DOC-1621 Shadowing in Cloud (#462)

* DOC-1621 Shadowing in Cloud

* add rpk shadow commands

* add rpk pages to nav & fix new index pages

* add to Dec What's New

# Conflicts:
#	modules/get-started/pages/whats-new-cloud.adoc

* supported on BYOC/Dedicated only

* change Configure Failover to Failover

* revert playbook

Author: micheleRP

modules/ROOT/nav.adoc

@@ -417,6 +417,11 @@
 *** xref:develop:managed-connectors/create-snowflake-connector.adoc[Snowflake Sink Connector]
 
 * xref:manage:index.adoc[Manage]
+** xref:manage:rpk/index.adoc[Redpanda CLI]
+*** xref:manage:rpk/intro-to-rpk.adoc[]
+*** xref:manage:rpk/rpk-install.adoc[]
+*** xref:manage:rpk/broker-admin.adoc[]
+*** xref:manage:rpk/config-rpk-profile.adoc[]
 ** xref:manage:cluster-maintenance/index.adoc[Cluster Maintenance]
 *** xref:manage:cluster-maintenance/cluster-state.adoc[]
 *** xref:manage:maintenance.adoc[]
@@ -425,13 +430,7 @@
 **** xref:manage:audit-logging/audit-log-samples.adoc[]
 *** xref:manage:cluster-maintenance/manage-throughput.adoc[]
 *** xref:manage:cluster-maintenance/configure-availability.adoc[]
-** xref:manage:monitor-cloud.adoc[]
 ** xref:manage:mountable-topics.adoc[]
-** xref:manage:rpk/index.adoc[Redpanda CLI]
-*** xref:manage:rpk/intro-to-rpk.adoc[]
-*** xref:manage:rpk/rpk-install.adoc[]
-*** xref:manage:rpk/broker-admin.adoc[]
-*** xref:manage:rpk/config-rpk-profile.adoc[]
 ** xref:manage:iceberg/index.adoc[Iceberg]
 *** xref:manage:iceberg/about-iceberg-topics.adoc[]
 *** xref:manage:iceberg/specify-iceberg-schema.adoc[]
@@ -449,6 +448,13 @@
 *** xref:manage:schema-reg/record-deserialization.adoc[Deserialization]
 *** xref:manage:schema-reg/programmable-push-filters.adoc[Programmable Push Filters]
 *** xref:manage:schema-reg/edit-topic-configuration.adoc[Edit Topic Configuration]
+** xref:manage:disaster-recovery/index.adoc[Disaster Recovery]
+*** xref:manage:disaster-recovery/shadowing/index.adoc[Shadowing]
+**** xref:manage:disaster-recovery/shadowing/overview.adoc[Overview]
+**** xref:manage:disaster-recovery/shadowing/setup.adoc[Configure Shadowing]
+**** xref:manage:disaster-recovery/shadowing/monitor.adoc[Monitor Shadowing]
+**** xref:manage:disaster-recovery/shadowing/failover.adoc[Failover]
+**** xref:manage:disaster-recovery/shadowing/failover-runbook.adoc[Failover Runbook]
 ** xref:manage:api/index.adoc[Cloud API]
 *** link:/api/doc/cloud-controlplane/topic/topic-quickstart[Cloud API Quickstart]
 *** link:/api/doc/cloud-controlplane/topic/topic-cloud-api-overview[Cloud API Overview]
@@ -461,6 +467,7 @@
 *** link:/api/doc/cloud-controlplane/topic/topic-error-and-status-codes[Cloud API Errors and Status Codes]
 *** link:/api/doc/cloud-controlplane/topic/topic-deprecation-policy[Cloud API Deprecation Policy]
 ** xref:manage:terraform-provider.adoc[]
+** xref:manage:monitor-cloud.adoc[]
 
 * xref:billing:index.adoc[Billing]
 ** xref:billing:billing.adoc[]
@@ -598,6 +605,15 @@
 ***** xref:reference:rpk/rpk-security/rpk-security-user-delete.adoc[]
 ***** xref:reference:rpk/rpk-security/rpk-security-user-update.adoc[]
 ***** xref:reference:rpk/rpk-security/rpk-security-user-list.adoc[]
+*** xref:reference:rpk/rpk-shadow/rpk-shadow.adoc[]
+**** xref:reference:rpk/rpk-shadow/rpk-shadow-config-generate.adoc[]
+**** xref:reference:rpk/rpk-shadow/rpk-shadow-create.adoc[]
+**** xref:reference:rpk/rpk-shadow/rpk-shadow-delete.adoc[]
+**** xref:reference:rpk/rpk-shadow/rpk-shadow-describe.adoc[]
+**** xref:reference:rpk/rpk-shadow/rpk-shadow-failover.adoc[]
+**** xref:reference:rpk/rpk-shadow/rpk-shadow-list.adoc[]
+**** xref:reference:rpk/rpk-shadow/rpk-shadow-status.adoc[]
+**** xref:reference:rpk/rpk-shadow/rpk-shadow-update.adoc[]
 *** xref:reference:rpk/rpk-topic/rpk-topic.adoc[]
 **** xref:reference:rpk/rpk-topic/rpk-topic-add-partitions.adoc[]
 **** xref:reference:rpk/rpk-topic/rpk-topic-alter-config.adoc[]

