docker-cloudwatchlogs

Forward all your logs to CloudWatch Logs, like a breeze.

Usage as a Container

The simplest way to forward all your container's log to Cloudwatch is to run this repository as a container, with:

docker run -v /var/run/docker.sock:/var/run/docker.sock dberesford/docker-cloudwatchlogs -a ACCESSKEY -s SECRET_KEY -r REGION -g GROUP_NAME -t STREAM_NAME

Running container in a restricted environment.

Some environments(such as Google Compute Engine) does not allow to access the docker socket without special privileges. You will get EACCES(Error: read EACCES) error if you try to run the container. To run the container in such environments add --privileged to the docker run command.

Example:

docker run --privileged -v /var/run/docker.sock:/var/run/docker.sock dberesford/docker-cloudwatchlogs -a ACCESSKEY -s SECRET_KEY -r REGION -g GROUP_NAME -t STREAM_NAME

Usage as a CLI

1. npm install docker-cloudwatchlogs -g
2. docker-cloudwatchlogs -a ACCESSKEY -s SECRET_KEY -r REGION -g GROUP_NAME -t STREAM_NAME
3. ..there is no step 3

Embedded usage

Install it with: npm install docker-cloudwatchlogs --save

Then, in your JS file:

var cloudwatchlogs = require('docker-cloudwatchlogs')({
  'accessKeyId': 'ACCESS_KEY',
  'secretAccessKey': 'SECRET_KEY',
  'region': 'REGION',
  'logGroupName': 'GROUP_NAME',
  'logStreamName': 'STREAM_NAME',
  'bulkIndex': BULK_INDEX,
  'timeout': TIMEOUT   
})

// cloudwatch is the source stream with all the
// log lines

setTimeout(function() {
  cloudwatchlogs.destroy()
}, 5000)

Building a docker repo from this repository

First clone this repository, then:

docker build -t cloudwatchlogs .
docker run -v /var/run/docker.sock:/var/run/docker.sock cloudwatchlogs -a ACCESSKEY -s SECRET_KEY -r REGION -g GROUP_NAME -t STREAM_NAME

How it works

This module wraps four Docker APIs:

• POST /containers/{id}/attach, to fetch the logs
• GET /containers/{id}/stats, to fetch the stats of the container
• GET /containers/json, to detect the containers that are running when this module starts
• GET /events, to detect new containers that will start after the module has started

This module wraps:

• docker-loghose
• docker-stats to fetch the logs and the stats as a never ending stream of data
• cloudwatchlogs-stream to stream the logs to CloudWatch

All the originating requests are wrapped in never-ending-stream.

License

MIT