COS HighLogVolume threshold always red

[mcfly722]

Enhancement Proposal

Hello, we using juju grafana-agent to monitor Openstack environment.
All alerts transmitted to COS (Canonical Observability Stack)

There are Alert Rule: HighLogVolume that everytime is red on most of components, even if this components has legal log output messages and turned DUBUG mode off.
This rule has extremly low threshold (it is <100 messages ber 30s)

(see hardcoded grafana_agent_high_rate.rule )
So in this form it absolutelly useless! and there are no any charm paramenters to change or to specify this thresholds for each charm.

Is it possible to add this overriding parameter to specify exclusions or custom thresholds for each log with * regexp name matching?

And, I guess it should not be just two numbers, but array of rules like this:

[
	'HighLogVolume-ceph-mon':{
		filename: '/var/log/apache2//var/log/ceph/ceph-mgr.*.log',
		interval: 5m,
		threshold: 3000,
	},
        'HighLogVolume-cinder':{
		filename: '/var/log/apache2/cinder_access.log',
		interval: 60s,
		threshold: 1000
	},
	'HighLogVolume-keystone':{
		filename: '/var/log/apache2/keystone_access.log',
		interval: 20m,
		threshold: 10000
	},
	'HighLogVolume-compute':{
		filename: '/var/log/apache2/nova-api-os-compute_access.log',
		interval: 5m,
		threshold: 3000,
	}
	
	etc...
]