Process Log Based Metrics

Process input plugin allows you to check how healthy a process is. It does so by performing a service check at every certain interval of time specified by the user.

The Process metrics plugin creates metrics that are log-based (I.e. JSON payload). If you are looking for Prometheus-based metrics please see the Node Exporter Metrics input plugin.

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 conjunction 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.

$ calyptia-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 Calyptia Fluent Bit is running, you will see the health of process:

$ calyptia-fluent-bit -i proc -p proc_name=fluent-bit -o stdout
Calyptia Fluent Bit 20.10.03

[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}]

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