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Local development

Purpose

Develop new feature and fix bug on the Gardener Dashboard.

Requirements

  • Yarn. For the required version, refer to .engines.yarn in package.json.
  • Node.js. For the required version, refer to .engines.node in package.json.

Steps

1. Clone repository

Clone the gardener/dashboard repository

git clone git@github.com:gardener/dashboard.git

2. Install dependencies

Run yarn at the repository root to install all dependencies.

cd dashboard
yarn

3. Configuration

Place the Gardener Dashboard configuration under ${HOME}/.gardener/config.yaml or alternatively set the path to the configuration file using the GARDENER_CONFIG environment variable.

A local configuration example could look like follows:

port: 3030
logLevel: debug
logFormat: text
apiServerUrl: https://my-local-cluster # garden cluster kube-apiserver url - kubectl config view --minify -ojsonpath='{.clusters[].cluster.server}'
sessionSecret: c2VjcmV0                # symmetric key used for encryption
frontend:
  dashboardUrl:
    pathname: /api/v1/namespaces/kube-system/services/kubernetes-dashboard/proxy/
  defaultHibernationSchedule:
    evaluation:
    - start: 00 17 * * 1,2,3,4,5
    development:
    - start: 00 17 * * 1,2,3,4,5
      end: 00 08 * * 1,2,3,4,5
    production: ~

4. Run it locally

The Gardener Dashboard backend server requires a kubeconfig for the Garden cluster. You can set it e.g. by using the KUBECONFIG environment variable.

If you want to run the Garden cluster locally, follow the getting started locally documentation. Gardener Dashboard supports the local infrastructure provider that comes with the local Gardener cluster setup. See 6. Login to the dashboard for more information on how to use the Dashboard with a local gardener or any other Gardener landscape.

Start the backend server (http://localhost:3030).

cd backend
export KUBECONFIG=/path/to/garden/cluster/kubeconfig.yaml
yarn serve

To start the frontend server, you have two options for handling the server certificate:

  1. Recommended Method: Run yarn setup in the frontend directory to generate a new self-signed CA and TLS server certificate before starting the frontend server for the first time. The CA is automatically added to the keychain on macOS. If you prefer not to add it to the keychain, you can use the --skip-keychain flag. For other operating systems, you will need to manually add the generated certificates to the local trust store.

  2. Alternative Method: If you prefer not to run yarn setup, a temporary self-signed certificate will be generated automatically. This certificate will not be added to the keychain. Note that you will need to click through the insecure warning in your browser to access the dashboard.

We need to start a TLS dev server because we use cookie names with __Host- prefix. This requires the secure attribute to be set. For more information, see OWASP Host Prefix.

Start the frontend dev server (https://localhost:8443) with https and hot reload enabled.

cd frontend
# yarn setup
yarn serve

You can now access the UI on https://localhost:8443/

5. Login to the dashboard

To login to the dashboard you can either configure oidc, or alternatively login using a token:

To login using a token, first create a service account.

kubectl -n garden create serviceaccount dashboard-user

Assign it a role, e.g. cluster-admin.

kubectl set subject clusterrolebinding cluster-admin --serviceaccount=garden:dashboard-user

Get the token of the service account.

kubectl -n garden create token dashboard-user --duration 24h

Copy the token and login to the dashboard.

Build

Build docker image locally.

make build

Push

Push docker image to Google Container Registry.

make push

This command expects a valid gcloud configuration named gardener.

gcloud config configurations describe gardener
is_active: true
name: gardener
properties:
  core:
    account: john.doe@example.org
    project: johndoe-1008