IMPORTANT: No additional bug fixes or documentation updates will be released for this version. For the latest information, see the current release documentation.

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zeromq

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zeromq

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This is a community-maintained plugin!

Read events over a 0MQ SUB socket.

You need to have the 0mq 2.1.x library installed to be able to use this input plugin.

The default settings will create a subscriber binding to tcp://127.0.0.1:2120 waiting for connecting publishers.

Synopsis

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This plugin supports the following configuration options:

Required configuration options:

zeromq {
    topology => ...
}

Available configuration options:

Setting	Input type	Required	Default value
`add_field`	hash	No	`{}`
`address`	array	No	`["tcp://*:2120"]`
`codec`	codec	No	`"json"`
`mode`	string, one of `["server", "client"]`	No	`"server"`
`sender`	string	No
`sockopt`	hash	No
`tags`	array	No
`topic`	array	No
`topology`	string, one of `["pushpull", "pubsub", "pair"]`	Yes
`type`	string	No

Details

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`add_field`

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Value type is hash
Default value is {}

Add a field to an event

`address`

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Value type is array
Default value is ["tcp://*:2120"]

0mq socket address to connect or bind Please note that inproc:// will not work with logstash as each we use a context per thread. By default, inputs bind/listen and outputs connect

`codec`

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Value type is codec
Default value is "json"

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.

`mode`

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Value can be any of: server, client
Default value is "server"

mode server mode binds/listens client mode connects

`sender`

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

sender overrides the sender to set the source of the event default is zmq+topology://type/

`sockopt`

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

0mq socket options This exposes zmq_setsockopt for advanced tuning see http://api.zeromq.org/2-1:zmq-setsockopt for details

This is where you would set values like:

ZMQ::HWM - high water mark
ZMQ::IDENTITY - named queues
ZMQ::SWAP_SIZE - space for disk overflow

example: sockopt => ["ZMQ::HWM", 50, "ZMQ::IDENTITY", "my_named_queue"]

`tags`

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

Add any number of arbitrary tags to your event.

This can help with processing later.

`topic`

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

0mq topic This is used for the pubsub topology only On inputs, this allows you to filter messages by topic On outputs, this allows you to tag a message for routing NOTE: ZeroMQ does subscriber side filtering. NOTE: All topics have an implicit wildcard at the end You can specify multiple topics here

`topology`

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This is a required setting.
Value can be any of: pushpull, pubsub, pair
There is no default value for this setting.

0mq topology The default logstash topologies work as follows:

pushpull - inputs are pull, outputs are push
pubsub - inputs are subscribers, outputs are publishers
pair - inputs are clients, inputs are servers

If the predefined topology flows don’t work for you, you can change the mode setting TODO (lusis) add req/rep MAYBE TODO (lusis) add router/dealer

`type`

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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 Kibana.

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.

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