To implement network containerized services in ns3, it requires behavior of containers and their network where services are deployed in containers for simulation in ns3 environment. This is similar to Docker or Kubernetes which manages containerized applications. Here the step provided for implementing the network containerized services which involve in ns3.
Step-by-step guide to implement network containerized services in ns3:
Step 1: Set Up ns3 Environment
- Download ns3: Download ns3
- Install ns3: Follow the installation instructions for the operating system.
- Familiarize with ns3 basics: Understand how to create nodes, set up channels, and run basic simulations.
Step 2: Define Network Topology
Create a network topology where nodes represent servers or virtual machines that run containerized services.
#include “ns3/core-module.h”
#include “ns3/network-module.h”
#include “ns3/internet-module.h”
#include “ns3/point-to-point-module.h”
#include “ns3/applications-module.h”
using namespace ns3;
NS_LOG_COMPONENT_DEFINE(“ContainerizedServicesSimulation”);
int main(int argc, char *argv[])
{
CommandLine cmd;
cmd.Parse(argc, argv);
// Create nodes
NodeContainer nodes;
nodes.Create(4); // Create 4 nodes representing servers
// Create point-to-point links
PointToPointHelper pointToPoint;
pointToPoint.SetDeviceAttribute(“DataRate”, StringValue(“10Mbps”));
pointToPoint.SetChannelAttribute(“Delay”, StringValue(“2ms”));
NetDeviceContainer devices;
for (uint32_t i = 0; i < nodes.GetN() – 1; ++i)
{
devices.Add(pointToPoint.Install(nodes.Get(i), nodes.Get(i + 1)));
}
// Install internet stack
InternetStackHelper stack;
stack.Install(nodes);
// Assign IP addresses
Ipv4AddressHelper address;
address.SetBase(“10.1.1.0”, “255.255.255.0”);
Ipv4InterfaceContainer interfaces = address.Assign(devices);
// Schedule applications and simulation
Simulator::Run();
Simulator::Destroy();
return 0;
}
Step 3: Create Containerized Service Application
To simulate containerized services, we’ll create a custom application that simulates the behavior of services running in containers, including communication between containers.
Custom Container Application
#include “ns3/application.h”
#include “ns3/socket.h”
#include “ns3/ipv4-address.h”
#include “ns3/inet-socket-address.h”
#include “ns3/log.h”
#include “ns3/random-variable-stream.h”
using namespace ns3;
class ContainerApp : public Application
{
public:
static TypeId GetTypeId()
{
static TypeId tid = TypeId(“ns3::ContainerApp”)
.SetParent<Application>()
.SetGroupName(“Tutorial”)
.AddConstructor<ContainerApp>();
return tid;
}
ContainerApp()
{
m_socket = 0;
m_port = 9;
}
void Setup(Ptr<Socket> socket, Ipv4Address peerAddress, uint16_t port)
{
m_socket = socket;
m_peerAddress = peerAddress;
m_port = port;
}
void StartApplication() override
{
m_socket->Bind();
m_socket->Connect(InetSocketAddress(m_peerAddress, m_port));
ScheduleNextPacket();
}
void StopApplication() override
{
if (m_socket)
{
m_socket->Close();
}
}
private:
void ScheduleNextPacket()
{
Simulator::Schedule(Seconds(1.0), &ContainerApp::SendPacket, this);
}
void SendPacket()
{
Ptr<Packet> packet = Create<Packet>(1024); // Simulate a packet
m_socket->Send(packet);
ScheduleNextPacket();
}
Ptr<Socket> m_socket;
Ipv4Address m_peerAddress;
uint16_t m_port;
};
// Main function
int main(int argc, char *argv[])
{
NodeContainer nodes;
nodes.Create(4); // Create 4 nodes representing servers
PointToPointHelper pointToPoint;
pointToPoint.SetDeviceAttribute(“DataRate”, StringValue(“10Mbps”));
pointToPoint.SetChannelAttribute(“Delay”, StringValue(“2ms”));
NetDeviceContainer devices;
for (uint32_t i = 0; i < nodes.GetN() – 1; ++i)
{
devices.Add(pointToPoint.Install(nodes.Get(i), nodes.Get(i + 1)));
}
InternetStackHelper stack;
stack.Install(nodes);
Ipv4AddressHelper address;
address.SetBase(“10.1.1.0”, “255.255.255.0”);
Ipv4InterfaceContainer interfaces = address.Assign(devices);
// Install container applications
for (uint32_t i = 0; i < nodes.GetN(); ++i)
{
Ptr<Socket>ns3UdpSocket=Socket::CreateSocket(nodes.Get(i), UdpSocketFactory::GetTypeId());
Ptr<ContainerApp> app = CreateObject<ContainerApp>();
app->Setup(ns3UdpSocket, interfaces.GetAddress((i + 1) % nodes.GetN()), 9);
nodes.Get(i)->AddApplication(app);
app->SetStartTime(Seconds(1.0));
app->SetStopTime(Seconds(100.0));
}
Simulator::Run();
Simulator::Destroy();
return 0;
}
Step 4: Simulate Container Orchestration
To simulate container orchestration, we can create a custom application that manages the lifecycle of containerized services, such as starting, stopping, and scaling containers based on network conditions.
