DOC-4927 Created placeholders for RS April release notes

Author: rrelledge

content/operate/rs/release-notes/rs-7-22-releases/_index.md

@@ -0,0 +1,120 @@
+---
+Title: Redis Enterprise Software release notes 7.22.x
+alwaysopen: false
+categories:
+- docs
+- operate
+- rs
+compatibleOSSVersion: Redis 7.4.0
+description: New pricing and packaging. TBA
+hideListLinks: true
+linkTitle: 7.22.x releases
+toc: 'true'
+weight: 68
+---
+
+​[​Redis Enterprise Software version 7.22](https://redis.io/downloads/#software) is now available!
+
+## Highlights
+
+This version offers:
+
+- New pricing and packaging
+
+- TBA
+
+## Detailed release notes
+
+For more detailed release notes, select a build version from the following table:
+
+{{<table-children columnNames="Version&nbsp;(Release&nbsp;date)&nbsp;,Major changes,Redis CE compatibility" columnSources="LinkTitle,Description,compatibleOSSVersion" enableLinks="LinkTitle">}}
+
+## Version changes
+
+### Breaking changes
+
+- TBA
+
+### Product lifecycle updates
+
+- TBA
+
+### Deprecations
+
+#### API deprecations
+
+- TBA
+
+#### V1 Prometheus metrics deprecation
+
+ V1 Prometheus metrics are deprecated but still available. To transition to the new metrics stream engine, either migrate your existing dashboards using [Prometheus v1 metrics and equivalent v2 PromQL]({{<relref "/integrate/prometheus-with-redis-enterprise/prometheus-metrics-v1-to-v2">}}) now, or wait to use new preconfigured dashboards when they become available in a future release.
+
+### Upcoming changes
+
+- TBA
+
+### Supported platforms
+
+The following table provides a snapshot of supported platforms as of this Redis Enterprise Software release. See the [supported platforms reference]({{< relref "/operate/rs/references/supported-platforms" >}}) for more details about operating system compatibility.
+
+<span title="Check mark icon">&#x2705;</span> Supported – The platform is supported for this version of Redis Enterprise Software and Redis Stack modules.
+
+<span title="Warning icon" class="font-serif">:warning:</span> Deprecation warning – The platform is still supported for this version of Redis Enterprise Software, but support will be removed in a future release.
+
+| Redis Software<br />major versions | 7.8 | 7.4 | 7.2 | 6.4 | 6.2 |
+|---------------------------------|:-----:|:-----:|:-----:|:-----:|:-----:|
+| **Release date** | Nov 2024 | Feb 2024 | Aug 2023 | Feb 2023 | Aug 2021 |
+| [**End-of-life date**]({{< relref "/operate/rs/installing-upgrading/product-lifecycle#endoflife-schedule" >}}) | Determined after<br />next major release | Nov 2026 | Feb 2026 | Aug 2025 | Feb 2025 |
+| **Platforms** | | | | | |
+| RHEL 9 &<br />compatible distros<sup>[1](#table-note-1)</sup> | <span title="Supported">&#x2705;</span> | <span title="Supported">&#x2705;</span> | – | – | – |
+| RHEL 9<br />FIPS mode<sup>[5](#table-note-5)</sup> | <span title="Supported">&#x2705;</span> | – | – | – | – |
+| RHEL 8 &<br />compatible distros<sup>[1](#table-note-1)</sup> | <span title="Supported">&#x2705;</span> | <span title="Supported">&#x2705;</span> | <span title="Supported">&#x2705;</span> | <span title="Supported">&#x2705;</span> | <span title="Supported">&#x2705;</span> |
+| RHEL 7 &<br />compatible distros<sup>[1](#table-note-1)</sup> | – | – | <span title="Deprecated" class="font-serif">:warning:</span> | <span title="Supported">&#x2705;</span> | <span title="Supported">&#x2705;</span> |
+| Ubuntu 22.04<sup>[2](#table-note-2)</sup> | <span title="Supported">&#x2705;</span> | – | – | – | – |
+| Ubuntu 20.04<sup>[2](#table-note-2)</sup> | <span title="Supported">&#x2705;</span> | <span title="Supported">&#x2705;</span> | <span title="Supported">&#x2705;</span> | <span title="Supported">&#x2705;</span> | – |
+| Ubuntu 18.04<sup>[2](#table-note-2)</sup> | – | <span title="Deprecated" class="font-serif">:warning:</span> | <span title="Deprecated" class="font-serif">:warning:</span> | <span title="Supported">&#x2705;</span> | <span title="Supported">&#x2705;</span> |
