Conclusion

Cluster migration is a critical operation that requires careful planning, execution, and verification. By following this guide and using the provided backup and restore scripts, you can successfully migrate your K3s cluster from one VM to another while preserving all data and configurations.

Key takeaways:

• Always verify prerequisites before starting migration

• Take backups in the correct order and verify their integrity

• Restore services in dependency order: Consul, PostgreSQL, Elasticsearch

• Perform comprehensive verification after migration

• Document the process and any issues encountered

• Consider third-party tools for complex or recurring migration needs