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Merge pull request #129330 from pohly/log-client-go-transport

Browse Source 
client-go/transport: structured, contextual logging

Kubernetes-commit: e07aeb7c8b52a486518f2f55ea58595ae007f3b0
This commit is contained in:
Kubernetes Publisher 2025-01-27 09:01:23 -08:00
commit f2030849e1
7 changed files with 357 additions and 133 deletions
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2
go.mod
View File

@ -9,6 +9,7 @@ godebug default=go1.23
godebug winsymlink=0
require (
github.com/go-logr/logr v1.4.2
github.com/gogo/protobuf v1.3.2
github.com/google/gnostic-models v0.6.9
github.com/google/go-cmp v0.6.0
@ -41,7 +42,6 @@ require (
github.com/davecgh/go-spew v1.1.1 // indirect
github.com/emicklei/go-restful/v3 v3.11.0 // indirect
github.com/fxamacker/cbor/v2 v2.7.0 // indirect
github.com/go-logr/logr v1.4.2 // indirect
github.com/go-openapi/jsonpointer v0.21.0 // indirect
github.com/go-openapi/jsonreference v0.20.2 // indirect
github.com/go-openapi/swag v0.23.0 // indirect

8
transport/cache.go
View File

@ -28,6 +28,7 @@ import (
utilnet "k8s.io/apimachinery/pkg/util/net"
"k8s.io/apimachinery/pkg/util/wait"
"k8s.io/client-go/tools/metrics"
"k8s.io/klog/v2"
)
// TlsTransportCache caches TLS http.RoundTrippers different configurations. The
@ -116,10 +117,13 @@ func (c *tlsTransportCache) get(config *Config) (http.RoundTripper, error) {
// If we use are reloading files, we need to handle certificate rotation properly
// TODO(jackkleeman): We can also add rotation here when config.HasCertCallback() is true
if config.TLS.ReloadTLSFiles && tlsConfig != nil && tlsConfig.GetClientCertificate != nil {
dynamicCertDialer := certRotatingDialer(tlsConfig.GetClientCertificate, dial)
// The TLS cache is a singleton, so sharing the same name for all of its
// background activity seems okay.
logger := klog.Background().WithName("tls-transport-cache")
dynamicCertDialer := certRotatingDialer(logger, tlsConfig.GetClientCertificate, dial)
tlsConfig.GetClientCertificate = dynamicCertDialer.GetClientCertificate
dial = dynamicCertDialer.connDialer.DialContext
go dynamicCertDialer.Run(DialerStopCh)
go dynamicCertDialer.run(DialerStopCh)
}
proxy := http.ProxyFromEnvironment