+| Ubuntu 16.04<sup>[2](#table-note-2)</sup> | – | – | <span title="Deprecated" class="font-serif">:warning:</span> | <span title="Supported">&#x2705;</span> | <span title="Supported">&#x2705;</span> |
+| Amazon Linux 2 | <span title="Supported">&#x2705;</span> | <span title="Supported">&#x2705;</span> | <span title="Supported">&#x2705;</span> | <span title="Supported">&#x2705;</span> | – |
+| Amazon Linux 1 | – | – | <span title="Supported">&#x2705;</span> | <span title="Supported">&#x2705;</span> | <span title="Supported">&#x2705;</span> |
+| Kubernetes<sup>[3](#table-note-3)</sup> | <span title="Supported">&#x2705;</span> | <span title="Supported">&#x2705;</span> | <span title="Supported">&#x2705;</span> | <span title="Supported">&#x2705;</span> | <span title="Supported">&#x2705;</span> |
+| Docker<sup>[4](#table-note-4)</sup> | <span title="Supported">&#x2705;</span> | <span title="Supported">&#x2705;</span> | <span title="Supported">&#x2705;</span> | <span title="Supported">&#x2705;</span> | <span title="Supported">&#x2705;</span> |
+
+1. <a name="table-note-1"></a>The RHEL-compatible distributions CentOS, CentOS Stream, Alma, and Rocky are supported if they have full RHEL compatibility. Oracle Linux running the Red Hat Compatible Kernel (RHCK) is supported, but the Unbreakable Enterprise Kernel (UEK) is not supported.
+
+2. <a name="table-note-2"></a>The server version of Ubuntu is recommended for production installations. The desktop version is only recommended for development deployments.
+
+3. <a name="table-note-3"></a>See the [Redis Enterprise for Kubernetes documentation]({{< relref "/operate/kubernetes/reference/supported_k8s_distributions" >}}) for details about support per version and Kubernetes distribution.
+
+4. <a name="table-note-4"></a>[Docker images]({{< relref "/operate/rs/installing-upgrading/quickstarts/docker-quickstart" >}}) of Redis Enterprise Software are certified for development and testing only.
+
+5. <a name="table-note-5"></a>Supported only if [FIPS was enabled during RHEL installation](https://docs.redhat.com/en/documentation/red_hat_enterprise_linux/9/html/security_hardening/switching-rhel-to-fips-mode_security-hardening#proc_installing-the-system-with-fips-mode-enabled_switching-rhel-to-fips-mode) to ensure FIPS compliance.
+
+## Known issues
+
+- RS131972: Creating an ACL that contains a line break in the Cluster Manager UI can cause shard migration to fail due to ACL errors.
+
+## Known limitations
+
+#### Upload modules before OS upgrade
+
+If the cluster contains any databases that use modules, you must upload module packages for the target OS version to a node in the existing cluster before you upgrade the cluster's operating system.
+
+See [Upgrade a cluster's operating system]({{<relref "/operate/rs/installing-upgrading/upgrading/upgrade-os">}}) for detailed upgrade instructions.
+
+#### New Cluster Manager UI limitations
+
+The following legacy UI features are not yet available in the new Cluster Manager UI:
+
+- Purge an Active-Active instance.
+
+    Use [`crdb-cli crdb purge-instance`]({{< relref "/operate/rs/references/cli-utilities/crdb-cli/crdb/purge-instance" >}}) instead.
+
+- Search and export the log.
+
+#### RedisGraph prevents upgrade to RHEL 9 
+
+You cannot upgrade from a prior RHEL version to RHEL 9 if the Redis Enterprise Software cluster contains a RedisGraph module, even if unused by any database. The [RedisGraph module has reached end-of-life](https://redis.com/blog/redisgraph-eol/) and is completely unavailable in RHEL 9.
+
+#### Query results might include hash keys with lazily expired fields
+
+If one or more fields of a hash key expire after an `FT.SEARCH` or `FT.AGGREGATE` query begins, Redis does not account for these lazily expired fields. As a result, keys with expired fields might still be included in the query results, leading to potentially incorrect or inconsistent results.