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GitLab Container Registry

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Containerization CI CD DEVOPS Gitlab Container Registry Images

description GitLab Container Registry Overview

The GitLab Container Registry is a centralized repository for storing Docker container images. It’s notable for its integration with GitLab's CI/CD pipeline tools, streamlining application development and deployment workflows. This registry provides secure image management and versioning, primarily benefiting DevOps teams and developers utilizing containerization technologies within the GitLab ecosystem.

help GitLab Container Registry FAQ

How are GitLab Container Registry image names tied to a project?

Images use the registry host followed by the GitLab namespace and project path, such as registry.gitlab.com/group/project/image. This makes repository permissions and CI/CD variables directly useful for image access.

Can GitLab CI build and push an image without a personal access token?

Yes, a pipeline can authenticate with predefined variables such as CI_REGISTRY_USER, CI_REGISTRY_PASSWORD, and CI_REGISTRY. GitLab Runner can then build and push tags associated with the current project.

How can old image tags be removed automatically?

GitLab projects can define cleanup policies that delete tags according to age, name patterns, and the number retained. Protected tags and selected recent tags can be excluded to prevent active releases from being removed.

Does deleting a GitLab registry tag immediately recover all storage?

Not necessarily, because layers can be shared by several manifests and unreferenced blobs may require garbage collection. The exact reclamation process differs between GitLab.com and self-managed GitLab installations.

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