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Red Hat Universal Base Image

A Red Hat Universal Base Image (UBI) is a type of OCI-compliant base operating system image built from a subset of RHEL, free to use and distribute with optional support and with yum repository access to a subset of RHEL packages.

Images available from DockerHub, a RedHat public registry (registry.access.redhat.com), or a Red Hat-authenticated registry:

• ubi ("Standard"): OpenSSL, microdnf, and utilities like gzip and vi
• ubi-minimal ("Minimal"): Minimized binaries and minimal yum stack.
• ubi-init ("Multi-service"): Less than standard but more than minimal, plus systemd.
• ubi-micro ("Micro"): Most minimal image without even a package manager.

FROM specifications:

• Red Hat public registry:
  • registry.access.redhat.com/ubi8/ubi
  • registry.access.redhat.com/ubi8/ubi-minimal
  • registry.access.redhat.com/ubi8/ubi-init
  • registry.access.redhat.com/ubi8/ubi-micro
• DockerHub:
  • redhat/ubi8
  • redhat/ubi8-minimal
  • redhat/ubi8-init
  • redhat/ubi8-micro

Run Examples

Run a simple program on ubi-minimal:

$ docker run --rm registry.access.redhat.com/ubi8/ubi-minimal sh -c 'exec 5<>/dev/tcp/example.com/80; echo -e "GET / HTTP/1.0\nHost: example.com\n" >&5; cat <&5'

Quay.io

Quay.io is a container registry run by Red Hat. It includes "unlimited storage and serving of public repositories".

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