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+///////////////////////////////////////////////////////////////////////////////
+
+    Copyright (c) 2023 Oracle and/or its affiliates.
+
+    Licensed under the Apache License, Version 2.0 (the "License");
+    you may not use this file except in compliance with the License.
+    You may obtain a copy of the License at
+
+        http://www.apache.org/licenses/LICENSE-2.0
+
+    Unless required by applicable law or agreed to in writing, software
+    distributed under the License is distributed on an "AS IS" BASIS,
+    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+    See the License for the specific language governing permissions and
+    limitations under the License.
+
+///////////////////////////////////////////////////////////////////////////////
+
+= Tracing
+:description: Helidon SE Observability
+:feature-name: Helidon Observability
+:keywords: helidon, observability
+:rootdir: {docdir}/..
+
+include::{rootdir}/includes/se.adoc[]
+
+== Contents
+
+- <<Overview, Overview>>
+- <<Maven Coordinates, Maven Coordinates>>
+- <<Usage, Usage>>
+- <<Configuration, Configuration>>
+- <<Additional Information, Additional Information>>
+- <<Reference, Reference>>
+
+== Overview
+
+In Helidon 4 all observability features were moved to one logical module: `observe`. The observability support groups all observe endpoints together under a single context root (the default behavior) `/observe`.
+
+include::{rootdir}/includes/dependencies.adoc[]
+
+// tag::observe-dependency[]
+[source,xml]
+----
+<dependency>
+    <groupId>io.helidon.webserver.observe</groupId>
+    <artifactId>helidon-webserver-observe</artifactId>
+</dependency>
+----
+// end::observe-dependency[]
+
+For Health Observability features:
+
+// tag::observe-health-dependency[]
+[source,xml]
+----
+<dependency>
+    <groupId>io.helidon.webserver.observe</groupId>
+    <artifactId>helidon-webserver-observe-health</artifactId>
+</dependency>
+----
+// end::observe-health-dependency[]
+
+For Metrics Observability features:
+
+// tag::observe-metrics-dependency[]
+[source,xml]
+----
+<dependency>
+    <groupId>io.helidon.webserver.observe</groupId>
+    <artifactId>helidon-webserver-observe-metrics</artifactId>
+</dependency>
+----
+// end::observe-metrics-dependency[]
+
+For Info Observability features:
+
+// tag::observe-info-dependency[]
+[source,xml]
+----
+<dependency>
+    <groupId>io.helidon.webserver.observe</groupId>
+    <artifactId>helidon-webserver-observe-info</artifactId>
+</dependency>
+----
+// end::observe-info-dependency[]
+
+For Logging Observability features:
+
+// tag::observe-log-dependency[]
+[source,xml]
+----
+<dependency>
+    <groupId>io.helidon.webserver.observe</groupId>
+    <artifactId>helidon-webserver-observe-log</artifactId>
+</dependency>
+----
+// end::observe-log-dependency[]
+
+
+== Usage
+
+Each provider usually adds a new endpoint (such as `health`, `metrics`).
+This is to have a single easily configurable path for security, proxy etc. purposes, rather than expose multiple "root" endpoints that may collide with the business code.
+
+=== Discovery
+
+`ObserveProvider` instances are discovered using `ServiceLoader`. In case an explicit `Observer` is registered with the
+same `type` as a provider, the provider will not be used (so we do not duplicate services).
+
+=== Endpoints
+
+The "Observe" service endpoint can be modified on the `ObserveFeature` that is registered with routing. The feature endpoint defaults to `/observe`, and all observers are prefixed with it (see further)
+
+Each observer has customizable endpoints as well, and the result is decided as follows:
+1. If the custom endpoint is relative, the result would be under observe endpoint (e.g. for `health` -> `/observe/health`)
+2. If the custom endpoint is absolute, the result would be absolute as well (e.g. for `/health` -> `/health`)
+
+==== Configuration Observability
+
+Configuration observability allows reading the current application configuration values.
+Configuration observability defines the following endpoints:
+
+|===
+|Endpoint |Method |Action
+
+|`/config/profile`
+|`GET`
+|Returns the current configuration profile
+
+|`/config/values`
+|`GET`
+|Returns the current configuration values
+
+|`/config/values/{name}`
+|`GET`
+|Returns specified by `name` configuration value
+|===
+
+NOTE: All secrets and passwords are obfuscated with "*" characters.
+
+==== Health Observability
+
+Health observability allows reading application readiness to serve requests, whether the services are alive.
