[Upgrade 9.0] Adds ECE/ECK upgrade topics

deploy-manage/upgrade/deployment-or-cluster/upgrade-on-ece.md

@@ -3,3 +3,46 @@ navigation_title: "Upgrade on {{ece}}"
 ---
 
 # Upgrade on {{ece}} (ECE)
+
+Similar to {{ech}}, a single click in the {{ecloud}} console can upgrade a deployment running on ECE to a newer version, add more processing capacity, change plugins, and enable or disable high availability, all at the same time. During the upgrade process, {{es}}, {{kib}}, and all of your deployment components are upgraded simultaneously.
+
+Once you're prepared to upgrade, do the following: 
+
+% Note: Add a link once confirmed where prepare to upgrade will reside in TOC. 
+
+1. Ensure your current ECE and Docker or Podman versions are [compatible](https://www.elastic.co/support/matrix/#elastic-cloud-enterprise) with the {{stack}} version you're upgrading to. For example, if you're upgrading to 9.0.0, the minimum required version is ECE 3.0. If you don’t have a compatible version installed, [upgrade your orchestrator](/deploy-manage/upgrade/orchestrator/upgrade-cloud-enterprise.md).  
+2. Download the most recent [stack pack](/deploy-manage/deploy/cloud-enterprise/manage-elastic-stack-versions.md#ece_most_recent_elastic_stack_packs) for the version you’re upgrading to, then [add the stack pack](/deploy-manage/deploy/cloud-enterprise/manage-elastic-stack-versions.md#ece-manage-elastic-stack-add) to your installation using the Cloud UI. 
+3. [Configure a snapshot repository](/deploy-manage/tools/snapshot-and-restore/cloud-enterprise.md) to enable snapshots and back up your data.
+
+ ## Perform the upgrade 
+
+ 1. [Log in to the Cloud UI](/deploy-manage/deploy/cloud-enterprise/log-into-cloud-ui.md). 
+ 2. On the Deployments page, select your deployment.
+
+    Narrow the list by name, ID, or choose from several other filters. To further define the list, use a combination of filters.
+
+To upgrade a deployment:
+
+1. In the **Deployment version** section, click **Upgrade**.
+2. Select the version you're upgrading to. For example, `9.0.0`.
+3. Click **Upgrad**e, then **Confirm upgrade**. The new configuration takes a few minutes to create.
+
+    ::::{note} 
+    If any incompatibilities are detected when you attempt to upgrade, the UI provides a link to the Upgrade Assistant, which checks for deprecated settings in your cluster and indices and helps you resolve them. If there are any issues that would prevent a successful upgrade, the upgrade is blocked. After resolving the issues, return to the **Deployments** page and restart the upgrade.
+    ::::
+
+Security realm settings
+:   During the upgrade process, you are prompted to update the security realm settings if your user settings include a `xpack.security.authc.realms` value.
+
+    If the security realms are configured in `user_settings`, you’ll be prompted to modify the settings:
+
+    1. On the **Update security realm settings** window, edit the settings.
+    2. Click **Update settings**. If the security realm settings are located in `user_settings_override`, contact support to help you upgrade.
+
+## Next steps [next-steps-ece]
+
+Once you've successfully upgraded on {{ece}}, do the following: 
+
+* [Upgrade Elastic APM](../../../solutions/observability/apps/upgrade.md)
+* [Upgrade your ingest components](/deploy-manage/upgrade/ingest-components.md) 
+

