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BUILDING.md

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Building O² Control

Overview

O² Control consists of four main components:

  • core - Go, runs locally for testing purposes and connects to a Mesos master
  • executor - Go, runs throughout the cluster
  • coconut - Go, runs locally or wherever you like and connects to core
  • process control plugin + library - C++, runs throughout the cluster linked by user processes

Go environment

$ sudo yum update
$ sudo yum install golang # or alisw-golang+1.11.1-1 and load the module

We also need to get the protoc binary for Protobuf 3.5 or later. It is available as an aliDist recipe, or as alisw-protobuf+v3.5.2-4 (or newer) in the alisw YUM repository. Pick your favorite way to install it, and make sure to load the Protobuf module before continuing.

Installing the protobuf3-compiler package from regular CentOS repositories and then creating a protoc symlink to the protoc3 binary might also work, but is unsupported.

Setting GOPATH and PATH:

$ export GOPATH=$HOME/go # or some other path for local Go binaries, packages and sources
$ export PATH=$GOPATH/bin:$PATH

Check if all is well:

$ go version
$ go env

Clone and build the Go bits

Fetching the sources. You'll get a "no buildable Go source files" error and that's ok, it happens because O² Control has its own Makefile instead of using plain go build.

$ go get -d github.com/AliceO2Group/Control

Running make. This will take a while as all dependencies are gathered, built and installed.

$ cd go/src/github.com/AliceO2Group/Control
$ make all

You should find o2control-core, o2control-executor and coconut in bin.

If you wish to also build the process control library and/or plugin, see the OCC readme.

Otherwise, continue with setting up the development cluster which includes instructions on installing these components from RPM.