Go Wiki: Resources for slog

This page links to projects that use or enhance slog, the structured logging package for the standard library.

Log formatting

• slog-formatter: Common formatters for slog + helpers for building your own: https://github.com/samber/slog-formatter
• ConsoleHandler (similar to Zap’s ConsoleEncoder): https://gist.github.com/wijayaerick/de3de10c47a79d5310968ba5ff101a19
• logf (attr {key} interpolation, rich tty output): https://pkg.go.dev/github.com/AndrewHarrisSPU/logf (uses lazy Handler stores: https://go.dev/play/p/psdD7KDF5fp )
• slogd - slog with duration https://github.com/kaihendry/slogd with video https://youtu.be/IsPa11N5pzI
• tinted (colorized) output: https://pkg.go.dev/github.com/lmittmann/tint
• humane: a human-friendly (but still largely structured) slog Handler: https://github.com/telemachus/humane
• slug: a handler that prints colourful logs for humans: https://github.com/dotse/slug
• slogor: A colorful slog handler: https://gitlab.com/greyxor/slogor
• klog: the text format used by Kubernetes. Provides klog output routing when using the main package’s logger and a simpler logger that just writes to stderr. Both slog/logr and go-logr/logr APIs are supported.
• slogjson: Format using the upcoming JSON v2 library, with optional single-line pretty-printing: https://github.com/veqryn/slog-json

Logger bridge

• Zap Handler, a slog handler that uses Zap: https://github.com/chanchal1987/zaphandler
• zapr: starting with v1.3.0, both slog/logr and go-logr/logr APIs are supported by the same logger instance.

Logging Middleware

• slogctx: store attributes or the logger in context, read any custom values from context: https://github.com/veqryn/slog-context
• slog-context/otel: automatically read and add OpenTelemetry TraceID and SpanID to logs, and can set Span error code: github.com/veqryn/slog-context/otel
• slogdedup: deduplication and sorting of attribute keys, with multiple policies, useful for json logging. Convenience methods to output for Stackdriver, Graylog, and others: https://github.com/veqryn/slog-dedup

HTTP server middleware

• slog-gin: Gin middleware for slog logger: https://github.com/samber/slog-gin
• slog-echo: Echo middleware for slog logger: https://github.com/samber/slog-echo
• slog-fiber: Fiber middleware for slog logger: https://github.com/samber/slog-fiber
• slog-chi: Chi middleware for slog logger: https://github.com/samber/slog-chi

Log sinks

• Experimental example using both OpenTelemetry and slog: https://github.com/justinsb/experiments-slog
• Simple slog handler with opentelemetry tracing: https://github.com/ttys3/slogsimple/tree/main
• slog-datadog: a slog.Handler for Datadog: https://github.com/samber/slog-datadog
• slog-rollbar: a slog.Handler for Rollbar: https://github.com/samber/slog-rollbar
• slog-sentry: a slog.Handler for Sentry: https://github.com/samber/slog-sentry
• slog-syslog: a slog.Handler for Syslog: https://github.com/samber/slog-syslog
• slog-logstash: a slog.Handler for Logstash: https://github.com/samber/slog-logstash
• slog-fluentd: a slog.Handler for Fluentd: https://github.com/samber/slog-fluentd
• slog-graylog: a slog.Handler for Graylog: https://github.com/samber/slog-graylog
• slog-loki: a slog.Handler for Loki: https://github.com/samber/slog-loki
• slog-slack: a slog.Handler for Slack: https://github.com/samber/slog-slack
• slog-telegram: a slog.Handler for Telegram: https://github.com/samber/slog-telegram
• slog-mattermost: a slog.Handler for Mattermost: https://github.com/samber/slog-mattermost
• slog-microsoft-teams: a slog.Handler for Microsoft Teams: https://github.com/samber/slog-microsoft-teams
• slog-webhook: a slog.Handler for Webhook: https://github.com/samber/slog-webhook
• slog-kafka: a slog.Handler for Kafka: https://github.com/samber/slog-kafka
• slogbugsnag: a slog.Handler for Bugsnag: https://github.com/veqryn/slog-bugsnag
• slogdriver: a slog.Handler for Stackdriver Logging / GCP Cloud Logging: https://github.com/jussi-kalliokoski/slogdriver

Handlers

• slog-multi: chain of slog.Handler (pipeline, fanout, …): https://github.com/samber/slog-multi
• various handlers: https://github.com/galecore/xslog

Other:

• Additional resources written by jba: https://github.com/jba/slog
• slog-sampling: drop repetitive log entries: https://github.com/samber/slog-sampling
• slog-context: adds support to reading values from context: https://github.com/PumpkinSeed/slog-context
• slogassert: handle for testing slog logs emitted by code: https://github.com/thejerf/slogassert
• sloggen: generate various helpers for log/slog: https://github.com/go-simpler/sloggen
• sloglint: ensure consistent code style when using log/slog: https://github.com/go-simpler/sloglint

This content is part of the Go Wiki.