From b04d12d67ec970ef71bbf73d8bbd06ad9d094921 Mon Sep 17 00:00:00 2001
From: Jose Diaz-Gonzalez <email@josediazgonzalez.com>
Date: Fri, 23 Oct 2026 20:37:48 -0400
Subject: [PATCH] fix: read alternate image tags from the retired container

On hosts using the containerd image store, an app's previous image can be removed once its tag moves to a new build, even while the old container is still running. The alternate tag lookup then failed, so an image deployed via `git:from-image` was never queued for retirement.
---
 plugins/scheduler-docker-local/scheduler-register-retired | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/plugins/scheduler-docker-local/scheduler-register-retired b/plugins/scheduler-docker-local/scheduler-register-retired
index 3d16d7fbc..81df621d9 100755
--- a/plugins/scheduler-docker-local/scheduler-register-retired
+++ b/plugins/scheduler-docker-local/scheduler-register-retired
@@ -19,7 +19,7 @@ trigger-scheduler-docker-local-scheduler-register-retired() {
   fn-scheduler-docker-local-register-retired "container" "$APP" "$CONTAINER_ID" "$WAIT"
 
   if [[ -n "$IMAGE_ID" ]] && [[ -z "$DOKKU_SKIP_IMAGE_CLEANUP_REGISTRATION" ]]; then
-    ALT_IMAGE_TAGS="$("$DOCKER_BIN" image inspect --format '{{ index .Config.Labels "com.dokku.docker-image-labeler/alternate-tags" }}' "$IMAGE_ID" 2>/dev/null || true)"
+    ALT_IMAGE_TAGS="$("$DOCKER_BIN" container inspect --format '{{ index .Config.Labels "com.dokku.docker-image-labeler/alternate-tags" }}' "$CONTAINER_ID" 2>/dev/null || true)"
 
     if ! fn-scheduler-docker-local-image-in-use-by-app "$APP" "$IMAGE_ID" "$CONTAINER_ID"; then
       fn-scheduler-docker-local-register-retired "image" "$APP" "$IMAGE_ID" "$WAIT"