udp

Milestone: 2

Read messages as events over the network via udp. The only required configuration item is port, which specifies the udp port logstash will listen on for event streams.

Synopsis

This is what it might look like in your config file:

input {
  udp {
    add_field => ... # hash (optional), default: {}
    buffer_size => ... # number (optional), default: 8192
    codec => ... # codec (optional), default: "plain"
    host => ... # string (optional), default: "0.0.0.0"
    port => ... # number (required)
    queue_size => ... # number (optional), default: 2000
    tags => ... # array (optional)
    type => ... # string (optional)
    workers => ... # number (optional), default: 2
  }
}

Details

add_field

Value type is hash
Default value is {}

Add a field to an event

buffer_size

Value type is number
Default value is 8192

The maximum packet size to read from the network

charset DEPRECATED

DEPRECATED WARNING: This config item is deprecated. It may be removed in a further version.
Value can be any of: "ASCII-8BIT", "Big5", "Big5-HKSCS", "Big5-UAO", "CP949", "Emacs-Mule", "EUC-JP", "EUC-KR", "EUC-TW", "GB18030", "GBK", "ISO-8859-1", "ISO-8859-2", "ISO-8859-3", "ISO-8859-4", "ISO-8859-5", "ISO-8859-6", "ISO-8859-7", "ISO-8859-8", "ISO-8859-9", "ISO-8859-10", "ISO-8859-11", "ISO-8859-13", "ISO-8859-14", "ISO-8859-15", "ISO-8859-16", "KOI8-R", "KOI8-U", "Shift_JIS", "US-ASCII", "UTF-8", "UTF-16BE", "UTF-16LE", "UTF-32BE", "UTF-32LE", "Windows-1251", "GB2312", "IBM437", "IBM737", "IBM775", "CP850", "IBM852", "CP852", "IBM855", "CP855", "IBM857", "IBM860", "IBM861", "IBM862", "IBM863", "IBM864", "IBM865", "IBM866", "IBM869", "Windows-1258", "GB1988", "macCentEuro", "macCroatian", "macCyrillic", "macGreek", "macIceland", "macRoman", "macRomania", "macThai", "macTurkish", "macUkraine", "CP950", "CP951", "stateless-ISO-2022-JP", "eucJP-ms", "CP51932", "GB12345", "ISO-2022-JP", "ISO-2022-JP-2", "CP50220", "CP50221", "Windows-1252", "Windows-1250", "Windows-1256", "Windows-1253", "Windows-1255", "Windows-1254", "TIS-620", "Windows-874", "Windows-1257", "Windows-31J", "MacJapanese", "UTF-7", "UTF8-MAC", "UTF-16", "UTF-32", "UTF8-DoCoMo", "SJIS-DoCoMo", "UTF8-KDDI", "SJIS-KDDI", "ISO-2022-JP-KDDI", "stateless-ISO-2022-JP-KDDI", "UTF8-SoftBank", "SJIS-SoftBank", "BINARY", "CP437", "CP737", "CP775", "IBM850", "CP857", "CP860", "CP861", "CP862", "CP863", "CP864", "CP865", "CP866", "CP869", "CP1258", "Big5-HKSCS:2008", "eucJP", "euc-jp-ms", "eucKR", "eucTW", "EUC-CN", "eucCN", "CP936", "ISO2022-JP", "ISO2022-JP2", "ISO8859-1", "CP1252", "ISO8859-2", "CP1250", "ISO8859-3", "ISO8859-4", "ISO8859-5", "ISO8859-6", "CP1256", "ISO8859-7", "CP1253", "ISO8859-8", "CP1255", "ISO8859-9", "CP1254", "ISO8859-10", "ISO8859-11", "CP874", "ISO8859-13", "CP1257", "ISO8859-14", "ISO8859-15", "ISO8859-16", "CP878", "CP932", "csWindows31J", "SJIS", "PCK", "MacJapan", "ASCII", "ANSI_X3.4-1968", "646", "CP65000", "CP65001", "UTF-8-MAC", "UTF-8-HFS", "UCS-2BE", "UCS-4BE", "UCS-4LE", "CP1251", "external", "locale"
There is no default value for this setting.

The character encoding used in this input. Examples include “UTF-8” and “cp1252”

This setting is useful if your log files are in Latin-1 (aka cp1252) or in another character set other than UTF-8.

This only affects “plain” format logs since json is UTF-8 already.

codec

Value type is codec
Default value is "plain"

The codec used for input data. Input codecs are a convenient method for decoding your data before it enters the input, without needing a separate filter in your Logstash pipeline.

debug DEPRECATED

DEPRECATED WARNING: This config item is deprecated. It may be removed in a further version.
Value type is boolean
Default value is false

format DEPRECATED

DEPRECATED WARNING: This config item is deprecated. It may be removed in a further version.
Value can be any of: "plain", "json", "json_event", "msgpack_event"
There is no default value for this setting.

The format of input data (plain, json, json_event)

host

Value type is string
Default value is "0.0.0.0"

The address which logstash will listen on.

message_format DEPRECATED

DEPRECATED WARNING: This config item is deprecated. It may be removed in a further version.
Value type is string
There is no default value for this setting.

If format is “json”, an event sprintf string to build what the display @message should be given (defaults to the raw JSON). sprintf format strings look like %{fieldname}

If format is “json_event”, ALL fields except for @type are expected to be present. Not receiving all fields will cause unexpected results.

port (required setting)

Value type is number
There is no default value for this setting.

The port which logstash will listen on. Remember that ports less than 1024 (privileged ports) may require root or elevated privileges to use.

queue_size

Value type is number
Default value is 2000

This is the number of unprocessed UDP packets you can hold in memory before packets will start dropping.

type

Value type is string
There is no default value for this setting.

Add a ‘type’ field to all events handled by this input.

Types are used mainly for filter activation.

The type is stored as part of the event itself, so you can also use the type to search for it in the web interface.

If you try to set a type on an event that already has one (for example when you send an event from a shipper to an indexer) then a new input will not override the existing type. A type set at the shipper stays with that event for its life even when sent to another Logstash server.

workers

Value type is number
Default value is 2

Number of threads processing packets

This is documentation from lib/logstash/inputs/udp.rb