relabel actions are exclusive. Drop means keep everything but X. Keep means 
drop everything but X.

For your exact problem, there is already a node_exporter flag to handle 

./node_exporter --collector.systemd.unit-include="(ssh|apache)"

This will also be more efficient because it it will only gather data about 
those two units.

On Monday, March 11, 2024 at 9:27:30 PM UTC+1 mel wrote:

> Hello I am using node_exporter and I am trying to drop all 
> node_systemd_unit_state metrics except for a handful of services like 
> (e.g.,) ssh and apache. How would I do this? I came up with the following, 
> but I don't think this is correct because it will drop other metrics as 
> well (metrics that are not related to systemd service)
> metric_relabel_configs:
>     - source_labels: [__name__, name]
>       regex: 'node_systemd_unit_state;(ssh|apache).*'
>       action: keep
> How do I drop all service metrics except for ssh and apache service?

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