, "json")
})
t.Run("Should render jsonpath busy response if everything went well", func(t *testing.T) {
busyTest(t, "jsonpath={.source}")
})
t.Run("Should render empty response if no events returned", func(t *testing.T) {
resourceType := k8s.Pod
params := pkg.TapRequestParams{
Resource: resourceType + "/" + targetName,
Scheme: "https",
Method: "GET",
Authority: "localhost",
Path: "/some/path",
}
req, err := pkg.BuildTapByResourceRequest(params)
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
kubeAPI, err := k8s.NewFakeAPI()
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
ts := httptest.NewServer(http.HandlerFunc(
func(w http.ResponseWriter, r *http.Request) {}),
)
defer ts.Close()
kubeAPI.Config.Host = ts.URL
options := newTapOptions()
writer := bytes.NewBufferString("")
err = requestTapByResourceFromAPI(ctx, writer, kubeAPI, req, options)
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
goldenFileBytes, err := os.ReadFile("testdata/tap_empty_output.golden")
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
expectedContent := string(goldenFileBytes)
output := writer.String()
if expectedContent != output {
t.Fatalf("Expected function to render:\n%s\bbut got:\n%s", expectedContent, output)
}
})
t.Run("Should return error if stream returned error", func(t *testing.T) {
t.SkipNow()
resourceType := k8s.Pod
params := pkg.TapRequestParams{
Resource: resourceType + "/" + targetName,
Scheme: "https",
Method: "GET",
Authority: "localhost",
Path: "/some/path",
}
req, err := pkg.BuildTapByResourceRequest(params)
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
kubeAPI, err := k8s.NewFakeAPI()
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
options := newTapOptions()
writer := bytes.NewBufferString("")
err = requestTapByResourceFromAPI(ctx, writer, kubeAPI, req, options)
if err == nil {
t.Fatalf("Expecting error, got nothing but output [%s]", writer.String())
}
})
}
func TestEventToString(t *testing.T) {
toTapEvent := func(httpEvent *tapPb.TapEvent_Http) *tapPb.TapEvent {
streamID := &tapPb.TapEvent_Http_StreamId{
Base: 7,
Stream: 8,
}
switch httpEvent.Event.(type) {
case *tapPb.TapEvent_Http_RequestInit_:
httpEvent.GetRequestInit().Id = streamID
case *tapPb.TapEvent_Http_ResponseInit_:
httpEvent.GetResponseInit().Id = streamID
case *tapPb.TapEvent_Http_ResponseEnd_:
httpEvent.GetResponseEnd().Id = streamID
}
srcIP, _ := addr.ParsePublicIP("1.2.3.4")
destIP, _ := addr.ParsePublicIP("2.3.4.5")
return &tapPb.TapEvent{
ProxyDirection: tapPb.TapEvent_OUTBOUND,
Source: &netPb.TcpAddress{
Ip: srcIP,
Port: 5555,
},
Destination: &netPb.TcpAddress{
Ip: destIP,
Port: 6666,
},
Event: &tapPb.TapEvent_Http_{Http: httpEvent},
}
}
t.Run("Converts HTTP request init event to string", func(t *testing.T) {
event := toTapEvent(&tapPb.TapEvent_Http{
Event: &tapPb.TapEvent_Http_RequestInit_{
RequestInit: &tapPb.TapEvent_Http_RequestInit{
Method: &metricsPb.HttpMethod{
Type: &metricsPb.HttpMethod_Registered_{
Registered: metricsPb.HttpMethod_POST,
},
},
Scheme: &metricsPb.Scheme{
Type: &metricsPb.Scheme_Registered_{
Registered: metricsPb.Scheme_HTTPS,
},
},
Authority: "hello.default:7777",
Path: "/hello.v1.HelloService/Hello",
},
},
})
expectedOutput := "req id=7:8 proxy=out src=1.2.3.4:5555 dst=2.3.4.5:6666 tls= :method=POST :authority=hello.default:7777 :path=/hello.v1.HelloService/Hello"
output := renderTapEvent(event)
if output != expectedOutput {
t.Fatalf("Expecting command output to be [%s], got [%s]", expectedOutput, output)
}
})
t.Run("Converts HTTP response init event to string", func(t *testing.T) {
