Forward

Forward is the protocol used by Fluent Bit and Fluentd to route messages between peers. This plugin implements the input service to listen for Forward messages.
Configuration Parameters
The plugin supports the following configuration parameters:
Key
Description
Default
Listen
Listener network interface.
0.0.0.0
Port
TCP port to listen for incoming connections.
24224
Unix_Path
Specify the path to unix socket to receive a Forward message. If set, Listen and Port are ignored.
​
Unix_Perm
Set the permission of the unix socket file. If Unix_Path is not set, this parameter is ignored.
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Buffer_Max_Size
Specify the maximum buffer memory size used to receive a Forward message. The value must be according to the Unit Size specification.
6144000
Buffer_Chunk_Size
By default the buffer to store the incoming Forward messages, do not allocate the maximum memory allowed, instead it allocate memory when is required. The rounds of allocations are set by Buffer_Chunk_Size. The value must be according to the Unit Size specification.
1024000
Tag_Prefix
Prefix incoming tag with the defined value.
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Getting Started
In order to receive Forward messages, you can run the plugin from the command line or through the configuration file as shown in the following examples.
Command Line
From the command line you can let Fluent Bit listen for Forward messages with the following options:
$ fluent-bit -i forward -o stdout
By default the service will listen an all interfaces (0.0.0.0) through TCP port 24224, optionally you can change this directly, e.g:
$ fluent-bit -i forward -p listen="192.168.3.2" -p port=9090 -o stdout
In the example the Forward messages will only arrive through network interface under 192.168.3.2 address and TCP Port 9090.
Configuration File
In your main configuration file append the following Input & Output sections:
[INPUT]
    Name              forward
    Listen            0.0.0.0
    Port              24224
    Buffer_Chunk_Size 1M
    Buffer_Max_Size   6M
​
[OUTPUT]
    Name   stdout
    Match  *
Testing
Once Fluent Bit is running, you can send some messages using the fluent-cat tool (this tool is provided by Fluentd:
$ echo '{"key 1": 123456789, "key 2": "abcdefg"}' | fluent-cat my_tag
In Fluent Bit we should see the following output:
$ bin/fluent-bit -i forward -o stdout
Fluent-Bit v0.9.0
Copyright (C) Treasure Data
​
[2016/10/07 21:49:40] [ info] [engine] started
[2016/10/07 21:49:40] [ info] [in_fw] binding 0.0.0.0:24224
[0] my_tag: [1475898594, {"key 1"=>123456789, "key 2"=>"abcdefg"}]

Key	Description	Default
Listen	Listener network interface.	0.0.0.0
Port	TCP port to listen for incoming connections.	24224
Unix_Path	Specify the path to unix socket to receive a Forward message. If set, `Listen` and `Port` are ignored.
Unix_Perm	Set the permission of the unix socket file. If `Unix_Path` is not set, this parameter is ignored.
Buffer_Max_Size	Specify the maximum buffer memory size used to receive a Forward message. The value must be according to the Unit Size specification.	6144000
Buffer_Chunk_Size	By default the buffer to store the incoming Forward messages, do not allocate the maximum memory allowed, instead it allocate memory when is required. The rounds of allocations are set by Buffer_Chunk_Size. The value must be according to the Unit Size specification.	1024000
Tag_Prefix	Prefix incoming tag with the defined value.

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Last modified 4mo ago