Created
July 29, 2025 13:30
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| #!/bin/bash | |
| set -euo pipefail | |
| # Set backup output directory | |
| TIMESTAMP=$(date +%Y%m%d-%H%M%S) | |
| BACKUP_DIR="./k8s-backup-$TIMESTAMP" | |
| GLOBAL_DIR="$BACKUP_DIR/__global" | |
| mkdir -p "$BACKUP_DIR" | |
| mkdir -p "$GLOBAL_DIR" | |
| echo "🔄 Starting Kubernetes backup to $BACKUP_DIR..." | |
| ######################################## | |
| # Backup namespaced resources by namespace | |
| ######################################## | |
| namespaces=$(kubectl get ns -o jsonpath='{.items[*].metadata.name}') | |
| namespaced_resources=$(kubectl api-resources --namespaced=true --verbs=list -o name) | |
| for ns in $namespaces; do | |
| echo "📁 Backing up namespace: $ns" | |
| NS_DIR="$BACKUP_DIR/$ns" | |
| mkdir -p "$NS_DIR" | |
| for resource in $namespaced_resources; do | |
| items=$(kubectl get "$resource" -n "$ns" --no-headers --ignore-not-found -o custom-columns=NAME:.metadata.name || true) | |
| for item in $items; do | |
| echo " 🔹 $resource/$item" | |
| kubectl get "$resource" "$item" -n "$ns" -o yaml > "$NS_DIR/${resource//\//_}--${item}.yaml" | |
| done | |
| done | |
| done | |
| ######################################## | |
| # Backup cluster-wide (non-namespaced) resources | |
| ######################################## | |
| global_resources=$(kubectl api-resources --namespaced=false --verbs=list -o name) | |
| echo "🌐 Backing up cluster-wide resources..." | |
| for resource in $global_resources; do | |
| items=$(kubectl get "$resource" --no-headers --ignore-not-found -o custom-columns=NAME:.metadata.name || true) | |
| for item in $items; do | |
| echo " 🌍 $resource/$item" | |
| kubectl get "$resource" "$item" -o yaml > "$GLOBAL_DIR/${resource//\//_}--${item}.yaml" | |
| done | |
| done | |
| echo "✅ Kubernetes cluster backup completed: $BACKUP_DIR" |
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