add check-images.sh to check installed nginx and agent version from remote registry

Author: sean-breen

scripts/check-images.sh

@@ -0,0 +1,41 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+#set -x
+
+REGISTRY_URL="docker-registry.nginx.com/nginx"
+IMAGE_NAME=${1:-""}
+
+search=${2:-""}
+
+usage() {
+    echo "Usage: $0 <image-name> [search-pattern]"
+    echo "Example: $0 agentv3 alpine"
+    exit 1
+}
+
+if [[ -z "${IMAGE_NAME}" ]]; then
+    usage
+fi
+
+echo "Checking images in ${REGISTRY_URL}/${IMAGE_NAME}"
+
+# Fetch all tags from the remote registry
+skopeo list-tags docker://${REGISTRY_URL}/${IMAGE_NAME} | jq -r '.Tags[]' > all_tags.txt
+echo $(wc -l < all_tags.txt) "tags fetched."
+
+# Filter out tags that end with three or more digits (nightly/build tags)
+grep -Ev '\d{3,}$' all_tags.txt | sort -u > filtered_tags.txt
+echo $(wc -l < filtered_tags.txt) "tags after filtering."
+
+FOUND=($(grep -E "${search}" filtered_tags.txt | sort)) || { echo "No tags found matching '${search}'"; exit 1; }
+echo "tags matching '${search}':" ${#FOUND[@]}
+
+for tag in "${FOUND[@]}"; do
+    echo ":: ${REGISTRY_URL}/${IMAGE_NAME}:$tag"
+    podman pull ${REGISTRY_URL}/${IMAGE_NAME}:$tag > /dev/null 2>&1
+    podman run ${REGISTRY_URL}/${IMAGE_NAME}:$tag nginx -v
+    podman run ${REGISTRY_URL}/${IMAGE_NAME}:$tag nginx-agent --version
+    podman rm -f $(podman ps -a -q) > /dev/null 2>&1 || true
+done
+