Elasticsearch

The es output plugin, allows to flush your records into a Elasticsearch database. The following instructions assumes that you have a fully operational Elasticsearch service running in your environment.

Configuration Parameters

Key Description default
Host IP address or hostname of the target Elasticsearch instance 127.0.0.1
Port TCP port of the target Elasticsearch instance 9200
HTTP_User Optional username credential for Elastic X-Pack access
HTTP_Passwd Password for user defined in HTTP_User
Index Index name fluentbit
Type Type name flb_type
Logstash_Format Enable Logstash format compatibility. This option takes a boolean value: True/False, On/Off Off
Logstash_Prefix When enabling Logstash_Format, the Index name is composed using a prefix and the date, e.g: If Logstash_Prefix is equals to 'mydata' your index will become 'mydata-YYYY.MM.DD'. The last string appended belongs to the date when the data is being generated. logstash
Logstash_DateFormat Time format (based on strftime) to generate the second part of the Index name. %Y.%m.%d
Time_Key When Logstash_Format is enabled, each record will get a new timestamp field. The Time_Key property defines the name of that field. @timestamp
Time_Key_Format When Logstash_Format is enabled, this property defines the format of the timestamp. %Y-%m-%dT%H:%M:%S
Include_Tag_Key When enabled, it append the Tag name to the record. Off
Tag_Key If Include_Tag_Key is enabled, this property defines the key name for the tag. _flb-key

The parameters index and type can be confusing if you are new to Elastic, if you have used a common relational database before, they can be compared to the database and table concepts.

TLS / SSL

Elasticsearch output plugin supports TTL/SSL, for more details about the properties available and general configuration, please refer to the TLS/SSL section.

Getting Started

In order to insert records into a Elasticsearch service, you can run the plugin from the command line or through the configuration file:

Command Line

The es plugin, can read the parameters from the command line in two ways, through the -p argument (property) or setting them directly through the service URI. The URI format is the following:

es://host:port/index/type

Using the format specified, you could start Fluent Bit through:

$ fluent-bit -i cpu -t cpu -o es://192.168.2.3:9200/my_index/my_type \
    -o stdout -m '*'

which is similar to do:

$ fluent-bit -i cpu -t cpu -o es -p Host=192.168.2.3 -p Port=9200 \
    -p Index=my_index -p Type=my_type -o stdout -m '*'

Configuration File

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

[INPUT]
    Name  cpu
    Tag   cpu

[OUTPUT]
    Name  es
    Match *
    Host  192.168.2.3
    Port  9200
    Index my_index
    Type  my_type

About Elasticsearch field names

Some input plugins may generate messages where the field names contains dots, since Elasticsearch 2.0 this is not longer allowed, so the current es plugin replaces them with an underscore, e.g:

{"cpu0.p_cpu"=>17.000000}

becomes

{"cpu0_p_cpu"=>17.000000}

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