Name: nodejs-logging-winston
Owner: Google APIs
Description: Node.js client integration between Stackdriver Logging and Winston.
Created: 2017-07-26 20:47:48.0
Updated: 2018-05-23 09:35:35.0
Pushed: 2018-05-22 18:32:22.0
Homepage: https://cloud.google.com/logging/
Size: 1072
Language: TypeScript
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This module provides an easy to use, higher-level layer for working with Stackdriver Logging, compatible with Winston. Simply attach this as a transport to your existing Winston loggers.
Read more about the client libraries for Cloud APIs, including the older Google APIs Client Libraries, in Client Libraries Explained.
Table of contents:
Select or create a Cloud Platform project.
Enable billing for your project.
Enable the Stackdriver Logging API.
Set up authentication with a service account so you can access the API from your local workstation.
For a more detailed Stackdriver Logging setup guide, see https://cloud.google.com/logging/docs/setup/nodejs.
npm install --save @google-cloud/logging-winston
t winston = require('winston');
t Logger = winston.Logger;
t Console = winston.transports.Console;
mports the Google Cloud client library for Winston
ode 6+
t {LoggingWinston} = require('@google-cloud/logging-winston');
ode 4+
onst LoggingWinston = require('@google-cloud/logging-winston').LoggingWinston;
sing ES6 style imports via TypeScript or Babel
mport {LoggingWinston} from '@google-cloud/logging-winston';
reates a Winston Stackdriver Logging client
t loggingWinston = new LoggingWinston();
reate a Winston logger that streams to Stackdriver Logging
ogs will be written to: "projects/YOUR_PROJECT_ID/logs/winston_log"
t logger = new Logger({
vel: 'info', // log at 'info' and above
ansports: [
// Log to the console
new Console(),
// And log to Stackdriver Logging
loggingWinston,
rites some log entries
er.error('warp nacelles offline');
er.info('shields at 99%');
Any Error
objects you log at severity error
or higher can automatically be picked up by Stackdriver Error Reporting if your application is running on Google Cloud Platform. Make sure to add logs to your uncaught exception and unhandled rejection handlers if you want to see those errors too.
You may also want to see the @google-cloud/error-reporting module which provides direct access to the Error Reporting API.
To format your request logs you can provide a httpRequest
property as part of the log metadata you provide to winston. We will treat this as the HttpRequest
message and Stackdriver logging will show this as a request log. Example:
ton.info(`${req.url} endpoint hit`, {
tpRequest: {
status: res.statusCode,
requestUrl: req.url,
requestMethod: req.method,
remoteIp: req.connection.remoteAddress,
// etc.
The httpRequest
proprety must be a properly formatted HttpRequest
message.
If you use @google-cloud/trace-agent module, then this module will set the Stackdriver Logging LogEntry trace
property based on the current trace context when available. That correlation allows you to view log entries inline with trace spans in the Stackdriver Trace Viewer. Example:
If you wish to set the LogEntry trace
property with a custom value, then set a winston metadata property for 'logging.googleapis.com/trace'
, which is exported by this module as LOGGING_TRACE_KEY
. For example:
t winston = require('winston');
t {LoggingWinston} = require('@google-cloud/logging-winston');
..
ton.info('Log entry with custom trace value', {
You can specify labels
when initiating the logger constructor.
reates a Winston Stackdriver Logging client
t loggingWinston = new LoggingWinston({
bels: {
name: 'some-name',
version: '0.1.0'
rites some log entries
er.debug('test msg');
ou can also put some `labels` when calling the logger function
he `labels` will be merge together
er.debug('test msg', {
bels: {
module: 'some-module'
The labels
will be on the Log Viewer.
You can specify a prefix
in the constructor, and that prefix
will be prepended to all logging messages. This can be helpful, for example, to quickly identify logs from different modules in a project.
reates a Winston Stackdriver Logging client
t loggingWinston = new LoggingWinston({
efix: 'some-module'
er.debug('test msg');
Samples are in the samples/
directory. The samples' README.md
has instructions for running the samples.
| Sample | Source Code | Try it | | ————————— | ——————————— | —— | | Quickstart | source code | | | Explict Auth Setup | source code | |
This library follows Semantic Versioning.
This library is considered to be in beta. This means it is expected to be mostly stable while we work toward a general availability release; however, complete stability is not guaranteed. We will address issues and requests against beta libraries with a high priority.
More Information: Google Cloud Platform Launch Stages
Contributions welcome! See the Contributing Guide.
Apache Version 2.0
See LICENSE