# TD Agent Logs Sent to Treasure Data

You can send Treasure Agent (td-agent) and Fluentd logs to the Treasure Data platform.

* [Capture td-agent / Fluentd logs](#capture-td-agent--fluentd-logs)
* [Prerequisites](#prerequisites)
* [td-agent Logs](#td-agent-logs)
* [Sending Logs to Treasure Data](#sending-logs-to-treasure-data)
* [Viewing Logs in Treasure Data](#viewing-logs-in-treasure-data)
* [What's Next?](#whats-next)


## Capture td-agent / Fluentd logs

You can send and store td-agent logs in Treasure Data.

## Prerequisites

* Basic knowledge of Treasure Data Agent.
* Basic knowledge of Treasure Data Agent / Fluentd configuration and syntax, see [Configuration File Syntax](https://docs.fluentd.org/v1.0/articles/config-file), to understand the terms and concepts used in this article.


## td-agent Logs

td-agent marks its own logs with the `fluent` tag. You can process td-agent logs by using `<match fluent.**> `(Of course, `**` captures other logs) in `<label @FLUENT_LOG>`. If you define in `<label @FLUENT_LOG>` your configuration, then td-agent sends its own logs to this label. This is useful for monitoring td-agent logs.

For example, if you have the following configuration:


```conf
# omit other source / match
<label @FLUENT_LOG>
  <match fluent.*>
    @type stdout
  </match>
</label>
```

td-agent outputs `fluent.info` logs to stdout as follows:


```text
2014-02-27 00:00:00 +0900 [info]: shutting down fluentd
2014-02-27 00:00:01 +0900 fluent.info: {"message":"shutting down fluentd"} # by <match fluent.*>
2014-02-27 00:00:01 +0900 [info]: process finished code = 0
```

## Sending Logs to Treasure Data

To send td-agent logs to Treasure Data for storage, you must modify the td-agent log configuration section. You need to include the modifications in the `<match fluent.*>` section, as shown in the following example. Ensure to include your write-only API key instead of `<YOUR TD API KEY>`.


```conf
<label @FLUENT_LOG>
  <match fluent.*>
    @type tdlog
    apikey <YOUR TD API KEY>
    auto_create_table
    use_ssl true
    <buffer>
      @type file
      path /var/log/td-agent/buffer/td_logs
    </buffer>
  </match>
</label>
```

Save your changes to the configuration file and restart the td-agent.

## Viewing Logs in Treasure Data

td-agent logs sent to Treasure Data are stored in a database named `fluent` on your instance. Within the fluent database, a series of tables are created corresponding to the different log levels used by the fluentd logger.

![](/assets/fluent___treasure_data.a4e8162b15e1c778a6d32a0e1d829e1026d19e726e70b5dac4ee913e25117c67.ef656343.png)

## What’s Next?

For more information on td-agent's logs see [Fluentd Logging](https://docs.fluentd.org/deployment/logging).