How to delete images from the old installer after upgrade

If you experience issues with image vulnerabilities or storage consumption after performing an upgrade, you can delete the images from the old installer.

To perform this optional post-upgrade operation, take the following steps:

1. Update IMG, TAG, USER, PASS, registry, and latest_image_json according to the cluster configuration in the following script, then run it:

   #!/bin/bash
   
   ### Please change below variables as required
   IMG=<E.g. dataservice/dataservice-designer>
   TAG=<E.g. v20231116-tag>
   USER=<E.g. "admin">
   PASS=<E.g. "password">
   registry=<E.g. "registry.mycluster.com">
   latest_image_json=<E.g. "/opt/UiPathAutomationSuite/UiPath_Installer/versions/docker-images.json">
   ####
   
   [[ -f "${latest_image_json}" ]] || {
   	echo "File "$latest_image_json" doesn't exist"
   	exit 1
   }
   
   cat "${latest_image_json}" | tr -d '",' | grep -w "${IMG}:${TAG}" >> /dev/null && {
   	echo "Image ${IMG}:${TAG} is being used in cluster. Will skip the deletion."
   	exit 0
   }
   
   echo "Deleting image ${IMG}:${TAG}"
   
   cred="-u ${USER}:${PASS}"
   
   for i in `curl -k -H 'Accept: application/vnd.docker.distribution.manifest.v2+json' $cred "https://$registry/v2/$IMG/manifests/$TAG" | jq -r '.layers | .[] | .digest'`; do
   	curl -k  -H "Accept: application/vnd.docker.distribution.manifest.v2+json"  $cred -X DELETE "https://$registry/v2/$IMG/manifests/$i"
   done
   
   for i in `curl -k -H 'Accept: application/vnd.docker.distribution.manifest.v2+json' $cred "https://$registry/v2/$IMG/manifests/$TAG" | jq -r '.config.digest'`; do
   	curl -k  -H "Accept: application/vnd.docker.distribution.manifest.v2+json"  $cred -X DELETE "https://$registry/v2/$IMG/manifests/$i"
   done

2. Restart the registry pod for the Garbage Collection execution or execute into the registry pod and run Garbage Collection using the following command:

   registry garbage-collect /etc/docker/registry/config.yml