Google Storage

Monitoring Connector Assets

Monitored Objects

The Monitoring Connector Google Storage collects metrics for:

• Bucket

Discovery rules

The Centreon Monitoring Connector Google Storage includes a Host Discovery provider to automatically discover storages for a given Google Cloud Project.

This provider is named Google Storage:

Note that the key file must be deployed on the Poller(s) expected to discover GCP assets.

More information about the Host Discovery module is available in the Centreon documentation: Host Discovery

Collected Metrics

For all collected metrics, we can choose the aggregation: average, minimum, maximum and total.

Bucket

Metric name	Description	Unit
bucket_name~aggregation#storage.bucket.objects.count	Number of objects
bucket_name~aggregation#storage.network.received.volume.bytes	Count of bytes received over the network	B
bucket_name~aggregation#storage.network.received.volume.bytespersecond	Count of bytes received per second over the network	B/s
bucket_name~aggregation#storage.network.sent.volume.bytes	Count of bytes sent over the network	B
bucket_name~aggregation#storage.network.sent.volume.bytespersecond	Count of bytes sent per second over the network	B/s

Prerequisites

Google Cloud Configuration

Configure a service account key (download its private key as a JSON file) for which the following privileges have to be granted:

Google Scope	Description
https://www.googleapis.com/auth/cloud-platform	View and manage your data across Google Cloud Platform services

How to create a service account key: https://developers.google.com/identity/protocols/oauth2/service-account

Centreon

Deploy the key file on every Poller expected to monitor Google Cloud resources. The key file should be readable by centreon-engine poller.

Setup

Online License

1. Install the Centreon Plugin on every Poller:

yum install centreon-plugin-Cloud-Gcp-Storage-Api

2. On the Centreon Web interface in Configuration > Monitoring Connectors Manager, install the Google Storage Monitoring Connector

Offline License

1. Install the Centreon Plugin on every Poller:

yum install centreon-plugin-Cloud-Gcp-Storage-Api

2. On the Centreon Central server, install the Centreon Monitoring Connector from the RPM:

yum install centreon-pack-cloud-gcp-storage

3. On the Centreon Web interface in Configuration > Monitoring Connectors Manager, install the Google Storage Monitoring Connector

Host configuration

• Add a new Host and apply the Cloud-Gcp-Storage-custom Host Template

Once the template applied, some Macros have to be configured:

Mandatory	Name	Description
X	GCPKEYFILEPATH	Service account key json file
X	GCPSCOPEENDPOINT	Google Scope. Default: https://www.googleapis.com/auth/cloud-platform
X	GCPDIMENSIONNAME	The name of the dimension to filter on. Default: resource.labels.bucket_name
X	GCPDIMENSIONOPERATOR	Define the type of filter match to use. Default: equals
X	GCPDIMENSIONVALUE	Name of the bucket you want to monitor.
	PROXYURL	Configure proxy URL
	GCPEXTRAOPTIONS	Any extra option you may want to add to every command_line (eg. a --verbose flag)
	DUMMYSTATUS	Host state. Default is OK, do not modify it until you know what you are doing
	DUMMYOUTPUT	Host check output. Default is 'This is a dummy check'. Customize it with your own if needed

Service account key file must be stored on Centreon Poller. centreon-engine user account must have read privileges on that file.

FAQ

How to test the Plugin and what are the main options for?

Once the plugin installed, log into your Centreon Poller CLI using the centreon-engine user account and test the Plugin by running the following command:

/usr/lib/centreon/plugins/centreon_gcp_storage_api.pl \
    --plugin=cloud::google::gcp::storage::plugin \
    --mode=bucket \
    --key-file=/var/lib/centreon-engine/centreon-dev-6e5531fc9e82.json \
    --dimension-name='resource.labels.bucket_name' \
    --dimension-operator='equals' \
    --dimension-value='centreon-dev.appspot.com' \
    --aggregation='average' \
    --warning-bucket-objects='1000' \
    --critical-bucket-objects='2000' \
    --verbose

Expected command output is shown below:

OK: Instance 'centreon-dev.appspot.com' aggregation 'average' metrics objects: 0.00, received: 0.00 B, sent: 382.00 B | 'centreon-dev.appspot.com~average#storage.bucket.objects.count'=0.00;0:1000;0:2000;0; 'centreon-dev.appspot.com~average#storage.network.received.volume.bytes'=0.00B;;;0; 'centreon-dev.appspot.com~average#storage.network.sent.volume.bytes'=382.00B;;;0;
Checking 'centreon-dev.appspot.com'
    aggregation 'average' metrics objects: 0.00, received: 0.00 B, sent: 382.00 B

The command above monitors bucket usage of a Google Storage (--plugin=cloud::google::gcp::storage::plugin --mode=bucket) identified by the name centreon-dev.appspot.com (--dimension-name='resource.labels.bucket_name' --dimension-operator='equals' --dimension-value='centreon-dev.appspot.com').

This command would trigger a WARNING alarm if number of objects is more than 1000 (--warning-bucket-objects='1000') and a CRITICAL alarm for more than 2000 (--critical-bucket-objects='2000').

All the options as well as all the available thresholds can be displayed by adding the --help parameter to the command:

/usr/lib/centreon/plugins/centreon_gcp_storage_api.pl \
    --plugin=cloud::google::gcp::storage::plugin \
    --mode=bucket \
    --help

Why do I get the following result UNKNOWN: No metrics. Check your options or use --zeroed option to set 0 on undefined values ?

This command result means that Google Cloud does not have any value for the requested period.

This result can be overriden by adding the --zeroed option in the command. This will force a value of 0 when no metric has been collected and will prevent the UNKNOWN error message.