# Redis Appender

Stores log events in a [Redis](https://redis.io) database. You will need to include the [redis](https://www.npmjs.com/package/redis) package in your application's dependencies to use this appender.

## Configuration

* `type` - `redis`
* `host` - `string` (optional, defaults to `127.0.0.1`) - the location of the redis server
* `port` - `integer` (optional, defaults to `6379`) - the port the redis server is listening on
* `pass` - `string` (optional) - password to use when authenticating connection to redis
* `channel` - `string` - the redis channel that log events will be published to
* `layout` - `object` (optional, defaults to `messagePassThroughLayout`) - the layout to use for log events (see [layouts](layouts.md)).

The appender will use the Redis PUBLISH command to send the log event messages to the channel.

## Example

```javascript
log4js.configure({
  appenders: {
    redis: { type: 'redis', channel: 'logs' }
  },
  categories: { default: { appenders: ['redis'], level: 'info' } }
});
```

This configuration will publish log messages to the `logs` channel on `127.0.0.1:6379`.