Drop unreleased features (record & replay) (#1406)

1. The records are stored in redis which is not migratable to another cluster for the testing purposes.
2. Some of the requests fields are not recorded.
3. People should consider using https://github.com/buger/goreplay which is an existing mature and well-tested solution for testing purposes.

pkg/router/functionHandler.go

@@ -40,7 +40,6 @@ import (
 	ferror "github.com/fission/fission/pkg/error"
 	"github.com/fission/fission/pkg/error/network"
 	executorClient "github.com/fission/fission/pkg/executor/client"
-	"github.com/fission/fission/pkg/redis"
 	"github.com/fission/fission/pkg/throttler"
 	"github.com/fission/fission/pkg/types"
 )
@@ -54,15 +53,12 @@ type (
 	functionHandler struct {
 		logger                   *zap.Logger
 		fmap                     *functionServiceMap
-		frmap                    *functionRecorderMap
-		trmap                    *triggerRecorderMap
 		executor                 *executorClient.Client
 		function                 *metav1.ObjectMeta
 		httpTrigger              *fv1.HTTPTrigger
 		functionMetadataMap      map[string]*metav1.ObjectMeta
 		fnWeightDistributionList []FunctionWeightDistribution
 		tsRoundTripperParams     *tsRoundTripperParams
-		recorderName             string
 		isDebugEnv               bool
 		svcAddrUpdateThrottler   *throttler.Throttler
 		functionTimeoutMap       map[k8stypes.UID]int
@@ -153,26 +149,6 @@ func (roundTripper RetryingRoundTripper) RoundTrip(req *http.Request) (*http.Res
 	// Set forwarded host header if not exists
 	roundTripper.addForwardedHostHeader(req)
 
-	// TODO: Keep? --> Needed for queries encoded in URL before they're stripped by the proxy
-	originalUrl := *req.URL
-
-	// Iff this request needs to be recorded, we save the body
-	var postedBody string
-	if len(roundTripper.funcHandler.recorderName) > 0 {
-		if req.ContentLength > 0 {
-			p := make([]byte, req.ContentLength)
-			buf, _ := ioutil.ReadAll(req.Body)
-			// We need two io readers because a single reader will drain the buffer, hence we keep a replacement copy
-			rdr1 := ioutil.NopCloser(bytes.NewBuffer(buf))
-			rdr2 := ioutil.NopCloser(bytes.NewBuffer(buf))
-
-			rdr1.Read(p)
-			postedBody = string(p)
-			roundTripper.logger.Debug("roundtripper posted body", zap.String("body", postedBody))
-			req.Body = rdr2
-		}
-	}
-
 	fnMeta := roundTripper.funcHandler.function
 
 	// Metrics stuff
@@ -315,22 +291,6 @@ func (roundTripper RetryingRoundTripper) RoundTrip(req *http.Request) (*http.Res
 			functionCallCompleted(funcMetricLabels, httpMetricLabels,
 				overhead, time.Since(startTime), resp.ContentLength)
 
-			if len(roundTripper.funcHandler.recorderName) > 0 {
-				if roundTripper.funcHandler.httpTrigger != nil {
-					trigger := roundTripper.funcHandler.httpTrigger.Metadata.Name
-					redis.Record(
-						roundTripper.logger,
-						trigger,
-						roundTripper.funcHandler.recorderName,
-						req.Header.Get("X-Fission-ReqUID"), req, originalUrl, postedBody, resp, fnMeta.Namespace,
-						time.Now().UnixNano(),
-					)
-				} else {
-					roundTripper.logger.Error("no http trigger attached for recorder",
-						zap.String("recorder", roundTripper.funcHandler.recorderName))
-				}
-			}
-
 			// return response back to user
 			return resp, nil
 		} else if i >= roundTripper.funcHandler.tsRoundTripperParams.maxRetries-1 {
@@ -435,9 +395,6 @@ func (fh functionHandler) handler(responseWriter http.ResponseWriter, request *h
 		fh.logger.Debug("chosen function backend's metadata", zap.Any("metadata", fh.function))
 	}
 
-	// set record id
-	setRecordRequestIDHeader(fh.recorderName, request)
-
 	// url path
 	setPathInfoToHeader(request)