On Fri, 2020-02-14 at 15:58 +0100, Julius Volz wrote: > On Fri, Feb 14, 2020 at 2:01 PM Conrad Wood <c...@conradwood.net> > wrote: > > That is a good point, I did not consider that labels might have > > been > > aggregated away. Clearly that needs to be considered. > > > > However, the ACLEvaluator also needs to look at the label values > > once > > the query returns(see Example 2). Or is there a way that one can > > query > > Note that putting IP addresses or similar high-cardinality items into > Prometheus label names doesn't work well unless the possible set of > values is restricted to a reasonable number. Otherwise you'll blow up > your Prometheus server immediately (a big server can do a couple > million series that are present at the same time, and every unique > combination of label values creates one series, so usually just > putting public IPs into label values is a no-starter, since it > multiplies up with other labels very quickly). > > > for all values of a set of labels for a given metric without the > > datapoints in a given timerange? > > There is: > https://prometheus.io/docs/prometheus/latest/querying/api/#querying-metadata > > ...but again, you'll probably run into cardinality overload if you > have an unbounded number of IPs in label values. > > > Also, the "parsing of promql" - is that available in a library or > > as an > > RPC? If not, would that be also considered out-of-scope? > > You would use Prometheus's "promql" Go package: > https://godoc.org/github.com/prometheus/prometheus/promql >
Thank you, I hear you re unbound labels, especially with IPs. In this case there is quite a small set of IPs (<2048), probably even less. The information you send is most helpful. I believe I now have sufficient information to fix something up that will address my usecase outside of prometheus. Thanks again, Conrad -- You received this message because you are subscribed to the Google Groups "Prometheus Developers" group. To unsubscribe from this group and stop receiving emails from it, send an email to prometheus-developers+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/prometheus-developers/b556929c59a02d04b92ad6c9422e1ae7fca8c78b.camel%40conradwood.net.
