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 * Products & Services
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 * Firewall changes for container image pulls


FIREWALL CHANGES FOR CONTAINER IMAGE PULLS

Updated Yesterday at 1:36 PM -
English
 * English
 * Chinese
 * Japanese

The Red Hat container image registries are changing, and this means you may need
to adjust firewall settings. Please be sure to make this adjustment by May 1,
2023.


WHAT TO CHANGE

Currently all image manifests and filesystem blobs are served directly from
registry.redhat.io and registry.access.redhat.com. The coming change will mean
filesystem blobs are served from Quay.io instead. To avoid problems pulling
container images, you will need to allow outbound TCP connections (ports 80 and
443) to these hostnames:

 * cdn.quay.io
 * cdn01.quay.io
 * cdn02.quay.io
 * cdn03.quay.io

This change should be made to any firewall configuration that specifically
allows outbound connections to registry.redhat.io or registry.access.redhat.com.
After making this change you will be able to continue pulling images from
registry.redhat.io and registry.access.redhat.com as before. You do not need a
Quay.io login, or to interact with the Quay.io registry directly in any way, in
order to continue pulling Red Hat container images.

Outbound connections to these hosts may already be allowed in your firewall
configuration as a result of having previously followed the OpenShift
installation instructions, or due to otherwise needing to use the Quay.io
registry. Other products synchronizing or downloading container images from the
Red Hat registry, such as Red Hat Ansible Automation Platform (AAP) or Red Hat
Satellite, may need changes to their relevant firewall or proxy to allow
outbound access to the hosts listed above.

We recommend using the hostnames instead of IP addresses when configuring
firewall rules. See this article for more information.


WHY THIS CHANGE IS COMING

Red Hat OpenShift operator index images are already served from
registry.redhat.io using Quay.io as the backend. We are extending this to all
Red Hat container images. This allows customers to benefit from the high
availability of the Quay.io registry while simplifying the way Red Hat delivers
container images and paving the way for future enhancements.


TESTING

You can confirm image pulls will continue to work ahead of the registry change.
To do so, pull the registry.redhat.io/redhat/redhat-operator-index:v4.12 image,
which already has filesystem blobs hosted on Quay.io. To do this, run the
following commands using your Customer Portal credentials:

Raw

podman login registry.redhat.io
podman pull registry.redhat.io/redhat/redhat-operator-index:v4.12
echo $?


If the image was pulled successfully the echo $? command will show "0".


ADDITIONAL INFORMATION

Other than this change, many things are staying the same as before:

 * Red Hat container images will continue to be signed in the same way, and with
   the same keys.
 * Container image manifests are served directly from registry.redhat.io and
   registry.access.redhat.com. Redirects to the Quay.io CDN are only for config
   and filesystem blobs.
 * Pulling an image by its sha256 digest must still be done using its schema 2
   digest (see this earlier article).
 * Image tags, schema 2 digests, image IDs, and signatures remain unchanged.
 * Images pulled before the change is made remain valid and do not need to be
   re-pulled.
 * No changes relating to ImageContentSourcePolicy are needed for OpenShift or
   Kubernetes clusters.
 * For OpenShift or Kubernetes clusters, no node restarts, cache changes, or
   upgrades of any kind are needed.

Allowing outbound connections to the hostnames mentioned above may resolve the
following issues, depending on the characteristics of the firewall you use:

 * Connection refused when pulling images
 * I/O timeout when pulling images
 * ImagePullBackOff status when pulling images within an OpenShift or Kubernetes
   cluster

Here are example errors you might see from "podman pull" with different firewall
configurations:

Raw

Trying to pull [...]...
WARN[0033] Failed, retrying in 1s ... (1/3). Error: copying system image from manifest list: parsing image configuration: Get "https://cdn02.quay.io/sha256/[...]": dial tcp [...]: i/o timeout
WARN[0065] Failed, retrying in 1s ... (2/3). Error: copying system image from manifest list: parsing image configuration: Get "https://cdn02.quay.io/sha256/[...]": dial tcp [...]: i/o timeout
WARN[0099] Failed, retrying in 1s ... (3/3). Error: copying system image from manifest list: parsing image configuration: Get "https://cdn02.quay.io/sha256/[...]": dial tcp [...]: i/o timeout
Error: copying system image from manifest list: parsing image configuration: Get "https://cdn02.quay.io/sha256/[...]": dial tcp [...]: i/o timeout


Raw

Trying to pull [...]...
WARN[0033] Failed, retrying in 1s ... (1/3). Error: copying system image from manifest list: parsing image configuration: Get "https://cdn02.quay.io/sha256/[...]": dial tcp [...]: connect: connection refused
WARN[0065] Failed, retrying in 1s ... (2/3). Error: copying system image from manifest list: parsing image configuration: Get "https://cdn02.quay.io/sha256/[...]": dial tcp [...]: connect: connection refused
WARN[0099] Failed, retrying in 1s ... (3/3). Error: copying system image from manifest list: parsing image configuration: Get "https://cdn02.quay.io/sha256/[...]": dial tcp [...]: connect: connection refused
Error: copying system image from manifest list: parsing image configuration: Get "https://cdn02.quay.io/sha256/[...]": dial tcp [...]: connect: connection refused



GETTING HELP

Your Red Hat account team or Red Hat partner is available for guidance.
Alternatively, reach out to our support experts:
https://access.redhat.com/support/.

 * Tags
 * containers
 * docker
 * firewall
 * podman
 * registry

 * Article Type
 * General


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