[Solved] Cloud Computing Lab 5-Load Balancing

Load Balancing

Dear Happy Vacationer

• The previous experiment was so easy that Im ashamed to even talk about it
• Now you need to do one large experiment that worths a two-week time
• This is load balancing

Goal for Lab 5

• Objectives:
• Understanding the concept of load balancing
• Monitor the utilization status of each VM and each host
• Moving VMs from hot spot to cold ones
• Complete this experiment using at least two computers, the more the better

To Start

• Go to dockerhub and pull one image call mongo-express
• https://hub.docker.com/_/mongoexpress
• Test this mongodb web service with simple SQL statement
• Hints, you can generate your own DB file on random data
• Write a HTTP request generator that wraps SQL statement
• https://sourceforge.net/projects/httpreqgen/
• https://github.com/Kong/httpsnippet

Combine Them Up

• First, connect your request generator to the MongoDB service, basically shooting different SQL statement at a self-defined rate
• Second, make multiple duplicates of the MongoDB service, and randomly distribute the SQL statement to all service hosts
• Third, based on your homework 2-3, use your hypercall to detect the runtime system status, including CPU utilization, memory utilization, etc.
• Set a threshold for such status and name it as the hotspot when it is over
• g., when CPU util > 80%, this is a hot spot, you need to either move some hosts to other machines, or distribute less workloads to this spot