Peering Inside the Black Box: A Case for Observability
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The document discusses observability in Java applications, emphasizing the importance of tracing, metrics, and logs to monitor service performance and resource usage. It highlights OpenTelemetry as a standardized solution for observability across programming languages and its integration with Spring Cloud Sleuth. The presentation includes practical applications and tools like the Pet Clinic project to demonstrate these concepts and solutions.
Peering Inside the Black Box: A Case for Observability
- 1. Peering inside the black box Gergely Tóth Java Platform Engineering
- 2. SPRING ONE, SEPTEMBER 2021 PUBLIC What is my service up to? Environment How much memory is available? Are we going to run out of file descriptors? Interactions How many incoming/outgoing calls does it make? What is the latency in responding to requests? Resource Usage How much CPU are we using? How much heap are we using? Version What version of the application code is running? What JDK is being used?
- 3. SPRING ONE, SEPTEMBER 2021 PUBLIC Three Pillars of Observability Tracing Series of related distributed events Events generated in different parts of the system for a given user interaction Metrics Numeric representation of measured data Maximum response time for a given endpoint Number of calls to an endpoint per seconds Logs Timestamped record of events Application startup and graceful shutdown Internal error detailed information
- 4. SPRING ONE, SEPTEMBER 2021 PUBLIC Cornucopia of options … OpenTelemetry Standard solution Provides a common single API for observability Supports the mayor programing languages Easy to use Automatic instrumentation using the agent Easy to get started with any application Collector Central place to receive, process and export traces and metrics (and logs) W3C Standard of context propagation Replaces homegrown formats https://opentelemetry.io/img/logos/opentelemetry-stacked-color.png
- 5. SPRING ONE, SEPTEMBER 2021 PUBLIC @NewSpan public void getAnnotationForTagValueResolver( @SpanTag(key = "test", resolver = TagValueResolver.class) String test) { } Spring Cloud Sleuth for tracing Part of Spring ecosystem Quick start: Spring initializr Integrates with other components OpenTelemetry bridge OpenTelemetry via Sleuth Currently in incubation https://spring.io/images/projects/spring-edf462fec682b9d48cf628eaf9e19521.svg
- 6. SPRING ONE, SEPTEMBER 2021 PUBLIC Pet Clinic https://github.com/spring-projects/spring-petclinic
- 7. SPRING ONE, SEPTEMBER 2021 PUBLIC How to: Pet Clinic Spring Cloud Gateway Pet Clinic Pet Clinic
- 8. SPRING ONE, SEPTEMBER 2021 PUBLIC How to: Pet Clinic Spring Cloud Gateway Pet Clinic Pet Clinic OTEL Collector
- 9. SPRING ONE, SEPTEMBER 2021 PUBLIC How to: Pet Clinic Spring Cloud Gateway Pet Clinic Pet Clinic OTEL Collector Jaeger
- 10. SPRING ONE, SEPTEMBER 2021 PUBLIC How to: Pet Clinic Spring Cloud Gateway Pet Clinic Pet Clinic OTEL Collector Jaeger Zipkin
- 11. SPRING ONE, SEPTEMBER 2021 PUBLIC How to: Pet Clinic Spring Cloud Gateway Pet Clinic Pet Clinic OTEL Collector Jaeger Zipkin Prometheus
- 12. SPRING ONE, SEPTEMBER 2021 PUBLIC How to: Pet Clinic Spring Cloud Gateway Pet Clinic Pet Clinic OTEL Collector Jaeger Zipkin Prometheus Grafana
- 13. SPRING ONE, SEPTEMBER 2021 PUBLIC Demo
- 14. SPRING ONE, SEPTEMBER 2021 PUBLIC ▪ Getting live information about services is crucial ▪ There is a cornucopia of vendors/libs/frameworks that provide observability ▪ These require specific dependency/agent for the services ▪ OpenTelemetry standardizes and gives a vendor agnostic solution ▪ Spring already has a standard solution for traces: Sleuth ▪ Using the bridge between Sleuth and OpenTelemetry provides an easy solution to benefit from both without changing the already existing code The story
- 15. SPRING ONE, SEPTEMBER 2021 PUBLIC ▪ Finalized Sleuth OpenTelemetry Bridge ▪ OpenTelemetry metrics SDK finalised ▪ OpenTelemetry for logs ▪ Integration of OpenTelemetry metrics export for Spring ▪ Integration for OpenTelemetry logs export for Spring What’s next?