Development Guide#


Before setting up the Determined master, set up a Kubernetes cluster with GPU-enabled nodes and Kubernetes version >= 1.19 and <= 1.21. Later versions of Kubernetes may also work. You can set up Kubernetes manually, or you can use a managed Kubernetes service such as GKE or EKS.

Set up a Development Environment#

To deploy a custom version of the Determined master, we deploy a long-running pod in Kubernetes, command it to sleep, then exec into it and build our master. To add a sleep command, modify the template helm/charts/determined/templates/master-deployment.yaml to include the command and args:

  - name: determined-master-{{ .Release.Name }}
    command: ["sleep"]
    args: ["99999m"]

Next apply the Determined Helm chart and exec into the pod containing the master.

helm install <deployment-name> helm/charts/determined

# List pods and find the master pod.
kubectl get pods

kubectl exec -it <master-pod-name> -- /bin/bash

Set up a Determined Environment#

Before installing Determined, install the dependencies specified in the contributing guide.

You can use apt and pip to install most of the dependencies, but you will need to download and manually install Go, Node, the protobuf compiler, and Helm. Here is an example of installing all the necessary dependencies:

apt-get update
DEBIAN_FRONTEND=noninteractive apt-get install -y software-properties-common
DEBIAN_FRONTEND=noninteractive add-apt-repository -y ppa:deadsnakes/ppa
DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends git-all python3.8-dev python3.8-venv default-jre curl build-essential libkrb5-dev unzip jq

# Download and install Go 1.22.
curl -L | tar -xz
chown -R root:root go
mv go /usr/local/

# Download and install Node and TypeScript.
curl -sL | bash -
apt-get install -y nodejs
npm install typescript -g

# Download and install the protobuf compiler.
curl -LO $PB_REL/download/v3.19.0/
unzip -d $HOME/.local

# Download and install Helm.
curl -fsSL -o
chmod 700

In addition to installing these packages, update .bashrc with the new paths.

export GOPATH=$HOME/go
export PATH=$PATH:/usr/local/go/bin:$GOPATH/bin

export PATH="$PATH:$HOME/.local/bin"

After completing these steps, clone the Determined repository and create and activate a virtual environment for Determined. To create a virtual environment, you may use conda or python3-venv. Here is an example for cloning the repository, then creating and activating an environment with python3-venv:

git clone

mkdir ~/.virtualenvs
python3.8 -m venv ~/.virtualenvs/determined

. ~/.virtualenvs/determined/bin/activate

Prepare to run the Determined Master#

Once the dependencies are installed, prepare the repository to run devcluster, a tool for running Determined. First, enter the Determined repository and run:

``make all``

Once that has finished, create a new file at ~/.devcluster.yaml and populate it with the following fields:

startup_input: "p"

cwd: /root/determined

p: make -C harness build  # rebuild Python
w: make -C webui build    # rebuild WebUI
c: make -C docs build     # rebuild docs

- master:
      - sh: make -C proto build
      - sh: make -C master build
      - sh: make -C tools prep-root

         type: "gcs"
         bucket: <name of your bucket>
         save_experiment_best: 0
         save_trial_best: 1
         save_trial_latest: 1

         user: "postgres"
         password: "postgres"
         host: <name of determined db service from `kubectl get services`>
         port: 5432
         name: "determined"
      port: 8081

         type: "kubernetes"
         namespace: default
         max_slots_per_pod: 1
         master_service_name: <name of determined master service from `kubectl get services`>

         level: debug
      root: tools/build

You are now ready to build and run the Determined master! From the Determined repo, run devcluster --no-guess-host to build and run the master.

Next Steps#