nextcloud-exporter 
A prometheus exporter for getting some metrics of a nextcloud server instance.
Installation
If you have a working Go installation, getting the binary should be as simple as
go get github.com/xperimental/nextcloud-exporterClient credentials
To access the serverinfo API you will need the credentials of an admin user. It is recommended to create a separate user for that purpose.
Usage
$ nextcloud-exporter --help
Usage of nextcloud-exporter:
-a, --addr string Address to listen on for connections. (default ":9205")
-p, --password string Password for connecting to nextcloud.
-t, --timeout duration Timeout for getting server info document. (default 5s)
-l, --url string URL to nextcloud serverinfo page.
-u, --username string Username for connecting to nextcloud.
Some settings can also be specified through environment variables:
| Name | Description |
|---|---|
| NEXTCLOUD_SERVERINFO_URL | URL to nextcloud serverinfo page |
| NEXTCLOUD_USERNAME | Username for connecting to nextcloud |
| NEXTCLOUD_PASSWORD | Password for connecting to nextcloud |
Command line arguments take precedence over environment variables.
After starting the server will offer the metrics on the /metrics endpoint, which can be used as a target for prometheus.
The exporter will query the nextcloud server every time it is scraped by prometheus. If you want to reduce load on the nextcloud server you need to change the scrape interval accordingly:
scrape_configs:
- job_name: 'nextcloud'
scrape_interval: 90s
static_configs:
- targets: ['localhost:9205']Info URL
The exporter reads the metrics from the Nextcloud server using its "serverinfo" API. You can find the URL of this API in the administrator settings in the "Monitoring" section. It should look something like this:
https://example.com/ocs/v2.php/apps/serverinfo/api/v1/info
If you open this URL in a browser you should see an XML structure with the information that will be used by the exporter.