17
transport/cert_rotation.go
View File

@ -19,7 +19,6 @@ package transport
import (
"bytes"
"crypto/tls"
"fmt"
"reflect"
"sync"
"time"
@ -40,6 +39,7 @@ var CertCallbackRefreshDuration = 5 * time.Minute
type reloadFunc func(*tls.CertificateRequestInfo) (*tls.Certificate, error)
type dynamicClientCert struct {
logger klog.Logger
clientCert *tls.Certificate
certMtx sync.RWMutex
@ -50,8 +50,9 @@ type dynamicClientCert struct {
queue workqueue.TypedRateLimitingInterface[string]
}
func certRotatingDialer(reload reloadFunc, dial utilnet.DialFunc) *dynamicClientCert {
func certRotatingDialer(logger klog.Logger, reload reloadFunc, dial utilnet.DialFunc) *dynamicClientCert {
d := &dynamicClientCert{
logger: logger,
reload: reload,
connDialer: connrotation.NewDialer(connrotation.DialFunc(dial)),
queue: workqueue.NewTypedRateLimitingQueueWithConfig(
@ -88,7 +89,7 @@ func (c *dynamicClientCert) loadClientCert() (*tls.Certificate, error) {
return cert, nil
}
klog.V(1).Infof("certificate rotation detected, shutting down client connections to start using new credentials")
c.logger.V(1).Info("Certificate rotation detected, shutting down client connections to start using new credentials")
c.connDialer.CloseAll()
return cert, nil
@ -133,12 +134,12 @@ func byteMatrixEqual(left, right [][]byte) bool {
}
// run starts the controller and blocks until stopCh is closed.
func (c *dynamicClientCert) Run(stopCh <-chan struct{}) {
defer utilruntime.HandleCrash()
func (c *dynamicClientCert) run(stopCh <-chan struct{}) {
defer utilruntime.HandleCrashWithLogger(c.logger)
defer c.queue.ShutDown()
klog.V(3).Infof("Starting client certificate rotation controller")
defer klog.V(3).Infof("Shutting down client certificate rotation controller")
c.logger.V(3).Info("Starting client certificate rotation controller")
defer c.logger.V(3).Info("Shutting down client certificate rotation controller")
go wait.Until(c.runWorker, time.Second, stopCh)
@ -168,7 +169,7 @@ func (c *dynamicClientCert) processNextWorkItem() bool {
return true
}
utilruntime.HandleError(fmt.Errorf("%v failed with : %v", dsKey, err))
utilruntime.HandleErrorWithLogger(c.logger, err, "Loading client cert failed", "key", dsKey)
c.queue.AddRateLimited(dsKey)
return true

