Chore(network-chaos): Add jitter in pod-network-latency experiment (#478)

Signed-off-by: uditgaurav <[email protected]>

Author: uditgaurav

chaoslib/litmus/network-chaos/lib/latency/latency.go

@@ -12,6 +12,6 @@ import (
 //PodNetworkLatencyChaos contains the steps to prepare and inject chaos
 func PodNetworkLatencyChaos(experimentsDetails *experimentTypes.ExperimentDetails, clients clients.ClientSets, resultDetails *types.ResultDetails, eventsDetails *types.EventDetails, chaosDetails *types.ChaosDetails) error {
 
-	args := "delay " + strconv.Itoa(experimentsDetails.NetworkLatency) + "ms"
+	args := "delay " + strconv.Itoa(experimentsDetails.NetworkLatency) + "ms " + strconv.Itoa(experimentsDetails.Jitter) + "ms"
 	return network_chaos.PrepareAndInjectChaos(experimentsDetails, clients, resultDetails, eventsDetails, chaosDetails, args)
 }

pkg/generic/network-chaos/environment/environment.go

@@ -28,6 +28,7 @@ func GetENV(experimentDetails *experimentTypes.ExperimentDetails) {
 	experimentDetails.NetworkLatency, _ = strconv.Atoi(types.Getenv("NETWORK_LATENCY", "60000"))
 	experimentDetails.NetworkPacketLossPercentage, _ = strconv.Atoi(types.Getenv("NETWORK_PACKET_LOSS_PERCENTAGE", "100"))
 	experimentDetails.NetworkPacketCorruptionPercentage, _ = strconv.Atoi(types.Getenv("NETWORK_PACKET_CORRUPTION_PERCENTAGE", "100"))
+	experimentDetails.Jitter, _ = strconv.Atoi(types.Getenv("JITTER", "0"))
 	experimentDetails.NetworkInterface = types.Getenv("NETWORK_INTERFACE", "eth0")
 	experimentDetails.TargetContainer = types.Getenv("TARGET_CONTAINER", "")
 	experimentDetails.TCImage = types.Getenv("TC_IMAGE", "gaiadocker/iproute2")

pkg/generic/network-chaos/types/types.go

@@ -39,4 +39,5 @@ type ExperimentDetails struct {
 	SocketPath                         string
 	Sequence                           string
 	TerminationGracePeriodSeconds      int
+	Jitter                             int
 }