slog: Syslog handler

A Syslog Handler for slog Go library.

See also:

• slog-multi: slog.Handler chaining, fanout, routing, failover, load balancing...
• slog-formatter: slog attribute formatting
• slog-sampling: slog sampling policy
• slog-gin: Gin middleware for slog logger
• slog-echo: Echo middleware for slog logger
• slog-fiber: Fiber middleware for slog logger
• slog-datadog: A slog handler for Datadog
• slog-rollbar: A slog handler for Rollbar
• slog-sentry: A slog handler for Sentry
• slog-syslog: A slog handler for Syslog
• slog-logstash: A slog handler for Logstash
• slog-fluentd: A slog handler for Fluentd
• slog-graylog: A slog handler for Graylog
• slog-loki: A slog handler for Loki
• slog-slack: A slog handler for Slack
• slog-telegram: A slog handler for Telegram
• slog-mattermost: A slog handler for Mattermost
• slog-microsoft-teams: A slog handler for Microsoft Teams
• slog-webhook: A slog handler for Webhook
• slog-kafka: A slog handler for Kafka

🚀 Install

go get github.com/samber/slog-syslog

Compatibility: go >= 1.21

No breaking changes will be made to exported APIs before v2.0.0.

💡 Usage

GoDoc: https://pkg.go.dev/github.com/samber/slog-syslog

Handler options

type Option struct {
	// log level (default: debug)
	Level slog.Leveler

	// connection to syslog server
	Writer *syslog.Writer

	// optional: customize json payload builder
	Converter Converter
}

Attributes will be injected in log payload.

Example

import (
	"net"
	slogsyslog "github.com/samber/slog-syslog"
	"log/slog"
)

func main() {
	// ncat -u -l 9999 -k
	writer, err := net.Dial("udp", "localhost:9999")
	if err != nil {
		log.Fatal(err)
	}

	logger := slog.New(slogsyslog.Option{Level: slog.LevelDebug, Writer: writer}.NewSyslogHandler())
    logger = logger.
        With("environment", "dev").
        With("release", "v1.0.0")

    // log error
    logger.
        With("category", "sql").
        With("query.statement", "SELECT COUNT(*) FROM users;").
        With("query.duration", 1*time.Second).
        With("error", fmt.Errorf("could not count users")).
        Error("caramba!")

    // log user signup
    logger.
        With(
            slog.Group("user",
                slog.String("id", "user-123"),
                slog.Time("created_at", time.Now()),
            ),
        ).
        Info("user registration")
}

Output:

@cee: {"timestamp":"2023-04-10T14:00:0.000000", "level":"ERROR", "message":"caramba!", "error":{ "error":"could not count users", "kind":"*errors.errorString", "stack":null }, "extra":{ "environment":"dev", "release":"v1.0.0", "category":"sql", "query.statement":"SELECT COUNT(*) FROM users;", "query.duration": "1s" }}


@cee: {"timestamp":"2023-04-10T14:00:0.000000", "level":"INFO", "message":"user registration", "error":null, "extra":{ "environment":"dev", "release":"v1.0.0", "user":{ "id":"user-123", "created_at":"2023-04-10T14:00:0.000000+00:00"}}}

🤝 Contributing

• Ping me on twitter @samuelberthe (DMs, mentions, whatever :))
• Fork the project
• Fix open issues or request new features

Don't hesitate ;)

# Install some dev dependencies
make tools

# Run tests
make test
# or
make watch-test

👤 Contributors

💫 Show your support

Give a ⭐️ if this project helped you!

📝 License

Copyright © 2023 Samuel Berthe.

This project is MIT licensed.