194
transport/round_trippers.go
View File

@ -21,10 +21,12 @@ import (
"fmt"
"net/http"
"net/http/httptrace"
"sort"
"strings"
"sync"
"time"
"github.com/go-logr/logr"
"golang.org/x/oauth2"
utilnet "k8s.io/apimachinery/pkg/util/net"
@ -68,19 +70,16 @@ func HTTPWrappersForConfig(config *Config, rt http.RoundTripper) (http.RoundTrip
return rt, nil
}
// DebugWrappers wraps a round tripper and logs based on the current log level.
// DebugWrappers potentially wraps a round tripper with a wrapper that logs
// based on the log level in the context of each individual request.
//
// At the moment, wrapping depends on the global log verbosity and is done
// if that verbosity is >= 6. This may change in the future.
func DebugWrappers(rt http.RoundTripper) http.RoundTripper {
switch {
case bool(klog.V(9).Enabled()):
rt = NewDebuggingRoundTripper(rt, DebugCurlCommand, DebugURLTiming, DebugDetailedTiming, DebugResponseHeaders)
case bool(klog.V(8).Enabled()):
rt = NewDebuggingRoundTripper(rt, DebugJustURL, DebugRequestHeaders, DebugResponseStatus, DebugResponseHeaders)
case bool(klog.V(7).Enabled()):
rt = NewDebuggingRoundTripper(rt, DebugJustURL, DebugRequestHeaders, DebugResponseStatus)
case bool(klog.V(6).Enabled()):
rt = NewDebuggingRoundTripper(rt, DebugURLTiming)
//nolint:logcheck // The actual logging is done with a different logger, so only checking here is okay.
if klog.V(6).Enabled() {
rt = NewDebuggingRoundTripper(rt, DebugByContext)
}
return rt
}
@ -380,14 +379,17 @@ func (r *requestInfo) toCurl() string {
}
}
return fmt.Sprintf("curl -v -X%s %s '%s'", r.RequestVerb, headers, r.RequestURL)
// Newline at the end makes this look better in the text log output (the
// only usage of this method) because it becomes a multi-line string with
// no quoting.
return fmt.Sprintf("curl -v -X%s %s '%s'\n", r.RequestVerb, headers, r.RequestURL)
}
// debuggingRoundTripper will display information about the requests passing
// through it based on what is configured
type debuggingRoundTripper struct {
delegatedRoundTripper http.RoundTripper
levels map[DebugLevel]bool
levels int
}
var _ utilnet.RoundTripperWrapper = &debuggingRoundTripper{}
@ -412,6 +414,26 @@ const (
DebugResponseHeaders
// DebugDetailedTiming will add to the debug output the duration of the HTTP requests events.
DebugDetailedTiming
// DebugByContext will add any of the above depending on the verbosity of the per-request logger obtained from the requests context.
//
// Can be combined in NewDebuggingRoundTripper with some of the other options, in which case the
// debug roundtripper will always log what is requested there plus the information that gets
// enabled by the context's log verbosity.
DebugByContext
)
// Different log levels include different sets of information.
//
// Not exported because the exact content of log messages is not part
// of of the package API.
const (
levelsV6 = (1 << DebugURLTiming)
// Logging *less* information for the response at level 7 compared to 6 replicates prior behavior:
// https://github.com/kubernetes/kubernetes/blob/2b472fe4690c83a2b343995f88050b2a3e9ff0fa/staging/src/k8s.io/client-go/transport/round_trippers.go#L79
// Presumably that was done because verb and URL are already in the request log entry.
levelsV7 = (1 << DebugJustURL) | (1 << DebugRequestHeaders) | (1 << DebugResponseStatus)
levelsV8 = (1 << DebugJustURL) | (1 << DebugRequestHeaders) | (1 << DebugResponseStatus) | (1 << DebugResponseHeaders)
levelsV9 = (1 << DebugCurlCommand) | (1 << DebugURLTiming) | (1 << DebugDetailedTiming) | (1 << DebugResponseHeaders)
)
