How to: 3. Advanced Cluster Management and Maintenance
#### Automated Scaling

- **Overview**: Types of scaling – Cluster Autoscaler, Horizontal Pod Autoscaler (HPA), and Vertical Pod Autoscaler (VPA).
- **Setup Guide**: How to configure autoscalers, with scenarios and examples.

#### Backup and Disaster Recovery

- **Why It Matters**: Explanation of the importance of backups, especially for etcd (Kubernetes’ key-value store).
- **Guide**: Steps for backing up etcd and restoring it, with disaster recovery plan best practices.

#### Cluster Upgrades

- **Description**: Overview of the upgrade process and planning.
- **Procedure**: Step-by-step instructions for safely upgrading Kubernetes, managing node pools, and testing upgrades.

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