# GraphiteEscapeChar "_"
# GraphiteSeparateInstances false
# GraphiteAlwaysAppendDS false
+ # GraphitePreserveSeparator false
</Publish>
# Receive values from an AMQP broker
identifier. If set to B<false> (the default), this is only done when there is
more than one DS.
+=item B<GraphitePreserveSeparator> B<false>|B<true>
+
+If set to B<false> (the default) the C<.> (dot) character is replaced with
+I<GraphiteEscapeChar>. Otherwise, if set to B<true>, the C<.> (dot) character
+is preserved, i.e. passed through.
+
=back
=head2 Plugin C<apache>
Type "counter"
Instance "local_user"
</Match>
+ <Match>
+ Regex "l=([0-9]*\\.[0-9]*)"
+ <DSType "Distribution">
+ Percentile 99
+ Bucket 0 100
+ </DSType>
+ Type "latency"
+ Instance "foo"
+ </Match>
</File>
</Plugin>
Use the last number found.
+=item B<GaugePersist>
+
+Use the last number found. The number is not reset at the end of an interval.
+It is continously reported until another number is matched. This is intended
+for cases in which only state changes are reported, for example a thermometer
+that only reports the temperature when it changes.
+
=item B<CounterSet>
=item B<DeriveSet>
not use the matched subexpression, but simply count the number of matched
lines. Thus, you may use a regular expression without submatch in this case.
+=item B<Distribution>
+
+Type to do calculations based on the distribution of values, primarily
+calculating percentiles. This is primarily geared towards latency, but can be
+used for other metrics as well. The range of values tracked with this setting
+must be in the range (0–2^34) and can be fractional. Please note that neither
+zero nor 2^34 are inclusive bounds, i.e. zero I<cannot> be handled by a
+distribution.
+
+This option must be used together with the B<Percentile> and/or B<Bucket>
+options.
+
+B<Synopsis:>
+
+ <DSType "Distribution">
+ Percentile 99
+ Bucket 0 100
+ </DSType>
+
+=over 4
+
+=item B<Percentile> I<Percent>
+
+Calculate and dispatch the configured percentile, i.e. compute the value, so
+that I<Percent> of all matched values are smaller than or equal to the computed
+latency.
+
+Metrics are reported with the I<type> B<Type> (the value of the above option)
+and the I<type instance> C<[E<lt>InstanceE<gt>-]E<lt>PercentE<gt>>.
+
+This option may be repeated to calculate more than one percentile.
+
+=item B<Bucket> I<lower_bound> I<upper_bound>
+
+Export the number of values (a C<DERIVE>) falling within the given range. Both,
+I<lower_bound> and I<upper_bound> may be a fractional number, such as B<0.5>.
+Each B<Bucket> option specifies an interval C<(I<lower_bound>,
+I<upper_bound>]>, i.e. the range I<excludes> the lower bound and I<includes>
+the upper bound. I<lower_bound> and I<upper_bound> may be zero, meaning no
+lower/upper bound.
+
+To export the entire (0–inf) range without overlap, use the upper bound of the
+previous range as the lower bound of the following range. In other words, use
+the following schema:
+
+ Bucket 0 1
+ Bucket 1 2
+ Bucket 2 5
+ Bucket 5 10
+ Bucket 10 20
+ Bucket 20 50
+ Bucket 50 0
+
+Metrics are reported with the I<type> C<bucket> and the I<type instance>
+C<E<lt>TypeE<gt>[-E<lt>InstanceE<gt>]-E<lt>lower_boundE<gt>_E<lt>upper_boundE<gt>>.
+
+This option may be repeated to calculate more than one rate.
+
=back
-As you'd expect the B<Gauge*> types interpret the submatch as a floating point
-number, using L<strtod(3)>. The B<Counter*> and B<AbsoluteSet> types interpret
-the submatch as an unsigned integer using L<strtoull(3)>. The B<Derive*> types
-interpret the submatch as a signed integer using L<strtoll(3)>. B<CounterInc>
-and B<DeriveInc> do not use the submatch at all and it may be omitted in this
-case.
+=back
+
+The B<Gauge*> and B<Distribution> types interpret the submatch as a floating
+point number, using L<strtod(3)>. The B<Counter*> and B<AbsoluteSet> types
+interpret the submatch as an unsigned integer using L<strtoull(3)>. The
+B<Derive*> types interpret the submatch as a signed integer using
+L<strtoll(3)>. B<CounterInc> and B<DeriveInc> do not use the submatch at all
+and it may be omitted in this case.
=item B<Type> I<Type>
Ignore all I<hdb> devices on any domain, but other block devices (eg. I<hda>)
will be collected.
