Cloud Intermediate

Kubernetes Backup a Disaster Recovery¶

KubernetesBackupDisaster RecoveryVelero 5 min read

Strategie zálohování a obnovy Kubernetes clusterů. Velero, etcd backup, PV snapshots a DR plány.

Co Zálohovat¶

• etcd — cluster state (nejkritičtější)
• Kubernetes manifesty — Deployments, Services, ConfigMaps, Secrets
• Persistent Volumes — data aplikací
• Custom Resources — CRDs a jejich instance

Velero¶

# Instalace
velero install \
  --provider aws \
  --bucket velero-backups \
  --secret-file ./credentials \
  --plugins velero/velero-plugin-for-aws:v1.9.0

# Záloha
velero backup create full-backup --include-namespaces '*'

# Scheduled backup
velero schedule create daily-backup \
  --schedule="0 2 * * *" \
  --ttl 720h

etcd Backup¶

ETCDCTL_API=3 etcdctl snapshot save /backup/etcd-snapshot.db \
  --endpoints=https://127.0.0.1:2379 \
  --cacert=/etc/kubernetes/pki/etcd/ca.crt \
  --cert=/etc/kubernetes/pki/etcd/server.crt \
  --key=/etc/kubernetes/pki/etcd/server.key

# Restore
ETCDCTL_API=3 etcdctl snapshot restore /backup/etcd-snapshot.db \
  --data-dir=/var/lib/etcd-new

Summary¶

Backup a DR strategie jsou kritické pro produkční Kubernetes. Velero pro manifesty a PV, etcd snapshoty pro cluster state. Pravidelně testujte restore!

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