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devops/orchestration/kubernetes-ops/scripts/namespace-cleanup.sh

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+#!/bin/bash
+# Kubernetes Namespace Cleanup Script
+# Removes completed jobs, failed pods, and unused resources
+# Usage: ./namespace-cleanup.sh <namespace> [--dry-run]
+
+set -euo pipefail
+
+NAMESPACE="${1:-}"
+DRY_RUN="${2:-}"
+
+if [ -z "$NAMESPACE" ]; then
+    echo "Usage: $0 <namespace> [--dry-run]"
+    exit 1
+fi
+
+if [ "$DRY_RUN" == "--dry-run" ]; then
+    echo "DRY RUN MODE - No changes will be made"
+    DELETE_CMD="echo [DRY RUN] Would delete:"
+else
+    DELETE_CMD="kubectl delete"
+fi
+
+echo "========================================="
+echo "Namespace Cleanup: $NAMESPACE"
+echo "========================================="
+echo ""
+
+# Delete completed jobs
+echo "Cleaning up completed Jobs..."
+COMPLETED_JOBS=$(kubectl get jobs -n "$NAMESPACE" -o jsonpath='{.items[?(@.status.succeeded==1)].metadata.name}' 2>/dev/null)
+if [ -n "$COMPLETED_JOBS" ]; then
+    for job in $COMPLETED_JOBS; do
+        $DELETE_CMD job "$job" -n "$NAMESPACE" 2>/dev/null || true
+    done
+else
+    echo "No completed jobs found"
+fi
+
+# Delete failed pods
+echo ""
+echo "Cleaning up failed Pods..."
+FAILED_PODS=$(kubectl get pods -n "$NAMESPACE" --field-selector status.phase=Failed -o name 2>/dev/null)
+if [ -n "$FAILED_PODS" ]; then
+    for pod in $FAILED_PODS; do
+        $DELETE_CMD "$pod" -n "$NAMESPACE" 2>/dev/null || true
+    done
+else
+    echo "No failed pods found"
+fi
+
+# Delete evicted pods
+echo ""
+echo "Cleaning up evicted Pods..."
+EVICTED_PODS=$(kubectl get pods -n "$NAMESPACE" -o json | jq -r '.items[] | select(.status.reason=="Evicted") | .metadata.name' 2>/dev/null)
+if [ -n "$EVICTED_PODS" ]; then
+    for pod in $EVICTED_PODS; do
+        $DELETE_CMD pod "$pod" -n "$NAMESPACE" 2>/dev/null || true
+    done
+else
+    echo "No evicted pods found"
+fi
+
+# Delete orphaned ReplicaSets (0 replicas, no owner)
+echo ""
+echo "Cleaning up orphaned ReplicaSets..."
+kubectl get rs -n "$NAMESPACE" -o json | jq -r '.items[] | select(.spec.replicas==0) | .metadata.name' 2>/dev/null | while read rs; do
+    if [ -n "$rs" ]; then
+        $DELETE_CMD rs "$rs" -n "$NAMESPACE" 2>/dev/null || true
+    fi
+done
+
+echo ""
+echo "========================================="
+echo "Cleanup complete"
+echo "========================================="