Process input plugin allows you to check how health a process is. It does the check by issuing a process every a certain interval of time.

Configuration Parameters

The plugin supports the following configuration parameters:
Name of the target Process to check.
Interval in seconds between the service checks. Default value is 1.
Specify a nanoseconds interval for service checks, it works in conjuntion with the Interval_Sec configuration key. Default value is 0.
If enabled, it will only generate messages if the target process is down. By default this option is disabled.
If enabled, a number of fd is appended to each records. Default value is true.
If enabled, memory usage of the process is appended to each records. Default value is true.

Getting Started

In order to start performing the checks, you can run the plugin from the command line or through the configuration file:
The following example will check the health of crond process.
$ fluent-bit -i proc -p proc_name=crond -o stdout

Configuration File

In your main configuration file append the following Input & Output sections:
Name proc
Proc_Name crond
Interval_Sec 1
Interval_NSec 0
Fd true
Mem true
Name stdout
Match *


Once Fluent Bit is running, you will see the health of process:
$ fluent-bit -i proc -p proc_name=fluent-bit -o stdout
Fluent-Bit v0.11.0
Copyright (C) Treasure Data
[2017/01/30 21:44:56] [ info] [engine] started
[0] proc.0: [1485780297, {"alive"=>true, "proc_name"=>"fluent-bit", "pid"=>10964, "mem.VmPeak"=>14740000, "mem.VmSize"=>14740000, "mem.VmLck"=>0, "mem.VmHWM"=>1120000, "mem.VmRSS"=>1120000, "mem.VmData"=>2276000, "mem.VmStk"=>88000, "mem.VmExe"=>1768000, "mem.VmLib"=>2328000, "mem.VmPTE"=>68000, "mem.VmSwap"=>0, "fd"=>18}]
[1] proc.0: [1485780298, {"alive"=>true, "proc_name"=>"fluent-bit", "pid"=>10964, "mem.VmPeak"=>14740000, "mem.VmSize"=>14740000, "mem.VmLck"=>0, "mem.VmHWM"=>1148000, "mem.VmRSS"=>1148000, "mem.VmData"=>2276000, "mem.VmStk"=>88000, "mem.VmExe"=>1768000, "mem.VmLib"=>2328000, "mem.VmPTE"=>68000, "mem.VmSwap"=>0, "fd"=>18}]
[2] proc.0: [1485780299, {"alive"=>true, "proc_name"=>"fluent-bit", "pid"=>10964, "mem.VmPeak"=>14740000, "mem.VmSize"=>14740000, "mem.VmLck"=>0, "mem.VmHWM"=>1152000, "mem.VmRSS"=>1148000, "mem.VmData"=>2276000, "mem.VmStk"=>88000, "mem.VmExe"=>1768000, "mem.VmLib"=>2328000, "mem.VmPTE"=>68000, "mem.VmSwap"=>0, "fd"=>18}]
[3] proc.0: [1485780300, {"alive"=>true, "proc_name"=>"fluent-bit", "pid"=>10964, "mem.VmPeak"=>14740000, "mem.VmSize"=>14740000, "mem.VmLck"=>0, "mem.VmHWM"=>1152000, "mem.VmRSS"=>1148000, "mem.VmData"=>2276000, "mem.VmStk"=>88000, "mem.VmExe"=>1768000, "mem.VmLib"=>2328000, "mem.VmPTE"=>68000, "mem.VmSwap"=>0, "fd"=>18}]