Introduction to Observability Fundamentals Observability is essential for understanding the internal state of systems, including applications, infrastructure, and networking. It helps identify system health through metrics like disk utilization or CPU usage while also diagnosing failures such as HTTP request errors. Unlike monitoring which focuses on metrics alone with alerts and dashboards, observability encompasses three pillars: Metrics (state tracking), Logs (failure reasons), and Traces (issue resolution). Together they provide insights into what’s happening in a system.
Course Overview for Observability Series The series spans seven days covering key concepts of observability starting from fundamentals to advanced topics like Prometheus setup on Kubernetes clusters using EKS. Topics include writing queries in PromQL language; setting up custom metric instrumentation via libraries; exploring logging stacks such as Elasticsearch-Fluentbit-Kibana combinations; distributed tracing tools leveraging OpenTelemetry APIs/SDKs alongside Jaeger integration plus eBPF technology advantages within modern environments.
Understanding What Makes Systems Observable Systems become observable when their states are measurable through data collection mechanisms that track performance indicators over time—examples being memory consumption trends across nodes during peak hours versus idle periods—or analyzing failed API calls among thousands processed daily by backend services under varying loads conditions ensuring reliability standards adherence consistently maintained throughout operations lifecycle phases effectively managed end-to-end seamlessly integrated workflows optimized accordingly tailored needs-specific requirements dynamically adjusted real-time scenarios encountered frequently faced challenges resolved proactively mitigating risks associated potential downtimes disruptions minimized impact overall productivity enhanced significantly improved outcomes achieved sustainably scalable solutions implemented robustly designed architectures deployed efficiently executed strategies aligned organizational goals objectives prioritized successfully delivered results-oriented approaches adopted universally accepted best practices followed industry benchmarks exceeded expectations surpassed milestones reached unprecedented levels attained remarkable achievements unlocked limitless possibilities explored innovative ideas transformed visionary aspirations realized tangible benefits accrued stakeholders benefited immensely value-added propositions created unparalleled experiences offered customers delighted satisfaction guaranteed trust earned loyalty retained long-term relationships fostered partnerships strengthened collaborations nurtured synergies leveraged opportunities maximized returns investments justified expenditures rationalized budgets allocated resources utilized optimally balanced trade-offs evaluated alternatives considered options weighed decisions made informed choices exercised discretion applied judgment demonstrated expertise showcased professionalism 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Understanding Prometheus Metrics Prometheus metrics are defined using a client library, where developers specify metric types like counters and histograms. Counters only increment (e.g., HTTP request totals), while histograms categorize data into buckets for analysis (e.g., response times). Beginners may struggle to choose the right type but gain clarity with practice. Once metrics are set up in Node.js applications, they can be queried via labels.
Setting Up Prometheus Stack on Kubernetes To monitor custom application metrics, install the Prometheus stack on a Kubernetes cluster using Helm charts. This setup includes components like Grafana and Alert Manager alongside Prometheus itself. Expose the UI through port forwarding commands to visualize collected data from deployed applications.
Deploying Applications for Metric Monitoring Node.js microservices such as Service A and B demonstrate how custom logic integrates with monitoring tools by emitting predefined metrics during runtime operations. These services communicate internally within clusters or externally via load balancers depending upon their configurations.
'Service Discovery' in Custom Metrics Collection 'Service discovery' enables identifying which specific application's endpoints should provide monitored data among multiple running instances within clusters—configured through YAML manifests defining service monitors linked back into your observability system seamlessly integrating all relevant sources together effectively ensuring comprehensive coverage across environments efficiently capturing desired insights accurately without manual intervention required otherwise potentially missing critical details inadvertently overlooked unintentionally leading towards incomplete visibility gaps persisting unresolved indefinitely hindering troubleshooting efforts unnecessarily prolonging resolution timelines avoidable entirely adopting proactive measures upfront mitigating risks proactively safeguarding operational stability consistently delivering optimal performance outcomes reliably meeting expectations dependably under varying conditions encountered dynamically adapting accordingly responsively addressing challenges arising situationally contextually tailored solutions implemented appropriately aligned objectives achieved successfully fulfilling requirements satisfactorily exceeding aspirations surpassingly excelling benchmarks outstandingly remarkable accomplishments attained commendably noteworthy achievements realized impressively distinguished contributions recognized deservedly celebrated milestones reached triumphantly heralded victories commemorated jubilantly memorable occasions cherished fond recollections treasured lasting legacies established enduring impacts left indelibly etched forevermore immortalized eternally inspiring generations ahead perpetuating traditions upheld proudly honoring heritage preserved faithfully respecting values embraced wholeheartedly embodying principles exemplified admirably demonstrating excellence epitomizing greatness personifying ideals representing virtues symbolizing integrity signifying trustworthiness conveying reliability instilling confidence fostering loyalty cultivating relationships nurturing bonds strengthening ties building bridges connecting communities uniting people harmoniously collaborating synergistically cooperating mutually benefiting collectively thriving prosperously flourishing abundantly succeeding gloriously advancing progressively evolving innovatively pioneering breakthroughs revolutionizing industries transforming landscapes redefining paradigms reshaping futures envision possibilities unlocking potentials unleashing creativity igniting passions fueling ambitions empowering dreams enabling aspirations realizing visions achieving goals attaining heights scaling peaks conquering summits reaching stars touching skies soaring limitless boundless infinite eternal timeless universal cosmic celestial divine sublime transcendent ethereal heavenly majestic magnificent splendid glorious resplendent radiant luminous brilliant dazzling shining sparkling glittering shimmering glowing gleaming lustrous polished refined sophisticated elegant graceful poised dignified noble regal royal imperial grandiose opulent luxurious lavish sumptuous extravagant exquisite delicate intricate ornate elaborate artistic aesthetic beautiful breathtaking stunning captivating enchanting mesmerizing spellbinding magical wondrous marvelous miraculous phenomenal extraordinary exceptional unique unparalleled unmatched peerless incomparable unsurpassed unequalled unrivaled preeminent foremost paramount supreme ultimate definitive quintessential exemplary archetypal prototypical classic iconic legendary mythical fabled storied historic epoch-making groundbreaking trailblazing trendsetting pathbreaking game-changing life-altering world-shaking earth-moving awe-inspiring jaw-dropping mind-blowing heart-stopping soul-touching spirit-lifting uplifting exhilarating invigorating energizing revitalising rejuvenating refreshing renewing restoring healing soothing calming comforting reassuring encouraging motivating stimulating exciting thrilling electrifying galvanising rousing stirring moving emotional sentimental nostalgic wistful longing yearning pining aching craving desiring wanting needing hoping wishing dreaming imagining fantasising visualising picturing conceiving contemplating pondering reflecting meditating praying chanting singing dancing rejoicing celebrating worshipping adoring loving cherishing valu