Update the metrics analytics documentation (opensearch-project#7352)

* update the metrics analytics documentation Signed-off-by: YANGDB <yang.db.dev@gmail.com> * update the metrics analytics documentation with remote data-sources Signed-off-by: YANGDB <yang.db.dev@gmail.com> * Update metricsanalytics.md Signed-off-by: Melissa Vagi <vagimeli@amazon.com> Signed-off-by: Melissa Vagi <vagimeli@amazon.com> * Update metricsanalytics.md Signed-off-by: Melissa Vagi <vagimeli@amazon.com> Signed-off-by: Melissa Vagi <vagimeli@amazon.com> * Update _observing-your-data/metricsanalytics.md Signed-off-by: Melissa Vagi <vagimeli@amazon.com> * Update metricsanalytics.md Signed-off-by: Melissa Vagi <vagimeli@amazon.com> Signed-off-by: Melissa Vagi <vagimeli@amazon.com> * Update _observing-your-data/metricsanalytics.md Signed-off-by: Melissa Vagi <vagimeli@amazon.com> * Update _observing-your-data/metricsanalytics.md Signed-off-by: Melissa Vagi <vagimeli@amazon.com> * Update _observing-your-data/metricsanalytics.md Signed-off-by: Melissa Vagi <vagimeli@amazon.com> * Update _observing-your-data/metricsanalytics.md Signed-off-by: Melissa Vagi <vagimeli@amazon.com> * Update _observing-your-data/metricsanalytics.md Signed-off-by: Melissa Vagi <vagimeli@amazon.com> * Update _observing-your-data/metricsanalytics.md Signed-off-by: Melissa Vagi <vagimeli@amazon.com> * Update _observing-your-data/metricsanalytics.md Signed-off-by: Melissa Vagi <vagimeli@amazon.com> * Update _observing-your-data/metricsanalytics.md Signed-off-by: Melissa Vagi <vagimeli@amazon.com> * Update _observing-your-data/metricsanalytics.md Signed-off-by: Melissa Vagi <vagimeli@amazon.com> * Update _observing-your-data/metricsanalytics.md Signed-off-by: Melissa Vagi <vagimeli@amazon.com> * Update _observing-your-data/metricsanalytics.md Signed-off-by: Melissa Vagi <vagimeli@amazon.com> * Update _observing-your-data/metricsanalytics.md Signed-off-by: Melissa Vagi <vagimeli@amazon.com> * Update _observing-your-data/metricsanalytics.md Signed-off-by: Melissa Vagi <vagimeli@amazon.com> * 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Update _observing-your-data/metricsanalytics.md Signed-off-by: Melissa Vagi <vagimeli@amazon.com> * Update _observing-your-data/metricsanalytics.md Signed-off-by: Melissa Vagi <vagimeli@amazon.com> * Doc review Signed-off-by: Melissa Vagi <vagimeli@amazon.com> * Update _observing-your-data/metricsanalytics.md Co-authored-by: Nathan Bower <nbower@amazon.com> Signed-off-by: Melissa Vagi <vagimeli@amazon.com> * Update _observing-your-data/metricsanalytics.md Co-authored-by: Nathan Bower <nbower@amazon.com> Signed-off-by: Melissa Vagi <vagimeli@amazon.com> * Update _observing-your-data/metricsanalytics.md Co-authored-by: Nathan Bower <nbower@amazon.com> Signed-off-by: Melissa Vagi <vagimeli@amazon.com> * Update _observing-your-data/metricsanalytics.md Co-authored-by: Nathan Bower <nbower@amazon.com> Signed-off-by: Melissa Vagi <vagimeli@amazon.com> * Update _observing-your-data/metricsanalytics.md Co-authored-by: Nathan Bower <nbower@amazon.com> Signed-off-by: Melissa Vagi 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<nbower@amazon.com> Signed-off-by: Melissa Vagi <vagimeli@amazon.com> * Update _observing-your-data/metricsanalytics.md Co-authored-by: Nathan Bower <nbower@amazon.com> Signed-off-by: Melissa Vagi <vagimeli@amazon.com> * Update _observing-your-data/metricsanalytics.md Co-authored-by: Nathan Bower <nbower@amazon.com> Signed-off-by: Melissa Vagi <vagimeli@amazon.com> * Update _observing-your-data/metricsanalytics.md Co-authored-by: Nathan Bower <nbower@amazon.com> Signed-off-by: Melissa Vagi <vagimeli@amazon.com> * Update _observing-your-data/metricsanalytics.md Co-authored-by: Nathan Bower <nbower@amazon.com> Signed-off-by: Melissa Vagi <vagimeli@amazon.com> * Update _observing-your-data/metricsanalytics.md Co-authored-by: Nathan Bower <nbower@amazon.com> Signed-off-by: Melissa Vagi <vagimeli@amazon.com> * Update _observing-your-data/metricsanalytics.md Co-authored-by: Nathan Bower <nbower@amazon.com> Signed-off-by: Melissa Vagi <vagimeli@amazon.com> * Update _observing-your-data/metricsanalytics.md Co-authored-by: Nathan Bower <nbower@amazon.com> Signed-off-by: Melissa Vagi <vagimeli@amazon.com> * Update _observing-your-data/metricsanalytics.md Co-authored-by: Nathan Bower <nbower@amazon.com> Signed-off-by: Melissa Vagi <vagimeli@amazon.com> * Update _observing-your-data/metricsanalytics.md Co-authored-by: Nathan Bower <nbower@amazon.com> Signed-off-by: Melissa Vagi <vagimeli@amazon.com> * Update _observing-your-data/metricsanalytics.md Co-authored-by: Nathan Bower <nbower@amazon.com> Signed-off-by: Melissa Vagi <vagimeli@amazon.com> * Update _observing-your-data/metricsanalytics.md Co-authored-by: Nathan Bower <nbower@amazon.com> Signed-off-by: Melissa Vagi <vagimeli@amazon.com> * Update _observing-your-data/metricsanalytics.md Co-authored-by: Nathan Bower <nbower@amazon.com> Signed-off-by: Melissa Vagi <vagimeli@amazon.com> * Update _observing-your-data/metricsanalytics.md Signed-off-by: Melissa Vagi <vagimeli@amazon.com> * Update _observing-your-data/metricsanalytics.md Signed-off-by: Melissa Vagi <vagimeli@amazon.com> * Update _observing-your-data/metricsanalytics.md Signed-off-by: Melissa Vagi <vagimeli@amazon.com> * Update _observing-your-data/metricsanalytics.md Signed-off-by: Melissa Vagi <vagimeli@amazon.com> * Update _observing-your-data/metricsanalytics.md Signed-off-by: Melissa Vagi <vagimeli@amazon.com> * Update _observing-your-data/metricsanalytics.md Signed-off-by: Melissa Vagi <vagimeli@amazon.com> * Update _observing-your-data/metricsanalytics.md Signed-off-by: Melissa Vagi <vagimeli@amazon.com> * Update _observing-your-data/metricsanalytics.md Signed-off-by: Melissa Vagi <vagimeli@amazon.com> --------- Signed-off-by: YANGDB <yang.db.dev@gmail.com> Signed-off-by: Melissa Vagi <vagimeli@amazon.com> Co-authored-by: Melissa Vagi <vagimeli@amazon.com> Co-authored-by: Nathan Bower <nbower@amazon.com>
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diff --git a/_observing-your-data/metricsanalytics.md b/_observing-your-data/metricsanalytics.md
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+---
+layout: default
+title: Metric analytics
+nav_order: 40
+redirect_from:
+  - /observing-your-data/metricsanalytics/
+---
+
+# Metric analytics
+Introduced 2.4
+{: .label .label-purple }
+
+With the release of OpenSearch 2.4, you can now ingest and visualize metric data stored directly in OpenSearch using the **Metrics** tool. This equips you with tools to analyze and correlate data across logs, traces, and metrics.
+
+Before the introduction of this feature, you could only ingest and visualize logs and traces from your monitored environments. With the **Metrics** tool, you can now observe your digital assets with more granularity, gain deeper insight into the health of your infrastructure, and better inform your root cause analysis.
+
+The **Metrics** tool offers federated visualization capabilities in addition to the following:
+
+ - An OpenSearch cluster containing an [OpenTelemetry (OTel)-compatible metrics index](https://github.com/opensearch-project/opensearch-catalog/tree/main/docs/schema/observability/metrics) with OTel-based signals. See [What is OpenTelemetry?](https://opentelemetry.io/docs/what-is-opentelemetry/) for an overview of OTel.
+ - An OpenSearch cluster containing a [Prometheus data source](https://github.com/opensearch-project/sql/blob/main/docs/dev/datasource-prometheus.md) connected to a Prometheus server. 
+
+The following image displays the flow for retrieving metrics from Prometheus and displaying them on a visualization dashboard.
+
+<img src="{{site.url}}{{site.baseurl}}/images/metrics/prom-metrics.png" alt="Prometheus data source" width="700"/>
+
+The following image displays an observability dashboard that visualizes metric data from the OpenSearch index using OTel queries.
+
+<img src="{{site.url}}{{site.baseurl}}/images/metrics/otel-metrics.png" alt="OTel data source" width="700"/>
+
+---
+
+## Configuring Prometheus to send metric data to OpenSearch
+
+You must first create a connection from [Prometheus](https://prometheus.io/) to OpenSearch using the [SQL plugin](https://github.com/opensearch-project/sql). You can then configure a connection to Prometheus by using the `_datasources` API endpoint. 
