high-availability-add-on
latest
false
- Overview
- Requirements
- Hardware requirements
- Software requirements
- Installation
- Upgrade
- Troubleshooting
High Availability Add-on installation guide
Last updated Apr 22, 2026
Hardware requirements
The hardware requirements for your High Availability Add-on (HAA) are different between development and production environments.
Development environments
The following table describes the minimum requirements and recommended values for each item:
| Item | Minimum Requirements | Recommended |
|---|---|---|
| HAA Nodes | 1 | 3 |
| RAM | 6 GB | 8 GB |
Storage (default path /opt/redislabs) | 10 GB | 20 GB |
While one node is sufficient for a development environment, three or an odd number of nodes are recommended in order to utilize the clustering features likely needed for your production environment.
Production environments
The following table describes the minimum requirements and recommended values for each item:
| Item | Minimum Requirements | Recommended |
|---|---|---|
| HAA Nodes | 3 | 3 |
| Cores per Node | 4 | 8+ |
| RAM | 6 GB (15 GB for deployments) | 30+ GB |
Storage (default path /opt/redislabs) | 75 GB | 150+ GB |
| Network | 1 Gbps | 10+ Gbps |
Note:
Always maintain an odd number of nodes. This is required to obtain a quorum needed in failure and failover scenarios.
Ports
The following table describes each port and their respective protocol:
| Port | Protocol | Description |
|---|---|---|
| 1968 | TCP | Default port used for internal proxy traffic. |
| 3333-3344 36379-36380 | TCP | Default port ranges used for internal cluster traffic. |
| 8001 | TCP | Used for traffic from the application to the Discovery Service, if applicable. |
| 8443 | TCP | Used for HTTPS access to the management UI. |
| 8444, 9080 | TCP | Default ports used for internal nginx < - > cnm_http/cm traffic. |
| 9081 | TCP | Default port used for internal CRDB (Conflict-free Replicated Database) traffic. Also required for Active-Active replication coordination. |
| 8070-8071 | TCP | Used for metrics exported and managed by nginx. |
| 9443 | TCP | Recommended port for REST API traffic. Used in Active-Active node bootstrap and cluster management. |
| 10000-19999 | TCP | Port range for database traffic. By default, HAA uses port 10000. Required for Active-Active database sync. |
| 20000-29999 | TCP | Port range used for internal database shards traffic. |
| 53, 5353 | UDP | Used for internal DNS/mDNS traffic. |
| 8002, 8004, 8006 | TCP | System health monitoring. |
| ICMP | Used to check connectivity between nodes. |