# GelfLogger [](https://travis-ci.org/jschniper/gelf_logger)
A logger backend that will generate Graylog Extended Log Format messages. The
current version only supports UDP messages.
## Configuration
In the config.exs, add gelf_logger as a backend like this:
```elixir
config :logger,
backends: [:console, {Logger.Backends.Gelf, :gelf_logger}]
```
In addition, you'll need to pass in some configuration items to the backend
itself:
```elixir
config :logger, :gelf_logger,
host: "127.0.0.1",
port: 12201,
format: "$message",
application: "myapp",
compression: :gzip, # Defaults to :gzip, also accepts :zlib or :raw
metadata: [:request_id, :function, :module, :file, :line],
hostname: "hostname-override",
format: {Module, :function} # or format: "[$level] $message"
tags: [
list: "of",
extra: "tags"
]
```
In addition to the backend configuration, you might want to check the
[Logger configuration](https://hexdocs.pm/logger/Logger.html) for other
options that might be important for your particular environment. In
particular, modifying the `:utc_log` setting might be necessary
depending on your server configuration.
This backend supports `metadata: :all`.
## Usage
Just use Logger as normal.
## Improvements
- [x] Tests
- [ ] TCP Support
- [x] Options for compression (none, zlib)
- [x] Send timestamp instead of relying on the Graylog server to set it
- [x] Find a better way of pulling the hostname
And probably many more. This is only out here because it might be useful to
someone in its current state. Pull requests are always welcome.
## Notes
Credit where credit is due, this would not exist without
[protofy/erl_graylog_sender](https://github.com/protofy/erl_graylog_sender).
Looking for maintainers if anyone would like to help!
