Coralogix provides seamless integration with Fluent-Bit so you can send your logs from anywhere and parse them according to your needs.


  • Have Fluent-Bit installed, for more information on how to implement: Fluent-Bit installation docs.
  • Have Coralogix output plugin installed.


You must provide the following four variables when creating a Coralogix logger instance.

Private Key – A unique ID that represents your company, this Id will be sent to your mail once you register to Coralogix.

Application Name – The name of your main application, for example, a company named “SuperData” would probably insert the “SuperData” string parameter or if they want to debug their test environment they might insert the “SuperData– Test”.

SubSystem Name – Your application probably has multiple subsystems, for example, Backend servers, Middleware, Frontend servers, etc. in order to help you examine the data you need, inserting the subsystem parameter is vital.


$ wget -o /fluent-bit/plugins/



Open your Fluent-Bit configuration file and add Coralogix output:

    Name mem
    Tag memory

    Name        coralogix
    Match       *
    Private_Key YOUR_PRIVATE_KEY
    App_Name    APP_NAME
    Sub_Name    SUB_NAME

The first four keys (Private_key, Company_id, App_name, Sub_name) are mandatory.

Application and subsystem name

If you wish to set your application and subsystem names to a fixed value, in your config file use App_Name and Sub_Name as described above. In case your input stream is a JSON object, you can extract APP_NAME and/or SUB_NAME from the JSON using the App_Name_Key and Sub_Name_Key options in your config file instead of App_Name and Sub_Name:


For instance, with the bellow JSON App_Name_Key application will extract testApp into Coralogix applicationName.

    "application": "testApp",
    "subsystem": "testSub",
    "code": "200",
    "stream": "stdout",
    "timestamp": "2016-07-20T17:05:17.743Z",
    "message": "hello_world",

*Note – nested JSONs are also supported so you can extract into App_Name_Key and/or Sub_Name_Key nested values, e.g. App_Name_Key log.application.

Record content

In case your input stream is a JSON object and you don’t want to send the entire JSON, rather just a portion of it, you can add the Log_Key parameter, in your Fluent-Bit configuration file–>output section, with the name of the key you want to send. For instance, with the above example, if you write:

Log_Key message

then only the key message will be sent. If you do want to send the entire JSON then you can just delete this parameter from your configuration file.


If you want to use some field as timestamp in Coralogix, you can use Time_Key option:

Time_Key timestamp

then you will see that logs records have timestamp from this field.

Note: We accept only logs that are not older than 24 hours.


On host machine

To start Fluent-Bit with Coralogix output plugin, execute:

$ fluent-bit -e /fluent-bit/plugins/ -c /fluent-bit/etc/fluent-bit.conf

or add Coralogix output plugin to /fluent-bit/etc/plugins.conf file:

    Path /fluent-bit/plugins/


Build a Docker image with your fluent-bit.conf:

FROM golang:alpine AS builder
RUN apk add --no-cache gcc libc-dev git
WORKDIR /go/src/app
RUN wget && \
    echo "    Path /fluent-bit/plugins/" | tee -a plugins.conf
RUN wget && \
    go get . && \
    go build -buildmode=c-shared -o .

FROM fluent/fluent-bit:1.4
MAINTAINER Coralogix Inc. <>
LABEL Description="Special Fluent-Bit image for Coralogix integration" Vendor="Coralogix Inc." Version="1.0.0"
COPY --from=builder /lib/* /lib/x86_64-linux-gnu/
COPY --from=builder /go/src/app/ /fluent-bit/plugins/
COPY --from=builder /go/src/app/plugins.conf /fluent-bit/etc/
COPY fluent-bit.conf /fluent-bit/etc/

Before deploying your container don’t forget to mount volume with your logs.



  • Linux x64
  • Go version >= 1.11.x


You can download sources here.


$ cd plugin/
$ make

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