OpenSearch

_docs/deployment/logs.md

@@ -49,7 +49,7 @@ If you receive `Error dialing trafficcontroller server`:
 
 To view and search your logs on the web, including historic log data, visit [https://logs.fr.cloud.gov/](https://logs.fr.cloud.gov/).
 
-Logs are currently retained for 180 days, and you will only see data for applications deployed within the [orgs](http://docs.cloudfoundry.org/concepts/roles.html#orgs) and [spaces](http://docs.cloudfoundry.org/concepts/roles.html#spaces) where you have access.
+Logs are currently retained for 365 days for live search (three years offline), and you will only see data for applications deployed within the [orgs](http://docs.cloudfoundry.org/concepts/roles.html#orgs) and [spaces](http://docs.cloudfoundry.org/concepts/roles.html#spaces) where you have access.
 
 After logging in, you'll see the App Overview dashboard.
 
@@ -64,7 +64,10 @@ You can also view several dashboards that present different visualizations of yo
 
 !["Select dashboards"]({{site.baseurl}}/assets/images/content/select-dashboard.png)
 
-These visualizations are provided via Kibana, which has a [user guide](https://www.elastic.co/guide/en/kibana/current/index.html) that explains more about how to use it and customize your views.
+These visualizations are provided via OpenSearch Dashboards. You can learn more about
+OpenSearch in our [Cloud.gov Knowledge Base](https://search.usa.gov/search/docs?affiliate=cloud.gov&dc=9299&query=OpenSearch)
+and in the [OpenSearch Dashboards documentation](https://opensearch.org/docs/latest/).
+
 
 ### Structured logging
 

_kbarticles/2024-12-10-using-opensearch-dashboards.md

@@ -0,0 +1,73 @@
+---
+layout: post
+title: "Understanding OpenSearch Dashboards, logging and how to visualize your application logs"
+date: December 10, 2024
+excerpt: This article briefly explains what opensearch dashboards does, what types of logs are available in Dashboards, creating dashboards, and how to create log visualizations in Dashboards.
+redirect_from:
+  - /knowledge-base/2022-12-08-common-kibana-searches-on-clouddotgov/
+
+---
+
+## What does Dashboards do?
+
+Dashboards is a user interface that lets you search and visualize your application logs. Dashboards has a [user guide](https://opensearch.org/docs/latest/dashboards/) that explains more about how to use it and to create custom visualizations.
+
+## What are some types of logs?
+
+Cloud Foundry assigns a type to each log message depending on its origin. Application logs are assigned the APP log type. HTTP requests being routed to an app will produce the RTR log type. The various types of logs [are listed in the CloudFoundry documentation](https://docs.cloudfoundry.org/devguide/deploy-apps/streaming-logs.html#format).
+
+The log type is stored on logs in the `@source.type` field. So to query for application logs, you could use a filter of `@source.type: "APP"`.
+
+## Querying Logs
+
+Cloud Foundry logs have a few useful fields which will be helpful for querying logs.
+Cloud Foundry has 3 fields that can be very helpful to filter down what app logs show up.
+
+- `@cf.org` - The organization, this is applicable to multi-org users
+- `@cf.space` - The space in a organization.
+- `@cf.app` - The app in a space.
+
+Other fields that may be useful for querying:
+
+- `@message` - the app specific message attached to the log. This field supports full-text searching, so you can do a search of `@message: "foo"` to find all logs where `@message` contains `foo`. 
+- `@raw` - the raw message received by OpenSearch before parsing into other fields. This field also supports full-text searching
+
+## How to visualize application traffic
+
+Router log data can be used to create a visualization of your application traffic following the steps below.
+
+After you have logged into Dashboards, click "Discover" in the left sidebar menu. Then, add filters(under search bar) and search terms to query for router logs as seen in the screenshot below. Please note that the filters shown here for a specific space and application are just an example. You might want to view logs for all requests to application in a given space, in which case you would not want a filter for `@cf.app`.
+
+![Screenshot of Dashboard interface showing a query for router logs for a given CloudFoundry space and application]({{ site.baseurl }}/assets/images/content/dashboard-router.png)
+
+The next step is to visualize your search results based on a specific field. To visualize request logs over time, choose the `@timestamp` field from the left sidebar of "Available fields". Then, click "Visualize".
+
+![Screenshot of Dashboards interface showing the selection of @timestamp as field to use for visualizing request logs]({{ site.baseurl }}/assets/images/content/opensearch-timestamp.png)
+
+By default, visualizing logs based on `@timestamp` will produce a histogram chart. To change the chart type to line, which might be more useful for this type of data, click the "Metrics & axes" link in the chart configuration panel on the right side of the screen. Then, under "Metrics" and "Count", select "Line" from the "Chart type" drop-down. Finally, click the "Update" button at the bottom right of the screen and the chart should update to a line chart.
+
+![Screenshot of Dashboards visualization interface showing a line chart of requests over time with a panel for chart configuration options visible on the right side of the screen. In the chart configuration options, "line" is selected as the chart type]({{ site.baseurl }}/assets/images/content/dashboard-line.png)
+
+## Fields for router requests
+
+Listed below are the explanations of some field names for router (RTR) logs:
+
+- **rtr.app.id**: The application guid
+- **rtr.hostname**: The domain/hostname the request was sent to (e.g test.app.cloud.gov)
+- **rtr.http_user_agent**: What user agent the request came from (Chrome, Firefox, Curl, etc…)
+- **rtr.path**: The specific url path that was requested (e.g. /my/test/page)
+- **rtr.status**: Gives the status of the request (200, 404, etc…)
+- **rtr.verb**: The type of request (POST, GET, etc...)
+- **rtr.x_forwarded_for**: The IP address the request came from
+- **rtr.timestamp**: The time of the request in UTC
+
+The full list of fields available for router logs can be found in [our OpenSearch field mapping configuration](https://github.com/cloud-gov/opensearch-boshrelease/blob/main/jobs/opensearch_templates/templates/component-index-mappings-app.json.erb#L46)
+
+## Generate report of logs.
+
+OpenSearch allows for [generating a report](https://opensearch.org/docs/latest/reporting/report-dashboard-index/) from a saved search. This is done by choosing a search and clicking the **Reporting** menu option.
+
+![Screenshot of Dashboards interface showing dashboard selection]({{ site.baseurl }}/assets/images/content/opensearch-reporting.png)
+
+**Reports have a non-configurable 10,000 row limit**. They have no explicit size limit (for example, MB),
+but extremely large documents could cause report generation to fail