Defining the list of images to pull

The Image Puller can pre-pull most images, including scratch images such as che-machine-exec. However, images that mount volumes in the Dockerfile, such as traefik, are not supported for pre-pulling on OpenShift 3.11.

Pre-pulling images involved in workspace startup will reduce workspace start times. For example:

  • Che-Theia

  • broker images

  • plug-in sidecar images

Prerequisites
Procedure

  1. Gather a list of relevant container images for the Kubernetes or OpenShift platform:

    Example 1. Getting the list of all relevant images for Kubernetes
    $ curl -sSLo- https://raw.githubusercontent.com/eclipse-che/che-operator/7.43.x/deploy/olm-catalog/stable/eclipse-che-preview-kubernetes/manifests/che-operator.clusterserviceversion.yaml | \
yq -r '.spec.install.spec.deployments[].spec.template.spec.containers[].env[] | select(.name | test("RELATED_IMAGE_.*"; "g")) | .value' | \
sort -u
    Example 2. Getting the list of all relevant images for OpenShift
    $ curl -sSLo- https://raw.githubusercontent.com/eclipse-che/che-operator/7.43.x/deploy/olm-catalog/stable/eclipse-che-preview-openshift/manifests/che-operator.clusterserviceversion.yaml | \
yq -r '.spec.install.spec.deployments[].spec.template.spec.containers[].env[] | select(.name | test("RELATED_IMAGE_.*"; "g")) | .value' | \
sort -u

  2. Determine images from the list for pre-pulling.

    For faster workspace startup times, consider pre-pulling the workspace-related images:

    • che-theia

    • che-theia-endpoint-runtime-binary

    • che-machine-exec

    • che-plugin-artifacts-broker

    • che-plugin-metadata-broker

Additional resources