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    2.2.2 • Public • Published


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    A Grafana Loki transport for the nodejs logging library Winston.


    This Winston transport is used similarly to other Winston transports. Require winston and define a new LokiTransport() inside its options when creating it.


    LokiTransport() takes a Javascript object as an input. These are the options that are available, required in bold:

    Parameter Description Example Default
    host URL for Grafana Loki http://localhost:3100 null
    interval The interval at which batched logs are sent in seconds 30 5
    json Use JSON instead of Protobuf for transport true false
    batching If batching is not used, the logs are sent as they come true true
    clearOnError Discard any logs that result in an error during transport true false
    replaceOnError Replace timestamps and retry on error true false
    replaceTimestamp Replace any log timestamps with true false


    const { createLogger, transports } = require("winston");
    const LokiTransport = require("winston-loki");
    const options = {
      transports: [
        new LokiTransport({
          host: "http://localhost:3100"
    const logger = createLogger(options);


    npm install
    npm link
    cd ~/your_project
    npm link winston-loki
    npm install

    And you should have a working, requirable winston-loki package under your project's node_modules.

    Refer to for documentation about the available endpoints, data formats etc.

    Grafana Loki doesn't have any official releases or version numbers as of now, so if the API is changed, it's going to be fun, but it's working as of now.

    Run tests

    npm test

    Write new ones under /test

    TODO: Remove got dependency


    npm i winston-loki@2.2.2





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    • janianttonen