modules/get-started/pages/whats-new-cloud.adoc

@@ -8,6 +8,12 @@ This page lists new features added to Redpanda Cloud.
 
 == December 2025
 
+=== Shadowing
+
+Redpanda Cloud now supports xref:manage:disaster-recovery/shadowing/overview.adoc[Shadowing], a disaster recovery solution that provides asynchronous, offset-preserving replication between distinct Redpanda clusters. Shadowing enables cross-region data protection by replicating topic data, configurations, consumer group offsets, ACLs, and Schema Registry data with byte-level fidelity.The shadow cluster operates in read-only mode while continuously receiving updates from the source cluster. During a disaster, you can failover individual topics or an entire shadow link to make resources fully writable for production traffic.
+
+Shadowing is supported on BYOC and Dedicated clusters running Redpanda version 25.3 and later. 
+
 === Metrics for Serverless
 
 You can now view and export metrics from Serverless clusters to third-party monitoring systems like Prometheus and Grafana. See xref:manage:monitor-cloud.adoc[Monitor Redpanda Cloud] for details on configuring monitoring for your Serverless cluster and xref:reference:public-metrics-reference.adoc[Metrics Reference] for a list of metrics available in Serverless.

modules/manage/pages/disaster-recovery/index.adoc

@@ -0,0 +1,8 @@
+= Disaster Recovery
+:description: Learn about disaster recovery options for Redpanda Cloud.
+:page-layout: index
+
+
+Shadowing complements Redpanda's existing availability and recovery capabilities. High availability actively protects your day-to-day operations, handling reads and writes seamlessly during node or availability zone failures within a region. Shadowing is your safety net for catastrophic regional disasters. Shadowing delivers near real-time, cross-region replication for mission-critical applications that require rapid failover with minimal data loss.
+
+NOTE: Shadowing is supported on BYOC and Dedicated clusters running Redpanda version 25.3 and later. 

modules/manage/pages/disaster-recovery/shadowing/failover-runbook.adoc

@@ -0,0 +1,4 @@
+= Failover Runbook
+:description: Step-by-step runbook for failover procedures in disaster recovery.
+
+include::ROOT:manage:disaster-recovery/shadowing/failover-runbook.adoc[tag=single-source]

modules/manage/pages/disaster-recovery/shadowing/failover.adoc

@@ -0,0 +1,4 @@
+= Configure Failover
+:description: Learn how to configure failover for disaster recovery.
+
+include::ROOT:manage:disaster-recovery/shadowing/failover.adoc[tag=single-source]

modules/manage/pages/disaster-recovery/shadowing/index.adoc

@@ -0,0 +1,5 @@
+= Shadowing
+:description: Learn about shadowing for disaster recovery in Redpanda Cloud.
+:page-layout: index
+
+NOTE: Shadowing is supported on BYOC and Dedicated clusters running Redpanda version 25.3 and later. 

modules/manage/pages/disaster-recovery/shadowing/monitor.adoc

@@ -0,0 +1,4 @@
+= Monitor Shadowing
+:description: Learn how to monitor shadowing for disaster recovery.
+
+include::ROOT:manage:disaster-recovery/shadowing/monitor.adoc[tag=single-source]

modules/manage/pages/disaster-recovery/shadowing/overview.adoc

@@ -0,0 +1,4 @@
+= Shadowing Overview
+:description: Overview of shadowing for disaster recovery in Redpanda Cloud.
+
+include::ROOT:manage:disaster-recovery/shadowing/overview.adoc[tag=single-source]

modules/manage/pages/disaster-recovery/shadowing/setup.adoc

@@ -0,0 +1,4 @@
+= Configure Shadowing
+:description: Learn how to configure shadowing for disaster recovery.
+
+include::ROOT:manage:disaster-recovery/shadowing/setup.adoc[tag=single-source]

modules/reference/pages/rpk/rpk-shadow/rpk-shadow-config-generate.adoc

@@ -0,0 +1,3 @@
+= rpk shadow config generate
+
+include::ROOT:reference:rpk/rpk-shadow/rpk-shadow-config-generate.adoc[tag=single-source]