Defining the list of images to pull

Prerequisites

The curl tool is available. See curl homepage.
The jq tool is available. See jq homepage.
The yq tool is available. See yq homepage.

Procedure

Get the list of relevant container images.

Example 1. Getting the list of all relevant images for Kubernetes

$ curl -sSLo- https://raw.githubusercontent.com/eclipse/che-operator/master/olm/eclipse-che-preview-kubernetes/deploy/olm-catalog/eclipse-che-preview-kubernetes/7.30.1/eclipse-che-preview-kubernetes.v7.30.1.clusterserviceversion.yaml | \
  yq -r '.spec.relatedImages[]'

Example 2. Getting the list of all relevant images for OpenShift

$ curl -sSLo- https://raw.githubusercontent.com/eclipse/che-operator/master/olm/eclipse-che-preview-openshift/deploy/olm-catalog/eclipse-che-preview-openshift/7.30.1/eclipse-che-preview-openshift.v7.30.1.clusterserviceversion.yaml | \
  yq -r '.spec.relatedImages[]'

Exclude from the list the container images not containing the sleep command.
Example 3. Images incompatibles with Image Puller, missing the sleep command
- FROM scratch images.
- che-machine-exec
Exclude from the list the container images mounting volumes in Dockerfile.

Additional resources