StorageGRID

StorageGRID Collector

The StorageGRID collector uses REST calls to collect data from StorageGRID systems.

Target System

All StorageGRID versions are supported, however the default configuration files may not completely match with older systems.

Requirements

No SDK or other requirements. It is recommended to create a read-only user for Harvest on the StorageGRID system (see prepare monitored clusters for details)

Metrics

The collector collects a dynamic set of metrics via StorageGRID's REST API. StorageGRID returns JSON documents and Harvest allows you to define templates to extract values from the JSON document via a dot notation path. You can view StorageGRID's full set of REST APIs by visiting https://$STORAGE_GRID_HOSTNAME/grid/apidocs.html

As an example, the /grid/accounts-cache endpoint, lists the tenant accounts in the cache and includes additional information, such as objectCount and dataBytes. Below is an example response from this endpoint:

{
  "data": [
    {
      "id": "95245224059574669217",
      "name": "foople",
      "policy": {
        "quotaObjectBytes": 50000000000
      },
      "objectCount": 6,
      "dataBytes": 10473454261
    }
  ]
}

The StorageGRID collector will take this document, extract the data section and convert the metrics above into: name, policy.quotaObjectBytes, objectCount, and dataBytes. Metric names will be taken, as is, unless you specify a short display name. See counters for more details.

Parameters

The parameters of the collector are distributed across three files:

• Harvest configuration file (default: harvest.yml)
• StorageGRID configuration file (default: conf/storagegrid/default.yaml)
• Each object has its own configuration file (located in conf/storagegrid/$version/)

Except for addr and datacenter, all other parameters of the StorageGRID collector can be defined in either of these three files. Parameters defined in the lower-level file, override parameters in the higher-level ones. This allows you to configure each object individually, or use the same parameters for all objects.

The full set of parameters are described below.

Harvest configuration file

Parameters in the poller section should define the following required parameters.

parameter	type	description	default
Poller name (header)	string, required	Poller name, user-defined value
addr	string, required	address (IP or FQDN) of the ONTAP system
datacenter	string, required	Datacenter name, user-defined value
username, password	string, required	StorageGRID username and password with at least Tenant accounts permissions
collectors	list, required	Name of collector to run for this poller, use StorageGrid for this collector

StorageGRID configuration file

This configuration file contains a list of objects that should be collected and the filenames of their templates ( explained in the next section).

Additionally, this file contains the parameters that are applied as defaults to all objects. As mentioned before, any of these parameters can be defined in the Harvest or object configuration files as well.

parameter	type	description	default
client_timeout	duration (Go-syntax)	how long to wait for server responses	30s
schedule	list, required	how frequently to retrieve metrics from StorageGRID
- data	duration (Go-syntax)	how frequently this collector/object should retrieve metrics from StorageGRID	5 minutes

The template should define objects in the objects section. Example:

objects:
  Tenant: tenant.yaml

For each object, we define the filename of the object configuration file. The object configuration files are located in subdirectories matching the StorageGRID version that was used to create these files. It is possible to have multiple version-subdirectories for multiple StorageGRID versions. At runtime, the collector will select the object configuration file that closest matches the version of the target StorageGRID system.

Object configuration file

The Object configuration file ("subtemplate") should contain the following parameters:

parameter	type	description	default
name	string, required	display name of the collector that will collect this object
query	string, required	REST endpoint used to issue a REST request
object	string, required	short name of the object
api	string	StorageGRID REST endpoint version to use, overrides default management API version	3
counters	list	list of counters to collect (see notes below)
plugins	list	plugins and their parameters to run on the collected data
export_options	list	parameters to pass to exporters (see notes below)

counters

This section defines the list of counters that will be collected. These counters can be labels, numeric metrics or histograms. The exact property of each counter is fetched from StorageGRID and updated periodically.

The display name of a counter can be changed with => (e.g., policy.quotaObjectBytes => logical_quota).

Counters that are stored as labels will only be exported if they are included in the export_options section.

export_options

Parameters in this section tell the exporters how to handle the collected data. The set of parameters varies by exporter. For Prometheus and InfluxDB exporters, the following parameters can be defined:

• instances_keys (list): display names of labels to export with each data-point
• instance_labels (list): display names of labels to export as a separate _label metric
• include_all_labels (bool): export all labels with each data-point (overrides previous two parameters)