Description

As issue #3429 mentioned, PR #3454 missed sanitizing the resource metric labels. The Prometheus still occurring issue when the resource metrics label contains a dot.

How to fix

Just sanitize those labels when appending resource labels.

PR #3454 has already added sanitize logical in the KeyValues.Append Method. Just like this. So the sanitize logically will be active when the resource metric labels call the Append method.

func (kv *KeyValues) Append(key, value string) {
	key = sanitize(key)
	kv.keyValues = append(kv.keyValues, KeyValue{
		key,
		value,
	})
}