Docker images for EMQ X Builder

This repo holds the Dockerfile and build scripts to build docker images which are used to build EMQ X.

The main-4.4 branch is for EMQ X 4.4 series. The main branch is for EMQ X 5.0 series.

OTP repo https://github.com/emqx/otp.git

EMQ X uses a forked Erlang/OTP with the tag scheme <UPSTREAM_TAG>-N where N is the build number which includes bug fixes to Erlang/OTP source code. For example: OTP-24.1.5-1

Add new OTP versions to build

When we need to support a new OTP version for a bugfix release, we should add a new OTP tag to the list in RELEASE.md

for example, after 5.0.0-otp24.1.5-1 is released, in case there is a bug found in OTP which requires OTP 24.2-1, we should add + OTP-24.2-1 to the list.

This list should be append-only in case we want to rebuild an old EMQ X tag, we can still find an up-to-date docker image for it.

Image tag scheme

ghcr.io/emqx/emqx-builder/<BUILDER_GIT_TAG>:24.1.5-1-ubuntu20.04

Where BUILDER_GIT_TAG is of scheme 4.4-1 for images to build EMQ X 4.4 and 5.0-1, 5.0-2 for images to build EMQ X 5.0