deploy-manage/upgrade/deployment-or-cluster/upgrade-on-eck.md

@@ -3,3 +3,138 @@ navigation_title: "Upgrade on {{eck}}"
 ---
 
 # Upgrade on {{eck}} (ECK)
+
+The ECK orchestrator can safely perform upgrades to newer versions of the {{stack}}. 
+
+Once you are prepared to upgrade, ensure the ECK version is [compatible](https://www.elastic.co/guide/en/cloud-on-k8s/current/k8s-supported.html) with the {{stack}} version you’re upgrading to. If it's incompatible, [upgrade your orchestrator](/deploy-manage/upgrade/orchestrator/upgrade-cloud-on-k8s.md). 
+
+% Note: Add a link once confirmed where prepare to upgrade will reside in TOC. 
+
+## Perform the upgrade 
+
+1. In the resource spec file, modify the `version` field for the desired {{stack}} version. 
+2. Save your changes. The orchestrator will start the upgrade process automatically. 
+
+In this example, we’re modifying the version to `9.0.0`. 
+
+```yaml
+apiVersion: elasticsearch.k8s.elastic.co/v1
+kind: Elasticsearch
+metadata:
+  name: elasticsearch-sample
+  namespace: production
+spec:
+  version: 9.0.0
+  monitoring:
+    metrics:
+      elasticsearchRefs:
+        - name: monitoring-cluster
+          namespace: observability
+    logs:
+      elasticsearchRefs:
+        - name: monitoring-cluster
+          namespace: observability
+  http:
+    service:
+      spec:
+        type: LoadBalancer
+  nodeSets:
+  - name: master
+    count: 3
+    config:
+      node.roles: ["master"]
+      xpack.ml.enabled: true
+      node.store.allow_mmap: false
+    volumeClaimTemplates:
+    - metadata:
+        name: elasticsearch-data
+      spec:
+        accessModes:
+        - ReadWriteOnce
+        resources:
+          requests:
+            storage: 20Gi
+        storageClassName: standard
+    podTemplate:
+      metadata:
+        labels:
+          key: sample
+      spec:
+        initContainers:
+        - name: sysctl
+          securityContext:
+            privileged: true
+          command: ['sh', '-c', 'sysctl -w vm.max_map_count=262144']
+        containers:
+        - name: elasticsearch
+          resources:
+            requests:
+              memory: 2Gi
+              cpu: 0.5
+            limits:
+              memory: 2Gi
+              cpu: 1
+  - name: data
+    count: 3
+    config:
+      node.roles: ["data", "ingest", "ml", "transform"]
+      node.store.allow_mmap: false
+    volumeClaimTemplates:
+    - metadata:
+        name: elasticsearch-data
+      spec:
+        accessModes:
+        - ReadWriteOnce
+        resources:
+          requests:
+            storage: 20Gi
+        storageClassName: standard
+    podTemplate:
+      metadata:
+        labels:
+          key: sample
+      spec:
+        initContainers:
+        - name: sysctl
+          securityContext:
+            privileged: true
+          command: ['sh', '-c', 'sysctl -w vm.max_map_count=262144']
+        containers:
+        - name: elasticsearch
+          resources:
+            requests:
+              memory: 2Gi
+              cpu: 0.5
+            limits:
+              memory: 2Gi
+              cpu: 1
+---
+apiVersion: kibana.k8s.elastic.co/v1
+kind: Kibana
+metadata:
+  name: kibana-sample
+  namespace: production
+spec:
+  version: 9.0.0
+  monitoring:
+    metrics:
+      elasticsearchRefs:
+        - name: monitoring-cluster
+          namespace: observability
+    logs:
+      elasticsearchRefs:
+        - name: monitoring-cluster
+          namespace: observability
+  http:
+    service:
+      spec:
+        type: LoadBalancer
+  count: 1
+  elasticsearchRef:
+    name: elasticsearch-sample
+```
+
+ECK will ensure that {{stack}} components are upgraded in the correct order. Upgrades to dependent resources are delayed until that dependency is upgraded. For example, the {{kib}} upgrade will start only when the associated {{es}} cluster has been upgraded.
+
+Check out [Nodes orchestration](/deploy-manage/deploy/cloud-on-k8s/nodes-orchestration.md) for more information on how ECK manages upgrades and how to tune its behavior.
+