// NewDebuggingRoundTripper allows to display in the logs output debug information
@ -419,10 +441,9 @@ const (
func NewDebuggingRoundTripper(rt http.RoundTripper, levels ...DebugLevel) http.RoundTripper {
drt := &debuggingRoundTripper{
delegatedRoundTripper: rt,
levels: make(map[DebugLevel]bool, len(levels)),
}
for _, v := range levels {
drt.levels[v] = true
drt.levels |= 1 << v
}
return drt
}
@ -464,27 +485,51 @@ func maskValue(key string, value string) string {
}
func (rt *debuggingRoundTripper) RoundTrip(req *http.Request) (*http.Response, error) {
logger := klog.FromContext(req.Context())
levels := rt.levels
// When logging depends on the context, it uses the verbosity of the per-context logger
// and a hard-coded mapping of verbosity to debug details. Otherwise all messages
// are logged as V(0).
if levels&(1<<DebugByContext) != 0 {
if loggerV := logger.V(9); loggerV.Enabled() {
logger = loggerV
// The curl command replaces logging of the URL.
levels |= levelsV9
} else if loggerV := logger.V(8); loggerV.Enabled() {
logger = loggerV
levels |= levelsV8
} else if loggerV := logger.V(7); loggerV.Enabled() {
logger = loggerV
levels |= levelsV7
} else if loggerV := logger.V(6); loggerV.Enabled() {
logger = loggerV
levels |= levelsV6
}
}
reqInfo := newRequestInfo(req)
if rt.levels[DebugJustURL] {
klog.Infof("%s %s", reqInfo.RequestVerb, reqInfo.RequestURL)
kvs := make([]any, 0, 8) // Exactly large enough for all appends below.
if levels&(1<<DebugJustURL) != 0 {
kvs = append(kvs,
"verb", reqInfo.RequestVerb,
"url", reqInfo.RequestURL,
)
}
if rt.levels[DebugCurlCommand] {
klog.Infof("%s", reqInfo.toCurl())
}
if rt.levels[DebugRequestHeaders] {
klog.Info("Request Headers:")
for key, values := range reqInfo.RequestHeaders {
for _, value := range values {
value = maskValue(key, value)
klog.Infof(" %s: %s", key, value)
if levels&(1<<DebugCurlCommand) != 0 {
kvs = append(kvs, "curlCommand", reqInfo.toCurl())
}
if levels&(1<<DebugRequestHeaders) != 0 {
kvs = append(kvs, "headers", newHeadersMap(reqInfo.RequestHeaders))
}
if len(kvs) > 0 {
logger.Info("Request", kvs...)
}
startTime := time.Now()
if rt.levels[DebugDetailedTiming] {
if levels&(1<<DebugDetailedTiming) != 0 {
var getConn, dnsStart, dialStart, tlsStart, serverStart time.Time
var host string
trace := &httptrace.ClientTrace{
@ -499,7 +544,7 @@ func (rt *debuggingRoundTripper) RoundTrip(req *http.Request) (*http.Response, e
reqInfo.muTrace.Lock()
defer reqInfo.muTrace.Unlock()
reqInfo.DNSLookup = time.Since(dnsStart)
klog.Infof("HTTP Trace: DNS Lookup for %s resolved to %v", host, info.Addrs)
logger.Info("HTTP Trace: DNS Lookup resolved", "host", host, "address", info.Addrs)
},
// Dial
ConnectStart: func(network, addr string) {
@ -512,9 +557,9 @@ func (rt *debuggingRoundTripper) RoundTrip(req *http.Request) (*http.Response, e
defer reqInfo.muTrace.Unlock()
reqInfo.Dialing = time.Since(dialStart)
if err != nil {
klog.Infof("HTTP Trace: Dial to %s:%s failed: %v", network, addr, err)
logger.Info("HTTP Trace: Dial failed", "network", network, "address", addr, "err", err)
} else {
klog.Infof("HTTP Trace: Dial to %s:%s succeed", network, addr)
logger.Info("HTTP Trace: Dial succeed", "network", network, "address", addr)
}
},
// TLS
@ -556,42 +601,85 @@ func (rt *debuggingRoundTripper) RoundTrip(req *http.Request) (*http.Response, e
reqInfo.complete(response, err)
if rt.levels[DebugURLTiming] {
klog.Infof("%s %s %s in %d milliseconds", reqInfo.RequestVerb, reqInfo.RequestURL, reqInfo.ResponseStatus, reqInfo.Duration.Nanoseconds()/int64(time.Millisecond))
kvs = make([]any, 0, 20) // Exactly large enough for all appends below.
