We actually have to count or sum, respectively, _all_ the selected
metrics for the cluster-wide view. Which means it's easiest to use the
`scalar` approach after all (but only in the cluster dashboard). This
still propagates all the labels.
I have extended the comment for the `nodeExporterSelector` to note
that the cluster dashboard only makes sense if all the selected node
exporter actually belong to the same cluster.
Since this is jsonnet, users can easily disable the cluster
dashboard. Or even create multiple instances of the dashboards with
different `nodeExporterSelector`s for different clusters.
Signed-off-by: beorn7 <beorn@grafana.com>
As per https://github.com/prometheus/node_exporter/pull/1429#discussion_r304210103
we want to fetch all devices and all fs types.
Currently, this is done by setting empty string which breaks most queries which rely on it.
This fixes it by setting the appropriate selector instead of empty string.
Signed-off-by: Sergiusz Urbaniak <sergiusz.urbaniak@gmail.com>
This addresses the blissful scenario where single-node failures are
unproblematic. No reason to wake somebody up if a node is about to
screw itself up by filling the disk.
Signed-off-by: beorn7 <beorn@grafana.com>
