Save a list of observed images after workflow (#1089)

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit

- **New Features**
- Added a process to list images used in the environment before deletion
during cleanup operations.
- **Chores**
- Enhanced environment cleanup workflow with improved visibility into
used images.
- Introduced a shared writable directory between host and container for
better file management during testing.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

.github/workflows/pull-requests.yaml

@@ -290,8 +290,8 @@ jobs:
           done
           echo "✅ The task completed successfully after $attempt attempts"
 
-  collect_report:
-    name: Collect report
+  collect_debug_information:
+    name: Collect debug information
     runs-on: [self-hosted]
     needs: [test_apps]
     if: ${{ always() }}
@@ -313,10 +313,21 @@ jobs:
           name: cozyreport
           path: /tmp/${{ env.SANDBOX_NAME }}/_out/cozyreport.tgz
 
+      - name: Collect images list
+        run: |
+          cd /tmp/$SANDBOX_NAME
+          make -C packages/core/testing SANDBOX_NAME=$SANDBOX_NAME collect-images
+
+      - name: Upload image list
+        uses: actions/upload-artifact@v4
+        with:
+          name: image-list
+          path: /tmp/${{ env.SANDBOX_NAME }}/_out/images.txt
+
   cleanup:
     name: Tear down environment
     runs-on: [self-hosted]
-    needs: [collect_report]
+    needs: [collect_debug_information]
     if: ${{ always() && needs.test_apps.result == 'success' }}
 
     steps:

hack/collect-images.sh

@@ -0,0 +1,8 @@
+#!/bin/sh
+
+for node in 11 12 13; do
+  talosctl -n 192.168.123.${node} -e 192.168.123.${node} images ls >> images.tmp
+  talosctl -n 192.168.123.${node} -e 192.168.123.${node} images --namespace system ls >> images.tmp
+done
+
+while read _ name sha _ ; do echo $sha $name ; done < images.tmp | sort -u > images.txt

packages/core/testing/Makefile

@@ -55,6 +55,11 @@ collect-report: ## Collect the test report from the sandbox.
 	mkdir -p ../../../_out
 	docker cp "${SANDBOX_NAME}:/workspace/cozyreport.tgz" ../../../_out/cozyreport.tgz
 
+collect-images: ## Collect the list of images used in the sandbox.
+	docker exec "${SANDBOX_NAME}" sh -c 'cd /workspace && hack/collect-images.sh'
+	mkdir -p ../../../_out
+	docker cp "${SANDBOX_NAME}":/workspace/images.txt ../../../_out/images.txt
+
 delete: ## Remove sandbox from existing Kubernetes cluster.
 	docker rm -f "${SANDBOX_NAME}" || true
 
@@ -62,10 +67,13 @@ exec:  ## Opens an interactive shell in the sandbox container.
 	docker exec -ti "${SANDBOX_NAME}" bash
 
 apply: delete
+	mkdir -p /tmp/${SANDBOX_NAME}
+	chmod 777 /tmp/${SANDBOX_NAME}
 	docker run \
 		-d --rm --name "${SANDBOX_NAME}" --privileged \
 		-e TALOSCONFIG=/workspace/talosconfig \
 		-e KUBECONFIG=/workspace/kubeconfig \
+		-e SANDBOX_NAME=${SANDBOX_NAME} \
 		"$$(yq .e2e.image values.yaml)" \
 		--timeout 30m
-	docker cp "${ROOT_DIR}" "${SANDBOX_NAME}":/workspace
+	docker cp "${ROOT_DIR}/." "${SANDBOX_NAME}":/workspace