samask / zone.sh

#!/bin/bash # ############################################# # SmartOS Zombie Zone Cleanup Script # Usage: ./nuke_zone.sh <UUID> # 20200112 # Use as ./nuke_zone.sh ecc5d57a-3d90-44ca-a89b-8869a120487d # ############################################# UUID=$1 # 1. Validation if [[ -z "$UUID" ]]; then echo "Error: No UUID provided." echo "Usage: $0 <zone-uuid>" exit 1 fi if [[ "$UUID" == "global" ]]; then echo "Error: Cannot delete the global zone." exit 1 fi # Basic check to see if the UUID string format looks roughly correct (simple check) if [[ ! "$UUID" =~ ^[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}$ ]]; then echo "Warning: Format of '$UUID' does not look like a standard UUID." read -p "Are you sure you want to proceed? (y/n) " -n 1 -r echo if [[ ! $REPLY =~ ^[Yy]$ ]]; then exit 1 fi fi echo "--- Starting cleanup for Zone: $UUID ---" # 2. Check current status STATE=$(zoneadm -z "$UUID" list -p 2>/dev/null | cut -d: -f3) if [[ -z "$STATE" ]]; then echo "Zone currently not recognized by zoneadm. Checking ZFS leftovers..." else echo "Current Zone State: $STATE" fi # 3. Analyze and Kill Suspicious Processes echo "Checking for stuck processes..." # We look for zoneadmd specifically, as it is the controller. # We also look for qemu/bhyve instances associated with the UUID. PIDS=$(pgrep -f "$UUID") if [[ -n "$PIDS" ]]; then echo "Found the following processes associated with this UUID:" pgrep -lf "$UUID" echo "Attempting to kill these processes to release locks..." # We use kill -9 (SIGKILL) because if we are here, the process is likely unresponsive to SIGTERM. echo "$PIDS" | xargs kill -9 sleep 2 # Verify they are gone REMAINING=$(pgrep -f "$UUID") if [[ -n "$REMAINING" ]]; then echo "WARNING: Some processes refused to die: $REMAINING" echo "This may indicate a kernel-level hung task (zombie)." else echo "Processes cleared." fi else echo "No locking processes found." fi # 4. Force state to installed/halted if possible # If the zone is technically 'running' in the kernel, we must halt it before uninstalling. if [[ "$STATE" == "running" || "$STATE" == "shutting_down" ]]; then echo "Forcing zone halt..." zoneadm -z "$UUID" halt sleep 2 fi # 5. Force Uninstall echo "Attempting forced uninstall (zoneadm)..." zoneadm -z "$UUID" uninstall -F RET=$? if [[ $RET -eq 0 ]]; then echo "zoneadm uninstall reported success." else echo "zoneadm uninstall reported an error (exit code $RET)." echo "Proceeding to ZFS cleanup anyway." fi # 6. ZFS Dataset Cleanup # vmadm requires the dataset 'zones/<UUID>' to be gone to consider the VM deleted. DATASET="zones/$UUID" if zfs list "$DATASET" > /dev/null 2>&1; then echo "ZFS dataset $DATASET still exists. Destroying it..." # Check if there are dependent snapshots or clones (unlikely for a deletion, but possible) # -r recursively destroys children/snapshots zfs destroy -r "$DATASET" if [[ $? -eq 0 ]]; then echo "Dataset destroyed." else echo "Failed to destroy dataset. Check 'zfs list' manually." fi else echo "ZFS dataset $DATASET is already gone." fi # 7. Final Verification echo "--- Final Status Check ---" if vmadm list | grep -q "$UUID"; then echo "FAILURE: $UUID still appears in 'vmadm list'." vmadm list | grep "$UUID" else echo "SUCCESS: $UUID is no longer in 'vmadm list'." fi if zoneadm list -cv | grep -q "$UUID"; then echo "WARNING: $UUID still appears in 'zoneadm list'." else echo "SUCCESS: $UUID is no longer in 'zoneadm list'." fi # #############################################