K8s: helm upgrade changes

content/operate/kubernetes/deployment/helm.md

@@ -99,6 +99,39 @@ helm install <operator-name> redis/redis-enterprise-operator \
     --values <path-to-values-file>
 ```
 
+## Upgrade the chart
+
+To upgrade an existing Helm chart installation:
+
+```sh
+helm upgrade <release-name> <path-to-chart>
+```
+
+For example, to upgrade a chart with the release name `my-redis-enterprise` from the chart's root directory:
+
+```sh
+helm upgrade my-redis-enterprise .
+```
+
+You can also upgrade using the Redis Helm repository:
+
+```sh
+helm upgrade <release-name> redis/redis-enterprise-operator --version <chart-version>
+```
+
+To upgrade the chart on **OpenShift**, include the `openshift.mode=true` parameter:
+
+```sh
+helm upgrade <release-name> <path-to-chart> \
+     --set openshift.mode=true
+```
+
+The upgrade process automatically updates the operator and its components, including the Custom Resource Definitions (CRDs). The CRDs are versioned and update only if the new version is higher than the existing version.
+
+After you upgrade the operator, you might need to upgrade your Redis Enterprise clusters, depending on the Redis software version bundled with the operator. For detailed information about the upgrade process, see [Redis Enterprise for Kubernetes upgrade documentation](https://redis.io/docs/latest/operate/kubernetes/upgrade/).
+
+For more information and options when upgrading charts, see [helm upgrade](https://helm.sh/docs/helm/helm_upgrade/).
+
 ## Uninstall
 
 1. Delete any custom resources managed by the operator. See [Delete custom resources]({{<relref "operate/kubernetes/re-clusters/delete-custom-resources">}}) for detailed steps. You must delete custom resources in the correct order to avoid errors.
@@ -115,7 +148,7 @@ This removes all Kubernetes resources associated with the chart and deletes the
 
 ## Known limitations
 
-- Only new installations of the Redis operator are supported at this time. The steps for [creating the RedisEnterpriseCluster (REC)]({{<relref "operate/kubernetes/deployment/quick-start#create-a-redis-enterprise-cluster-rec">}}) and other custom resources remain the same.
-- Upgrades and migrations are not supported.
+- The steps for [creating the RedisEnterpriseCluster (REC)]({{<relref "operate/kubernetes/deployment/quick-start#create-a-redis-enterprise-cluster-rec">}}) and other custom resources remain the same.
+- Migrations are not supported.
 - The chart doesn't include configuration options for multiple namespaces, rack-awareness, and Vault integration. The steps for configuring these options remain the same.
 - The chart has had limited testing in advanced setups, including Active-Active configurations, air-gapped deployments, and IPv6/dual-stack environments.

content/operate/kubernetes/upgrade/_index.md

@@ -17,6 +17,8 @@ The upgrade process includes updating three components:
   2. Upgrade the Redis Enterprise cluster (REC)
   3. Upgrade Redis Enterprise databases (REDB)
 
+If you installed using Helm charts, see [Upgrade the chart]({{<relref "/operate/kubernetes/deployment/helm#upgrade-the-chart">}}) for Helm-specific upgrade instructions.
+
 If you are using OpenShift, see [Upgrade Redis Enterprise with OpenShift CLI]({{<relref "/operate/kubernetes/upgrade/openshift-cli">}}) or [Upgrade Redis Enterprise with OpenShift OperatorHub]({{<relref "/operate/kubernetes/upgrade/upgrade-olm">}}).
 
 For all other Kubernetes distributions, see [Upgrade Redis Enterprise for Kubernetes]({{<relref "/operate/kubernetes/upgrade/upgrade-redis-cluster" >}}).

content/operate/kubernetes/upgrade/openshift-cli.md

@@ -1,5 +1,5 @@
 ---
-Title: Upgrade Redis Enterprise with OpenShift CLI 
+Title: Upgrade Redis Enterprise with OpenShift CLI
 alwaysopen: false
 categories:
 - docs
@@ -57,6 +57,28 @@ See [Upgrade modules]({{<relref "/operate/oss_and_stack/stack-with-enterprise/in
 
 Use `kubectl get rec` and verify the `LICENSE STATE` is valid on your REC before you start the upgrade process.
 
+## Upgrade with Helm charts
+
+If you installed the Redis Enterprise operator using Helm charts on OpenShift, you can upgrade using Helm commands. This method automatically handles the operator upgrade and Custom Resource Definition (CRD) updates.
+
+To upgrade using Helm on OpenShift:
+
+```sh
+helm upgrade <release-name> redis/redis-enterprise-operator --version <chart-version> \
+    --set openshift.mode=true
+```
+
+For example:
+
+```sh
+helm upgrade my-redis-enterprise redis/redis-enterprise-operator --version 7.8.2-2 \
+    --set openshift.mode=true
+```
+
+After the Helm upgrade completes, continue with [upgrading the Redis Enterprise cluster](#upgrade-the-redis-enterprise-cluster) and [upgrading databases](#upgrade-databases).
+
+For detailed Helm upgrade instructions, see [Upgrade the chart]({{<relref "/operate/kubernetes/deployment/helm#upgrade-the-chart">}}).
+
 ## Upgrade the operator
 
 ### Download the bundle
@@ -194,7 +216,7 @@ oc rollout status sts <REC_name>
 
 ### Upgrade databases
 
-After the cluster is upgraded, you can upgrade your databases. To upgrade your REDB, specify your new database version in the `spec.redisVersion` field in the REDB custom resources. Supported database versions for operator versions include `"7.2"` and `"7.4"` (note this value is a string). 
