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docs: DOC-2336 Generate release 4.8.21 updates (#9202)
* Generate release 4.8.21 updates first draft * Update _palette-kubernetes-versions.mdx * Update _palette-vmware-kubernetes-versions.mdx * Update _palette-vmware-kubernetes-versions.mdx * Update pcg.md * Update cli-tools.md * Final release updates * Update docs/docs-content/clusters/cluster-management/cert-manager-addon.md --------- Co-authored-by: Amanda Churi Filanowski <[email protected]>
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‎_partials/_palette-kubernetes-versions.mdx‎

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| **Palette Version** <!-- kubernetes-max-version-table --> | **Highest Supported Kubernetes Version** |
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| ------------------- | ---------------------- |
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| <!-- k8s-max-4-8-a --> 4.8.21 | 1.35.5 |
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| <!-- k8s-max-4.8.0 --> 4.8.6 | 1.34.2 |
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| <!-- k8s-max-4-7-c --> 4.7.27 | 1.33.0 |
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| <!-- k8s-max-4.7.b --> 4.7.20 | 1.33.0 |

‎_partials/self-hosted/_palette-vmware-kubernetes-versions.mdx‎

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| **Palette Version** <!-- vmware-kubernetes-version-table --> | **Kubernetes Version** | **OVA Download URL** |
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| ------------------- | ---------------------- | --------------------------------------------------------------------------- |
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| <!-- vmware-k8s-4-8-a --> 4.8.21 | 1.32.9 | `https://vmwaregoldenimage.s3.amazonaws.com/u-2204-0-k-1329-0.ova` |
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| <!-- vmware-k8s-4.8.0 --> 4.8.6 | 1.32.9 | `https://vmwaregoldenimage.s3.amazonaws.com/u-2204-0-k-1329-0.ova` |
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| <!-- vmware-k8s-4-7-c --> 4.7.27 | 1.32.8 | `https://vmwaregoldenimage.s3.amazonaws.com/u-2204-0-k-1328-0.ova` |
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| <!-- vmware-k8s-4.7.b --> 4.7.20 | 1.31.8 | `https://vmwaregoldenimage.s3.amazonaws.com/u-2204-0-k-1318-0.ova` |

‎_partials/vertex/_palette-vmware-kubernetes-versions.mdx‎

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| **Palette Version** <!-- vmware-kubernetes-version-table --> | **Kubernetes Version** | **FIPS OVA Download URL** |
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| ------------------------------------------------------------ | ---------------------- | ------------------------------------------------------------------------------ |
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| <!-- vmware-k8s-4-8-a --> 4.8.21 | 1.32.9 | `https://vmwaregoldenimage.s3.amazonaws.com/u-2004-0-k-1329-fips.ova` |
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| <!-- vmware-k8s-4.8.0 --> 4.8.6 | 1.32.9 | `https://vmwaregoldenimage.s3.amazonaws.com/u-2004-0-k-1329-fips.ova` |
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| <!-- vmware-k8s-4-7-c --> 4.7.27 | 1.32.8 | `https://vmwaregoldenimage.s3.amazonaws.com/u-2004-0-k-1328-fips.ova` |
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| <!-- vmware-k8s-4.7.b --> 4.7.20 | 1.31.8 | `https://vmwaregoldenimage.s3.amazonaws.com/u-2004-0-k-1318-fips.ova` |

‎docs/docs-content/automation/palette-cli/install-palette-cli.md‎

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<!-- palette-cli-version-output -->
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```shell hideClipboard
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Palette CLI version: 4.8.2
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Palette CLI version: 4.8.5
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```
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## Next Steps