+
+The following example shows a request that configures a Prometheus data source without any authentication:
+
+```json
+POST _plugins/_query/_datasources 
+{
+    "name" : "my_prometheus",
+    "connector": "prometheus",
+    "properties" : {
+        "prometheus.uri" : "http://localhost:9090"
+    }
+}
+```
+{% include copy-curl.html %}
+
+The following example shows how to configure a Prometheus data source using AWS Signature Version 4 authentication:
+
+```json
+POST _plugins/_query/_datasources
+{
+    "name" : "my_prometheus",
+    "connector": "prometheus",
+    "properties" : {
+        "prometheus.uri" : "http://localhost:8080",
+        "prometheus.auth.type" : "awssigv4",
+        "prometheus.auth.region" : "us-east-1",
+        "prometheus.auth.access_key" : "{{accessKey}}"
+        "prometheus.auth.secret_key" : "{{secretKey}}"
+    }
+}
+```
+{% include copy-curl.html %}
+
+After configuring the connection, you can view Prometheus metrics in OpenSearch Dashboards by going to the **Observability** > **Metrics** page, as shown in the following image.
+
+<img src="{{site.url}}{{site.baseurl}}/images/metrics/metrics1.png" alt="Prometheus metrics displayed on a dashboard" width="700"/>
+
+### Developer resources
+
+See the following developer resources for sample code, articles, tutorials, and API references:
+
+* [Datasource Settings](https://github.com/opensearch-project/sql/blob/main/docs/user/ppl/admin/datasources.rst), which contains information about authentication and authorization of data source APIs.
+* [Prometheus Connector](https://github.com/opensearch-project/sql/blob/main/docs/user/ppl/admin/connectors/prometheus_connector.rst), which contains configuration information.
+* [Simple Schema for Observability](https://github.com/opensearch-project/opensearch-catalog/tree/main/docs/schema/observability), which contains information about the OTel schema and ingest pipeline.
+* [OTel Metrics Source](https://github.com/opensearch-project/data-prepper/tree/main/data-prepper-plugins/otel-metrics-source), which contains information about the Data Prepper metrics pipeline and ingestion.
+
+---
+
+## Experimenting with OpenTelemetry Metrics in the OpenSearch demo environment 
+
+The OpenSearch [`opentelemetry-demo` repository](https://github.com/opensearch-project/opentelemetry-demo) provides a practical demonstration of collecting, processing, and visualizing metric data through **OpenTelemetry Metrics** from OpenTelemetry and using the **Metrics** tool in OpenSearch Dashboards.
+
+### Visualizing OTel metrics in OpenSearch
+
+To visualize OTel metric data in OpenSearch, follow these steps: 
+
+1. Install the [`opentelemetry-demo` repository](https://github.com/opensearch-project/opentelemetry-demo). See the [Getting Started](https://github.com/opensearch-project/opentelemetry-demo/blob/main/tutorial/GettingStarted.md) guide for instructions.
+2. Collect the OTel signals, including metric signals. See the [OTel Collector](https://opentelemetry.io/docs/collector/) guide for instructions.  
+3. Configure the OTel pipeline to emit metric signals. See the [OTel Collector Pipeline](https://github.com/opensearch-project/opentelemetry-demo/tree/main/src/otelcollector) guide for instructions.
+
+#### Example YAML config file
+
+```yaml
+    service:
+      extensions: [basicauth/client]
+      pipelines:
+        traces:
+          receivers: [otlp]
+          processors: [batch]
+          exporters: [otlp, debug, spanmetrics, otlp/traces, opensearch/traces]
+        metrics:
+          receivers: [otlp, spanmetrics]
+          processors: [filter/ottl, transform, batch]
+          exporters: [otlphttp/prometheus, otlp/metrics, debug]
+        logs:
+          receivers: [otlp]
+          processors: [batch]
+          exporters: [otlp/logs,  opensearch/logs, debug]
+```
+{% include copy-curl.html %}
+    
+4. Configure the [Data Prepper pipeline](https://github.com/opensearch-project/opentelemetry-demo/blob/main/src/dataprepper/pipelines.yaml) to emit the collected metric signals into the OpenSearch metrics index.
