Default to not logging to /tmp

[wrouesnel]

A trap for new users is that the node_exporter defaults (due to glog) to logging to /tmp but doesn't seem to set any sensible rotation limits on this. Since tmp can be quite small and/or a tmpfs, this can be a sneaky problem since log files are going to unexpected places.

I think we should default -logtostderr to true, since the vast majority of users are going to want to (1) run it and see if it accepts requests and then (2) run it and forget about it (if it goes down, Prometheus will tell us).

[juliusv]

Indeed, that's one reason why we're switching everything away from glog,
including the node exporter yesterday:
#79
On May 29, 2015 04:50, "Will Rouesnel" notifications@github.com wrote:

A trap for new users is that the node_exporter defaults (due to glog) to
logging to /tmp but doesn't seem to set any sensible rotation limits on
this. Since tmp can be quite small and/or a tmpfs, this can be a sneaky
problem since log files are going to unexpected places.

I think we should default -logtostderr to true, since the vast majority
of users are going to want to (1) run it and see if it accepts requests and
then (2) run it and forget about it (if it goes down, Prometheus will tell
us).

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#80.