Programming Tutorials

  Few things halt a deployment pipeline faster than an opaque IAM error. If you are migrating from long-lived Service Account JSON keys to Keyless Authentication (Workload Identity Federation) on Google Cloud, you have likely encountered the infamous   OpenID Connect token validation failed   or   Issuer URI mismatch   error. These errors are notoriously difficult to debug because they occur at the intersection of two massive systems: GitHub's OIDC Provider and Google Cloud's Security Token Service (STS). The error messages often obscure the actual root cause: a mismatch between the claims in the JWT (JSON Web Token) generated by GitHub and the attribute mappings configured in your cloud provider. This guide details the root cause of OIDC validation failures, provides a method to inspect the raw token on the fly, and offers the Terraform and CLI configurations to resolve the issue permanently. The Anatomy of a Federation Failure To fix the error, you must unders...

  You have likely arrived here because your Next.js application runs perfectly on   localhost , passes linting, and perhaps even deploys successfully to Vercel. However, when you push to the GitHub repository connected to   IONOS Deploy Now , the pipeline fails. The error logs in GitHub Actions are often opaque, referencing missing directories, failed distinct build steps, or 404 errors on your assets after a "successful" deployment. This is a configuration mismatch between the default behavior of Next.js (Server-Side Rendering/Node.js runtime) and the infrastructure of IONOS Deploy Now, which frequently defaults to serving static assets via Apache/Nginx. This guide covers the root cause and the specific code changes required to stabilize your deployment pipeline. The Root Cause: SSR vs. Static Export By default, running  npm run build  in Next.js produces a hybrid application intended to run on a Node.js server. It creates a  .next  folder containing ...