Fluentd
1.0
1.0
  • Introduction
  • Overview
    • Life of a Fluentd event
    • Support
    • FAQ
    • Logo
    • fluent-package v5 vs td-agent v4
  • Installation
    • Before Installation
    • Install fluent-package
      • RPM Package (Red Hat Linux)
      • DEB Package (Debian/Ubuntu)
      • .dmg Package (macOS)
      • .msi Installer (Windows)
    • Install calyptia-fluentd
      • RPM Package (Red Hat Linux)
      • DEB Package (Debian/Ubuntu)
      • .dmg Package (macOS)
      • .msi Installer (Windows)
    • Install by Ruby Gem
    • Install from Source
    • Post Installation Guide
    • Obsolete Installation
      • Treasure Agent v4 (EOL) Installation
        • Install by RPM Package v4 (Red Hat Linux)
        • Install by DEB Package v4 (Debian/Ubuntu)
        • Install by .dmg Package v4 (macOS)
        • Install by .msi Installer v4 (Windows)
      • Treasure Agent v3 (EOL) Installation
        • Install by RPM Package v3 (Red Hat Linux)
        • Install by DEB Package v3 (Debian/Ubuntu)
        • Install by .dmg Package v3 (macOS)
        • Install by .msi Installer v3 (Windows)
  • Configuration
    • Config File Syntax
    • Config File Syntax (YAML)
    • Routing Examples
    • Config: Common Parameters
    • Config: Parse Section
    • Config: Buffer Section
    • Config: Format Section
    • Config: Extract Section
    • Config: Inject Section
    • Config: Transport Section
    • Config: Storage Section
    • Config: Service Discovery Section
  • Deployment
    • System Configuration
    • Logging
    • Signals
    • RPC
    • High Availability Config
    • Performance Tuning
    • Multi Process Workers
    • Failure Scenarios
    • Plugin Management
    • Trouble Shooting
    • Fluentd UI
    • Linux Capability
    • Command Line Option
    • Source Only Mode
    • Zero-downtime restart
  • Container Deployment
    • Docker Image
    • Docker Logging Driver
    • Docker Compose
    • Kubernetes
  • Monitoring Fluentd
    • Overview
    • Monitoring by Prometheus
    • Monitoring by REST API
  • Input Plugins
    • tail
    • forward
    • udp
    • tcp
    • unix
    • http
    • syslog
    • exec
    • sample
    • monitor_agent
    • windows_eventlog
  • Output Plugins
    • file
    • forward
    • http
    • exec
    • exec_filter
    • secondary_file
    • copy
    • relabel
    • roundrobin
    • stdout
    • null
    • s3
    • kafka
    • elasticsearch
    • opensearch
    • mongo
    • mongo_replset
    • rewrite_tag_filter
    • webhdfs
    • buffer
  • Filter Plugins
    • record_transformer
    • grep
    • parser
    • geoip
    • stdout
  • Parser Plugins
    • regexp
    • apache2
    • apache_error
    • nginx
    • syslog
    • ltsv
    • csv
    • tsv
    • json
    • msgpack
    • multiline
    • none
  • Formatter Plugins
    • out_file
    • json
    • ltsv
    • csv
    • msgpack
    • hash
    • single_value
    • stdout
    • tsv
  • Buffer Plugins
    • memory
    • file
    • file_single
  • Storage Plugins
    • local
  • Service Discovery Plugins
    • static
    • file
    • srv
  • Metrics Plugins
    • local
  • How-to Guides
    • Stream Analytics with Materialize
    • Send Apache Logs to S3
    • Send Apache Logs to Minio
    • Send Apache Logs to Mongodb
    • Send Syslog Data to Graylog
    • Send Syslog Data to InfluxDB
    • Send Syslog Data to Sematext
    • Data Analytics with Treasure Data
    • Data Collection with Hadoop (HDFS)
    • Simple Stream Processing with Fluentd
    • Stream Processing with Norikra
    • Stream Processing with Kinesis
    • Free Alternative To Splunk
    • Email Alerting like Splunk
    • How to Parse Syslog Messages
    • Cloud Data Logging with Raspberry Pi
  • Language Bindings
    • Java
    • Ruby
    • Python
    • Perl
    • PHP
    • Nodejs
    • Scala
  • Plugin Development
    • How to Write Input Plugin
    • How to Write Base Plugin
    • How to Write Buffer Plugin
    • How to Write Filter Plugin
    • How to Write Formatter Plugin
    • How to Write Output Plugin
    • How to Write Parser Plugin
    • How to Write Storage Plugin
    • How to Write Service Discovery Plugin
    • How to Write Tests for Plugin
    • Configuration Parameter Types
    • Upgrade Plugin from v0.12
  • Plugin Helper API
    • Plugin Helper: Child Process
    • Plugin Helper: Compat Parameters
    • Plugin Helper: Event Emitter
    • Plugin Helper: Event Loop
    • Plugin Helper: Extract
    • Plugin Helper: Formatter
    • Plugin Helper: Inject
    • Plugin Helper: Parser
    • Plugin Helper: Record Accessor
    • Plugin Helper: Server
    • Plugin Helper: Socket
    • Plugin Helper: Storage
    • Plugin Helper: Thread
    • Plugin Helper: Timer
    • Plugin Helper: Http Server
    • Plugin Helper: Service Discovery
  • Troubleshooting Guide
  • Appendix
    • Update from v0.12 to v1
    • td-agent v2 vs v3 vs v4
Powered by GitBook
On this page
  • Why Fluentd with MongoDB?
  • Install
  • Example Configuration
  • Parameters
  • @type
  • connection_string (required)
  • host
  • port (required)
  • database (required)
  • collection (required, if not tag_mapped)
  • capped
  • user
  • password
  • time_key
  • tag_mapped
  • Common Output / Buffer parameters
  • Further Reading

