[Observability] Add serverless feature tiers page (#2297)

This PR closes #2300 and #2301 adding details about the new Logs
Essentials subscription tier in Observability Serverless.

Author: mdbirnstiehl

deploy-manage/cloud-organization/billing/elastic-observability-billing-dimensions.md

@@ -10,7 +10,10 @@ products:
 
 # Elastic for Observability billing dimensions [observability-billing]
 
-{{obs-serverless}} projects provide you with all the capabilities of Elastic Observability to monitor critical applications. Projects are provided using a Software as a Service (SaaS) model, and pricing is entirely consumption-based.
+{{obs-serverless}} projects provide you with all the capabilities of Elastic Observability to monitor critical applications. Projects are provided using a Software as a Service (SaaS) model, and pricing is entirely consumption-based. {{obs-serverless}} projects are available in the following tiers of carefully selected features to enable common observability operations:
+
+* **Observability Logs Essentials**: Includes everything you need to store and analyze logs at scale.
+* **Observability Complete**: Adds full-stack observability capabilities to monitor cloud-native and hybrid environments.
 
 Your monthly bill is based on the capabilities you use. When you use {{obs-serverless}}, your bill is calculated based on data volume, which has these components:
 
@@ -19,9 +22,12 @@ Your monthly bill is based on the capabilities you use. When you use {{obs-serve
 
 Data volumes for ingest and retention are based on the fully enriched normalized data size at the end of the ingest pipeline, before {{es}} compression is performed, and will be higher than the volumes traditionally reported by {{es}} index size. In addition, these volumes might be larger than those reported by cloud provider proxy logs for data going into {{es}}. This allows you to have flexibility in choosing your preferred ingest architecture for enrichment, whether it’s through Elastic Agent, Logstash, OpenTelemetry, or collectors — with no impact on the cost.
 
+Refer to [Serverless billing dimensions](serverless-project-billing-dimensions.md) and the [{{ecloud}} pricing table](https://cloud.elastic.co/cloud-pricing-table?productType=serverless&project=observability) for more details about {{obs-serverless}} billing dimensions and rates.
 
 ## Synthetics [synthetics-billing]
 
-[Synthetic monitoring](/solutions/observability/synthetics/index.md) is an optional add-on to Observability Serverless projects that allows you to periodically check the status of your services and applications. In addition to the core ingest and retention dimensions, there is a charge to execute synthetic monitors on our testing infrastructure. Browser (journey) based tests are charged per-test-run, and ping (lightweight) tests have an all-you-can-use model per location used.
+[Synthetic monitoring](/solutions/observability/synthetics/index.md) is an optional add-on to Observability Serverless projects that allows you to periodically check the status of your services and applications as a part of your "Complete" tier subscription. In addition to the core ingest and retention dimensions, there is a charge to execute synthetic monitors on our testing infrastructure. Browser (journey) based tests are charged per-test-run, and ping (lightweight) tests have an all-you-can-use model per location used.
 
-Refer to [Serverless billing dimensions](serverless-project-billing-dimensions.md) and the [{{ecloud}} pricing table](https://cloud.elastic.co/cloud-pricing-table?productType=serverless&project=observability) for more details about {{obs-serverless}} billing dimensions and rates.
+## Elastic Managed LLM
+
+The default [Elastic Managed LLM](kibana://reference/connectors-kibana/elastic-managed-llm.md) enables you to leverage AI-powered search as a service without deploying a model in your serverless project. It's configured by default to use with the Security AI Assistant, Attack Discovery, and other applicable AI features as a part of your "Complete" tier subscription. Using the default LLM will use tokens and incur related token-based add-on billing for your serverless project.

deploy-manage/deploy/elastic-cloud/differences-from-other-elasticsearch-offerings.md

@@ -102,9 +102,9 @@ This table compares Elasticsearch capabilities between {{ech}} deployments and S
 
 ### Observability
 
-This table compares Observability capabilities between {{ech}} deployments and Serverless projects:
+This table compares Observability capabilities between {{ech}} deployments and Observability Complete Serverless projects. For more information on Observability Logs Essentials Serverless projects, refer to [Observability subscription tiers](../../../solutions/observability/observability-serverless-feature-tiers.md).
 
-| **Feature** | {{ech}} | Serverless Observability projects | Serverless notes |
+| **Feature** | {{ech}} | Serverless Observability Complete projects | Serverless notes |
 |---------|----------------------|-----------------------------------|------------------|
 | [**AI Assistant**](/solutions/observability/observability-ai-assistant.md) | ✅ | ✅ | |
 | **APM integration** | ✅ | ✅ | Use **Managed Intake Service** (supports Elastic APM and OTLP protocols) |

deploy-manage/deploy/elastic-cloud/project-settings.md

@@ -55,7 +55,9 @@ $$$elasticsearch-manage-project-search-power-settings$$$
 ```yaml {applies_to}
 serverless:
   security:
+  observability:
 ```
+### {{elastic-sec}} project features
 
 For {{elastic-sec}} projects, edit the **Project features** to select a feature tier and enable add-on options for specific use cases.
 
