<Data "voltage-input-1">
RegisterBase 0
RegisterType float
+ ModbusRegisterType holding
Type voltage
Instance "input-1"
</Data>
<Data "voltage-input-2">
RegisterBase 2
RegisterType float
+ ModbusRegisterType holding
Type voltage
Instance "input-2"
</Data>
B<Uint32> or B<Float>, two 16E<nbsp>bit registers will be read and the data is
combined into one value. Defaults to B<Uint16>.
+=item B<ModbusRegisterType> B<holding>|B<input>
+
+Specifies register type to be collected from device. Works only with libmodbus
+2.9.2 or higher. Defaults to B<holding>.
+
=item B<Type> I<Type>
Specifies the "type" (data set) to use when dispatching the value to
Specify the password to be used when connecting to the server.
+=item B<ExpireDelay> I<delay>
+
+Skip expired values in query output.
+
=item B<SSLMode> I<disable>|I<allow>|I<prefer>|I<require>
Specify whether to use an SSL connection when contacting the server. The
Host "localhost"
Port "6379"
Timeout 2000
+ <Query "LLEN myqueue">
+ Type "queue_length"
+ Instance "myqueue"
+ <Query>
</Node>
</Plugin>
in mind that the sum of all B<Timeout> values for all B<Nodes> should be lower
than B<Interval> defined globally.
+=item B<Query> I<Querystring>
+
+The B<Query> block identifies a query to execute against the redis server.
+There may be an arbitrary number of queries to execute.
+
+=item B<Type> I<Collectd type>
+
+Within a query definition, a valid collectd type to use as when submitting
+the result of the query. When not supplied, will default to B<gauge>.
+
+=item B<Instance> I<Type instance>
+
+Within a query definition, an optional type instance to use when submitting
+the result of the query. When not supplied will default to the escaped
+command, up to 64 chars.
+
=back
=head2 Plugin C<rrdcached>
computed latency. This is useful for cutting off the long tail latency, as it's
often done in I<Service Level Agreements> (SLAs).
-If not specified, no percentile is calculated / dispatched.
+Different percentiles can be calculated by setting this option several times.
+If none are specified, no percentiles are calculated / dispatched.
+
+=item B<TimerLower> B<false>|B<true>
+
+=item B<TimerUpper> B<false>|B<true>
+
+=item B<TimerSum> B<false>|B<true>
+
+=item B<TimerCount> B<false>|B<true>
+
+Calculate and dispatch various values out of I<Timer> metrics received during
+an interval. If set to B<False>, the default, these values aren't calculated /
+dispatched.
=back
The matched number is a counter. Simply I<sets> the internal counter to this
value. Variants exist for C<COUNTER>, C<DERIVE>, and C<ABSOLUTE> data sources.
+=item B<GaugeAdd>
+
=item B<CounterAdd>
=item B<DeriveAdd>
matched number may be negative, which will effectively subtract from the
internal counter.
+=item B<GaugeInc>
+
=item B<CounterInc>
=item B<DeriveInc>
=head2 Plugin C<varnish>
The I<varnish plugin> collects information about Varnish, an HTTP accelerator.
+It collects a subset of the values displayed by L<varnishstat(1)>, and
+organizes them in categories which can be enabled or disabled. Currently only
+metrics shown in L<varnishstat(1)>'s I<MAIN> section are collected. The exact
+meaning of each metric can be found in L<varnish-counters(7)>.
Synopsis:
<Plugin "varnish">
<Instance "example">
+ CollectBackend true
+ CollectBan false
CollectCache true
CollectConnections true
- CollectBackend true
- CollectSHM true
+ CollectDirectorDNS false
CollectESI false
CollectFetch false
CollectHCB false
+ CollectObjects false
+ CollectPurge false
+ CollectSession false
+ CollectSHM true
CollectSMA false
CollectSMS false
CollectSM false
+ CollectStruct false
CollectTotals false
+ CollectUptime false
+ CollectVCL false
+ CollectVSM false
CollectWorkers false
</Instance>
</Plugin>
=over 4
-=item B<CollectCache> B<true>|B<false>
-
-Cache hits and misses. True by default.
-
-=item B<CollectConnections> B<true>|B<false>
-
-Number of client connections received, accepted and dropped. True by default.
-
=item B<CollectBackend> B<true>|B<false>
Back-end connection statistics, such as successful, reused,
and closed connections. True by default.
-=item B<CollectSHM> B<true>|B<false>
-
-Statistics about the shared memory log, a memory region to store
-log messages which is flushed to disk when full. True by default.
