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Chapter 1. Customizing the devfile and plug-in registries
CodeReady Workspaces 2.1 introduces two registries: the plug-ins registry and the devfile registry. They are static websites where the metadata of CodeReady Workspaces plug-ins and CodeReady Workspaces devfiles is published.
The plug-in registry makes it possible to share a plug-in definition across all the users of the same instance of CodeReady Workspaces. Only plug-ins that are published in a registry can be used in a devfile.
The devfile registry holds the definitions of the CodeReady Workspaces stacks. These are available on the CodeReady Workspaces user dashboard when selecting Create Workspace. It contains the list of CodeReady Workspaces technological stack samples with example projects.
The devfile and plug-in registries run in two separate pods and are deployed when the CodeReady Workspaces server is deployed (that is the default behavior of the CodeReady Workspaces Operator). The metadata of the plug-ins and devfiles are versioned on GitHub and follow the CodeReady Workspaces server life cycle.
In this document, the following two ways to customize the default registries that are deployed with CodeReady Workspaces (to modify the plug-ins or devfile metadata) are described:
- Building a custom image of the registries
Running the default images but modifying them at runtime
1.1. Building and running a custom registry image Copier lienLien copié sur presse-papiers!
This section describes the building of registries and updating a running CodeReady Workspaces server to point to the registries.
1.1.1. Building a custom devfile registry Copier lienLien copié sur presse-papiers!
This section describes how to build a custom devfiles registry. Following operations are covered:
- Getting a copy of the source code necessary to build a devfiles registry.
- Adding a new devfile.
- Building the devfiles registry.
Procedure
Clone the devfile registry repository:
git clone git@github.com:redhat-developer/codeready-workspaces.git cd codeready-workspaces/dependencies/che-devfile-registry
$ git clone git@github.com:redhat-developer/codeready-workspaces.git $ cd codeready-workspaces/dependencies/che-devfile-registryCopy to Clipboard Copied! Toggle word wrap Toggle overflow In the
./che-devfile-registry/devfiles/directory, create a subdirectory<devfile-name>/and add thedevfile.yamlandmeta.yamlfiles.File organization for a devfile
./che-devfile-registry/devfiles/ └── <devfile-name> ├── devfile.yaml └── meta.yaml./che-devfile-registry/devfiles/ └── <devfile-name> ├── devfile.yaml └── meta.yamlCopy to Clipboard Copied! Toggle word wrap Toggle overflow -
Add valid content in the
devfile.yamlfile. For a detailed description of the devfile format, see the Making a workspace portable using a devfile section. Ensure that the
meta.yamlfile conforms to the following structure:Expand Table 1.1. Parameters for a devfile meta.yaml Attribute Description descriptionDescription as it appears on the user dashboard.
displayNameName as it appears on the user dashboard.
globalMemoryLimitThe sum of the expected memory consumed by all the components launched by the devfile. This number will be visible on the user dashboard. It is informative and is not taken into account by the CodeReady Workspaces server.
iconLink to an
.svgfile that is displayed on the user dashboard.tagsList of tags. Tags usually include the tools included in the stack.
Example devfile
meta.yamldisplayName: Rust description: Rust Stack with Rust 1.39 tags: ["Rust"] icon: https://www.eclipse.org/che/images/logo-eclipseche.svg globalMemoryLimit: 1686Mi
displayName: Rust description: Rust Stack with Rust 1.39 tags: ["Rust"] icon: https://www.eclipse.org/che/images/logo-eclipseche.svg globalMemoryLimit: 1686MiCopy to Clipboard Copied! Toggle word wrap Toggle overflow Build the containers for the custom devfile registry:
docker build -t my-devfile-registry .
$ docker build -t my-devfile-registry .Copy to Clipboard Copied! Toggle word wrap Toggle overflow
1.1.2. Building a custom plug-in registry Copier lienLien copié sur presse-papiers!
This section describes how to build a custom plug-in registry. Following operations are covered:
- Getting a copy of the source code necessary to build a custom plug-in registry.
- Adding a new plug-in.
- Building the custom plug-in registry.
