Observed Signal · Aug 22, 2026 · Technical Release · Source: DEV Community · Impact: 2/5 · Sentiment: Neutral
Keycloak OIDC setup for ALB Gateway API
A technical how-to demonstrating a Terraform/OpenTofu-based setup to use Keycloak as an OIDC identity provider for ALB (Application Load Balancer) Gateway API and Amazon EKS. The article shows configuration examples using the Keycloak Terraform provider, including client configuration (confidential client), client roles, groups, users, client scopes, protocol mappers (username, roles, audience), and example JWT claims. The author describes using a service-account client for testing and a JWT-federated client for GitHub Actions, and notes a next step to inject client parameters into Kubernetes secrets via External Secrets Operator and Flux CD.
Practical technical guidance on using Keycloak OIDC with ALB CRDs and EKS is useful for infrastructure and identity teams, but has limited direct impact on the broader AdTech industry.
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Key Takeaways & Evidence Grounding
- The article provides Terraform/OpenTofu configuration using the official Keycloak Terraform provider to set up Keycloak as an OIDC provider.
- Testing used a service-account (Client Credentials) client and environment variables for provider configuration; GitHub Actions runners used a JWT-federated client.
- The post includes concrete Terraform snippets for client (confidential), client roles, groups, users, client scopes, protocol mappers (username, roles, audience), and role scope mappings.
- Important JWT claims highlighted: iss (issuer), aud (audience), roles, and username.
- Publication date (webpage metadata): 2026-08-22.
Connected Companies & Entities
2 Entities mapped“I tested using ALB CRDs to offload JWT validation for OIDC-based authentication to the Amazon EKS Kubernetes API....”
“For GitHub Actions runners, I used a JWT-federated client....”
Ontology Mapping & Concepts
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Implementing RFC 8693 Token Exchange in AgentGateway
This tutorial (published 2026-07-13) demonstrates how to implement RFC 8693 OAuth 2.0 token exchange in AgentGateway, a Rust-based agentic AI proxy from the AI Agent Infrastructure Foundation (AAIF). It walks through a local end-to-end setup using Keycloak as the identity provider: building AgentGateway, running Keycloak and an echo upstream, configuring the backendAuth.oauthTokenExchange policy, exercising token exchange calls, verifying JWT transformations, and testing caching. The article explains three supported exchange mechanisms (RFC 8693 token exchange, RFC 7523 JWT bearer, and Microsoft Entra OBO), advanced configuration options (custom subject/actor tokens, output header location, cache control), troubleshooting, and production considerations (secrets, Kubernetes, monitoring, TTL tuning).
Entra ID + Cloudflare Access: Terraform Zero Trust Demo
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Production-grade 3-tier AWS architecture with Terraform
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