@@ -64,7 +66,7 @@ For {{elastic-sec}} projects, edit the **Project features** to select a feature
 | **Security Analytics Essentials** | Standard security analytics, detections, investigations, and collaborations. Allows these add-ons:<br><br>* **Endpoint Protection Essentials**: endpoint protections with {{elastic-defend}}.<br>* **Cloud Protection Essentials**: Cloud native security features.<br> |
 | **Security Analytics Complete** | Everything in **Security Analytics Essentials** plus advanced features such as entity analytics, threat intelligence, and more. Allows these add-ons:<br><br>* **Endpoint Protection Complete**: Everything in **Endpoint Protection Essentials** plus advanced endpoint detection and response features.<br>* **Cloud Protection Complete**: Everything in **Cloud Protection Essentials** plus advanced cloud security features.<br> |
 
-### Downgrading the feature tier [elasticsearch-manage-project-downgrading-the-feature-tier]
+#### Downgrading the feature tier [elasticsearch-manage-project-downgrading-the-feature-tier]
 
 When you downgrade your Security project features selection from **Security Analytics Complete** to **Security Analytics Essentials**, the following features become unavailable:
 
@@ -89,3 +91,14 @@ And, the following data may be permanently deleted:
 * Entity Analytics asset criticality information
 * Detection rule external connector settings
 * Detection rule response action settings
+
+### {{obs-serverless}} project features
+
+For {{obs-serverless}} projects, edit the **Project features** to select a feature tier.
+
+| Feature tier | Description|
+| :--- | :--- |
+| **Observability Logs Essentials** | Includes everything you need to store and analyze logs at scale.<br> |
+| **Observability Complete** | Adds full-stack observability capabilities to monitor cloud-native and hybrid environments.<br> |
+
+For a full feature comparison, upgrading instructions, and more, refer to [{{obs-serverless}} feature tiers](../../../solutions/observability/observability-serverless-feature-tiers.md).

solutions/observability/observability-serverless-feature-tiers.md

@@ -0,0 +1,57 @@
+---
+navigation_title: Serverless feature tiers
+applies_to:
+  serverless: ga
+products:
+  - id: observability
+---
+
+# {{obs-serverless}} feature tiers
+
+{{obs-serverless}} projects are available in the following tiers, each with a carefully selected set of features to enable common observability operations:
+
+* **Observability Logs Essentials**: Includes everything you need to store and analyze logs at scale.
+* **Observability Complete**: Adds full-stack observability capabilities to monitor cloud-native and hybrid environments.
+
+Refer to the [feature comparison table](#obs-subscription-features) for a more detailed comparison between the tiers.
+
+## Subscription tier pricing [obs-subscription-pricing]
+
+For pricing information, refer to [Elastic Observability Serverless pricing](https://www.elastic.co/pricing/serverless-observability).
+
+## Feature comparison [obs-subscription-features]
+
+The following table compares features available in Observability Complete and Observability Logs Essentials:
+
+| **Feature** | Observability Complete | Observability Logs Essentials |
+|---------|----------------------|-----------------------------------|
+| **[Ad-hoc analytics](/explore-analyze/discover.md)** | ✅ | ✅ |
+| **[Out-of-the-box dashboards](/explore-analyze/dashboards.md)** | ✅ | ✅ |
+| **[Custom dashboards](/explore-analyze/dashboards.md)** | ✅ | ✅ |
+| **[Alerting and notifications](/deploy-manage/monitor/monitoring-data/configure-stack-monitoring-alerts.md)** | ✅ | ✅ |
+| **[Integrations](https://www.elastic.co/integrations/data-integrations?solution=observability)** | ✅ | ✅ |
+| **[Machine learning](/explore-analyze/machine-learning.md)** | ✅ | ❌ |
+| **[Rate and pattern analysis](/explore-analyze/machine-learning/machine-learning-in-kibana/xpack-ml-aiops.md)** | ✅ | ❌ |
+| **[Service level objectives (SLO)](/solutions/observability/incident-management/service-level-objectives-slos.md)** | ✅ | ❌ |
+| **[Infrastructure and hosts](/solutions/observability/infra-and-hosts.md)** | ✅ | ❌ |
+| **[APM](/solutions/observability/apm/index.md)** | ✅ | ❌ |
+| **[AI Assistant](/solutions/observability/observability-ai-assistant.md)** including Elastic Managed LLM | ✅ | ❌ |
+| **[Custom knowledge bases](/solutions/observability/observability-ai-assistant.md#obs-ai-kb-ui)** | ✅ | ❌ |
+| **[Synthetics testing and browser experience monitoring](/solutions/observability/synthetics/index.md)** | ✅ | ❌ |
+
+## Ingest data into a Logs Essentials project [obs-subscription-ingest]
+
+From the main navigation menu, select **Add data**. Select which logs you want to monitor and how you want to monitor them, then follow the instructions for your system.
+
+## Upgrade from Observability Logs Essentials to Observability Complete [obs-subscription-upgrade]
+
+:::{warning}
+Upgrading from Observability Logs Essentials to Observability Complete is permanent and is not reversible.
+:::
+
+To access the additional features available in Observability Complete, upgrade your Observability Logs Essentials subscription by completing the following steps:
+
+1. From the [{{ecloud}} Console](https://cloud.elastic.co), select **Manage** next to the Observability Logs Essentials serverless project you want to upgrade.
+1. Next to **Project features**, select **Edit**.
+1. Select **Observability Complete**.
+1. Select **Save** to complete the upgrade.

solutions/toc.yml

@@ -459,6 +459,7 @@ toc:
               - file: observability/incident-management/create-an-slo.md
       - file: observability/data-set-quality-monitoring.md
       - file: observability/observability-ai-assistant.md
+      - file: observability/observability-serverless-feature-tiers.md
   - file: security.md
     children:
       - file: security/elastic-security-serverless.md