This directory contains the Dockerfiles used to build the CI system.

These are not the Dockerfiles that build the rayproject/ray releases. These are found in the /docker directory under the root.

The Dockerfiles are hierarchical and will be built in different places during a CI run.

The base images are built per-branch either when they are first requested or on a periodic basis (for the master branch). The base images contain the latest dependencies of the respective branch. Every per-commit build will always install the latest dependencies to make sure everything is up to date. However, by using the base images as a source, this will mostly be a no or low cost operation.

• base.test.Dockerfile contains common dependencies for all images
• base.build.Dockerfile inherits from base.test and installs build dependencies like Java and LLVM
• base.ml.Dockerfile inherits from base.test and installs ML dependencies like torch/tensorflow
• base.gpu.Dockerfile inherits from a CUDA base image and otherwise contains the same content as base.test and base.ml.

On every commit, the following images are built in this order:

• build.Dockerfile (based on base.build) which will build the Ray binaries
• test.Dockerfile (based on base.test), where we will inject the built Ray libraries
• ml.Dockerfile (based on base.ml), where we will inject the built Ray libraries
• gpu.Dockerfile (based on base.ml), where we will inject the built Ray libraries