Building Milvus is easy if you take advantage of the containerized build environment. This document will guide you through this build process.

1. Docker, using one of the following configurations:

• macOS Install Docker for Mac. See installation instructions here. Note: You will want to set the Docker VM to have at least 2 vCPU and 8GB of initial memory or building will likely fail.
• Linux with local Docker Install Docker according to the instructions for your OS.
• Windows with Docker Desktop WSL2 backend Install Docker according to the instructions. Be sure to store your sources in the local Linux file system, not the Windows remote mount at /mnt/c.

2. Optional Google Cloud SDK

You must install and configure Google Cloud SDK if you want to upload your release to Google Cloud Storage and may safely omit this otherwise.

While it is possible to build Milvus using a local golang installation, we have a build process that runs in a Docker container. This simplifies initial set up and provides a very consistent build and test environment.

Before building Milvus, you must check the eligibility of Docker, Docker Compose, and hardware in line with Milvus' requirements.

lscpu | grep -e sse4_2 -e avx -e avx2 -e avx512

The following scripts are found in the build/ directory. Note that all scripts must be run from the Milvus root directory.

• build/builder.sh: Run a command in a build docker container. Common invocations are:
  • build/builder.sh make: Build just linux binary in the container. Pass options and packages as necessary.
  • build/builder.sh make verifiers: Run all pre-submission verification check.
  • build/builder.sh make unittest: Run all unit tests.
  • build/builder.sh make clean: Clean up all the generated files.

You can specify different OS for builder by setting OS_NAME which defaults to ubuntu20.04. Valid OS are ubuntu20.04, amazonlinux2023.

To specify amazonlinux2023 builder, use these commands:

export OS_NAME=amazonlinux2023
build/builder.sh make

You can also get into the dev containers for development.

Enter root path of Milvus project on your host machine, execute the following commands:

$ ./scripts/devcontainer.sh up

Creating network "milvus-dev" with the default driver
Creating milvus_jaeger_1  ... done
Creating milvus_minio_1   ... done
Creating milvus_pulsar_1  ... done
Creating milvus_etcd_1    ... done
Creating milvus_builder_1 ... done

Check running state of Dev Container:

$ docker-compose -f docker-compose-devcontainer.yml ps

      Name                    Command                  State                                      Ports
---------------------------------------------------------------------------------------------------------------------------------------
milvus_builder_1   /tini -- autouseradd --use ...   Up
milvus_etcd_1      etcd -advertise-client-url ...   Up             2379/tcp, 2380/tcp
milvus_jaeger_1    /go/bin/all-in-one-linux         Up             14250/tcp, 14268/tcp, 16686/tcp, 5775/udp, 5778/tcp, 6831/udp,
                                                                   6832/udp
milvus_minio_1     /usr/bin/docker-entrypoint ...   Up (healthy)   9000/tcp
milvus_pulsar_1    bin/pulsar standalone --no ...   Up

milvus_builder_1 is the docker of milvus dev, other containers are used as unit test dependencies. you can run compilation and unit test inside the container, enter it:

docker exec -ti milvus_builder_1 bash

Compile the project and run unit test, see details at the DEVELOPMENT.md

make milvus

make unittest

Stop Dev Container

./scripts/devcontainer.sh down

Milvus uses Python SDK to write test cases to verify the correctness of Milvus functions. Before running E2E tests, you need a running Milvus:

cd deployments/docker/dev
docker-compose up -d
cd ../../../
build/builder.sh /bin/bash -c "export ROCKSMQ_PATH='/tmp/milvus/rdb_data' && ./scripts/start_standalone.sh && cat"

or

build/builder.sh /bin/bash -c "./scripts/start_cluster.sh && cat"

To run E2E tests, use these commands:

MILVUS_SERVICE_IP=$(docker inspect -f '{{range .NetworkSettings.Networks}}{{.IPAddress}}{{end}}' $(docker-compose ps -q builder))
cd tests/docker
docker-compose run --rm pytest /bin/bash -c "pytest --host ${MILVUS_SERVICE_IP}"

The scripts under build/ are used to build and test. They will ensure that the builder Docker image is built (based on [build/docker/builder] ) and then execute the appropriate command in that container. These scripts will both ensure that the right data is cached from run to run for incremental builds and will copy the results back out of the container. You can specify a different registry/name for builder by setting IMAGE_REPO which defaults to milvusdb.

The builder.sh is executed by first creating a “docker volume“ directory in .docker/. The .docker/ directory is used to cache the third-party package and compiler cache data. It speeds up recompilation by caching previous compilations and detecting when the same compilation is being done again.

• Install Visual Studio Code

• Install Remote Development extension pack

• Integrate with VS Code

The working principle is as follows: mount the local file system to the workspace inside the container, or copy it to the container. The extension of vs code is installed inside the container and runs in it, so that the vs Code of the host can fully access the tools, platforms and file systems inside the container. This means that you just need to connect to different containers to switch the entire development environment seamlessly.

Taking the Milvus project as an example, there is a file named .devcontainer.json in the root directory of the project. This file describes how vs code accesses (or creates) a development container environment, and defines the container environment, working directory, extension tool set, etc.

• The steps to configure the development environment are as follows:

Start VS Code，in the command panel ( F1 ) input “Remote-Containers: Open Folder in Container” , then select the project folder which contains devcontainer.json file.

or click right-bottom corner button > < , choose “Remote-Containers: Open Folder in Container”，then select the project folder which contains devcontainer.json file.

VS Code begin load and construct Devcontainer, the progress bar display the construction state.

After Construction, VS Code automatically connects to the container. Now you can code and debug in VS Code, just like developing in your host machine.

You can also use terminal of VS Code to enter the Dev container to do something. Choose Terminal >> New Terminal in the navigation bar, then you can enter the container:

Modify vscode go setups if necessary, the setting path is code -> preference -> settings

"go.testFlags": ["-v"]  //if you want say detailed output when running unit test
"go.coverOnSave": true  //if you want to show coverage
"go.lintOnSave": true   //if you want to auto golint and check code style

TBD