if levels&(1<<DebugURLTiming) != 0 {
kvs = append(kvs, "verb", reqInfo.RequestVerb, "url", reqInfo.RequestURL)
}
if rt.levels[DebugDetailedTiming] {
stats := ""
if levels&(1<<DebugURLTiming|1<<DebugResponseStatus) != 0 {
kvs = append(kvs, "status", reqInfo.ResponseStatus)
}
if levels&(1<<DebugResponseHeaders) != 0 {
kvs = append(kvs, "headers", newHeadersMap(reqInfo.ResponseHeaders))
}
if levels&(1<<DebugURLTiming|1<<DebugDetailedTiming|1<<DebugResponseStatus) != 0 {
kvs = append(kvs, "milliseconds", reqInfo.Duration.Nanoseconds()/int64(time.Millisecond))
}
if levels&(1<<DebugDetailedTiming) != 0 {
if !reqInfo.ConnectionReused {
stats += fmt.Sprintf(`DNSLookup %d ms Dial %d ms TLSHandshake %d ms`,
reqInfo.DNSLookup.Nanoseconds()/int64(time.Millisecond),
reqInfo.Dialing.Nanoseconds()/int64(time.Millisecond),
reqInfo.TLSHandshake.Nanoseconds()/int64(time.Millisecond),
kvs = append(kvs,
"dnsLookupMilliseconds", reqInfo.DNSLookup.Nanoseconds()/int64(time.Millisecond),
"dialMilliseconds", reqInfo.Dialing.Nanoseconds()/int64(time.Millisecond),
"tlsHandshakeMilliseconds", reqInfo.TLSHandshake.Nanoseconds()/int64(time.Millisecond),
)
} else {
stats += fmt.Sprintf(`GetConnection %d ms`, reqInfo.GetConnection.Nanoseconds()/int64(time.Millisecond))
kvs = append(kvs, "getConnectionMilliseconds", reqInfo.GetConnection.Nanoseconds()/int64(time.Millisecond))
}
if reqInfo.ServerProcessing != 0 {
stats += fmt.Sprintf(` ServerProcessing %d ms`, reqInfo.ServerProcessing.Nanoseconds()/int64(time.Millisecond))
}
stats += fmt.Sprintf(` Duration %d ms`, reqInfo.Duration.Nanoseconds()/int64(time.Millisecond))
klog.Infof("HTTP Statistics: %s", stats)
}
if rt.levels[DebugResponseStatus] {
klog.Infof("Response Status: %s in %d milliseconds", reqInfo.ResponseStatus, reqInfo.Duration.Nanoseconds()/int64(time.Millisecond))
}
if rt.levels[DebugResponseHeaders] {
klog.Info("Response Headers:")
for key, values := range reqInfo.ResponseHeaders {
for _, value := range values {
klog.Infof(" %s: %s", key, value)
kvs = append(kvs, "serverProcessingMilliseconds", reqInfo.ServerProcessing.Nanoseconds()/int64(time.Millisecond))
}
}
if len(kvs) > 0 {
logger.Info("Response", kvs...)
}
return response, err
}
// headerMap formats headers sorted and across multiple lines with no quoting
// when using string output and as JSON when using zapr.
type headersMap http.Header
// newHeadersMap masks all sensitive values. This has to be done before
// passing the map to a logger because while in practice all loggers
// either use String or MarshalLog, that is not guaranteed.
func newHeadersMap(header http.Header) headersMap {
h := make(headersMap, len(header))
for key, values := range header {
maskedValues := make([]string, 0, len(values))
for _, value := range values {
maskedValues = append(maskedValues, maskValue(key, value))
}
h[key] = maskedValues
}
return h
}
var _ fmt.Stringer = headersMap{}
var _ logr.Marshaler = headersMap{}
func (h headersMap) String() string {
// The fixed size typically avoids memory allocations when it is large enough.
keys := make([]string, 0, 20)
for key := range h {
keys = append(keys, key)
}
sort.Strings(keys)
var buffer strings.Builder
for _, key := range keys {
for _, value := range h[key] {
_, _ = buffer.WriteString(key)
_, _ = buffer.WriteString(": ")
_, _ = buffer.WriteString(value)
_, _ = buffer.WriteString("\n")
}
}
return buffer.String()
}
func (h headersMap) MarshalLog() any {
return map[string][]string(h)
}
func (rt *debuggingRoundTripper) WrappedRoundTripper() http.RoundTripper {
return rt.delegatedRoundTripper
}

