simple-gcloud-logger

An easy interface to send logs to Google Cloud Platform Logging for Compute Engine, for Node.js.

Getting started - important

This is an unofficial wrapper library.

This library is strictly for writing logs and will not have permission or APIs to do anything else.

Before using this library, look at the official docs real quick. so you understand the necessary requirements for doing logging. Certain fields are required and have expected values.

https://cloud.google.com/logging/docs/api/tasks/creating-logs#write_log_entries

At the time of writing, this was a beta service of google and you must ask for access.

Usage

npm i simple-gcloud-logger

var GCloudLogger = require('simple-gcloud-logger');
var logger = new GCloudLogger({
    clientEmail: '[email protected]',
    privateKeyPath: '/path/to/my/gcloud-credentials-file.p12',
    project: 'gcloud-project-name-3543',
    logId: 'mycustomservice',
    verbose: false,
    send: true,
    commonLabels: {
        // "compute.googleapis.com/resource_id": "12345",
        // "compute.googleapis.com/resource_type": "instance",
    }
});
logger.log('Hey');
logger.log({
    insertId: +new Date() + '-asdf', // custom log entry unique id
    myText: 'Asdf',
    myCode: 7
});
logger.flush(); // force sending the logs

To print output, pass environment variables via DEBUG=<logId>. This package uses the debug module internally.

Methods

logger.log('I will be INFO');

logger.debug('I will be DEBUG');
logger.info('I will be INFO');
logger.warning('I will be WARNING');
logger.error('I will be ERROR');
logger.critical('I will be CRITICAL');

The logger can also be passed an object.

logger.log({
    level: 'DEBUG',
    someData: {
        send: 'to gcloud loggin'
    }
});

logger.error({
    err: new Error('We need more spaghetti'),
    status: 400,
    something: 'else'
});

Log method options

When passing an object to a logger method, the following internal properties are used. All other properties are passed through and will be written to the console according to DEBUG=, as well as show up in the GCloud Log Viewer.

logger.log({
    // internal gcloud logging fields - will not be outputted to debug if
    // they are included in a log message
    level: 'INFO',
    insertId: '123-asdf-456',
    timestamp: new Date().toISOString(),
    labels: {
        "compute.googleapis.com/resource_id": "12345",
        "compute.googleapis.com/resource_type": "instance",
    },

    // will be logged
    myProperty: 75,
    someText: 'hot dogs'
});