Fluentd
0.12
0.12
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On this page
  • Example Configuration
  • Parameters
  • type (required)
  • tag (required)
  • bind
  • source_hostname_key
  • format (required)
  • FAQ
  • How to prevent request drop?

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  1. Input Plugins

udp

Previoussecure_forwardNexttcp

Last updated 5 years ago

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The in_udp Input plugin enables Fluentd to accept UDP payload.

Example Configuration

in_udp is included in Fluentd's core. No additional installation process is required.

<source>
  @type udp
  tag mytag # required
  format /^(?<field1>\d+):(?<field2>\w+)$/ # required
  port 20001 # optional. 5160 by default
  bind 0.0.0.0 # optional. 0.0.0.0 by default
  body_size_limit 1MB # optional. 4096 bytes by default
</source>

Parameters

type (required)

The value must be udp.

tag (required)

tag of output events.

port

The port to listen to. Default Value = 5160

bind

The bind address to listen to. Default Value = 0.0.0.0

source_hostname_key

The field name of the client's hostname. If set the value, the client's hostname will be set to its key. The default is nil (no adding hostname).

If you set following configuration:

source_hostname_key client_host

then the client's hostname is set to client_host field.

{
    ...
    "foo": "bar",
    "client_host": "client.hostname.org"
}

format (required)

log_level option

The log_level option allows the user to set different levels of logging for each plugin. The supported log levels are: fatal, error, warn, info, debug, and trace.

FAQ

How to prevent request drop?

If in_udp gots lots of packets within 1 sec, some packets are dropped. For example, you can see bigger RcvbufErrors number via netstat -su.

Please see the article for the basic structure and syntax of the configuration file.

We've observed the drastic performance improvements on Linux, with proper kernel parameter settings (e.g. `net.core.rmem_max` parameter). If you have high-volume UDP traffic, please make sure to follow the instruction described at .

The format of the UDP payload. in_udp uses parser plugin to parse the payload. See for more detail.

Please see the for further details.

This means in_udp with one process can't handle such traffic. Try to resolve the problem. See for more detail.

If this article is incorrect or outdated, or omits critical information, please . is a open source project under . All components are available under the Apache 2 License.

Config File
Before Installing Fluentd
parser article
logging article
fluent-plugin-multiprocess
issue 1334
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Fluentd
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