Nagios/Icinga2 Plugin: Monitor Disk Usage of Hetzner Storagebox

A plugin that monitors disk usage of a Hetzner StorageBox using the Hetzner API. Depending on the used percentage the status (OK, WARNING, CRITICAL or UNKNOWN) is returned.

Preparation

• Get the credentials for the Hetzner Console API through the Hetzner Console
  • You can create the API token under Security/API Tokens/Create API Token (DE: Sicherheit /API Token/API Token hinzufügen)
• Get the id of your storagebox
  • Through the browser
    • Access https://console.hetzner.com
    • Enter username and password you set in the previous step
    • Go to Storage Boxes
    • under name/id in the second column is your id (without #)
  • Using cURL
    • Execute curl -H "Authorization: Bearer YourAPIToken" https://api.hetzner.com/v1/storage_boxes (substitute YourAPIToken accordingly)
    • You will get all data from all storages you own. Search for key id.

Setup

Downloads binary from releases and set executable bit.

wget https://github.com/muensmedia/check_hetzner_storagebox/releases/download/latest/check_hetzner_storagebox-amd64 -O check_hetzner_storagebox
chmod +x check_hetzner_storagebox

Example for Icinga2 CheckCommand

Click to see example for Icinga2 CheckCommand

object CheckCommand "check_hetzner_storagebox" {
import "plugin-check-command"
command = [ "/etc/icinga2-scripts/check_hetzner_storagebox" ]
timeout = 1m
arguments += {
        "-c" = {
            description = "Critical"
            repeat_key = false
            required = false
            value = "$critical$"
        }
        "-id" = {
            description = "ID of the Storagebox"
            repeat_key = false
            required = true
            value = "$storagebox_id$"
        }
        "-api" = {
            description = "API key"
            repeat_key = false
            required = true
            value = "$storagebox_api_key$"
        }
        "-w" = {
            description = "Warning"
            repeat_key = false
            required = true
            value = "$warning$"
        }
    }
    vars.critical = "90"
    vars.storagebox_api_key = "default-password"
    vars.warning = "80"
}

CLI Usage:

usage: check_hetzner_storagebox [-h] -api SecretAPIKey -id ID [-w WARNING_PERCENT] [-c CRITICAL_PERCENT]

Nagios/Icinga Plugin to measure disk usage of Hetzner Storagebox via API.

optional arguments:
  -h, --help            show this help message and exit
  -api                  Hetzner API Key
  -id ID, --identifier ID
                        ID of Hetzner Storagebox
  -w WARNING_PERCENT, --warning WARNING_PERCENT
                        Percentage threshold the status "WARNING"
  -c CRITICAL_PERCENT, --critical CRITICAL_PERCENT
                        Percentage threshold the status "CRITICAL"