Exec
The exec input plugin, allows to execute external program and collects event logs.
This plugin will not function in the distroless production images (AMD64 currently) as it needs a functional
/bin/sh which is not present. The debug images use the same binaries so even though they have a shell, there is no support for this plugin as it is compiled out.The plugin supports the following configuration parameters:
Key | Description |
|---|---|
Command | The command to execute. |
Parser | Specify the name of a parser to interpret the entry as a structured message. |
Interval_Sec | Polling interval (seconds). |
Interval_NSec | Polling interval (nanosecond). |
Buf_Size | |
Oneshot | Only run once at startup. This allows collection of data precedent to fluent-bit's startup (bool, default: false) |
You can run the plugin from the command line or through the configuration file:
The following example will read events from the output of ls.
$ fluent-bit -i exec -p 'command=ls /var/log' -o stdout
Fluent Bit v1.x.x
* Copyright (C) 2019-2020 The Fluent Bit Authors
* Copyright (C) 2015-2018 Treasure Data
* Fluent Bit is a CNCF sub-project under the umbrella of Fluentd
* https://fluentbit.io
[2018/03/21 17:46:49] [ info] [engine] started
[0] exec.0: [1521622010.013470159, {"exec"=>"ConsoleKit"}]
[1] exec.0: [1521622010.013490313, {"exec"=>"Xorg.0.log"}]
[2] exec.0: [1521622010.013492079, {"exec"=>"Xorg.0.log.old"}]
[3] exec.0: [1521622010.013493443, {"exec"=>"anaconda.ifcfg.log"}]
[4] exec.0: [1521622010.013494707, {"exec"=>"anaconda.log"}]
[5] exec.0: [1521622010.013496016, {"exec"=>"anaconda.program.log"}]
[6] exec.0: [1521622010.013497225, {"exec"=>"anaconda.storage.log"}]
In your main configuration file append the following Input & Output sections:
[INPUT]
Name exec
Tag exec_ls
Command ls /var/log
Interval_Sec 1
Interval_NSec 0
Buf_Size 8mb
Oneshot false
[OUTPUT]
Name stdout
Match *
Last modified 2mo ago