codesandtags / nginx-load-balancer-example

The idea behind is to demostrate how easy is to implement a load balancer using nginx. Also I use a tool to load the test and verify the things are working as expected.

Nginx Load Balancer Example

What is the goal in this lab?

The idea behind is to demostrate how easy is to implement a load balancer using nginx. Also I use a tool to load the test and verify the things are working as expected.

## Tools

• Load Test
• Docker Node Image
• Nginx

How to run the load test

The options to run the load test are:

• -t = seconds
• -c = number of clients I create
• --rps = request per second

Pointing to load balancer in nginx

loadtest -t 5 -c 100 --rps 100 http://localhost:80

INFO Requests: 0, requests per second: 0, mean latency: 0 ms
INFO
INFO Target URL:          http://localhost:80
INFO Max time (s):        5
INFO Concurrency level:   100
INFO Agent:               none
INFO Requests per second: 100
INFO
INFO Completed requests:  498
INFO Total errors:        0
INFO Total time:          5.005191427 s
INFO Requests per second: 99
INFO Mean latency:        8.8 ms
INFO
INFO Percentage of the requests served within a certain time
INFO   50%      7 ms
INFO   90%      15 ms
INFO   95%      18 ms
INFO   99%      27 ms
INFO  100%      46 ms (longest request)

Pointing to local server without load balancer

loadtest -t 5 -c 100 --rps 100 http://localhost:3000

INFO Requests: 0, requests per second: 0, mean latency: 0 ms
INFO
INFO Target URL:          http://localhost:3000
INFO Max time (s):        5
INFO Concurrency level:   100
INFO Agent:               none
INFO Requests per second: 100
INFO
INFO Completed requests:  499
INFO Total errors:        0
INFO Total time:          5.004102952 s
INFO Requests per second: 100
INFO Mean latency:        2.6 ms
INFO
INFO Percentage of the requests served within a certain time
INFO   50%      2 ms
INFO   90%      4 ms
INFO   95%      4 ms
INFO   99%      10 ms
INFO  100%      40 ms (longest request)