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Adds README for Kafka consumer plugin

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Emil Stolarsky 2015-07-08 15:39:23 -04:00
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# Kafka Consumer
The [Kafka](http://kafka.apache.org/) consumer plugin polls a specified Kafka
topic and adds messages to InfluxDB. The plugin assumes messages follow the
line protocol. [Consumer Group](http://godoc.org/github.com/wvanbergen/kafka/consumergroup)
is used to talk to the Kafka cluster so multiple instances of telegraf can read
from the same topic in parallel.
## Testing
Running integration tests requires running Zookeeper & Kafka. The following
commands assume you're on OS X & using [boot2docker](http://boot2docker.io/).
To start Kafka & Zookeeper:
```
docker run -d -p 2181:2181 -p 9092:9092 --env ADVERTISED_HOST=`boot2docker ip` --env ADVERTISED_PORT=9092 spotify/kafka
```
To run tests:
```
ZOOKEEPER_PEERS=$(boot2docker ip):2181 KAFKA_PEERS=$(boot2docker ip):9092 go test
```