+After the cluster is upgraded, you can upgrade your databases. To upgrade your REDB, specify your new database version in the `spec.redisVersion` field in the REDB custom resources. Supported database versions for operator versions include `"7.2"` and `"7.4"` (note this value is a string).
 
 To upgrade your REAADB, see [Upgrade an Active-Active database]({{<relref "/operate/rs/installing-upgrading/upgrading/upgrade-active-active/">}}) for details on the `rladmin` and `crdb-cli` commands required. Reach out to Redis support if you have additional questions.
 

content/operate/kubernetes/upgrade/upgrade-olm.md

@@ -57,6 +57,28 @@ See [Upgrade modules]({{<relref "/operate/oss_and_stack/stack-with-enterprise/in
 
 Use `kubectl get rec` and verify the `LICENSE STATE` is valid on your REC before you start the upgrade process.
 
+## Upgrade with Helm charts
+
+If you installed the Redis Enterprise operator using Helm charts on OpenShift, you can upgrade using Helm commands instead of the OperatorHub. This method automatically handles the operator upgrade and Custom Resource Definition (CRD) updates.
+
+To upgrade using Helm on OpenShift:
+
+```sh
+helm upgrade <release-name> redis/redis-enterprise-operator --version <chart-version> \
+    --set openshift.mode=true
+```
+
+For example:
+
+```sh
+helm upgrade my-redis-enterprise redis/redis-enterprise-operator --version 7.8.2-2 \
+    --set openshift.mode=true
+```
+
+After the Helm upgrade completes, continue with [upgrading the Redis Enterprise cluster](#upgrade-the-redis-enterprise-cluster) and [upgrading databases](#upgrade-databases).
+
+For detailed Helm upgrade instructions, see [Upgrade the chart]({{<relref "/operate/kubernetes/deployment/helm#upgrade-the-chart">}}).
+
 ## Upgrade the Redis Enterprise operator
 
 1. Select the **Redis Enterprise Operator** from the **Operators**>**Installed Operators** page.
@@ -139,7 +161,7 @@ oc rollout status sts <REC_name>
 
 ## Upgrade databases
 
-After the cluster is upgraded, you can upgrade your databases. To upgrade your REDB, specify your new database version in the `spec.redisVersion` field in the REDB custom resources. Supported database versions for operator versions include `"7.2"` and `"7.4"` (note this value is a string). 
+After the cluster is upgraded, you can upgrade your databases. To upgrade your REDB, specify your new database version in the `spec.redisVersion` field in the REDB custom resources. Supported database versions for operator versions include `"7.2"` and `"7.4"` (note this value is a string).
 
 To upgrade your REAADB, see [Upgrade an Active-Active database]({{<relref "/operate/rs/installing-upgrading/upgrading/upgrade-active-active/">}}) for details on the `rladmin` and `crdb-cli` commands required. Reach out to Redis support if you have additional questions.
 

content/operate/kubernetes/upgrade/upgrade-redis-cluster.md

@@ -57,6 +57,33 @@ See [Upgrade modules]({{<relref "/operate/oss_and_stack/stack-with-enterprise/in
 
 Use `kubectl get rec` and verify the `LICENSE STATE` is valid on your REC before you start the upgrade process.
 
+## Upgrade with Helm charts
+
+If you installed the Redis Enterprise operator using Helm charts, you can upgrade using Helm commands. This method automatically handles the operator upgrade and Custom Resource Definition (CRD) updates.
+
+To upgrade using Helm:
+
+```sh
+helm upgrade <release-name> redis/redis-enterprise-operator --version <chart-version>
+```
+
+For example:
+
+```sh
+helm upgrade my-redis-enterprise redis/redis-enterprise-operator --version 7.8.2-2
+```
+
+For OpenShift installations, include the `openshift.mode=true` parameter:
+
+```sh
+helm upgrade <release-name> redis/redis-enterprise-operator --version <chart-version> \
+    --set openshift.mode=true
+```
+
+After the Helm upgrade completes, continue with [upgrading the Redis Enterprise cluster (REC)](#upgrade-the-redis-enterprise-cluster-rec) and [upgrading databases](#upgrade-databases).
+
+For detailed Helm upgrade instructions, see [Upgrade the chart]({{<relref "/operate/kubernetes/deployment/helm#upgrade-the-chart">}}).
+
 ## Upgrade the operator
 
 ### Download the bundle
@@ -189,7 +216,7 @@ kubectl rollout status sts <REC_name>
 
 ### Upgrade databases
 
-After the cluster is upgraded, you can upgrade your databases. To upgrade your REDB, specify your new database version in the `spec.redisVersion` field in the REDB custom resources. Supported database versions for operator versions include `"7.2"` and `"7.4"` (note this value is a string). 
+After the cluster is upgraded, you can upgrade your databases. To upgrade your REDB, specify your new database version in the `spec.redisVersion` field in the REDB custom resources. Supported database versions for operator versions include `"7.2"` and `"7.4"` (note this value is a string).
 
 To upgrade your REAADB, see [Upgrade an Active-Active database]({{<relref "/operate/rs/installing-upgrading/upgrading/upgrade-active-active/">}}) for details on the `rladmin` and `crdb-cli` commands required. Reach out to Redis support if you have additional questions.