Added NAPALM documentation

docs/additional-features/napalm.md

@@ -0,0 +1,65 @@
+# NAPALM
+
+NetBox supports integration with the [NAPALM automation](https://napalm-automation.net/) library. NAPALM allows NetBox to fetch live data from devices and return it to a requester via its REST API.
+
+!!! info
+    To enable the integration, the NAPALM library must be installed. See [installation steps](../../installation/2-netbox/#napalm-automation-optional) for more information.
+
+```
+GET /api/dcim/devices/1/napalm/?method=get_environment
+
+{
+    "get_environment": {
+        ...
+    }
+}
+```
+
+## Authentication
+
+By default, the [`NAPALM_USERNAME`](../../configuration/optional-settings/#napalm_username) and [`NAPALM_PASSWORD`](../../configuration/optional-settings/#napalm_password) are used for NAPALM authentication. They can be overridden for an individual API call through the `NAPALM-Username` and `NAPALM-Password` headers.
+
+```
+$ curl "http://localhost/api/dcim/devices/1/napalm/?method=get_environment" \
+-H "Authorization: Token f4b378553dacfcfd44c5a0b9ae49b57e29c552b5" \
+-H "Content-Type: application/json" \
+-H "Accept: application/json; indent=4" \
+-H "NAPALM-Username: foo" \
+-H "NAPALM-Password: bar"
+```
+
+## Method Support
+
+The list of supported NAPALM methods depends on the [NAPALM driver](https://napalm.readthedocs.io/en/latest/support/index.html#general-support-matrix) configured for the platform of a device. NetBox only supports [get](https://napalm.readthedocs.io/en/latest/support/index.html#getters-support-matrix) methods.
+
+## Multiple Methods
+
+More than one method in an API call can be invoked by adding multiple `method` parameters. For example:
+
+```
+GET /api/dcim/devices/1/napalm/?method=get_ntp_servers&method=get_ntp_peers
+
+{
+    "get_ntp_servers": {
+        ...
+    },
+    "get_ntp_peers": {
+        ...
+    }
+}
+```
+
+## Optional Arguments
+
+The behavior of NAPALM drivers can be adjusted according to the [optional arguments](https://napalm.readthedocs.io/en/latest/support/index.html#optional-arguments). NetBox exposes those arguments using headers prefixed with `NAPALM-`.
+
+
+For instance, the SSH port is changed to 2222 in this API call:
+
+```
+$ curl "http://localhost/api/dcim/devices/1/napalm/?method=get_environment" \
+-H "Authorization: Token f4b378553dacfcfd44c5a0b9ae49b57e29c552b5" \
+-H "Content-Type: application/json" \
+-H "Accept: application/json; indent=4" \
+-H "NAPALM-port: 2222"
+```

mkdocs.yml

@@ -35,6 +35,7 @@ pages:
         - Custom Scripts: 'additional-features/custom-scripts.md'
         - Export Templates: 'additional-features/export-templates.md'
         - Graphs: 'additional-features/graphs.md'
+        - NAPALM: 'additional-features/napalm.md'
         - Prometheus Metrics: 'additional-features/prometheus-metrics.md'
         - Reports: 'additional-features/reports.md'
         - Tags: 'additional-features/tags.md'