devworkspace-operator

README

Dev Workspace Operator

Dev Workspace operator repository that contains the controller for the DevWorkspace Custom Resource. The Kubernetes API of the DevWorkspace is defined in the https://github.com/devfile/api repository.

DevWorkspace CR

Annotations

You can add these Kubernetes annotations to specific DevWorkspace CR to customize their behavior.

Name	Value
controller.devfile.io/restricted-access	true or false

Restricted Access

The controller.devfile.io/restricted-access specifies that a DevWorkspace needs additional access control (in addition to RBAC). When a DevWorkspace is created with the controller.devfile.io/restricted-access annotation set to true, the webhook server will guarantee

• Only the DevWorkspace Operator ServiceAccount or DevWorkspace creator can modify important fields in the devworksapce
• Only the DevWorkspace creator can create pods/exec into devworkspace-related containers.

This annotation should be used when a DevWorkspace is expected to contain sensitive information that should be protect above the protection provided by standard RBAC rules (e.g. if the DevWorkspace will store the user's OpenShift token in-memory).

Example:

metadata:
  annotations:
    controller.devfile.io/restricted-access: true

Prerequisites

• go
• git
• sed
• jq
• yq (python-yq from https://github.com/kislyuk/yq#installation, other distributions may not work)
• docker

Note: kustomize v4.0.5 is required for most tasks. It is downloaded automatically to the .kustomize folder in this repo when required. This downloaded version is used regardless of whether or not kustomize is already installed on the system.

Running the controller in a cluster

When deployed to Kubernetes, the controller requires cert-manager running in the cluster. You can install it using make install_cert_manager if you don't run it already. The minimum version of cert-manager is v1.0.4.

The controller can be deployed to a cluster provided you are logged in with cluster-admin credentials:

export DWO_IMG=quay.io/devfile/devworkspace-controller:next
make install

By default, the controller will expose workspace servers without any authentication; this is not advisable for public clusters, as any user could access the created workspace via URL.

See below for all environment variables used in the makefile.

Note: The operator requires internet access from containers to work. By default, crc setup may not provision this, so it's necessary to configure DNS for Docker:

# /etc/docker/daemon.json
{
  "dns": ["192.168.0.1"]
}

Development

The repository contains a Makefile; building and deploying can be configured via the environment variables

variable	purpose	default value
DWO_IMG	Image used for controller	quay.io/devfile/devworkspace-controller:next
NAMESPACE	Namespace to use for deploying controller	devworkspace-controller
ROUTING_SUFFIX	Cluster routing suffix (e.g. $(minikube ip).nip.io, apps-crc.testing). Required for Kubernetes	192.168.99.100.nip.io
PULL_POLICY	Image pull policy for controller	Always
DEVWORKSPACE_API_VERSION	Branch or tag of the github.com/devfile/api to depend on	v1alpha1

Some of the rules supported by the makefile:

rule	purpose
docker	build and push docker image
install	install controller to cluster
restart	restart cluster controller deployment
install_crds	update CRDs on cluster
install_cert_manager	installs the cert-manager to the cluster (only required for Kubernetes)
uninstall	delete controller namespace devworkspace-controller and remove CRDs from cluster
help	print all rules and variables

To see all rules supported by the makefile, run make help

Test run controller

1. Take a look samples devworkspace configuration in ./samples folder.
2. Apply any of them by executing kubectl apply -f ./samples/flattened_theia-next.yaml -n <namespace>
3. As soon as devworkspace is started you're able to get IDE url by executing kubectl get devworkspace -n <namespace>

Run controller locally

make install
oc patch deployment/devworkspace-controller-manager --patch "{\"spec\":{\"replicas\":0}}"
make run

When running locally, only a single namespace is watched; as a result, all devworkspaces have to be deployed to ${NAMESPACE}

Run controller locally and debug

Debugging the controller depends on delve being installed (go get -u github.com/go-delve/delve/cmd/dlv). Note that at the time of writing, executing go get in this repo's directory will update go.mod; these changes should be dropped before committing.

make install
oc patch deployment/devworkspace-controller-manager --patch "{\"spec\":{\"replicas\":0}}"
make debug

Controller configuration

Controller behavior can be configured with data from the devworkspace-controller config map in the same namespace where controller lives.

For all available configuration properties and their default values, see pkg/config

Remove controller from your K8s/OS Cluster

To uninstall the controller and associated CRDs, use the Makefile uninstall rule:

make uninstall

This will delete all custom resource definitions created for the controller, as well as the devworkspace-controller namespace.

CI

GitHub actions

• Next Dockerimage action builds main branch and pushes it to quay.io/devfile/devworkspace-controller:next