Added docker swarm cleanup_unused_images script

Author: samerfarida

docker_swarm_setup/cleanup_unused_images.sh

@@ -0,0 +1,47 @@
+#!/usr/bin/env bash
+
+# List of all your Swarm nodes
+NODES=(
+  "docker-prod-manager1"
+  "docker-prod-manager2"
+  "docker-prod-manager3"
+  "docker-prod-worker1"
+  "docker-prod-worker2"
+  "docker-prod-worker3"
+)
+
+echo "=== Docker Swarm Cluster Cleanup ==="
+echo "This script will connect to each node and prune unused images."
+echo "-------------------------------------"
+
+# First, show disk usage before cleanup
+for NODE in "${NODES[@]}"; do
+  echo "---- $NODE: Disk usage before ----"
+  ssh serveradmin@$NODE "sudo docker system df"
+done
+
+# Then show which images will be removed (manual preview since there's no --dry-run)
+for NODE in "${NODES[@]}"; do
+  echo "---- $NODE: Dangling images preview ----"
+  ssh serveradmin@$NODE "sudo docker images -f 'dangling=true'"
+done
+
+read -rp "Proceed to prune unused images on all nodes? (y/N): " CONFIRM
+if [[ "$CONFIRM" != "y" && "$CONFIRM" != "Y" ]]; then
+  echo "Aborted."
+  exit 1
+fi
+
+# Run actual prune
+for NODE in "${NODES[@]}"; do
+  echo "---- $NODE: Pruning unused images ----"
+  ssh serveradmin@$NODE "sudo docker image prune -a -f"
+done
+
+# Show disk usage after cleanup
+for NODE in "${NODES[@]}"; do
+  echo "---- $NODE: Disk usage after ----"
+  ssh serveradmin@$NODE "sudo docker system df"
+done
+
+echo "✅ Done! All unused images have been cleaned up across the cluster."