Process

Process input plugin allows you to check how healthy a process is. It does the check by periodically issuing messages with a few metrics related to the process.

Configuration Parameters

The plugin supports the following configuration parameters:

Key Description
Proc_Name Name of the target Process to check.
Interval_Sec Interval in seconds between the service checks. Default value is 1.
Internal_Nsec Specify a nanoseconds interval for service checks, it works in conjuntion with the Interval_Sec configuration key. Default value is 0.
Alert If enabled, it will only generate messages if the target process is down. By default this option is disabled.
Fd If enabled, the number of file descriptors of the process is appended to each records. Default value is true.
Mem 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.

  1. $ fluent-bit -i proc -p proc_name=crond -o stdout

Configuration File

In your main configuration file append the following Input & Output sections:

  1. [INPUT]
  2.     Name          proc
  3.     Proc_Name     crond
  4.     Interval_Sec  1
  5.     Interval_NSec 0
  6.     Fd            true
  7.     Mem           true
  9. [OUTPUT]
  10.     Name   stdout
  11.     Match  *

Testing

Once Fluent Bit is running, you will see the health of process:

  1. $ fluent-bit -i proc -p proc_name=fluent-bit -o stdout
  2. Fluent Bit v1.x.x
  3. * Copyright (C) 2019-2020 The Fluent Bit Authors
  4. * Copyright (C) 2015-2018 Treasure Data
  5. * Fluent Bit is a CNCF sub-project under the umbrella of Fluentd
  6. * https://fluentbit.io
  8. [2017/01/30 21:44:56] [ info] [engine] started
  9. [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}]
  10. [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}]
  11. [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}]
  12. [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}]