node_exporter : add --collector.disable-defaults flag

[Korhm]

Hello,

In my current configuration of node_exporter, I set --collector.disable-defaults to only use the collectors I need.
I wanted to avoid listing all defaults collectors with the node_exporter_disabled_collectors parameter because it is a long list, and may change in future updates.

Is it possible to have such configuration parameter ?

As information, my service configure look like :

// ....
ExecStart=/usr/bin/node_exporter \
    --collector.disable-defaults \
    --collector.filesystem \
    --collector.filesystem.mount-points-exclude=^/(sys|proc|dev|host|etc|docker|run|boot)($$|/) \
    --collector.cpu \
    --collector.loadavg \
    --collector.mdadm \
    --collector.meminfo \
    --collector.os \
    --collector.time \
    --collector.uname \
    --collector.stat \
    --collector.textfile \
    --collector.textfile.directory=/prom/textfile_collector \
    --web.listen-address="0.0.0.0:9100"
// ...

Many thanks.