certificate-rotation

Automating TLS certificate rotation across GitOps-managed clusters involves discovering expiring certificates, generating replacements, patching manifests, and validating updates via PR-based workflows. This prevents non-compliant cert lifecycles and outages.

The best way to discover expiring TLS certificates is by running a discovery script that inventories certificates across GitOps repositories and Kubernetes secrets, prioritizing them by expiration analysis for large fleet rotation planning.

Yes, you need OpenSSL for certificate generation and jq or yq for parsing and patching GitOps manifests. Git is also required to manage the PR-based rotation workflows and rollback planning.

Yes, you can validate certificate generation and plan rollbacks using standard CI/CD primitives alongside GitOps tools. This ensures safe deployments and recoverability by testing manifest updates before applying them to multi-cluster environments.

TLS certificate rotation is error-prone in GitOps workflows because it requires synchronizing certificate generation, manifest updates, and secret management across multiple clusters, which risks outages if expiration handling is not proactive.

You should consider proactive expiration handling for Kubernetes secrets when managing large fleets of multi-cluster environments, ensuring certificates are discovered, analyzed, and rotated before they expire to maintain application availability.