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Application resiliency using netflix hystrix

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Senthilkumar Gopal
Senthilkumar Gopal

My presentation on need for resiliency and how to achieve using Netflix Hystrix. This was received well across the team and uploading for the sake of others

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Hystrix why resiliency?
Agenda ❏ What is Resiliency? ❏ Why we need Resiliency? ❏ What is Hystrix ❏ Not a silver bullet ❏ How to use ❏ What you get and don’t ❏ What’s next
What is Resiliency? Resiliency is the ability to provide and maintain an acceptable level of service in the face of faults and challenges to normal operation.” Threats and challenges for services can range from simple misconfiguration over large scale natural disasters to targeted attacks.
Why we need Resiliency?
What is Hystrix? Hystrix is a latency and fault tolerance library designed to isolate points of access to remote systems, services and 3rd party libraries, stop cascading failure and enable resilience in complex distributed systems where failure is inevitable.
Not a silver bullet More like a Gauge & Circuit breaker, Rather than a pipeline, Certainly NOT the Thor’s Hammer
public class CommandHelloWorld extends HystrixCommand<String> { private final String name; public CommandHelloWorld(String name) { super(HystrixCommandGroupKey.Factory.asKey("ExampleGroup")); this.name = name; } @Override protected String run() { // a real example would do work like a network call here return "Hello " + name + "!"; } } CommandHelloWorld.execute(); How to use
How to use
How to use - Configurations Circuit Breaker ➔ circuitBreaker.enabled ➔ circuitBreaker.requestVolumeThreshold ➔ circuitBreaker.sleepWindowInMilliseconds ➔ circuitBreaker.errorThresholdPercentage ➔ circuitBreaker.forceOpen ➔ circuitBreaker.forceClosed Metrics ➔ metrics.rollingStats.timeInMilliseconds ➔ metrics.rollingStats.numBuckets ➔ metrics.rollingPercentile.enabled ➔ metrics.rollingPercentile.timeInMillisecond s ➔ metrics.rollingPercentile.numBuckets ➔ metrics.rollingPercentile.bucketSize execution.isolation.thread.timeoutInMilliseconds
What you get and don’t ➔ Real-time Dashboard ➔ Circuit Breaker ➔ Auto Mark Up / Mark Down ➔ Highly Configurable ➔ Reduced Latencies ➔ Faster responses ➔ 100% availability ➔ Magic!!!
What’s Next ➔ Aero Hystrix ➔ Use it for your dependencies ➔ Use the dashboard ➔ Checkout Turbine
Questions?

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Application resiliency using netflix hystrix

  • 2. Agenda ❏ What is Resiliency? ❏ Why we need Resiliency? ❏ What is Hystrix ❏ Not a silver bullet ❏ How to use ❏ What you get and don’t ❏ What’s next
  • 3. What is Resiliency? Resiliency is the ability to provide and maintain an acceptable level of service in the face of faults and challenges to normal operation.” Threats and challenges for services can range from simple misconfiguration over large scale natural disasters to targeted attacks.
  • 4. Why we need Resiliency?
  • 5. What is Hystrix? Hystrix is a latency and fault tolerance library designed to isolate points of access to remote systems, services and 3rd party libraries, stop cascading failure and enable resilience in complex distributed systems where failure is inevitable.
  • 6. Not a silver bullet More like a Gauge & Circuit breaker, Rather than a pipeline, Certainly NOT the Thor’s Hammer
  • 7. public class CommandHelloWorld extends HystrixCommand<String> { private final String name; public CommandHelloWorld(String name) { super(HystrixCommandGroupKey.Factory.asKey("ExampleGroup")); this.name = name; } @Override protected String run() { // a real example would do work like a network call here return "Hello " + name + "!"; } } CommandHelloWorld.execute(); How to use
  • 9. How to use - Configurations Circuit Breaker ➔ circuitBreaker.enabled ➔ circuitBreaker.requestVolumeThreshold ➔ circuitBreaker.sleepWindowInMilliseconds ➔ circuitBreaker.errorThresholdPercentage ➔ circuitBreaker.forceOpen ➔ circuitBreaker.forceClosed Metrics ➔ metrics.rollingStats.timeInMilliseconds ➔ metrics.rollingStats.numBuckets ➔ metrics.rollingPercentile.enabled ➔ metrics.rollingPercentile.timeInMillisecond s ➔ metrics.rollingPercentile.numBuckets ➔ metrics.rollingPercentile.bucketSize execution.isolation.thread.timeoutInMilliseconds
  • 10. What you get and don’t ➔ Real-time Dashboard ➔ Circuit Breaker ➔ Auto Mark Up / Mark Down ➔ Highly Configurable ➔ Reduced Latencies ➔ Faster responses ➔ 100% availability ➔ Magic!!!
  • 11. What’s Next ➔ Aero Hystrix ➔ Use it for your dependencies ➔ Use the dashboard ➔ Checkout Turbine