-
=item B<CollectBan> B<true>|B<false>
Statistics about ban operations, such as number of bans added, retired, and
number of objects tested against ban operations. Only available with Varnish
-3.x. False by default.
+3.x and above. False by default.
+
+=item B<CollectCache> B<true>|B<false>
+
+Cache hits and misses. True by default.
+
+=item B<CollectConnections> B<true>|B<false>
+
+Number of client connections received, accepted and dropped. True by default.
=item B<CollectDirectorDNS> B<true>|B<false>
=item B<CollectSession> B<true>|B<false>
Client session statistics. Number of past and current sessions, session herd and
-linger counters, etc. False by default.
+linger counters, etc. False by default. Note that if using Varnish 4.x, some
+metrics found in the Connections and Threads sections with previous versions of
+Varnish have been moved here.
+
+=item B<CollectSHM> B<true>|B<false>
+
+Statistics about the shared memory log, a memory region to store
+log messages which is flushed to disk when full. True by default.
=item B<CollectSMA> B<true>|B<false>
=item B<CollectUptime> B<true>|B<false>
-Varnish uptime. False by default.
+Varnish uptime. Only available with Varnish 3.x and above. False by default.
=item B<CollectVCL> B<true>|B<false>
Number of total (available + discarded) VCL (config files). False by default.
+=item B<CollectVSM> B<true>|B<false>
+
+Collect statistics about Varnish's shared memory usage (used by the logging and
+statistics subsystems). Only available with Varnish 4.x. False by default.
+
=item B<CollectWorkers> B<true>|B<false>
Collect statistics about worker threads. False by default.
=back
+=head2 Plugin C<write_redis>
+
+The I<write_redis plugin> submits values to I<Redis>, a data structure server.
+
+Synopsis:
+
+ <Plugin "write_redis">
+ <Node "example">
+ Host "localhost"
+ Port "6379"
+ Timeout 1000
+ </Node>
+ </Plugin>
+
+Values are submitted to I<Sorted Sets>, using the metric name as the key, and
+the timestamp as the score. Retrieving a date range can then be done using the
+C<ZRANGEBYSCORE> I<Redis> command. Additionnally, all the identifiers of these
+I<Sorted Sets> are kept in a I<Set> called C<collectd/values> and can be
+retrieved using the C<SMEMBERS> I<Redis> command. See
+L<http://redis.io/commands#sorted_set> and L<http://redis.io/commands#set> for
+details.
+
+The information shown in the synopsis above is the I<default configuration>
+which is used by the plugin if no configuration is present.
+
+The plugin can send values to multiple instances of I<Redis> by specifying
+one B<Node> block for each instance. Within the B<Node> blocks, the following
+options are available:
+
+=over 4
+
+=item B<Node> I<Nodename>
+
+The B<Node> block identifies a new I<Redis> node, that is a new I<Redis>
+instance running in an specified host and port. The name for node is a
+canonical identifier which is used as I<plugin instance>. It is limited to
+64E<nbsp>characters in length.
+
+=item B<Host> I<Hostname>
+
+The B<Host> option is the hostname or IP-address where the I<Redis> instance is
+running on.
+
+=item B<Port> I<Port>
+
+The B<Port> option is the TCP port on which the Redis instance accepts
+connections. Either a service name of a port number may be given. Please note
+that numerical port numbers must be given as a string, too.
+
+=item B<Timeout> I<Timeout in miliseconds>
+
+The B<Timeout> option sets the socket connection timeout, in milliseconds.
+
+=back
+
=head2 Plugin C<write_riemann>
The I<write_riemann plugin> will send values to I<Riemann>, a powerful stream
=back
+=head2 Plugin C<zookeeper>
+
+The I<zookeeper plugin> will collect statistics from a I<Zookeeper> server
+using the mntr command. It requires Zookeeper 3.4.0+ and access to the
+client port.
+
+B<Synopsis:>
+
+ <Plugin "zookeeper">
+ Host "127.0.0.1"
+ Port "2181"
+ </Plugin>
+
+=over 4
+
+=item B<Host> I<Address>
+
+Hostname or address to connect to. Defaults to C<localhost>.
+
+=item B<Port> I<Service>
+
+Service name or port number to connect to. Defaults to C<2181>.
+
+=back
+
=head1 THRESHOLD CONFIGURATION
Starting with version C<4.3.0> collectd has support for B<monitoring>. By that
projects / collectd.git / blobdiff