+Health observability defines the following endpoints:
+
+|===
+|Endpoint |Method |Action
+
+|`/health/ready`
+|`GET`
+|Returns Service Readiness
+
+|`/health/live`
+|`GET`
+|Returns whether the service is alive
+
+|`/health/started`
+|`GET`
+|Returns whether the service is started
+
+|`/health/ready/{name}`
+|`GET`
+|Returns Service `name` Readiness
+
+|`/health/live/{name}`
+|`GET`
+|Returns whether the service `name` is alive
+
+|`/health/started/{name}`
+|`GET`
+|Returns whether the service `name` is started
+
+|`/health/check/{name}`
+|`GET`
+|Returns all checks for service `name`
+
+|`/health/ready`
+|`HEAD`
+|Returns Service Readiness without details
+
+|`/health/live`
+|`HEAD`
+|Returns whether the service is alive without details
+
+|`/health/started`
+|`HEAD`
+|Returns whether the service is started without details
+
+|`/health/ready/{name}`
+|`HEAD`
+|Returns Service `name` Readiness without details
+
+|`/health/live/{name}`
+|`HEAD`
+|Returns whether the service `name` is alive without details
+
+|`/health/started/{name}`
+|`HEAD`
+|Returns whether the service `name` is started without details
+
+|`/health/check/{name}`
+|`HEAD`
+|Returns all checks for service `name` without details
+
+|===
+
+For more information, please, check xref:{rootdir}/se/health.adoc[Health] documentation.
+
+
+==== Information Observability
+
+Info observability allows configuration of custom properties to be available to users.
+Information observability defines the following endpoints:
+
+|===
+|Endpoint |Method |Action
+
+|`/info`
+|`GET`
+|Returns the Application information
+
+|`/info/{name}`
+|`GET`
+|Returns the Application information for the specified `name`
+
+|===
+
+
+==== Logger Observability
+
+Log observability allows reading and configuring of log levels of various loggers and reading log messages.
+Logger Observability defines the following endpoints:
+
+|===
+|Endpoint |Method |Action
+
+|`/log`
+|`GET`
+|Stream logs (if enabled)
+
+|`/log/loggers`
+|`GET`
+|Returns all logger handlers
+
+|`/log/log/loggers/{logger}`
+|`GET`
+|Returns the Logger by name `logger`
+
+|`/log/loggers/{logger}`
+|`POST`
+|Set Logger level by name `logger`
+
+|`/log/loggers/{logger}`
+|`DELETE`
+|Unset the specified logger `logger`
+
+|===
+
+==== Metrics Observability
+
+Helidon distinguishes among three general _types_, or scopes, of metrics.
+
+.Types (scopes) of metrics
+[%autowidth]
+|====
+| Type/scope | Typical Usage
+
+| base | OS or Java runtime measurements (available heap, disk space, etc.).
+| vendor | Implemented by vendors, including the `REST.request` metrics and other key performance indicator measurements.
+| application | Declared via annotations or programmatically registered by your service code.
+|====
+
+When you add the metrics dependency to your project, Helidon automatically provides a built-in REST endpoint `/observe/metrics` which responds with a report of the registered metrics and their values.
+
+Clients can request a particular output format.
+
+.Formats for `/observe/metrics` output
+[%autowidth]
+|====
+| Format | Requested by
+
+| OpenMetrics (Prometheus) | default (`text/plain`)
+| JSON | Header `Accept: application/json`
+|====
+
+Clients can also limit the report by appending the metric type to the path:
+
+* `/observe/metrics/base`
+* `/observe/metrics/vendor`
+* `/observe/metrics/application`
+
+For more information see xref:{rootdir}/se/metrics/metrics.adoc[Metrics] documentation.
+
+== Configuration
+
+To customize the endpoint of an observer:
+
+1. Configure a custom endpoint through configuration to modify the `ObserveProvider` setup (such as `observe.health.endpoint`)
+2. Configure a custom endpoint through a builder on the specific `Observer` (`HealthObserver.builder().endpoint("myhealth")`)
+
+
+== Additional Information
+
+The Observability features are now implemented with `HttpFeature` and can be registered with `HttpRouting.Builder#addFeature(java.util.function.Supplier)`. Such a feature encapsulates a set of endpoints, services and/or filters.
+
+Feature is similar to `HttpService` but gives more freedom in setup.
+Main difference is that a feature can add `Filter` filters and it cannot be  registered on a path (that is left to the discretion of the feature developer).
+
+* Features are not registered immediately - each feature can define a `Weight` or implement `Weighted` to order features according to their weight. Higher weighted features are registered first.
+* This is to allow ordering of features in a meaningful way (e.g. Context should be first, Tracing second, Security third etc.).
+
+
+== Reference
+
+* https://download.eclipse.org/microprofile/microprofile-metrics-5.0.0/microprofile-metrics-spec-5.0.0.pdf[MicroProfile Metrics Specification]
+* xref:{rootdir}/se/metrics/metrics.adoc[Metrics] documentation.
+* xref:{rootdir}/se/health.adoc[Health] documentation.
\ No newline at end of file
diff --git a/docs/sitegen.yaml b/docs/sitegen.yaml
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--- a/docs/sitegen.yaml
+++ b/docs/sitegen.yaml
@@ -414,6 +414,12 @@ backend:
                   - "openapi.adoc"
                   - "openapi-generator.adoc"
                   - "openapi-ui.adoc"
+              - type: "PAGE"
+                title: "Observability"
+                source: "observability.adoc"
+                glyph:
+                  type: "icon"
+                  value: "search"
               - type: "PAGE"
                 title: "Reactive Messaging"
                 source: "reactive-messaging.adoc"