Cluster Management
This chapter covers the routine operations needed to keep an Apache Doris cluster healthy in production, including version upgrades, capacity changes, network topology, and replica maintenance.
Cluster Lifecycle
Cluster Upgrade
Rolling upgrade guide covering version compatibility rules, metadata compatibility testing, and FE/BE upgrade steps
Elastic Scaling
Add or remove FE/BE nodes online without interrupting business, using DROP or DECOMMISSION for scale-in
Topology and Access
FQDN
Enable FQDN (Fully Qualified Domain Name) mode for new clusters, existing cluster migration, and Kubernetes deployments
FE Load Balancing
Load balancing options for multi-FE deployments — JDBC, Nginx, HAProxy, ProxySQL — plus client IP forwarding via Proxy Protocol