‎docs/docs-content/clusters/cluster-management/cert-manager-addon.md‎

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tags: ["clusters", "cluster management", "cert-manager"]
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---
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The Cert Manager pack automates the process of issuing, renewing, and managing TLS certificates for application and
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ingress workloads. These certificates can either be self-signed or sourced from certificate authorities, such as Let's
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Encrypt, and HashiCorp Vault. Cert Manager also supports both standard and wildcard certificates.
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The [Cert Manager](/integrations/packs/?pack=certmanager) pack automates the process of issuing, renewing, and managing
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TLS certificates for application and ingress workloads. These certificates can either be self-signed or sourced from
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certificate authorities, such as Let's Encrypt and HashiCorp Vault. Cert Manager also supports both standard and
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wildcard certificates.
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The architecture is divided between three main components: `Issuer`, `ClusterIssue` and `Certificate`. `CRD: Issuer`
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determines who to request a certificate from and how to request that certificate for a specific namespace. The
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`CRD: ClusterIssuer` addresses certificate requests at the cluster level. `CRD: Certificate` determines which
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certificate, secret name and DNS are to be used at a namespace level.
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certificate, secret name, and DNS are to be used at a namespace level.
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Cert Manager requests a certificate when `Issuer` or `ClusterIssuer` are created. The key and certificate are then
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stored in a Kubernetes secret. Cert Manager monitors the certificate expiration, and does automatic renewals before the
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stored in a Kubernetes secret. Cert Manager monitors the certificate expiration and does automatic renewals before the
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certificate expires as necessary.
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![Cert Manager architecture](/clusters_cluster-management_cert-manager_4-8-a.webp)
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- CloudStack
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- VMware
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## Prerequisites
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## Limitations
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- New cluster built on 4.8.a.
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- Existing cluster upgraded to 4.8.a before adding Cert Manager add-on pack.
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- Cert Manager customizations are only supported in clusters running Palette agent version 4.8.9 or later.
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## Enablement
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‎docs/docs-content/clusters/pcg/pcg.md‎

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| **Palette Version** <!-- pcg-kubernetes-version-table --> | **Kubernetes Version** |
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| --------------------------------------------------------- | ---------------------- |
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| <!-- pcg-k8s-4-8-a --> 4.8.21 | 1.32.9 |
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| <!-- pcg-k8s-4.8.0 --> 4.8.6 | 1.32.9 |
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| <!-- pcg-k8s-4-7-c --> 4.7.27 | 1.32.8 |
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| <!-- pcg-k8s-4.7.b --> 4.7.20 | 1.31.8 |

‎docs/docs-content/downloads/cli-tools.md‎

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| Palette Release <!-- palette-cli-version-table --> | Recommended CLI Version | Download URL | Checksum (SHA256) |
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| -------------------------------------------------- | -------------------------------- | ---------------------------------------------------------------------- | ------------------------------------------------------------------ |
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| <!-- cli-4-8-a --> 4.8.21 | 4.8.5 | https://software.spectrocloud.com/palette-cli/v4.8.5/linux/cli/palette | `6c5928a96498111126d17260dfeb3354b6793e87cfad1b8b1103ddaa4069807b` |
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| <!-- cli-4.8.0 --> 4.8.6 | 4.8.2 | https://software.spectrocloud.com/palette-cli/v4.8.2/linux/cli/palette | `926c80d0a62c2b22df31856cdb680475f9423c3c3ef7bf3a6008888589a28217` |
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| <!-- cli-4-7-c --> 4.7.27 | 4.7.4 | https://software.spectrocloud.com/palette-cli/v4.7.4/linux/cli/palette | `48edf70b44c493230215a037531a97bdefdfc6d128d258c8ce78ddb06f331f00` |
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| <!-- cli-4.7.b --> 4.7.20 | 4.7.2 | https://software.spectrocloud.com/palette-cli/v4.7.2/linux/cli/palette | `8350d1c84cbb000316e3c5e3fee2a8ce63157bcada8ddbb57cc670ed9d0da5ac` |
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| Palette Release <!-- edge-version-table --> | CLI Version | Download URL | Checksum (SHA256) |
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| ------------------------------------------- | -------------------------- | ----------------------------------------------------------------------- | ------------------------------------------------------------------ |
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| <!-- edge-4-8-a --> 4.8.21 | 4.8.8 | https://software.spectrocloud.com/stylus/v4.8.8/cli/linux/palette-edge | `717325354dbf313aed2011d18b92f5906572749fb81ce8fe060c54ff25e38734` |
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| <!-- edge-4.8.0 --> 4.8.6 | 4.8.1 | https://software.spectrocloud.com/stylus/v4.8.1/cli/linux/palette-edge | `112ff4671fa6e585504ecf53d07add5cd76533b6a648822638ae2e86afe39463` |
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| <!-- edge-4-7-c --> 4.7.27 | 4.7.16 | https://software.spectrocloud.com/stylus/v4.7.16/cli/linux/palette-edge | `49eda70a5e3d7b1d3b912288c130b03097929f0ab762a2b6dc45232016caa433` |
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| <!-- edge-4.7.b --> 4.7.20 | 4.7.13 | https://software.spectrocloud.com/stylus/v4.7.13/cli/linux/palette-edge | `888cca0cbc38cd7e2073662711922a5297c50f9cf0f1ddd78c31c02a475c159a` |

