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https://github.com/truqu/lager_logstash

Send logs from lager to logstash
https://github.com/truqu/lager_logstash

erlang lager logstash

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Send logs from lager to logstash

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# `lager_logstash` [![Build Status](https://travis-ci.org/truqu/lager_logstash.svg?branch=develop)](https://travis-ci.org/truqu/lager_logstash)
> Logstash backend for lager

## Configuration

Add `lager` and `lager_logstash` to `rebar.config`:

```erlang
{deps, [lager, lager_logstash]}.
```

Add configuration to `sys.config`:

```erlang
{lager, [{ handlers
, [{ lager_logstash_backend
, [ {host, "logstash_host"}
, {port, 9125}
]
}]
}]
}
```

> **Note**: Logstash requires timestamps to be in UTC. However, there is no need
> to do anything special to get this working - `lager_logstash` does the
> conversion for you.

Configure a logstash pipeline:

```
input {
udp {
codec => "json"
port => 9125
}
}

output {
...
}

```

## Supported options

| Option | Default | Acceptable values |
|-------------------|---------|-----------------------------------------------------------------------------------------------------------------------------------------------|
| `host` (required) | / | `inet:socket_address()` or `inet:hostname()` |
| `port` (required) | / | `inet:port_number()` |
| `level` | `info` | `lager:log_level()` - including [syslog style comparison flags](https://github.com/erlang-lager/lager#syslog-style-loglevel-comparison-flags) |
| `fields` | `[]` | `[{atom(), jsx:json_term()}]` - allows specifying a bunch of extra fields to be included |

## Output format

All metadata is included as fields. Code like this:

```erlang
-module foo

-export([bar/0]).

bar () ->
lager:info([{foo, bar}], "Hello ~s", ["world"]).
```

Would result in JSON like this:

```javascript
{
"message": "Hello world",
"@timestamp": "2019-01-13T21:33:56.925Z",
"fields": {
"severity": "info",
"foo": "bar",
"application": "otp_application",
"node": "some_node@localhost",
"pid": "<0.13919.0>",
"module": "foo",
"function": "bar",
"line": "6"
}
}
```

## License

Released under the MIT license - please see the `LICENSE` file.

© 2019 - TruQu