The netif input plugin gathers network traffic information of the running system every certain interval of time, and reports them.
The Network I/O Metrics plugin creates metrics that are log-based, such as JSON payload. For Prometheus-based metrics, see the Node Exporter Metrics input plugin.
The plugin supports the following configuration parameters:
Interface
Specify the network interface to monitor. e.g. eth0
Interval_Sec
Polling interval (seconds).
1
Interval_NSec
Polling interval (nanosecond).
0
Verbose
If true, gather metrics precisely.
false
Test_At_Init
If true, testing if the network interface is valid at initialization.
false
Threaded
Indicates whether to run this input in its own .
false
In order to monitor network traffic from your system, you can run the plugin from the command line or through the configuration file:
$ bin/fluent-bit -i netif -p interface=eth0 -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
[2017/07/08 23:34:18] [ info] [engine] started
[0] netif.0: [1499524459.001698260, {"eth0.rx.bytes"=>89769869, "eth0.rx.packets"=>73357, "eth0.rx.errors"=>0, "eth0.tx.bytes"=>4256474, "eth0.tx.packets"=>24293, "eth0.tx.errors"=>0}]
[1] netif.0: [1499524460.002541885, {"eth0.rx.bytes"=>98, "eth0.rx.packets"=>1, "eth0.rx.errors"=>0, "eth0.tx.bytes"=>98, "eth0.tx.packets"=>1, "eth0.tx.errors"=>0}]
[2] netif.0: [1499524461.001142161, {"eth0.rx.bytes"=>98, "eth0.rx.packets"=>1, "eth0.rx.errors"=>0, "eth0.tx.bytes"=>98, "eth0.tx.packets"=>1, "eth0.tx.errors"=>0}]
[3] netif.0: [1499524462.002612971, {"eth0.rx.bytes"=>98, "eth0.rx.packets"=>1, "eth0.rx.errors"=>0, "eth0.tx.bytes"=>98, "eth0.tx.packets"=>1, "eth0.tx.errors"=>0}]In your main configuration file append the following Input & Output sections:
[INPUT]
Name netif
Tag netif
Interval_Sec 1
Interval_NSec 0
Interface eth0
[OUTPUT]
Name stdout
Match *pipeline:
inputs:
- name: netif
tag: netif
interval_sec: 1
interval_nsec: 0
interface: eth0
outputs:
- name: stdout
match: '*'Note: Total interval (sec) = Interval_Sec + (Interval_Nsec / 1000000000).
e.g. 1.5s = 1s + 500000000ns