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Detect containers running behind already-pulled images

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OLD_ID vs NEW_ID only caught updates landed during this run. If an image
was pulled externally (Unraid UI), the container stayed on the old image
while :latest moved on — this run saw nothing to do. Now also compare
the container's current image ID against :latest and rebuild if behind.
This commit is contained in:
Gmer4Lfe
2026-06-07 09:57:00 -04:00
parent 819f5e6450
commit 30e7c2f6b0
2 changed files with 21 additions and 9 deletions
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Docker_Essentials/docker_update.sh
+12 -5
View File
@@ -285,7 +285,10 @@ for container in "${TARGET_CONTAINERS[@]}"; do
continue
fi
# Capture image ID before pull to detect whether an update landed
# Capture the image ID the container is currently running on, and the
# image ID :latest points to before the pull. After pulling, we rebuild if
# either a new digest landed OR the container is behind what :latest is now.
CONTAINER_IMAGE_ID=$(docker inspect "$container" --format='{{.Image}}' 2>/dev/null || echo "")
OLD_ID=$(docker image inspect "$IMAGE" --format='{{.Id}}' 2>/dev/null || echo "")
log "$ICON_SYNC Pulling $IMAGE..."
@@ -299,12 +302,16 @@ for container in "${TARGET_CONTAINERS[@]}"; do
NEW_ID=$(docker image inspect "$IMAGE" --format='{{.Id}}' 2>/dev/null || echo "")
if [[ $_pull_rc -eq 0 ]]; then
if [[ -n "$OLD_ID" ]] && [[ "$OLD_ID" != "$NEW_ID" ]]; then
log "$ICON_DONE $container — updated ✅ (${OLD_ID:7:12} → ${NEW_ID:7:12})"
_pull_new=$( [[ -n "$OLD_ID" && "$OLD_ID" != "$NEW_ID" ]] && echo true || echo false)
_container_behind=$([[ -n "$CONTAINER_IMAGE_ID" && -n "$NEW_ID" && "$CONTAINER_IMAGE_ID" != "$NEW_ID" ]] && echo true || echo false)
if [[ "$_pull_new" == true || "$_container_behind" == true ]]; then
[[ "$_pull_new" == true ]] && log "$ICON_DONE $container — new image (${OLD_ID:7:12} → ${NEW_ID:7:12})"
[[ "$_container_behind" == true && "$_pull_new" == false ]] && log "$ICON_DONE $container — image already pulled, container behind (${CONTAINER_IMAGE_ID:7:12} → ${NEW_ID:7:12})"
UPDATED+=("$container")
OLD_IMAGE_IDS+=("$OLD_ID")
OLD_IMAGE_IDS+=("$CONTAINER_IMAGE_ID")
else
log "$container — already up to date (${NEW_ID:7:12})"
log "$container — up to date (${NEW_ID:7:12})"
UP_TO_DATE+=("$container")
fi
else