springboot-performance-simulator

A test SpringBoot app to simulate performance by inducing latency, spiking memory usage, creating errors, etc and deploy on PCF (PAS)

Rest end-points to simulate test

Simulate latency

(0 ms) <//adperformancesimulator.apps.myenv.com>/simulate/delay
(1000 ms) <//adperformancesimulator.apps.myenv.com>/simulate/delay/1000
(random delay) <//adperformancesimulator.apps.myenv.com>/simulate/randomdelay

Simulate error, to log errors and can be useful to test scalability of log flow

<//adperformancesimulator.apps.myenv.com>/simulate/error

Simulate memory, to push app's memory usage in MB

(1 MB) <//adperformancesimulator.apps.myenv.com>/simulate/memory
(5 MB) <//adperformancesimulator.apps.myenv.com>/simulate/memory/5

Simulate cpu usage, to increase app's CPU usage

<//adperformancesimulator.apps.myenv.com>/simulate/cpu/30 where 30 is no. of iterations of Fibonacci series.
- <//adperformancesimulator.apps.myenv.com>/simulate/cpu for 10 iterations Observed that it can take more than 35 secs to complete one request with 100 iterations, hence limited max iterations to 75. For any input above 75, iteration will be reset to 75.

Simulate app health check issue

Include in manifest.yml, health-check-invocation-timeout in sec

health-check-invocation-timeout: 10

Push app using cf7 (CF V3 API)

cd springboot-performance-simulator
cf7 push --vars-file=vars-myenv.yml

Say you configured, 10 sec timeout for your app health endpoint latency

To simulate latency, first hit with say 15 sec latency
- <//adperformancesimulator.apps.myenv.com>/health/15
This will ensure that <//adperformancesimulator.apps.myenv.com>/health also responds after 15 secs. At this point, expect application to crash

If you changed default health latency and want to reset to normal, hit below URL
- <//adperformancesimulator.apps.myenv.com>/health/0

Next > Customize PCF Metrics 1.6.x

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