Fluent Bit: Official Manual
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1.8
1.8
  • Fluent Bit v1.8 Documentation
  • About
    • What is Fluent Bit ?
    • A Brief History of Fluent Bit
    • Fluentd & Fluent Bit
    • License
  • Concepts
    • Key Concepts
    • Buffering
    • Data Pipeline
      • Input
      • Parser
      • Filter
      • Buffer
      • Router
      • Output
  • Installation
    • Getting Started with Fluent Bit
    • Upgrade Notes
    • Supported Platforms
    • Requirements
    • Sources
      • Download Source Code
      • Build and Install
      • Build with Static Configuration
    • Linux Packages
      • Amazon Linux
      • Redhat / CentOS
      • Debian
      • Ubuntu
      • Raspbian / Raspberry Pi
    • Docker
    • Containers on AWS
    • Amazon EC2
    • Kubernetes
    • Yocto / Embedded Linux
    • Windows
  • Administration
    • Configuring Fluent Bit
      • Format and Schema
      • Configuration File
      • Variables
      • Commands
      • Upstream Servers
      • Unit Sizes
      • Multiline Parsing
      • Record Accessor
    • Security
    • Buffering & Storage
    • Backpressure
    • Scheduling and Retries
    • Networking
    • Memory Management
    • Monitoring
    • Dump Internals / Signal
    • HTTP Proxy
  • Local Testing
    • Validating your Data and Structure
    • Running a Logging Pipeline Locally
  • Data Pipeline
    • Pipeline Monitoring
    • Inputs
      • Node Exporter Metrics
      • Collectd
      • CPU Metrics
      • Disk I/O Metrics
      • Docker Metrics
      • Docker Events
      • Dummy
      • Exec
      • Fluent Bit Metrics
      • Forward
      • Head
      • HTTP
      • Health
      • Kernel Logs
      • Memory Metrics
      • MQTT
      • Network I/O Metrics
      • Process Metrics
      • Random
      • Serial Interface
      • Standard Input
      • StatsD
      • Syslog
      • Systemd
      • Tail
      • TCP
      • Thermal
      • Windows Event Log
    • Parsers
      • Configuring Parser
      • JSON
      • Regular Expression
      • LTSV
      • Logfmt
      • Decoders
    • Filters
      • AWS Metadata
      • CheckList
      • Expect
      • GeoIP2 Filter
      • Grep
      • Kubernetes
      • Lua
      • Parser
      • Record Modifier
      • Modify
      • Multiline
      • Nest
      • Rewrite Tag
      • Standard Output
      • Throttle
      • Tensorflow
    • Outputs
      • Prometheus Exporter
      • Prometheus Remote Write
      • Amazon CloudWatch
      • Amazon Kinesis Data Firehose
      • Amazon Kinesis Data Streams
      • Amazon S3
      • Azure Log Analytics
      • Azure Blob
      • Google Cloud BigQuery
      • Counter
      • Datadog
      • Elasticsearch
      • File
      • FlowCounter
      • Forward
      • GELF
      • HTTP
      • InfluxDB
      • Kafka
      • Kafka REST Proxy
      • LogDNA
      • Loki
      • NATS
      • New Relic
      • NULL
      • PostgreSQL
      • Slack
      • Stackdriver
      • Standard Output
      • Splunk
      • Syslog
      • TCP & TLS
      • Treasure Data
      • WebSocket
  • Stream Processing
    • Introduction to Stream Processing
    • Overview
    • Changelog
    • Getting Started
      • Fluent Bit + SQL
      • Check Keys and NULL values
      • Hands On! 101
  • Fluent Bit for Developers
    • C Library API
    • Ingest Records Manually
    • Golang Output Plugins
    • Developer guide for beginners on contributing to Fluent Bit
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  1. Data Pipeline
  2. Outputs

Prometheus Exporter

An output plugin to expose Prometheus Metrics

The prometheus exporter allows you to take metrics from Fluent Bit and expose them such that a Prometheus instance can scrape them.

Important Note: The prometheus exporter only works with metric plugins, such as Node Exporter Metrics

Key
Description
Default

host

This is address Fluent Bit will bind to when hosting prometheus metrics. Note: listen parameter is deprecated from v1.9.0.

0.0.0.0

port

This is the port Fluent Bit will bind to when hosting prometheus metrics

2021

add_label

This allows you to add custom labels to all metrics exposed through the prometheus exporter. You may have multiple of these fields

Getting Started

The Prometheus exporter only works with metrics captured from metric plugins. In the following example, host metrics are captured by the node exporter metrics plugin and then are routed to prometheus exporter. Within the output plugin two labels are added app="fluent-bit"and color="blue"

# Node Exporter Metrics + Prometheus Exporter
# -------------------------------------------
# The following example collect host metrics on Linux and expose
# them through a Prometheus HTTP end-point.
#
# After starting the service try it with:
#
# $ curl http://127.0.0.1:2021/metrics
#
[SERVICE]
    flush           1
    log_level       info

[INPUT]
    name            node_exporter_metrics
    tag             node_metrics
    scrape_interval 2

[OUTPUT]
    name            prometheus_exporter
    match           node_metrics
    host            0.0.0.0
    port            2021
    # add user-defined labels
    add_label       app fluent-bit
    add_label       color blue

Last updated 3 years ago

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