Picture this: your team just spun up a new Kubernetes cluster on EKS, ready to scale production workloads. Someone jokes about “pushing straight to prod,” and half the room laughs too hard. You know the reason. Connecting CI/CD systems like GitLab to EKS reliably, without brittle secrets or manual role juggling, is still a small pain disguised as automation.
Amazon EKS handles the heavy lifting of running Kubernetes on AWS—control planes, node groups, network policies. GitLab, meanwhile, runs your pipelines, tests, and deployments. When they talk cleanly to each other, infrastructure shifts from “set up once and pray” to “documented, auditable, and repeatable.”
The magic lies in using identity federation rather than static keys. With OpenID Connect (OIDC), GitLab’s runner can assume an AWS IAM role directly, skipping the need for long-lived credentials. Each pipeline job authenticates dynamically, receives scoped permissions, and leaves nothing to clean up. This is what people mean when they say EKS GitLab integration “just works.”
In practice, the flow looks like this: you create a dedicated IAM role and trust policy for GitLab’s OIDC provider. The runner requests that role at job runtime, using token exchange. Kubernetes handles the in-cluster service accounts and RBAC policies that map those assumed identities to deployment rights. The end result is deterministic permission boundaries with zero shared secrets.
Quick Answer: How do I connect EKS and GitLab?
Configure GitLab’s OIDC credentials under your repository or pipeline settings, create a corresponding IAM role for that identity in AWS, and link it to your EKS service account. Each job then authenticates through OIDC and receives temporary permissions to deploy or manage resources securely.