278
transport/round_trippers_test.go
View File

@ -18,13 +18,18 @@ package transport
import (
"bytes"
"context"
"flag"
"fmt"
"net/http"
"net/url"
"reflect"
"regexp"
"strings"
"testing"
"github.com/go-logr/logr/funcr"
"k8s.io/klog/v2"
)
@ -460,101 +465,224 @@ func TestHeaderEscapeRoundTrip(t *testing.T) {
}
}
//nolint:logcheck // Intentionally tests with global logging.
func TestDebuggingRoundTripper(t *testing.T) {
t.Parallel()
rawURL := "https://127.0.0.1:12345/api/v1/pods?limit=500"
req := &http.Request{
Method: http.MethodGet,
Header: map[string][]string{
"Authorization": {"bearer secretauthtoken"},
"X-Test-Request": {"test"},
},
}
res := &http.Response{
Status: "OK",
StatusCode: http.StatusOK,
Header: map[string][]string{
"X-Test-Response": {"test"},
},
}
tcs := []struct {
levels []DebugLevel
expectedOutputLines []string
}{
{
levels: []DebugLevel{DebugJustURL},
expectedOutputLines: []string{fmt.Sprintf("%s %s", req.Method, rawURL)},
},
{
levels: []DebugLevel{DebugRequestHeaders},
expectedOutputLines: func() []string {
lines := []string{fmt.Sprintf("Request Headers:\n")}
for key, values := range req.Header {
for _, value := range values {
if key == "Authorization" {
value = "bearer <masked>"
}
lines = append(lines, fmt.Sprintf(" %s: %s\n", key, value))
}
}
return lines
}(),
},
{
levels: []DebugLevel{DebugResponseHeaders},
expectedOutputLines: func() []string {
lines := []string{fmt.Sprintf("Response Headers:\n")}
for key, values := range res.Header {
for _, value := range values {
lines = append(lines, fmt.Sprintf(" %s: %s\n", key, value))
}
}
return lines
}(),
},
{
levels: []DebugLevel{DebugURLTiming},
expectedOutputLines: []string{fmt.Sprintf("%s %s %s", req.Method, rawURL, res.Status)},
},
{
levels: []DebugLevel{DebugResponseStatus},
expectedOutputLines: []string{fmt.Sprintf("Response Status: %s", res.Status)},
},
{
levels: []DebugLevel{DebugCurlCommand},
expectedOutputLines: []string{fmt.Sprintf("curl -v -X")},
},
}
for _, tc := range tcs {
// hijack the klog output
tmpWriteBuffer := bytes.NewBuffer(nil)
klog.SetOutput(tmpWriteBuffer)
klog.LogToStderr(false)
// parse rawURL
parsedURL, err := url.Parse(rawURL)
if err != nil {
t.Fatalf("url.Parse(%q) returned error: %v", rawURL, err)
}
req.URL = parsedURL
method := http.MethodGet
header := map[string][]string{
"Authorization": {"bearer secretauthtoken"},
"X-Test-Request": {"test"},
}
reqHeaderText := `headers=<
Authorization: bearer <masked>
X-Test-Request: test
>`
// Both can be written by funcr.
reqHeaderJSON := `"headers":{"Authorization":["bearer <masked>"],"X-Test-Request":["test"]}`
reqHeaderJSONReversed := `"headers":{"X-Test-Request":["test"],"Authorization":["bearer <masked>"]}`
res := &http.Response{
Status: "OK",
StatusCode: http.StatusOK,
Header: map[string][]string{
"X-Test-Response": {"a", "b"},
},
}
resHeaderText := `headers=<
X-Test-Response: a
X-Test-Response: b
>`
resHeaderJSON := `"headers":{"X-Test-Response":["a","b"]}`
tcs := []struct {
levels []DebugLevel
v int
expectedTextLines []string
expectedJSONLines []string
}{
{
levels: []DebugLevel{DebugJustURL},
expectedTextLines: []string{fmt.Sprintf(`"Request" verb=%q url=%q`, method, rawURL)},
expectedJSONLines: []string{fmt.Sprintf(`"msg":"Request","verb":%q,"url":%q`, method, rawURL)},
},
{
levels: []DebugLevel{DebugRequestHeaders},
