[DOCS-14455] Add custom log config to Fleet Automation (#38049)

* [DOCS-14455] Add custom log config to Fleet Automation

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Co-authored-by: Esther Kim <esther.kim@datadoghq.com>

---------

Co-authored-by: Esther Kim <esther.kim@datadoghq.com>

Author: evazorro

config/_default/menus/main.en.yaml

@@ -565,16 +565,21 @@ menu:
       url: agent/fleet_automation/configure_integrations
       parent: agent_fleet_automation
       weight: 803
+    - name: Configure Custom Logs
+      identifier: configure_logs
+      url: agent/fleet_automation/configure_logs
+      parent: agent_fleet_automation
+      weight: 804
     - name: Upgrade Agents
       identifier: upgrade_agents
       url: agent/fleet_automation/upgrade_agents
       parent: agent_fleet_automation
-      weight: 804
+      weight: 805
     - name: Upgrade SDKs
       identifier: upgrade_sdks
       url: agent/fleet_automation/upgrade_sdks
       parent: agent_fleet_automation
-      weight: 805
+      weight: 806
     - name: Troubleshooting
       url: agent/troubleshooting/
       parent: agent

content/en/agent/fleet_automation/configure_logs.md

@@ -0,0 +1,67 @@
+---
+title: Configure Custom Logs
+description: "Remotely configure custom log collection at scale with Fleet Automation."
+private: true
+further_reading:
+- link: "/agent/fleet_automation/"
+  tag: "Documentation"
+  text: "Fleet Automation"
+- link: "/agent/fleet_automation/configure_integrations/"
+  tag: "Documentation"
+  text: "Configure Agent Integrations"
+- link: "/agent/fleet_automation/configure_agents/"
+  tag: "Documentation"
+  text: "Configure Agents"
+- link: "/api/latest/fleet-automation/"
+  tag: "Documentation"
+  text: "Fleet Automation API"
+site_support_id: fleet-automation-standard-features
+---
+
+Use [Fleet Automation][2] to manage custom log collection settings on your Agents remotely at scale.
+
+## Prerequisites
+
+- [Remote Configuration][1] enabled for your organization
+- Agent version 7.76 or later
+- Linux VMs (installed with the install script or the Ansible Datadog Role) or Windows VMs
+
+<div class="alert alert-info">
+Configuring custom logs on Agents in containerized workloads is not supported.
+</div>
+
+## Configure custom logs across multiple Agents
+
+<div class="alert alert-tip">As you step through the configuration wizard, the <strong>Configuration Summary</strong> panel shows your current selected scope of Agents. Use this to check how a change would affect an Agent by previewing configuration diffs on a specific Agent in scope.</a></div>
+
+1. In Fleet Automation, open the [{{< ui >}}Configuration{{< /ui >}}][2] tab and click {{< ui >}}Configure Agents{{< /ui >}}.
+1. Scope the configuration to the target Agents. Filter by host information or tags to target a specific group.
+1. Choose {{< ui >}}Custom Logs{{< /ui >}}.
+1. Select an operation (for more information, see [How configuration changes are applied](#how-configuration-changes-are-applied)):
+
+    - {{< ui >}}Add New{{< /ui >}}. Specify the filename for the new configuration file, and fill in the configuration as prompted. You can add additional log collection settings by clicking {{< ui >}}+ Add Log Collection{{< /ui >}}.
+    - {{< ui >}}Edit & Replace{{< /ui >}}. Click {{< ui >}}Select a File{{< /ui >}} and choose the configuration file you want to replace, then update the log collection settings.
+    - {{< ui >}}Delete{{< /ui >}}. Click {{< ui >}}Select a File to Delete{{< /ui >}}.
+
+    <div class="alert alert-tip">Toggle between <strong>Visual</strong> and <strong>YAML</strong> mode when filling out the log collection configuration. Use <strong>YAML</strong> mode to paste in YAML directly.</div>
+
+1. Review the deployment plan. Fleet Automation generates a configuration diff for each affected Agent so you can verify the exact changes.
+1. Click {{< ui >}}Deploy Configuration{{< /ui >}} to start the deployment. Track progress from the [Deployments page][3].
+
+## How configuration changes are applied
+
+Each operation applies changes to custom log collection on an Agent differently:
+
+- {{< ui >}}Add New{{< /ui >}}: Deploys a new configuration file.
+
+- {{< ui >}}Edit & Replace{{< /ui >}}: Replaces the entire configuration file. Include all desired values in your update. Any values you omit are removed.
+
+- {{< ui >}}Delete{{< /ui >}}: Removes the configuration file from the target Agents.
+
+## Further Reading
+
+{{< partial name="whats-next/whats-next.html" >}}
+
+[1]: /agent/guide/setup_remote_config
+[2]: https://app.datadoghq.com/fleet/agent-management
+[3]: https://app.datadoghq.com/fleet/deployments