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Release notes

Red Hat Service Interconnect 2.1

Latest information about features and issues in this release

Abstract

These release notes contain the latest information about new features, enhancements, fixes, and issues contained in the Red Hat Service Interconnect 2.1 release.
Red Hat Service Interconnect is a Red Hat build of the open source Skupper project.

Chapter 1. New and changed features
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Red Hat Service Interconnect is the Red Hat build of Skupper.

The following features are included in Red Hat Service Interconnect version 2.1:

  • You can now redeem tokens in a local system site.
  • You can now install the Network Observer using an operator.
  • CRD documentation - all resources now include documentation. For example, you can view details of a CR in OpenShift console or using kubectl explain.
  • Removal of some CLI shortcuts, for example -r. You must now specify the full parameter, for example --routing-key.
  • You can now specify high availability when creating a site using the CLI. For example skupper site create --enable-ha.
  • Exposing services from other namespaces is now fully supported.
  • You can now install the controller (as a container) on local systems using the CLI command: skupper system install
  • The CLI commands for skupper system have been refactored

Chapter 2. Long term support
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Red Hat Service Interconnect 1.8 is available as a long term support (LTS) release version.

See Red Hat Service Interconnect 1.8 documentation for more information.

Chapter 3. Supported configurations
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Expand
Table 3.1. CLI
 x86-64aarch64s390xppc64le

Red Hat Enterprise Linux 8

Yes

Yes

Yes

 

Red Hat Enterprise Linux 9

Yes

Yes

Yes

 

Red Hat Enterprise Linux 10

    

Kubernetes sites

Service Interconnect is supported on all versions of Red Hat OpenShift Container Platform that are in Full or Maintenance support. For more information, see the following articles:

Support for Non-OpenShift distributions of Kubernetes requires Kubernetes version 1.28 or later.

Ingress types

  • LoadBalancer
  • OpenShift Routes (supported only on OpenShift)

Other ingress types fall under commercially reasonable support.

Operator

The operator is supported with OpenShift 4.x only.

Expand
Table 3.2. Podman sites
 x86-64aarch64s390xppc64le

Red Hat Enterprise Linux 8

Yes

Yes

Yes

 

Red Hat Enterprise Linux 9

Yes

Yes

Yes

 

Router

For use in Kubernetes sites and as a gateway for containers or machines.

Expand
 x86-64aarch64s390xppc64le

Red Hat Enterprise Linux 8

Yes

Yes

Yes

 

Red Hat Enterprise Linux 9

Yes

Yes

Yes

 
Note

The Skupper router is not supported for standalone use as a messaging router.

3.1. Commercially reasonable support
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Table 3.3. CLI
 x86-64aarch64s390xppc64le

Linux

Yes

Yes

Yes

 

Mac

Yes

   

Windows

Yes

   

Distributions

Red Hat will provide assistance running Service Interconnect on any CNCF-certified distribution of Kubernetes. Note, however, that our testing is done on OpenShift.

Ingress types

  • Gateway
  • Contour
  • Nginx (This requires configuration for TLS passthrough.)
  • NodePort

Podman sites

Service Interconnect requires Podman version 4 or later.

Expand
 x86-64aarch64s390xppc64le

Linux

Yes

Yes

Yes

 

Upgrades

  • Red Hat supports upgrades from one downstream minor version to the next, with no jumps.
  • While Red Hat aims to have compatibility across minor versions, Red Hat recommends upgrading all sites to the latest version.

Disconnected operation

Red Hat supports deployment of Service Interconnect in disconnected environments.

Note

If you have applications that require long lived connections, for example Kafka clients, consider using a load balancer as ingress instead of a proxy ingress such as OpenShift route. If you use an OpenShift route as ingress, expect interruptions whenever routes are configured.

For information about the latest release, see Red Hat Service Interconnect Supported Configurations.

Chapter 4. Technology Preview features
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Some features in this release are currently in Technology Preview. This section describes the Technology Preview features in Red Hat Service Interconnect 2.1.

Important

Technology Preview features are not supported with Red Hat production service level agreements (SLAs) and might not be functionally complete. Red Hat does not recommend using them in production. These features provide early access to upcoming product features, enabling customers to test functionality and provide feedback during the development process. For more information about the support scope of Red Hat Technology Preview features, see Technology Preview Features Support Scope.

Certificate rotation
You can now rotate certificates as described in README.
Exposing pods by name
You can create connectors using pod names to expose those pods on the application network.

Chapter 5. Upgrading sites
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To upgrade a site, you need to upgrade the controller using the same method you used to install the Red Hat Service Interconnect, that is, one of the following:

  • Updating the operator
  • Applying the latest YAML
  • For local systems skupper system install and skupper system reload

Chapter 6. Fixed issues
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See Red Hat Service Interconnect Resolved Issues for 2.1.x for a list of issues that have been fixed in this release.

Chapter 7. Known issues
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  • SKUPPER-2584 - Multiple Skupper Links

    You can create multiple links from one site to another. However, the links do not perform as expected. For example, traffic flow across multiple links with different costs might not be as expected.

    Workaround

    To workaround this issue, make sure a link does not exist before creating a new link.

  • SKUPPER-2569 - Link cost is not updatable

    If you create a link and later attempt to change the link cost, the update fails.

    Note

    The kubectl get link command reports the updated link cost, however, that link cost does not affect traffic flow.

    Workaround

    To workaround this issue, delete the link and create it again with the desired link cost.

Revised on 2025-10-03 09:26:45 UTC

Legal Notice
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