+=item B<BlockDeviceFormat> B<target>|B<source>
+
+If I<BlockDeviceFormat> is set to B<target>, the default, then the device name
+seen by the guest will be used for reporting metrics.
+This corresponds to the C<E<lt>targetE<gt>> node in the XML definition of the
+domain.
+
+If I<BlockDeviceFormat> is set to B<source>, then metrics will be reported
+using the path of the source, e.g. an image file.
+This corresponds to the C<E<lt>sourceE<gt>> node in the XML definition of the
+domain.
+
+B<Example:>
+
+If the domain XML have the following device defined:
+
+ <disk type='block' device='disk'>
+ <driver name='qemu' type='raw' cache='none' io='native' discard='unmap'/>
+ <source dev='/var/lib/libvirt/images/image1.qcow2'/>
+ <target dev='sda' bus='scsi'/>
+ <boot order='2'/>
+ <address type='drive' controller='0' bus='0' target='0' unit='0'/>
+ </disk>
+
+Setting C<BlockDeviceFormat target> will cause the I<type instance> to be set
+to C<sda>.
+Setting C<BlockDeviceFormat source> will cause the I<type instance> to be set
+to C<var_lib_libvirt_images_image1.qcow2>.
+
+=item B<BlockDeviceFormatBasename> B<false>|B<true>
+
+The B<BlockDeviceFormatBasename> controls whether the full path or the
+L<basename(1)> of the source is being used as the I<type instance> when
+B<BlockDeviceFormat> is set to B<source>. Defaults to B<false>.
+
+B<Example:>
+
+Assume the device path (source tag) is C</var/lib/libvirt/images/image1.qcow2>.
+Setting C<BlockDeviceFormatBasename false> will cause the I<type instance> to
+be set to C<var_lib_libvirt_images_image1.qcow2>.
+Setting C<BlockDeviceFormatBasename true> will cause the I<type instance> to be
+set to C<image1.qcow2>.
+
=item B<HostnameFormat> B<name|uuid|hostname|...>
When the virt plugin logs data, it sets the hostname of the collected data
identifier. If set to B<false> (the default), this is only done when there is
more than one DS.
+=item B<PreserveSeparator> B<false>|B<true>
+
+If set to B<false> (the default) the C<.> (dot) character is replaced with
+I<EscapeCharacter>. Otherwise, if set to B<true>, the C<.> (dot) character
+is preserved, i.e. passed through.
+
=item B<DropDuplicateFields> B<false>|B<true>
If set to B<true>, detect and remove duplicate components in Graphite metric
=back
+=head2 Plugin C<write_prometheus>
+
+The I<write_prometheus plugin> implements a tiny webserver that can be scraped
+using I<Prometheus>.
+
+B<Options:>
+
+=over 4
+
+=item B<Port> I<Port>
+
+Port the embedded webserver should listen on. Defaults to B<9103>.
+
+=item B<StalenessDelta> I<Seconds>
+
+Time in seconds after which I<Prometheus> considers a metric "stale" if it
+hasn't seen any update for it. This value must match the setting in Prometheus.
+It defaults to B<300> seconds (5 minutes), same as Prometheus.
+
+B<Background:>
+
+I<Prometheus> has a global setting, C<StalenessDelta>, which controls after
+which time a metric without updates is considered "stale". This setting
+effectively puts an upper limit on the interval in which metrics are reported.
+
+When the I<write_prometheus plugin> encounters a metric with an interval
+exceeding this limit, it will inform you, the user, and provide the metric to
+I<Prometheus> B<without> a timestamp. That causes I<Prometheus> to consider the
+metric "fresh" each time it is scraped, with the time of the scrape being
+considered the time of the update. The result is that there appear more
+datapoints in I<Prometheus> than were actually created, but at least the metric
+doesn't disappear periodically.
+
+=back
+
=head2 Plugin C<write_http>
This output plugin submits values to an HTTP server using POST requests and
default), the plugin and plugin instance (and likewise the type and type
instance) are put into one component, for example C<host.cpu-0.cpu-idle>.
+=item B<GraphiteAlwaysAppendDS> B<true>|B<false>
+
+If set to B<true>, append the name of the I<Data Source> (DS) to the "metric"
+identifier. If set to B<false> (the default), this is only done when there is
+more than one DS.
+
+=item B<GraphitePreserveSeparator> B<false>|B<true>
+
+If set to B<false> (the default) the C<.> (dot) character is replaced with
+I<GraphiteEscapeChar>. Otherwise, if set to B<true>, the C<.> (dot) character
+is preserved, i.e. passed through.
+
=item B<StoreRates> B<true>|B<false>
If set to B<true> (the default), convert counter values to rates. If set to