expectedTextLines: []string{`"Request" ` + reqHeaderText},
expectedJSONLines: []string{`"msg":"Request",` + reqHeaderJSON},
},
{
levels: []DebugLevel{DebugResponseHeaders},
expectedTextLines: []string{`"Response" ` + resHeaderText},
expectedJSONLines: []string{`"msg":"Response",` + resHeaderJSON},
},
{
levels: []DebugLevel{DebugURLTiming},
expectedTextLines: []string{fmt.Sprintf(`"Response" verb=%q url=%q status=%q`, method, rawURL, res.Status)},
expectedJSONLines: []string{fmt.Sprintf(`"msg":"Response","verb":%q,"url":%q,"status":%q`, method, rawURL, res.Status)},
},
{
levels: []DebugLevel{DebugResponseStatus},
expectedTextLines: []string{fmt.Sprintf(`"Response" status=%q`, res.Status)},
expectedJSONLines: []string{fmt.Sprintf(`"msg":"Response","status":%q`, res.Status)},
},
{
levels: []DebugLevel{DebugCurlCommand},
expectedTextLines: []string{`curlCommand=<
curl -v -X`},
expectedJSONLines: []string{`"curlCommand":"curl -v -X`},
},
{
levels: []DebugLevel{DebugURLTiming, DebugResponseStatus},
expectedTextLines: []string{fmt.Sprintf(`"Response" verb=%q url=%q status=%q milliseconds=`, method, rawURL, res.Status)},
expectedJSONLines: []string{fmt.Sprintf(`"msg":"Response","verb":%q,"url":%q,"status":%q,"milliseconds":`, method, rawURL, res.Status)},
},
{
levels: []DebugLevel{DebugByContext},
v: 5,
},
{
levels: []DebugLevel{DebugByContext, DebugURLTiming},
v: 5,
expectedTextLines: []string{
fmt.Sprintf(`"Response" verb=%q url=%q status=%q milliseconds=`, method, rawURL, res.Status),
},
expectedJSONLines: []string{
fmt.Sprintf(`"msg":"Response","verb":%q,"url":%q,"status":%q,"milliseconds":`, method, rawURL, res.Status),
},
},
{
levels: []DebugLevel{DebugByContext},
v: 6,
expectedTextLines: []string{
fmt.Sprintf(`"Response" verb=%q url=%q status=%q milliseconds=`, method, rawURL, res.Status),
},
expectedJSONLines: []string{
fmt.Sprintf(`"msg":"Response","verb":%q,"url":%q,"status":%q,"milliseconds":`, method, rawURL, res.Status),
},
},
{
levels: []DebugLevel{DebugByContext},
v: 7,
expectedTextLines: []string{
fmt.Sprintf(`"Request" verb=%q url=%q %s
`, method, rawURL, reqHeaderText),
fmt.Sprintf(`"Response" status=%q milliseconds=`, res.Status),
},
expectedJSONLines: []string{
fmt.Sprintf(`"msg":"Request","verb":%q,"url":%q,%s`, method, rawURL, reqHeaderJSON),
fmt.Sprintf(`"msg":"Response","status":%q,"milliseconds":`, res.Status),
},
},
{
levels: []DebugLevel{DebugByContext},
v: 8,
expectedTextLines: []string{
fmt.Sprintf(`"Request" verb=%q url=%q %s
`, method, rawURL, reqHeaderText),
fmt.Sprintf(`"Response" status=%q %s milliseconds=`, res.Status, resHeaderText),
},
expectedJSONLines: []string{
fmt.Sprintf(`"msg":"Request","verb":%q,"url":%q,%s`, method, rawURL, reqHeaderJSON),
fmt.Sprintf(`"msg":"Response","status":%q,%s,"milliseconds":`, res.Status, resHeaderJSON),
},
},
{
levels: []DebugLevel{DebugByContext},
v: 9,
expectedTextLines: []string{
fmt.Sprintf(`"Request" curlCommand=<
curl -v -X%s`, method),
fmt.Sprintf(`"Response" verb=%q url=%q status=%q %s milliseconds=`, method, rawURL, res.Status, resHeaderText),
},
expectedJSONLines: []string{
fmt.Sprintf(`"msg":"Request","curlCommand":"curl -v -X%s`, method),
fmt.Sprintf(`"msg":"Response","verb":%q,"url":%q,"status":%q,%s,"milliseconds":`, method, rawURL, res.Status, resHeaderJSON),
},
},
}
