docs(valkey): sync failover hardening options

src/data/playground-configs.ts

@@ -1661,6 +1661,42 @@ export const chartConfigs: Record<string, ChartConfig> = {
           default: '3',
           description: 'Sentinel pod count',
         },
+        {
+          label: 'Sentinel Pod Policy',
+          key: 'sentinel.podManagementPolicy',
+          type: 'select',
+          default: '',
+          options: ['', 'OrderedReady', 'Parallel'],
+          description: 'StatefulSet pod startup policy',
+        },
+        {
+          label: 'Graceful Failover',
+          key: 'sentinel.gracefulFailover.enabled',
+          type: 'toggle',
+          default: 'true',
+          description: 'Fail over before master shutdown',
+        },
+        {
+          label: 'Graceful Attempts',
+          key: 'sentinel.gracefulFailover.maxAttempts',
+          type: 'number',
+          default: '12',
+          description: 'preStop failover attempts',
+        },
+        {
+          label: 'Startup Guard',
+          key: 'sentinel.startupFailoverGuard.enabled',
+          type: 'toggle',
+          default: 'true',
+          description: 'Prevent empty master resume',
+        },
+        {
+          label: 'Startup Attempts',
+          key: 'sentinel.startupFailoverGuard.maxAttempts',
+          type: 'number',
+          default: '20',
+          description: 'Startup failover attempts',
+        },
         {
           label: 'Cluster Nodes',
           key: 'cluster.nodes',

src/pages/docs/charts/valkey.mdx

@@ -154,6 +154,12 @@ pdb:
 Keep at least three Sentinels and choose a quorum that matches the failure domains. Validate application reconnect
 behavior before production rollout.
 
+The chart enables Sentinel failover hardening by default. `sentinel.gracefulFailover.enabled` triggers a bounded
+preStop failover when the active master is voluntarily terminated, and `sentinel.startupFailoverGuard.enabled` prevents
+a fresh data directory from resuming as an empty master while peers still hold data. Keep
+`sentinel.podManagementPolicy` empty for upgrade compatibility on existing StatefulSets; use `Parallel` only for new
+installs where immutable StatefulSet fields are acceptable.
+
 ## Cluster
 
 Cluster mode is for native sharding and requires Valkey Cluster-compatible clients:
@@ -292,6 +298,11 @@ client understands Sentinel discovery or Cluster redirects.
 | `standalone.persistence.enabled`            | `true`                    | Persist standalone data.                                         |
 | `replication.replicaCount`                  | `2`                       | Replica count for replication modes.                             |
 | `sentinel.replicaCount`                     | `3`                       | Number of Sentinel pods.                                         |
+| `sentinel.podManagementPolicy`              | `""`                      | Optional Sentinel StatefulSet pod management policy.             |
+| `sentinel.gracefulFailover.enabled`         | `true`                    | Trigger preStop failover when the active master shuts down.      |
+| `sentinel.gracefulFailover.maxAttempts`     | `12`                      | Failover confirmation attempts during graceful shutdown.         |
+| `sentinel.startupFailoverGuard.enabled`     | `true`                    | Prevent fresh pods from resuming as empty masters.               |
+| `sentinel.startupFailoverGuard.maxAttempts` | `20`                      | Failover confirmation attempts during startup guard handling.    |
 | `cluster.nodes`                             | `6`                       | Total cluster pods.                                              |
 | `cluster.initJob.securityContext.runAsUser` | `999`                     | Cluster bootstrap Job container user ID.                         |
 | `service.type`                              | `ClusterIP`               | Client Service type where applicable.                            |

src/pages/playground.astro

@@ -28,6 +28,7 @@ const siteSyncPlaygroundConfigs: Record<string, string> = {
   memcached: 'src/data/playground-configs.ts',
   notediscovery: 'src/data/playground-configs.ts',
   poznote: 'src/data/playground-configs.ts',
+  valkey: 'src/data/playground-configs.ts',
 };
 const configuredChartSlugs = new Set([...Object.keys(mergedConfigs), ...Object.keys(siteSyncPlaygroundConfigs)]);
 const playgroundCharts = charts.filter(