Configure PDBs and node affinity

High availability & resilience

This section provides task-oriented guides for configuring UDS Core for high availability and production resilience. High availability is critical for mission-critical deployments and deserves dedicated attention beyond general operations documentation.

Key topics covered:

• Configuring component redundancy (multiple replicas)
• Setting up horizontal pod autoscaling
• Distributing workloads across availability zones
• Configuring pod disruption budgets
• Implementing health checks and readiness probes
• Resource requests and limits for stable operation
• Node affinity and anti-affinity patterns

Why it’s separate from Operations: Operations focuses on day-2 concerns (troubleshooting, upgrades, maintenance), while HA is a proactive configuration task that platform engineers do during initial setup and scaling.

Target audience: Platform engineers deploying production UDS Core instances who need resilience and uptime guarantees.

Source Material from Previous Docs

This section consolidates content from:

• src/content/docs-old/reference/configuration/resource-configuration-and-ha.md (HA patterns and scaling)
• src/content/docs-old/reference/uds-core/prerequisites.md (capacity planning sections)
• src/content/docs-old/reference/configuration/uds-cluster-configuration.md (cluster-level HA config)
• Various references to HA in feature-specific docs (Istio HA, Keycloak HA, etc.)