[endpoint] - Add more info in audit log

staging/src/k8s.io/apiserver/pkg/endpoints/filters/ddog.go

@@ -0,0 +1,45 @@
+/*
+Copyright 2019 The Kubernetes Authors.
+
+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 filters
+
+import (
+	"crypto/tls"
+	"k8s.io/apiserver/pkg/audit"
+	"net/http"
+)
+
+// WithDDOGAudits adds additional information about the request to the audit logs.
+// This is useful for debugging and troubleshooting.
+// TLS Cipher for fips
+// Content-Type of the response to track JSON vs protobuf
+func WithDDOGAudits(handler http.Handler) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
+		ctx := req.Context()
+
+		// Set the content type annotation if it is set
+		if _, ok := w.Header()["Content-Type"]; ok {
+			audit.AddAuditAnnotation(ctx, "audit.datadoghq.com/contentType", w.Header().Get("Content-Type"))
+		}
+
+		// Set the TLS Cipher annotation if cipher is set
+		if &req.TLS.CipherSuite != nil && req.TLS.CipherSuite > 0 {
+			audit.AddAuditAnnotation(ctx, "audit.datadoghq.com/cipher", tls.CipherSuiteName(req.TLS.CipherSuite))
+		}
+
+		handler.ServeHTTP(w, req)
+	})
+}

staging/src/k8s.io/apiserver/pkg/server/config.go

@@ -1069,6 +1069,7 @@ func DefaultBuildHandlerChain(apiHandler http.Handler, c *Config) http.Handler {
 	handler = genericapifilters.WithMuxAndDiscoveryComplete(handler, c.lifecycleSignals.MuxAndDiscoveryComplete.Signaled())
 	handler = genericfilters.WithPanicRecovery(handler, c.RequestInfoResolver)
 	handler = genericapifilters.WithAuditInit(handler)
+	handler = genericapifilters.WithDDOGAudits(handler)
 	return handler
 }