Procedure
Clone the plug-in registry repository:
git clone git@github.com:redhat-developer/codeready-workspaces.git cd codeready-workspaces/dependencies/che-plugin-registry
$ git clone git@github.com:redhat-developer/codeready-workspaces.git $ cd codeready-workspaces/dependencies/che-plugin-registryCopy to Clipboard Copied! Toggle word wrap Toggle overflow In the
./che-plugin-registry/v3/plugins/directory, create new directories<publisher>/<plugin-name>/<plugin-version>/and ameta.yamlfile in the last directory.File organization for a plugin
Copy to Clipboard Copied! Toggle word wrap Toggle overflow -
Add valid content to the
meta.yamlfile. See the “Using a Visual Studio Code extension in CodeReady Workspaces” section or the README.md file in theeclipse/che-plugin-registryrepository for a detailed description of themeta.yamlfile format. Create a file named
latest.txtwith content the name of the latest<plugin-version>directory.ExampleCopy to Clipboard Copied! Toggle word wrap Toggle overflow Build the containers for the custom plug-in registry:
docker build -t my-devfile-registry .
$ docker build -t my-devfile-registry .Copy to Clipboard Copied! Toggle word wrap Toggle overflow
1.1.3. Deploying the registries Copier lienLien copié sur presse-papiers!
Prerequisites
The my-plug-in-registry and my-devfile-registry images used in this section are built using the docker command. This section assumes that these images are available on the OpenShift cluster where CodeReady Workspaces is deployed.
This is true on Minikube, for example, if before running the docker build commands, the user executed the eval $\{minikube docker-env} command (or, the eval $\{minishift docker-env} command for Minishift).
Otherwise, these images can be pushed to a container registry (public, such as quay.io, or the DockerHub, or a private registry).
1.1.3.1. Deploying registries in OpenShift Copier lienLien copié sur presse-papiers!
Procedure
An OpenShift template to deploy the plug-in registry is available in the openshift/ directory of the GitHub repository.
To deploy the plug-in registry using the OpenShift template, run the following command:
Copy to Clipboard Copied! Toggle word wrap Toggle overflow - 1
- If installed using crwctl, the default CodeReady Workspaces namespace is
workspaces. The OperatorHub installation method deploys CodeReady Workspaces to the users current namespace.
The devfile registry has an OpenShift template in the
deploy/openshift/directory of the GitHub repository. To deploy it, run the command:Copy to Clipboard Copied! Toggle word wrap Toggle overflow - 1
- If installed using crwctl, the default CodeReady Workspaces namespace is
workspaces. The OperatorHub installation method deploys CodeReady Workspaces to the users current namespace.
Check if the registries are deployed successfully on OpenShift.
To verify that the new plug-in is correctly published to the plug-in registry, make a request to the registry path
/v3/plugins/index.json(or/devfiles/index.jsonfor the devfile registry).Copy to Clipboard Copied! Toggle word wrap Toggle overflow Verify that the CodeReady Workspaces server points to the URL of the registry. To do this, compare the value of the
CHE_WORKSPACE_PLUGIN__REGISTRY__URLparameter in thecodereadyConfigMap (orCHE_WORKSPACE_DEVFILE__REGISTRY__URLfor the devfile registry):oc get \ -o "custom-columns=URL:.data['CHE_WORKSPACE_PLUGINREGISTRYURL']" \ --no-headers cm/che
$ oc get \ -o "custom-columns=URL:.data['CHE_WORKSPACE_PLUGINREGISTRYURL']" \ --no-headers cm/che URL http://che-plugin-registry-che.192.168.99.100.mycluster.mycompany.com/v3Copy to Clipboard Copied! Toggle word wrap Toggle overflow with the URL of the route:
oc get -o 'custom-columns=URL:.spec.rules[0].host' \ -l app=che-plugin-registry route --no-headers
$ oc get -o 'custom-columns=URL:.spec.rules[0].host' \ -l app=che-plugin-registry route --no-headers che-plugin-registry-che.192.168.99.100.mycluster.mycompany.comCopy to Clipboard Copied! Toggle word wrap Toggle overflow If they do not match, update the ConfigMap and restart the CodeReady Workspaces server.
oc edit cm/che oc scale --replicas=0 deployment/che oc scale --replicas=1 deployment/che
$ oc edit cm/che (...) $ oc scale --replicas=0 deployment/che $ oc scale --replicas=1 deployment/cheCopy to Clipboard Copied! Toggle word wrap Toggle overflow
When the new registries are deployed and the CodeReady Workspaces server is configured to use them, the new plug-ins are available in the Plugin view of a workspace and the new stacks are displayed in the New Workspace tab of the user dashboard.
