Right now I'm scraping metrics from a Node Exporter. Some of the metrics
which the Node Exporters exports have a `mountpoint` label.
I'd like to drop time series that have this label and **do not** match a
regular expression. I tried using the `keep` action (as I'd like to keep
time series that **do** match this regular expression) but this also drops
all other metrics that do not have the `mountpoint` label.
"metric_relabel_configs:
- source_labels: ['mountpoint']
regex: '(\/home|\/var\/domains)\/something.*'
action: keep"
I tried using the `drop` action too but this requires me to inverse the
regular expression using a negative-lookahead (which isn't supported
because Prometheus is written in Go of course).
What are my options in this?
**Important,** I do not have control over the way the Node Exporter is
configured, thus I can't configure the Node Exporter itself to not export
metrics for some specific mountpoint (if this is even possible).
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