#NOAA

NOAA is a client library to consume metric and log messages from Doppler.

##WARNING

This library does not work with Go 1.3 through 1.3.3, due to a bug in the standard libraries.

##Get the Code

This Go project is designed to be imported into $GOPATH, rather than being cloned into any working directory. There are two ways to do this.

• The easiest way with with go get. This will import the project, along with all dependencies, into your $ GOPATH.

  $ echo $GOPATH
  /Users/myuser/go
  
  $ go get github.com/cloudfoundry/noaa
  
  $ ls ~/go/src/github.com/cloudfoundry/
  noaa/         sonde-go/
  

• You can also manually clone the repo into your $GOPATH, but you then have to manually import dependencies.

  $ echo $GOPATH
  /Users/myuser/go
  
  $ cd /Users/myuser/go/src/github.com/cloudfoundry
  $ git clone git@github.com:cloudfoundry/noaa.git
  $ cd noaa
  $ go get ./...
  

Sample Applications

Prerequisites

In order to use the sample applications below, you will have to export the following environment variables:

• CF_ACCESS_TOKEN - You can get this value by executing ($ cf oauth-token). Example:

export CF_ACCESS_TOKEN="bearer eyJhbGciOiJSUzI1NiJ9.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.mAaOJthCotW763lf9fysygqdES_Mz1KFQ3HneKbwY4VJx-ARuxxiLh8l_8Srx7NJBwGlyEtfYOCBcIdvyeDCiQ0wT78Zw7ZJYFjnJ5-ZkDy5NbMqHbImDFkHRnPzKFjJHip39jyjAZpkFcrZ8_pUD8XxZraqJ4zEf6LFdAHKFBM"

• DOPPLER_ADDR - It is based on your environment. Example:

export DOPPLER_ADDR="wss://doppler.10.244.0.34.xip.io:4443"

Application logs

The samples/app_logs/main.go application streams logs for a particular app. The following environment variable needs to be set:

• APP_GUID - You can get this value from running $ cf app APP --guid. Example:

export APP_GUID=55fdb274-d6c9-4b8c-9b1f-9b7e7f3a346c

Then you can run the sample app like this:

go build -o bin/app_logs samples/app_logs/main.go
bin/app_logs

Logs and metrics firehose

The samples/firehose/main.go application streams metrics data and logs for all apps.

You can run the firehose sample app like this:

go build -o bin/firehose samples/firehose/main.go
bin/firehose

Multiple subscribers may connect to the firehose endpoint, each with a unique subscription_id (configurable in main.go). Each subscriber (in practice, a pool of clients with a common subscription_id) receives the entire stream. For each subscription_id, all data will be distributed evenly among that subscriber's client pool.

Container metrics

The samples/container_metrics/consumer/main.go application streams container metrics for the specified appId.

You can run the container metrics sample app like this:

go build -o bin/container_metrics samples/container_metrics/consumer/main.go
bin/container_metrics

For more information to setup a test environment in order to pull container metrics look at the README.md in the container_metrics sample.

##Development

Use go get -d -v -t ./... && ginkgo --race --randomizeAllSpecs --failOnPending --skipMeasurements --cover to run the tests.