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DOCUMENTATION > LOG COLLECTION

Log Collection & Routing

LogDoc collects logs from application SDKs, system sources and custom protocols — with flexible routing and real-time filtering

SDKs & Libraries

Built-in support for popular programming languages

Java

Integration via Log4j, Logback and java.util.logging

Learn more → Python

Native library with logging module and structlog support

Learn more → Go

High-performance SDK with zap and logrus support

Learn more → Node.js

Integration with Winston, Pino and the built-in console module

Learn more →

System Sources

Collect logs from system services and daemons

Syslog

Ingest logs via the Syslog protocol (RFC 5424) with TCP and UDP transport support

Learn more → Journald

Integration with the systemd journal for collecting structured logs from Linux systems

Learn more →

LogDoc Protocols

Collect logs from any source through native LogDoc protocols

LogDoc TCP

A high-performance streaming protocol for reliable log delivery with ordering guarantees and delivery acknowledgement. Ideal for mission-critical systems.

Learn more →
LogDoc UDP

A lightweight protocol for high-frequency log delivery without connection setup overhead. Best for streaming telemetry and non-critical data.

Learn more →
LogDoc HTTP

A REST API for sending logs over HTTP/HTTPS. Universal integration with any system or language through standard HTTP requests with JSON payloads.

Learn more →

Data Transfer Format

A unified LogDoc log format ensures compatibility across all protocols and sources

logdoc-format.json 
{
  "timestamp": "2024-01-15T10:23:45.123Z",
  "level": "ERROR",
  "source": "app.payment.service",
  "host": "prod-node-03",
  "message": "Payment processing failed",
  "fields": {
    "order_id": "ORD-98712",
    "amount": 1250.00,
    "currency": "RUB",
    "error_code": "TIMEOUT"
  },
  "tags": ["payment", "critical"]
}

Log entry structure

Every entry carries a standardized set of fields, keeping data consistent regardless of the source.

timestamp Event timestamp in ISO 8601 format
level Log level: TRACE, DEBUG, INFO, WARN, ERROR, FATAL
source / host Source and host the log came from
fields / tags Arbitrary fields and tags for filtering and routing