Custom Orchestrator Application
#include “ns3/application.h”
#include “ns3/socket.h”
#include “ns3/ipv4-address.h”
#include “ns3/inet-socket-address.h”
#include “ns3/log.h”
#include “ns3/nstime.h”
using namespace ns3;
class OrchestratorApp : public Application
{
public:
static TypeId GetTypeId()
{
static TypeId tid = TypeId(“ns3::OrchestratorApp”)
.SetParent<Application>()
.SetGroupName(“Tutorial”)
.AddConstructor<OrchestratorApp>();
return tid;
}
OrchestratorApp()
{
m_socket = 0;
}
void Setup(Ptr<Socket> socket, std::vector<Ipv4Address> containerAddresses, uint16_t port)
{
m_socket = socket;
m_containerAddresses = containerAddresses;
m_port = port;
}
void StartApplication() override
{
m_socket->Bind();
ScheduleNextAction();
}
void StopApplication() override
{
if (m_socket)
{
m_socket->Close();
}
}
private:
void ScheduleNextAction()
{
Simulator::Schedule(Seconds(5.0), &OrchestratorApp::ManageContainers, this);
}
void ManageContainers()
{
// Example logic to start, stop, or scale containers
Ptr<Packet> packet = Create<Packet>(1024); // Simulate orchestration command
for (Ipv4Address addr : m_containerAddresses)
{
m_socket->Connect(InetSocketAddress(addr, m_port));
m_socket->Send(packet);
}
// Schedule the next orchestration action
ScheduleNextAction();
}
Ptr<Socket> m_socket;
std::vector<Ipv4Address> m_containerAddresses;
uint16_t m_port;
};
// Main function
int main(int argc, char *argv[])
{
NodeContainer nodes;
nodes.Create(4); // Create 4 nodes representing servers
PointToPointHelper pointToPoint;
pointToPoint.SetDeviceAttribute(“DataRate”, StringValue(“10Mbps”));
pointToPoint.SetChannelAttribute(“Delay”, StringValue(“2ms”));
NetDeviceContainer devices;
for (uint32_t i = 0; i < nodes.GetN() – 1; ++i)
{
devices.Add(pointToPoint.Install(nodes.Get(i), nodes.Get(i + 1)));
}
InternetStackHelper stack;
stack.Install(nodes);
Ipv4AddressHelper address;
address.SetBase(“10.1.1.0”, “255.255.255.0”);
Ipv4InterfaceContainer interfaces = address.Assign(devices);
// Install container applications
for (uint32_t i = 0; i < nodes.GetN() – 1; ++i)
{
Ptr<Socket>ns3UdpSocket=Socket::CreateSocket(nodes.Get(i), UdpSocketFactory::GetTypeId());
Ptr<ContainerApp> app = CreateObject<ContainerApp>();
app->Setup(ns3UdpSocket, interfaces.GetAddress((i + 1) % nodes.GetN()), 9);
nodes.Get(i)->AddApplication(app);
app->SetStartTime(Seconds(1.0));
app->SetStopTime(Seconds(100.0));
}
// Install Orchestrator application
Ptr<Socket>orchestratorSocket=Socket::CreateSocket(nodes.Get(3), UdpSocketFactory::GetTypeId());
Ptr<OrchestratorApp> orchestratorApp = CreateObject<OrchestratorApp>();
std::vector<Ipv4Address> containerAddresses;
for (uint32_t i = 0; i < nodes.GetN() – 1; ++i)
{
containerAddresses.push_back(interfaces.GetAddress(i));
}
orchestratorApp->Setup(orchestratorSocket, containerAddresses, 9);
nodes.Get(3)->AddApplication(orchestratorApp);
orchestratorApp->SetStartTime(Seconds(1.0));
orchestratorApp->SetStopTime(Seconds(100.0));
Simulator::Run();
Simulator::Destroy();
return 0;
}
Step 5: Evaluate the Performance
- Run the Simulation:
- Execute the simulation script and observe the behavior of containerized services and the orchestrator.
- Analyze the Results:
- Evaluate the orchestration efficiency, such as the response time to scaling actions and the overall network performance.
From this implementation of network containerized services which includes many terms that are detaily explained above. Here we have created a custom application that manages the lifecycle of containerized services such as starting, stopping, and scaling containers based on network conditions for simulation.
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