LALB

HotFunctions

A simple FaaS framework and tools to test performance of load balancing algorithms. Consists of 5 parts like described in below:

• Worker front: Codes for the worker node to run the user functions in the Docker container.
• Load balancer: Codes for distributing requests to multiple worker nodes
• Simulator: Codes to run a simulation with load balancer
• Sample functions: Pre-defined user functions to run a simulation
• Utils: Utilities like generating simulation scenario or analyzing the result.

Run the project

Prerequisites

• Golang >= 1.13 (Since we use gomod for dependency control, at least 1.11 is required)
• Docker (Functions are running in the Docker container)

Step1: Configure a worker node (or worker nodes)

Follow the "How to run" section on worker front page.
After configuration, visit http://localhost:8222/execute?name=W1 to test worker node. (This command will execute function W1 and send you a response) Reponse would be like below:

{
	"Result": {
		"statusCode": 200,
		"body": "Hello World2998950"
	},
	"ExecutionTime": 3373,
	"InternalExecutionTime": 98,
	"Meta": {
		"ImageBuilt": true,
		"UsingPooledContainer": false,
		"UsingExistingRestContainer": false,
		"ContainerName": "hf_w1__9437_98081",
		"ImageName": "hf_w1"
	}
}

Our framework supports 30 different functions. You can see the detail of the supporting sample functions in sample functions page.

Step2: Configure a load balancer

Follow the "How to run" section on load balancer page.
After configuration, visit http://localhost:8111/execute?name=W1 to test load balancer. Note that you should not close the worker node while running the load balancer.

Load balancer will send a similar response with worker node, but additional information from load balancing will be appended to the response like below.

{
	"Result": {
		"statusCode": 200,
		"body": "Hello World2999663"
	},
	"ExecutionTime": 929,
	"InternalExecutionTime": 98,
	"Meta":{
		"ImageBuilt": false,
		"UsingPooledContainer": false,
		"UsingExistingRestContainer": false,
		"ContainerName": "hf_w1__9572_27887",
		"ImageName": "hf_w1"
	},
	"LoadBalancingInfo":{
		"WorkerNodeId": 0,
		"WorkerNodeUrl": "http://localhost:8222",
		"Algorithm": "ours",
		"AlgorithmLatency": 0.015869140625
	}
}

Step3: Run simulator and analyze result with utils

Follow the "How to run" section on simulator page. After the simulation is finished, utils for analyzing the logs are prepared on utils.