event := toTapEvent(&tapPb.TapEvent_Http{
Event: &tapPb.TapEvent_Http_ResponseInit_{
ResponseInit: &tapPb.TapEvent_Http_ResponseInit{
SinceRequestInit: &duration.Duration{Seconds: 9, Nanos: 999000},
HttpStatus: http.StatusOK,
},
},
})
expectedOutput := "rsp id=7:8 proxy=out src=1.2.3.4:5555 dst=2.3.4.5:6666 tls= :status=200 latency=9000999µs"
output := renderTapEvent(event)
if output != expectedOutput {
t.Fatalf("Expecting command output to be [%s], got [%s]", expectedOutput, output)
}
})
t.Run("Converts gRPC response end event to string", func(t *testing.T) {
event := toTapEvent(&tapPb.TapEvent_Http{
Event: &tapPb.TapEvent_Http_ResponseEnd_{
ResponseEnd: &tapPb.TapEvent_Http_ResponseEnd{
SinceRequestInit: &duration.Duration{Nanos: 999000},
SinceResponseInit: &duration.Duration{Nanos: 888000},
ResponseBytes: 111,
Eos: &metricsPb.Eos{
End: &metricsPb.Eos_GrpcStatusCode{GrpcStatusCode: uint32(codes.OK)},
},
},
},
})
expectedOutput := "end id=7:8 proxy=out src=1.2.3.4:5555 dst=2.3.4.5:6666 tls= grpc-status=OK duration=888µs response-length=111B"
output := renderTapEvent(event)
if output != expectedOutput {
t.Fatalf("Expecting command output to be [%s], got [%s]", expectedOutput, output)
}
})
t.Run("Converts HTTP response end event with reset error code to string", func(t *testing.T) {
event := toTapEvent(&tapPb.TapEvent_Http{
Event: &tapPb.TapEvent_Http_ResponseEnd_{
ResponseEnd: &tapPb.TapEvent_Http_ResponseEnd{
SinceRequestInit: &duration.Duration{Nanos: 999000},
SinceResponseInit: &duration.Duration{Nanos: 888000},
ResponseBytes: 111,
Eos: &metricsPb.Eos{
End: &metricsPb.Eos_ResetErrorCode{ResetErrorCode: 123},
},
},
},
})
expectedOutput := "end id=7:8 proxy=out src=1.2.3.4:5555 dst=2.3.4.5:6666 tls= reset-error=123 duration=888µs response-length=111B"
output := renderTapEvent(event)
if output != expectedOutput {
t.Fatalf("Expecting command output to be [%s], got [%s]", expectedOutput, output)
}
})
t.Run("Converts HTTP response end event with empty EOS context string", func(t *testing.T) {
event := toTapEvent(&tapPb.TapEvent_Http{
Event: &tapPb.TapEvent_Http_ResponseEnd_{
ResponseEnd: &tapPb.TapEvent_Http_ResponseEnd{
SinceRequestInit: &duration.Duration{Nanos: 999000},
SinceResponseInit: &duration.Duration{Nanos: 888000},
ResponseBytes: 111,
Eos: &metricsPb.Eos{},
},
},
})
expectedOutput := "end id=7:8 proxy=out src=1.2.3.4:5555 dst=2.3.4.5:6666 tls= duration=888µs response-length=111B"
output := renderTapEvent(event)
if output != expectedOutput {
t.Fatalf("Expecting command output to be [%s], got [%s]", expectedOutput, output)
}
})
t.Run("Converts HTTP response end event without EOS context string", func(t *testing.T) {
event := toTapEvent(&tapPb.TapEvent_Http{
Event: &tapPb.TapEvent_Http_ResponseEnd_{
ResponseEnd: &tapPb.TapEvent_Http_ResponseEnd{
SinceRequestInit: &duration.Duration{Nanos: 999000},
SinceResponseInit: &duration.Duration{Nanos: 888000},
ResponseBytes: 111,
},
},
})
expectedOutput := "end id=7:8 proxy=out src=1.2.3.4:5555 dst=2.3.4.5:6666 tls= duration=888µs response-length=111B"
output := renderTapEvent(event)
if output != expectedOutput {
t.Fatalf("Expecting command output to be [%s], got [%s]", expectedOutput, output)
}
})
t.Run("Handles unknown event types", func(t *testing.T) {
event := toTapEvent(&tapPb.TapEvent_Http{})
expectedOutput := "unknown proxy=out src=1.2.3.4:5555 dst=2.3.4.5:6666 tls="
output := renderTapEvent(event)
if output != expectedOutput {
t.Fatalf("Expecting command output to be [%s], got [%s]", expectedOutput, output)
}
})
}