Technical guide
OpenTelemetry Collector: architecture, configuration, and operation
Understand Collector pipelines, validate a trace configuration, choose Agent or Gateway deployment, and verify export to DataKit.
Technical guide
Instrument Go services with OpenTelemetry tracing
Connect Go HTTP, Redis, and SQL operations with propagated context, export through a Collector, and verify request traces in Guance.
Technical guide
Add OpenTelemetry metrics to a Spring Boot service
Record request counts, in-flight work, latency histograms, and downstream failures in Java, then validate the exported metrics in Guance.
Technical guide
OpenTelemetry metrics: instruments, Views, and export semantics
Choose metric instruments, control attributes and histogram aggregation with Views, and verify temporality and OTLP or Prometheus export.
Technical guide
Node.js tracing with OpenTelemetry: automatic instrumentation and custom spans
Initialize OpenTelemetry before a Node.js app, configure OTLP over HTTP, add business spans, and verify async context, shutdown, and Guance trace correlation.
Technical guide
OpenTelemetry sampling: head decisions, tail policies, and limits
Choose head or tail sampling with explicit data-loss trade-offs, trace-aware routing, bounded memory, and verified error and latency policies.
Technical guide
OpenTelemetry SDK: resources, providers, and signal pipelines
Understand how the OpenTelemetry SDK connects APIs to resources, sampling, aggregation, propagation, and signal-specific export.
Technical guide
OpenTelemetry semantic conventions: names, types, and migrations
Apply resource, span, metric, and log conventions consistently, namespace custom attributes, and plan schema migrations safely.
Technical guide
PHP logging: error_log, exceptions, and PSR-3
Configure PHP error reporting, distinguish SAPI and FPM destinations, preserve exception details, and move application logs toward PSR-3 and Monolog.
Technical guide
Podman logging: viewing, retention, and collection
Read Podman logs, compare journald and k8s-file, limit local storage, export records, and select a collector that understands the actual log format.
Technical guide
Postfix logging: trace delivery, queues, and failures
Follow Postfix queue IDs, distinguish deferred and bounced mail, inspect delivery attempts, and collect useful mail logs in Guance.
Technical guide
10 Python logging practices for production services
Build useful Python logs with named loggers, centralized configuration, structured fields, exception tracebacks, safe data handling, and reliable collection.