Red Hat Summit1장. OpenShift image registry overview
OpenShift Container Platform can build images from your source code, deploy them, and manage their lifecycle. OpenShift Container Platform provides an internal, integrated container image registry that can be deployed in your OpenShift Container Platform environment to locally manage images. The overview section includes OpenShift image registry reference information and links for registries commonly used with OpenShift Container Platform.
1.1. Glossary of common terms for OpenShift image registry
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This glossary defines the common terms that are used in the registry content.
- container
- Lightweight and executable images that consist of software and all its dependencies. Because containers virtualize the operating system, you can run containers in a data center, a public or private cloud, or your local host.
- image repository
- An image repository is a collection of related container images and tags identifying images.
- mirror registry
- The mirror registry is a registry that holds the mirror of OpenShift Container Platform images.
- namespace
- A namespace isolates groups of resources within a single cluster.
- pod
- The pod is the smallest logical unit in Kubernetes. A pod consists of one or more containers to run in a compute node.
- private registry
- A registry is a server that implements the container image registry API. A private registry is a registry that requires authentication so that users can access the content of the registry.
- public registry
- A registry is a server that implements the container image registry API. A public registry is a registry that serves its content publicly.
- Quay.io
- A public Red Hat Quay Container Registry instance provided and maintained by Red Hat, which serves most of the container images and Operators to OpenShift Container Platform clusters.
- OpenShift image registry
- OpenShift image registry is the registry provided by OpenShift Container Platform to manage images.
- registry authentication
- To push and pull images to and from private image repositories, the registry needs to authenticate its users with credentials.
- route
- Exposes a service to allow for network access to pods from users and applications outside the OpenShift Container Platform instance.
- scale down
- To decrease the number of replicas.
- scale up
- To increase the number of replicas.
- service
- A service exposes a running application on a set of pods.
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