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macOS

Fluent Bit is compatible with latest Apple macOS system on x86_64 and Apple Silicon architectures.

Installation Packages

The packages can be found here: https://packages.fluentbit.io/macos/

Requirements

For the next steps, you will need to have Homebrew installed in your system. If is not there, you can install it with the following command:

/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"

Installing from Homebrew

The Fluent Bit package on Homebrew is not officially supported, but should work for basic use cases and testing. It can be installed using:

brew install fluent-bit

Compile from Source

Install build dependencies

Run the following brew command in your terminal to retrieve the dependencies:

brew install git cmake openssl bison

Get the source and build it

Grab a fresh copy of the Fluent Bit source code (upstream):

git clone https://github.com/fluent/fluent-bit
cd fluent-bit

Optionally, if you want to use a specific version, just checkout to the proper tag. If you want to use v1.8.13 just do:

git checkout v1.8.13

In order to prepare the build system, we need to expose certain environment variables so Fluent Bit CMake build rules can pick the right libraries:

export OPENSSL_ROOT_DIR=`brew --prefix openssl`
export PATH=`brew --prefix bison`/bin:$PATH

Change to the build/ directory inside the Fluent Bit sources:

cd build/

Build Fluent Bit. Note that we are indicating to the build system "where" the final binaries and config files should be installed:

cmake -DFLB_DEV=on -DCMAKE_INSTALL_PREFIX=/opt/fluent-bit ../
make -j 16

Install Fluent Bit to the directory specified above. Note that this requires root privileges due to the directory we will write information to:

sudo make install

The binaries and configuration examples can be located at /opt/fluent-bit/.

Create macOS installer from source

Grab a fresh copy of the Fluent Bit source code (upstream):

git clone https://github.com/fluent/fluent-bit
cd fluent-bit

Optionally, if you want to use a specific version, just checkout to the proper tag. If you want to use v1.9.2 just do:

git checkout v1.9.2

In order to prepare the build system, we need to expose certain environment variables so Fluent Bit CMake build rules can pick the right libraries:

export OPENSSL_ROOT_DIR=`brew --prefix openssl`
export PATH=`brew --prefix bison`/bin:$PATH

And then, creating the specific macOS SDK target (For example, specifying macOS Big Sur (11.3) SDK environment):

export MACOSX_DEPLOYMENT_TARGET=11.3

Change to the build/ directory inside the Fluent Bit sources:

cd build/

Build the Fluent Bit macOS installer.

cmake -DCPACK_GENERATOR=productbuild -DCMAKE_INSTALL_PREFIX=/opt/fluent-bit ../
make -j 16
cpack -G productbuild

Then, macOS installer will be generated as:

CPack: Create package using productbuild
CPack: Install projects
CPack: - Run preinstall target for: fluent-bit
CPack: - Install project: fluent-bit []
CPack: -   Install component: binary
CPack: -   Install component: library
CPack: -   Install component: headers
CPack: -   Install component: headers-extra
CPack: Create package
CPack: -   Building component package: /Users/fluent-bit-builder/GitHub/fluent-bit/build/_CPack_Packages/Darwin/productbuild//Users/fluent-bit-builder/GitHub/fluent-bit/build/fluent-bit-1.9.2-apple/Contents/Packages/fluent-bit-1.9.2-apple-binary.pkg
CPack: -   Building component package: /Users/fluent-bit-builder/GitHub/fluent-bit/build/_CPack_Packages/Darwin/productbuild//Users/fluent-bit-builder/GitHub/fluent-bit/build/fluent-bit-1.9.2-apple/Contents/Packages/fluent-bit-1.9.2-apple-headers.pkg
CPack: -   Building component package: /Users/fluent-bit-builder/GitHub/fluent-bit/build/_CPack_Packages/Darwin/productbuild//Users/fluent-bit-builder/GitHub/fluent-bit/build/fluent-bit-1.9.2-apple/Contents/Packages/fluent-bit-1.9.2-apple-headers-extra.pkg
CPack: -   Building component package: /Users/fluent-bit-builder/GitHub/fluent-bit/build/_CPack_Packages/Darwin/productbuild//Users/fluent-bit-builder/GitHub/fluent-bit/build/fluent-bit-1.9.2-apple/Contents/Packages/fluent-bit-1.9.2-apple-library.pkg
CPack: - package: /Users/fluent-bit-builder/GitHub/fluent-bit/build/fluent-bit-1.9.2-apple.pkg generated.

Finally, fluent-bit-<fluent-bit version>-(intel or apple).pkg will be generated.

The created installer will put binaries at /opt/fluent-bit/.

Running Fluent Bit

To make the access path easier to Fluent Bit binary, in your terminal extend the PATH variable:

export PATH=/opt/fluent-bit/bin:$PATH

Now as a simple test, try Fluent Bit by generating a simple dummy message which will be printed to the standard output interface every 1 second:

 fluent-bit -i dummy -o stdout -f 1

You will see an output similar to this:

Fluent Bit v1.9.0
* Copyright (C) 2015-2021 The Fluent Bit Authors
* Fluent Bit is a CNCF sub-project under the umbrella of Fluentd
* https://fluentbit.io

[2022/02/08 17:13:52] [ info] [engine] started (pid=14160)
[2022/02/08 17:13:52] [ info] [storage] version=1.1.6, initializing...
[2022/02/08 17:13:52] [ info] [storage] in-memory
[2022/02/08 17:13:52] [ info] [storage] normal synchronization mode, checksum disabled, max_chunks_up=128
[2022/02/08 17:13:52] [ info] [cmetrics] version=0.2.2
[2022/02/08 17:13:52] [ info] [sp] stream processor started
[0] dummy.0: [1644362033.676766000, {"message"=>"dummy"}]
[0] dummy.0: [1644362034.676914000, {"message"=>"dummy"}]

To halt the process, press ctrl-c in the terminal.