logdrift

Tail and diff structured JSON logs across multiple services in real time.

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Installation

go install github.com/yourusername/logdrift@latest

Or build from source:

git clone https://github.com/yourusername/logdrift.git
cd logdrift
go build -o logdrift .

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Usage

Tail logs from multiple services and highlight structural differences as they arrive:

logdrift --services auth-service,payment-service --field level,message,trace_id

Pipe from log files or streams:

logdrift --input ./logs/auth.log ./logs/payment.log --diff-keys timestamp,error

Example output:

[auth-service]     {"level":"error","message":"token expired","trace_id":"abc123"}
[payment-service]  {"level":"info","message":"charge processed","trace_id":"abc123"}
                   ^^^ DRIFT: level mismatch — error vs info

Flags

Flag	Description
--services	Comma-separated list of service names to tail
--input	One or more log file paths to read from
--field	JSON fields to compare across services
--follow	Keep tailing as new log lines arrive (default: true)
--format	Output format: pretty, json, or compact

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Requirements

• Go 1.21+
• Services must emit newline-delimited JSON logs

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License

MIT © 2024 yourusername