1.2. Including the plug-in binaries in the registry image Copier lienLien copié sur presse-papiers!
The plug-in registry only hosts CodeReady Workspaces plug-in metadata. The binaries are usually referred through a link in the meta.yaml file. Sometimes, such as offline environments, it may be necessary to make the binaries available inside the registry image.
This section describes how to modify a plug-in meta.yaml file to point to a local file inside the container and rebuild a new registry that contains the modified plug-in meta.yaml file and the binary file. In the following example, the Java plug-in that refers to two remote VS Code extensions binaries is considered.
Prerequisites
- CodeReady Workspaces is installed.
-
The OpenShift command-line tool,
oc, is installed.
Procedure
Download the binaries locally:
Copy to Clipboard Copied! Toggle word wrap Toggle overflow Get the plug-in registry URL:
For an Operator installation:
oc get checluster ${CHECLUSTER_NAME} \ -o jsonpath='{.status.pluginRegistryURL}' -n ${CODEREADY_NAMESPACE}$ oc get checluster ${CHECLUSTER_NAME} \ -o jsonpath='{.status.pluginRegistryURL}' -n ${CODEREADY_NAMESPACE}Copy to Clipboard Copied! Toggle word wrap Toggle overflow Note that the obtained URL is without the
httporhttpsprefix.
Update the URLs in the
meta.yamlfile, so that they point to the VS Code extension binaries that are saved in the registry container:Copy to Clipboard Copied! Toggle word wrap Toggle overflow - Build and deploy the plug-in registry using the instructions in the Building and running a custom registry image section.
1.3. Editing a devfile and plug-in at runtime Copier lienLien copié sur presse-papiers!
An alternative to building a custom registry image is to:
- Start a registry
- Modify its content at runtime
This approach is simpler and faster. But the modifications are lost as soon as the container is deleted.
1.3.1. Adding a plug-in at runtime Copier lienLien copié sur presse-papiers!
Procedure
To add a plug-in:
Check out the plugin registry sources.
git clone https://github.com/eclipse/che-plugin-registry; \ cd che-plugin-registry
$ git clone https://github.com/eclipse/che-plugin-registry; \ cd che-plugin-registryCopy to Clipboard Copied! Toggle word wrap Toggle overflow Create a
meta.yamlin some local folder. This can be done from scratch or by copying from an existing plug-in’smeta.yamlfile.PLUGIN="v3/plugins/new-org/new-plugin/0.0.1"; \ mkdir -p ${PLUGIN}; cp v3/plugins/che-incubator/cpptools/0.1/* ${PLUGIN}/$ PLUGIN="v3/plugins/new-org/new-plugin/0.0.1"; \ mkdir -p ${PLUGIN}; cp v3/plugins/che-incubator/cpptools/0.1/* ${PLUGIN}/ echo "${PLUGIN##*/}" > ${PLUGIN}/../latest.txtCopy to Clipboard Copied! Toggle word wrap Toggle overflow -
If copying from an existing plug-in, make changes to the
meta.yamlfile to suit your needs. Make sure your new plug-in has a uniquetitle,displayNameanddescription. Update thefirstPublicationDateto today’s date. These fields in
meta.yamlmust match the path defined inPLUGINabove.publisher: new-org name: new-plugin version: 0.0.1
publisher: new-org name: new-plugin version: 0.0.1Copy to Clipboard Copied! Toggle word wrap Toggle overflow Get the name of the Pod that hosts the plug-in registry container. To do this, filter the
component=plugin-registrylabel:PLUGIN_REG_POD=$(oc get -o custom-columns=NAME:.metadata.name \ --no-headers pod -l component=plugin-registry)
$ PLUGIN_REG_POD=$(oc get -o custom-columns=NAME:.metadata.name \ --no-headers pod -l component=plugin-registry)Copy to Clipboard Copied! Toggle word wrap Toggle overflow Regenerate the registry’s
index.jsonfile to include your new plug-in.Copy to Clipboard Copied! Toggle word wrap Toggle overflow Copy the new
index.jsonandmeta.yamlfiles from your new local plug-in folder to the container.cd che-plugin-registry; \ LOCAL_FILES="$(pwd)/${PLUGIN}/meta.yaml $(pwd)/v3/plugins/index.json"; \ oc exec ${PLUGIN_REG_POD} -i -t -- mkdir -p /var/www/html/${PLUGIN}; \ for f in $LOCAL_FILES; do e=${f/$(pwd)\//}; echo "Upload ${f} -> /var/www/html/${e}"; \ oc cp "${f}" ${PLUGIN_REG_POD}:/var/www/html/${e}; done$ cd che-plugin-registry; \ LOCAL_FILES="$(pwd)/${PLUGIN}/meta.yaml $(pwd)/v3/plugins/index.json"; \ oc exec ${PLUGIN_REG_POD} -i -t -- mkdir -p /var/www/html/${PLUGIN}; \ for f in $LOCAL_FILES; do e=${f/$(pwd)\//}; echo "Upload ${f} -> /var/www/html/${e}"; \ oc cp "${f}" ${PLUGIN_REG_POD}:/var/www/html/${e}; doneCopy to Clipboard Copied! Toggle word wrap Toggle overflow -
The new plug-in can now be used from the existing CodeReady Workspaces instance’s plug-in registry. To discover it, go to the CodeReady Workspaces dashboard, then click the
Workspaceslink. From there, click the gear icon to configure one of your workspaces. Select thePluginstab to see the updated list of available plug-ins.