for i, tc := range tcs {
t.Run(fmt.Sprintf("%d", i), func(t *testing.T) {
for _, format := range []string{"text", "JSON"} {
t.Run(format, func(t *testing.T) {
// hijack the klog output
state := klog.CaptureState()
tmpWriteBuffer := bytes.NewBuffer(nil)
klog.SetOutput(tmpWriteBuffer)
klog.LogToStderr(false)
var fs flag.FlagSet
klog.InitFlags(&fs)
if err := fs.Set("one_output", "true"); err != nil {
t.Errorf("unexpected error setting -one_output: %v", err)
}
if err := fs.Set("v", fmt.Sprintf("%d", tc.v)); err != nil {
t.Errorf("unexpected error setting -v: %v", err)
}
expectOutput := tc.expectedTextLines
var req *http.Request
if format == "JSON" {
// Logger will be picked up through the context.
logger := funcr.NewJSON(func(obj string) {
_, _ = tmpWriteBuffer.Write([]byte(obj))
_, _ = tmpWriteBuffer.Write([]byte("\n"))
}, funcr.Options{Verbosity: tc.v})
ctx := klog.NewContext(context.Background(), logger)
expectOutput = tc.expectedJSONLines
r, err := http.NewRequestWithContext(ctx, method, rawURL, nil)
if err != nil {
t.Fatalf("unexpected error constructing the HTTP request: %v", err)
}
req = r
} else {
// Intentionally no context, as before.
req = &http.Request{
Method: method,
URL: parsedURL,
}
}
req.Header = header
// execute the round tripper
rt := &testRoundTripper{
Response: res,
}
if len(tc.levels) == 1 && tc.levels[0] == DebugByContext {
DebugWrappers(rt).RoundTrip(req)
} else {
NewDebuggingRoundTripper(rt, tc.levels...).RoundTrip(req)
}
// call Flush to ensure the text isn't still buffered
klog.Flush()
// check if klog's output contains the expected lines
actual := tmpWriteBuffer.String()
for _, expected := range tc.expectedOutputLines {
// funcr writes a map in non-deterministic order.
// Fix that up before comparison.
actual = strings.ReplaceAll(actual, reqHeaderJSONReversed, reqHeaderJSON)
for _, expected := range expectOutput {
if !strings.Contains(actual, expected) {
t.Errorf("%q does not contain expected output %q", actual, expected)
t.Errorf("verbosity %d: expected this substring:\n%s\n\ngot:\n%s", tc.v, expected, actual)
}
}
// These test cases describe all expected lines. Split the log output
// into log entries and compare their number.
entries := regexp.MustCompile(`(?m)^[I{]`).FindAllStringIndex(actual, -1)
if tc.v > 0 && len(entries) != len(expectOutput) {
t.Errorf("expected %d output lines, got %d:\n%s", len(expectOutput), len(entries), actual)
}
state.Restore()
})
}
})
}
}

5
transport/token_source.go
View File

@ -182,7 +182,10 @@ func (ts *cachingTokenSource) Token() (*oauth2.Token, error) {
if ts.tok == nil {
return nil, err
}
klog.Errorf("Unable to rotate token: %v", err)
// Not using a caller-provided logger isn't ideal, but impossible to fix
// without new APIs that go up all the way to HTTPWrappersForConfig.
// This is currently deemed not worth changing (too much effort, not enough benefit).
klog.TODO().Error(err, "Unable to rotate token")
return ts.tok, nil
}

2
transport/transport.go
View File

@ -353,7 +353,7 @@ func tryCancelRequest(rt http.RoundTripper, req *http.Request) {
case utilnet.RoundTripperWrapper:
tryCancelRequest(rt.WrappedRoundTripper(), req)
default:
klog.Warningf("Unable to cancel request for %T", rt)
klog.FromContext(req.Context()).Info("Warning: unable to cancel request", "roundTripperType", fmt.Sprintf("%T", rt))
}
}