Requirements for High Availability

This section covers specific requirements for high-availability (HA) deployments for Nexus Repository. Review the following details before starting:

• Requires a Nexus Repository Pro license

  High-availability (HA) deployments are only available for Nexus Repository Pro customers.

• Requires technology outside of Nexus Repository scope

Prepare to have in-house expertise in these technologies. E.g.; Load Balancer, Kubernetes, Helm Charts, Docker, Cloud Infrastructure, etc.

• Requires significant infrastructure and maintenance costs

Evaluate the total investment costs of your architecture to meet your expected traffic and business requirements.

• Requires full testing before implementation in production

Improper deployment to production may result in excessive downtime and data loss.

High Availability Requirements

• Every node must meet the system requirements

The system requirements including the CPU and memory requirements must be met for each node independently. Every node must be on the same version of Nexus Repository with the same configuration in their nexus.properties file.

See Zero Downtime Upgrades to learn more.

• Each node is on a separate server

For fault-tolerant deployments, ensure each Nexus Repository instance is on a physical server. Have different servers for each node to limit the risk of a system failing.

• Deploy to a single region or data center

HA deployments are restricted to a single data center. Deploying across-region leads to significant database latency and data loss. Nexus Repository may be deployed in a federated model to support other regions.

See the Deployment Pattern Library

Technology Requirements

The following external technologies are required for HA deployments:

• A load balancer is required to distribute traffic

Examples include: HAProxy, NGINX, Apache HTTP, AWS ELB, etc.

• Blob stores accessible to active nodes

See Moving Blob Storage

• An external PostgreSQL database accessible to active nodes

A low-latency and high-performance database server is critical for HA deployments.

Supported Infrastructure and Limitations

The following table outlines the supported infrastructure for HA deployments. Our support team's expertise is in AWS technologies. Other cloud infrastructure is supported but may fall outside of where our support team can provide guidance.

You must retain in-house expertise for the technologies you are using for your deployment.