gofor-little / log

A structured logger that supports AWS CloudWatch.

A package for structured logging

Introduction

• Structured logging
• Supports AWS CloudWatch
• Simple interface for implementing your own

Example

package main

import (
    "fmt"

    "github.com/aws/aws-sdk-go/aws/session"
    "github.com/gofor-little/log"
)

func main() {
    // Standard logger writes to a user defined io.Writer.
    log.Log = log.NewStandardLogger(os.Stdout, log.Fields{
        "tag": "standard_logger",
    })

    // CloudWatch logger writes to an AWS CloudWatch log group.
    sess, err = session.NewSession()
    log.Log, err = log.NewCloudWatchLogger(context.Background(), os.Getenv("AWS_PROFILE"), os.Getenv("AWS_REGION"), "CloudWatchLoggerTest", log.Fields{
        "tag": "cloudWatchLoggerTest",
    })
    if err != nil {
        panic(err)
    }

    // Log at info, error and debug levels.
    log.Info(log.Fields{
        "message": "info message",
        "bool":   true,
        "int":    64,
        "float":  3.14159,
    })

    log.Error(log.Fields{
        "string": "error message",
        "bool":   true,
        "int":    64,
        "float":  3.14159,
    })

    log.Debug(log.Fields{
        "string": "debug message",
        "bool":   true,
        "int":    64,
        "float":  3.14159,
    })
}

Testing

Ensure the following environment variables are set, usually with a .env file.

• AWS_PROFILE (an AWS CLI profile name)
• AWS_REGION (a valid AWS region)

Run go test -v -race ./... in the root directory.