Was this helpful?

  1. Output Plugins

mongo

PreviousopensearchNextmongo_replset

Last updated 4 months ago

Was this helpful?

The out_mongo Output plugin writes records into , the emerging document-oriented database system.

If you're using ReplicaSet, please see the article instead.

This document does not describe all the parameters. For details, check the Further Reading section.

Why Fluentd with MongoDB?

Fluentd enables your apps to insert records to MongoDB asynchronously with batch-insertion, unlike direct insertion of records from your apps. This has the following advantages:

  1. less impact on application performance

  2. higher MongoDB insertion throughput while maintaining JSON record structure

Install

out_mongo is not included in fluent-package, by default. Fluentd gem users will need to install the fluent-plugin-mongo gem using the following command:

$ sudo fluent-gem install fluent-plugin-mongo

Example Configuration

# Single MongoDB
<match mongo.**>
  @type mongo
  host fluentd
  port 27017
  database fluentd
  collection test

  # for capped collection
  capped
  capped_size 1024m

  # authentication
  user michael
  password jordan

  <inject>
    # key name of timestamp
    time_key time
  </inject>

  <buffer>
    # flush
    flush_interval 10s
  </buffer>
</match>

Parameters

@type

The value must be mongo.

connection_string (required)

type
default
version

string

nil

1.0.0

The MongoDB connection string for URI.

host

type
default
version

string

'localhost'

1.0.0

The MongoDB hostname.

port (required)

type
default
version

integer

27017

1.0.0

The MongoDB port.

database (required)

type
default
version

string

nil

1.0.0

The database name.

collection (required, if not tag_mapped)

type
default
version

string

'untagged' or required parameter if not tag_mapped

1.0.0

The collection name.

capped

type
default
version

string

optional

1.0.0

This option enables the capped collection. This is always recommended because MongoDB is not suited for storing large amounts of historical data.

capped_size

type
default
version

size

optional

1.0.0

Sets the capped collection size.

user

type
default
version

string

nil

1.0.0

The username to use for authentication.

password

type
default
version

string

nil

1.0.0

The password to use for authentication.

time_key

type
default
version

string

time

1.0.0

The key name of timestamp.

tag_mapped

type
default
version

bool

false

1.0.0

This option allows out_mongo to use Fluentd's tag to determine the destination collection.

For example, if you generate records with tags mongo.foo, the records will be inserted into the foo collection within the fluentd database:

<match mongo.*>
  @type mongo
  host fluentd
  port 27017
  database fluentd

  # Set 'tag_mapped' if you want to use tag mapped mode.
  tag_mapped

  # If the tag is "mongo.foo", then the prefix "mongo." is removed.
  # The inserted collection name is "foo".
  remove_tag_prefix mongo.

  # This configuration is used if the tag is not found. The default is 'untagged'.
  collection misc
</match>

This option is useful for flexible log collection.

Common Output / Buffer parameters

For common output / buffer parameters, please check the following articles:

Further Reading

For more details, see .

Please see the article for real-world use cases.

Please see the article for the basic structure and syntax of the configuration file.

For <buffer>, refer to .

If this article is incorrect or outdated, or omits critical information, please . is an open-source project under . All components are available under the Apache 2 License.

Plugin Management
Store Apache Logs into MongoDB
Configuration File
Buffer Section Configuration
Output Plugin Overview
Buffer Section Configuration
fluent-plugin-mongo
let us know
Fluentd
Cloud Native Computing Foundation (CNCF)
MongoDB
out_mongo_replset