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docs: release notes for 4.8.0 DOC-2293 DOC-2385 (#8721)
* docs: add features and bug fixes to release notes DOC-2293 * docs: release notes for 4.8.0 DOC-2293 DOC-2385 * docs: remove empty headings * Apply suggestions from code review Co-authored-by: Amanda Churi Filanowski <[email protected]> * docs: update packs * docs: add kgateway * docs: tf version * docs: add nginx announcement * docs: update bug fixes and canvos * docs: component updates * docs: fix typo * Apply suggestions from code review Co-authored-by: Amanda Churi Filanowski <[email protected]> * ci: auto-formatting prettier issues * docs: update phrasing * docs: rephrase kgateway alternative * docs: add terraform bug fix DOC-2293 * docs: update known issue * docs: fix vale --------- Co-authored-by: Amanda Churi Filanowski <[email protected]>
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‎docs/docs-content/release-notes/announcements.md‎

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| Change | Target Removal Date | Published Date |
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| <!-- prettier-ignore-start --> The <VersionedLink text="Nginx" url="/integrations/packs/?pack=nginx" /> pack is now deprecated. Use the Kgateway pack as an alternative. Refer to the [Ingress NGINX Retirement: What You Need to Know](https://www.kubernetes.dev/blog/2025/11/12/ingress-nginx-retirement/) blog for further information. <!-- prettier-ignore-end --> | March 1, 2026 | November 22, 2025 |
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| The `stylus.includeTui` [Edge Installer Configuration](../clusters/edge/edge-configuration/installer-reference.md) flag is now deprecated. The Terminal User Interface (TUI) is always enabled regardless of the `stylus.includeTui` value. | May 9, 2026 | November 22, 2025 |
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| [OpenStack](../clusters/data-center/openstack.md) support in Palette is now deprecated and will be removed in a future release. After removal, you will no longer be able to create and manage OpenStack clusters, cluster profiles, cloud accounts, or Private Cloud Gateways. We recommend migrating your workloads to another supported [Data Center environment](../clusters/data-center/data-center.md). | April 4, 2026 | October 18, 2025 |
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| [EKS-optimized Amazon Linux 2 (AL2) AMIs](https://docs.aws.amazon.com/eks/latest/userguide/eks-ami-deprecation-faqs.html) will be disabled in Palette from January 10, 2026 and removed on 4 April, 2026. When disabled, you will no longer be able to select the AL2 AMIs for EKS worker nodes in Palette for new clusters. For existing clusters, you must create new worker nodes using AL2023 AMIs. Existing AL2 AMI worker nodes will no longer receive bug fixes or security patches after the removal date. Refer to our [Scenario - Unable to Upgrade EKS Worker Nodes from AL2 to AL2023](../troubleshooting/cluster-deployment.md#scenario---unable-to-upgrade-eks-worker-nodes-from-al2-to-al2023) guide for help with migrating workloads. | April 4, 2026 | October 18, 2025 |

‎docs/docs-content/release-notes/known-issues.md‎

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| Description | Workaround | Publish Date | Product Component |
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| The [Terminal User Interface (TUI)](../clusters/edge/site-deployment/site-installation/initial-setup.md) introduced in Palette version 4.8.0, using CanvOS version 4.8.0-canvos, does not start automatically on Edge hosts upgraded directly from Palette versions prior to 4.6.32, using CanvOS versions earlier than 4.6.21. | Reboot the hosts, or issue the following command on each host: <br />- `systemctl restart palette-tui` for **appliance mode** <br />- `systemctl restart spectro-palette-tui` for **agent mode** | November 22, 2025 | Edge |
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| The [Terminal User Interface (TUI)](../clusters/edge/site-deployment/site-installation/initial-setup.md) introduced in Palette version 4.8.6, using CanvOS version 4.8.2, does not start automatically on Edge hosts upgraded directly from Palette versions prior to 4.6.32, using CanvOS versions earlier than 4.6.21. | Reboot the hosts, or issue the following command on each host: <br />- `systemctl restart palette-tui` for **appliance mode** <br />- `systemctl restart spectro-palette-tui` for **agent mode** | November 22, 2025 | Edge |
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| Users cannot remove proxy values for connected Edge hosts in Local UI due to a validation error. Proxy values can still be added and updated. | No workaround available. | October 19, 2025 | Edge |
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| On Edge clusters whose hosts run Ubuntu 24.04 with a Unified Kernel Image (UKI), CoreDNS pods may enter the `CrashLoopBackOff` state with logs showing `[FATAL] plugin/loop: Loop (127.0.0.1:<ephemeral-port> -> :53) detected for zone "."`. This happens because `/etc/resolv.conf` is symlinked to `/run/systemd/resolve/stub-resolv.conf`, which lacks real DNS server entries. As a result, CoreDNS forwards DNS queries to itself, creating a recursive loop. | Refer to [Troubleshooting - Edge](../troubleshooting/edge/edge.md#scenario---coredns-pods-stuck-in-crashloopbackoff-due-to-dns-loop) for the workaround. | October 7, 2025 | Edge |
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| Due to strict schema adherence enforcement, [Helm charts](../profiles/cluster-profiles/create-cluster-profiles/create-addon-profile/create-helm-addon.md) with parameters that do not exist in the chart schema fail to install on Palette 4.7.15 or later. | Remove parameters that do not exist in the chart schema from the pack values. Alternatively, add the missing parameters to the chart schema or remove the chart schema file entirely. | September 20, 2025 | Packs |

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