High Availability
The Control Panel uses Raft-based clustering to ensure the fleet management system remains operational even if individual nodes go down. The CC HA page in the dashboard shows the current state of the cluster.
Cluster Status
The HA page displays:
- Node list — all nodes with their role (leader or follower) and status
- Leader indicator — which node is currently handling operations
- Replication status — whether all nodes are in sync
- Cluster health — overall health based on node availability
Node Statuses
| Status | Meaning |
|---|---|
| Active | Node is running and participating in the cluster |
| Syncing | Node is catching up on state replication |
| Unreachable | Node cannot be contacted |
Rolling Upgrades
When a platform upgrade is available, the HA system supports coordinated rolling upgrades to maintain availability throughout the process:
- Followers are upgraded one at a time
- Each node is taken out of the cluster, upgraded, and rejoined
- After all followers are upgraded, leadership transfers to an upgraded node
- The original leader is upgraded and rejoins
During a rolling upgrade, the cluster operates with reduced capacity but remains available. No downtime is expected.
Manual Failover
You can trigger a manual leadership transfer from the CC HA page:
- Click Transfer Leadership
- Select the target node
- Confirm the transfer
This is useful for planned maintenance or rebalancing.
Next Steps
- Fleet Management — manage your fleet
- Managed Hosting — provision servers with high-availability oversight