+
+#### Example YAML config file
+
+```yaml
+    otel-metrics-pipeline:
+      workers: 8
+      delay: 3000
+      source:
+        otel_metrics_source:
+          health_check_service: true
+          ssl: false
+      buffer:
+        bounded_blocking:
+          buffer_size: 1024 # max number of records the buffer accepts
+          batch_size: 1024 # max number of records the buffer drains after each read
+      processor:
+        - otel_metrics:
+            calculate_histogram_buckets: true
+            calculate_exponential_histogram_buckets: true
+            exponential_histogram_max_allowed_scale: 10
+            flatten_attributes: false
+      sink:
+        - opensearch:
+            hosts: ["https://opensearch-node1:9200"]
+            username: "admin"
+            password: "my_%New%_passW0rd!@#"
+            insecure: true
+            index_type: custom
+            template_file: "templates/ss4o_metrics.json"
+            index: ss4o_metrics-otel-%{yyyy.MM.dd}
+            bulk_size: 4
+```
+{% include copy-curl.html %}
+
+5. Ingest metric data into OpenSearch. As the demo starts generating data, the metric signals will be added to the OpenSearch index that supports the OpenTelemetry Metrics schema format.
+6. On the **Metrics** page, choose `Otel-Index` from the **Data sources** dropdown menu and `Simple Schema for Observability Index` from the **OTel index** dropdown menu. A visualization is displayed, as shown in the following image.
+
+<img src="{{site.url}}{{site.baseurl}}/images/metrics/otel-metrics.png" alt="OTel metrics dashboard" width="700"/>
+
+---
+
+## Visualizing metrics in remote clusters
+Introduced 2.14
+{: .label .label-purple }
+
+You can view metrics from remote OpenSearch clusters by using the **Metrics** tool. Select the database icon on the upper-right toolbar and choose a cluster from the **DATA SOURCES** dropdown menu, as shown in the following image. You can switch from a local cluster to a remote cluster.
+
+<img src="{{site.url}}{{site.baseurl}}/images/metrics/remote-cluster-selection.png" alt="Switching clusters using the Metrics analytics tool" width="700"/>
+
+You can also view metric visualizations from other sources alongside local metric visualizations. From the **DATA SOURCES** dropdown menu, choose the remote metric visualization to add it to the group of visualizations already shown on the dashboard. An example dashboard is shown in the following image.
+
+<img src="{site.url}}{{site.baseurl}}/images/metrics/otel-metrics-remote-cluster-selection.png" alt="Metrics dashboard" width="700"/>
+
+To learn about multi-cluster support for data sources, see [Enable OpenSearch Dashboards to support multiple OpenSearch clusters](https://github.com/opensearch-project/OpenSearch-Dashboards/issues/1388).
+
+## Creating visualizations based on custom metrics
+
+You can create visualizations using the metric data collected by your OpenSearch cluster, including Prometheus metrics and custom metrics.
+
+To create these visualizations, follow these steps:
+
+1. From the OpenSearch Dashboards main menu, navigate to **Observability** > **Metrics** > **Available Metrics**.
+2. Choose the metrics to add to your visualization and then select **Save**.
+3. When prompted for a **Custom operational dashboards/application**, choose one of the listed options. You can edit the predefined name values in the **Metric Name** field.
+4. Select **Save** to save your visualization. An example visualization is shown in the following image.
+
+<img src="{{site.url}}{{site.baseurl}}/images/metrics/metrics2.png" alt="Metrics analytics dashboard with visualizations" width="700"/>
+
+## Defining PPL queries for Prometheus metrics
+
+You can define [Piped Processing Language (PPL)]({{site.url}}{{site.baseurl}}/search-plugins/sql/ppl/index/) queries to interact with metrics collected by Prometheus. The following is an example PPL query for a Prometheus metric:
+
+```
+source = my_prometheus.prometheus_http_requests_total | stats avg(@value) by span(@timestamp,15s), handler, code
+```
+{% include copy-curl.html %}
+
+### Creating a custom visualization based on the PPL query
+
+To create a custom visualization based on the PPL query, follow these steps:
+
+1. From the **Logs** page, select > **Event Explorer**.
+2. On the **Explorer** page,  enter your PPL query and select **Run**. Then select **Save**.
+3. When prompted to choose a **Custom Operational Dashboards/Application**, select one of the listed options. Optionally, you can edit the predefined name values in the **Metric Name** fields and can choose to save the visualization as a metric.
+5. Select **Save** to save your custom visualization. 
+
+Only queries that include a time-series visualization and statistics or span information can be saved as a metric, as shown in the following image.
+
+<img src="{{site.url}}{{site.baseurl}}/images/metrics/metrics3.png" alt="Saving queries as metrics" width="700"/>
diff --git a/_observing-your-data/prometheusmetrics.md b/_observing-your-data/prometheusmetrics.md
diff --git a/images/metrics/otel-metrics-remote-cluster-selection.png b/images/metrics/otel-metrics-remote-cluster-selection.png
diff --git a/images/metrics/otel-metrics.png b/images/metrics/otel-metrics.png
diff --git a/images/metrics/prom-metrics.png b/images/metrics/prom-metrics.png
diff --git a/images/metrics/remote-cluster-selection.png b/images/metrics/remote-cluster-selection.png