‎docs/docs-content/release-notes/announcements.md‎

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| Change | Release | Date |
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| ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------- | ------------------ |
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| The `stylus.installationMode` [Edge Installer Configuration](../clusters/edge/edge-configuration/installer-reference.md) flag is no longer available. Use the `stylus.managementMode` flag instead, which has two allowed values: `central`, which means the Edge host is connected to Palette, and `local`, which means the Edge host has no connection to a Palette instance. Refer to the [Prepare User Data](../clusters/edge/edgeforge-workflow/prepare-user-data.md) guide for further information. | 4.8.a | January 17, 2026 |
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| The `stylus.installationMode` [Edge Installer Configuration](../clusters/edge/edge-configuration/installer-reference.md) flag is no longer available. Use the `stylus.managementMode` flag instead, which has two allowed values: `central`, which means the Edge host is connected to Palette, and `local`, which means the Edge host has no connection to a Palette instance. Refer to the [Prepare User Data](../clusters/edge/edgeforge-workflow/prepare-user-data.md) guide for further information. | 4.8.21 | January 17, 2026 |
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| The `spec.jsonCredentialsFileUid` field in API requests is no longer available. Users who create GCP cloud accounts using the API should use the `spec.jsonCredentials` field to supply their credentials in JSON format. Refer to the [API documentation](/api/introduction) for further details. | 4.7.20 | September 13, 2025 |
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| The `spectrocloud_macro` Terraform resource is no longer available. We recommend using the `spectrocloud_macros` resource to create and manage service output variables and macros. For more information, refer to the Spectro Cloud Terraform provider [documentation](https://registry.terraform.io/providers/spectrocloud/spectrocloud/latest/docs). | 4.7.20 | September 13, 2025 |
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| The `tc` subcommand of the [Palette CLI](../automation/palette-cli/palette-cli.md) is no longer available. This command provided functionality for deploying target clusters using the Palette CLI. We recommend using the [Spectro Cloud Terraform provider](https://registry.terraform.io/providers/spectrocloud/spectrocloud/latest/docs) for cluster deployment automation. | 4.7.13 | August 17, 2025 |

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

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| Description | Publish Date | Product Component | Fix Version |
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| ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------------ | ---------------------------- | ----------- |
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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 | 4.8.a |
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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 | 4.8.21 |
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| [Agent mode](../deployment-modes/agent-mode/agent-mode.md) Edge cluster nodes configured with Agent version 4.8.1 may lose pre-existing `systemd-networkd` configurations (VLANs, bonds, and bridges) after a reboot. This occurs because the cleanup logic intended to remove stale VLAN configurations inadvertently deletes valid, pre-existing configurations not created through user data. | December 5, 2025 | Edge | 4.8.12 |
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| Users cannot create Ubuntu 20.04 FIPS ISO images using CanvOS version 4.7.16. | November 14, 2025 | Edge | 4.7.30 |
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| Cluster deployments may fail after upgrading the Cluster API Provider AWS (CAPA) if the Instance Metadata Service Version 2 (IMDSv2) is configured with **Metadata version** set to **V2 only (token required)** in the Amazon Elastic Compute Cloud (EC2) settings. | September 1, 2025 | Clusters | 4.7.21 |

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