1.3.2. Adding a devfile at runtime Copier lienLien copié sur presse-papiers!
Procedure
To add a devfile:
Check out the devfile registry sources.
git clone https://github.com/eclipse/che-devfile-registry; \ cd che-devfile-registry
$ git clone https://github.com/eclipse/che-devfile-registry; \ cd che-devfile-registryCopy to Clipboard Copied! Toggle word wrap Toggle overflow Create a
devfile.yamlandmeta.yamlin some local folder. This can be done from scratch or by copying from an existing devfile.STACK="new-stack"; \ mkdir -p devfiles/${STACK}; cp devfiles/nodejs/* devfiles/${STACK}/$ STACK="new-stack"; \ mkdir -p devfiles/${STACK}; cp devfiles/nodejs/* devfiles/${STACK}/Copy to Clipboard Copied! Toggle word wrap Toggle overflow -
If copying from an existing devfile, make changes to the devfile to suit your needs. Make sure your new devfile has a unique
displayNameanddescription. Get the name of the Pod that hosts the devfile registry container. To do this, filter the
component=devfile-registrylabel:DEVFILE_REG_POD=$(oc get -o custom-columns=NAME:.metadata.name \ --no-headers pod -l component=devfile-registry)
$ DEVFILE_REG_POD=$(oc get -o custom-columns=NAME:.metadata.name \ --no-headers pod -l component=devfile-registry)Copy to Clipboard Copied! Toggle word wrap Toggle overflow Regenerate the registry’s
index.jsonfile to include your new devfile.cd che-devfile-registry; \ "$(pwd)/build/scripts/check_mandatory_fields.sh" devfiles; \ "$(pwd)/build/scripts/index.sh" > index.json
$ cd che-devfile-registry; \ "$(pwd)/build/scripts/check_mandatory_fields.sh" devfiles; \ "$(pwd)/build/scripts/index.sh" > index.jsonCopy to Clipboard Copied! Toggle word wrap Toggle overflow Copy the new
index.json,devfile.yamlandmeta.yamlfiles from your new local devfile folder to the container.cd che-devfile-registry; \ LOCAL_FILES="$(pwd)/${STACK}/meta.yaml $(pwd)/${STACK}/devfile.yaml $(pwd)/index.json"; \ oc exec ${DEVFILE_REG_POD} -i -t -- mkdir -p /var/www/html/devfiles/${STACK}; \ for f in $LOCAL_FILES; do e=${f/$(pwd)\//}; echo "Upload ${f} -> /var/www/html/devfiles/${e}"$ cd che-devfile-registry; \ LOCAL_FILES="$(pwd)/${STACK}/meta.yaml $(pwd)/${STACK}/devfile.yaml $(pwd)/index.json"; \ oc exec ${DEVFILE_REG_POD} -i -t -- mkdir -p /var/www/html/devfiles/${STACK}; \ for f in $LOCAL_FILES; do e=${f/$(pwd)\//}; echo "Upload ${f} -> /var/www/html/devfiles/${e}" oc cp "${f}" ${DEVFILE_REG_POD}:/var/www/html/devfiles/${e}; doneCopy to Clipboard Copied! Toggle word wrap Toggle overflow -
The new devfile can now be used from the existing CodeReady Workspaces instance’s devfile registry. To discover it, go to the CodeReady Workspaces dashboard, then click the
Workspaceslink. From there, clickAdd Workspaceto see the updated list of available devfiles.