+2015-05-20, Version 5.5.0
+ * Build system: Ability to make out-of-tree builds has been fixed.
+ Thanks to Vincent Bernat. #792
+ * Build system, Disk and Users plugins: Detection and use of
+ libstatgrab ≧ 0.90 has been added. Thanks to Vincent Bernat. #445,
+ #795, #806, #807, #908
+ * Build system, Memory, CPU, TCPConns and Processes plugins: Numerous
+ fixes related to OpenBSD support have been added. Thanks to Landry
+ Breuil. #777, #778, #779, #808
+ * Build system: Plugins now only export "module_register()". Thanks to
+ Florian Forster.
+ * Build system: Various cleanups and improvements have been done.
+ Thanks to Marc Fournier.
+ * collectd: Numerous internal changes and improvements to the daemon
+ and the plugin API have been make. Thanks to Florian Forster,
+ Pierre-Yves Ritschard and Alex Petrov. #512, #727
+ * collectd: Numerous spelling mistakes have been corrected in comments
+ and documentation and several error messages have been improved.
+ Thanks to Ruben Kerkhof, Abhinav Upadhyay, Olivier Bazoud,
+ Pierre-Yves Ritschard, Tim Smith, Moshe Zada, Katelyn Perry and Marc
+ Fournier.
+ * collectd: Rules/Targets can now be appended to existing Filter
+ Chains. Thanks to Marc Falzon. #444
+ * collectd: Support for process signaling and management by upstart
+ and systemd has been implemented for the Linux platform. Thanks to
+ Pierre-Yves Ritschard and Marc Fournier. #798, #811, #814
+ * collectd: The "CollectInternalStats" option has been added. Thanks
+ to Yves Mettier. #691
+ * collectd: The daemon source code and dependencies have moved to the
+ "src/daemon/" directory. Thanks to Florian Forster.
+ * collectd: The new "MaxReadInterval" option allows to cap the
+ exponential retry interval of plugins read errors. Thanks to Alexey
+ Remizov and Florian Forster. #713
+ * collectd: The "-P" command-line option now has precedence over the
+ "PIDFile" option. Thanks to Thomas D. #553
+ * collection.cgi: Various data-source related adjustments have been
+ made. Thanks to Fabiano Pires and Sebastian Harl.
+ * libcollectdclient: Now propagates errors when signing / encrypting
+ network packets. Thanks to Florian Forster.
+ * Configuration: Support for unquoted IPv6 addresses has been added.
+ Thanks to Sebastian Harl. #489
+ * Documentation: Various improvements have been done. Thanks to
+ Florian Forster and Marc Fournier.
+ * Examples: the sample C plugin has been updated to the current plugin
+ API. Thanks to Sebastian Harl.
+ * Licensing: The following components have been relicensed to the MIT
+ license: the Apple_Sensors, Ascent, DBI, E-Mail, Entropy,
+ GenericJMX, gmond, Java, LogFile, nginx, Notify_Desktop, NTPd, NUT,
+ olsrd, Perl, Ping, PostgreSQL, Protocols, RouterOS, RRDCacheD, SNMP,
+ StatsD, SysLog, Table, Tail, UnixSock, vmem, VServer, Wireless,
+ Write_Riemann and XMMS plugins, the core collectd daemon, the
+ collectdmon, collectd-nagios and collectd-tg utilities, all the
+ Targets and Matches, liboconfig, most of the "utils_*" files and the
+ plugin API.
+ * Tests: A test suite has been added. Thanks to Florian Forster.
+ * Threshold: The hysteresis calculation has been made more reliable.
+ Thanks to Jan Kundrát. #581
+ * Threshold: Various fixes and improvements have been made. Thanks to
+ Manuel Luis Sanmartín Rozada. #649, #644
+ * AMQP plugin: The "ConnectionRetryDelay" option has been added,
+ allowing to delay reconnection. Thanks to Yoga Ramalingam and Marc
+ Fournier. #833
+ * AMQP plugin: The "QueueDurable" and "QueueAutoDelete" options have
+ been added, giving control over queue creation and deletion. Thanks
+ to David Blundell and Marc Fournier. #623
+ * Apache, Ascent, BIND, cURL, cURL-JSON, cURL-XML, nginx and Write
+ HTTP plugins: Customizing the "User-Agent" field is now possible at
+ compile-time. Thanks to Jeremy Katz. #440
+ * Apache, Ascent, BIND, cURL, cURL-JSON, cURL-XML, nginx plugins: The
+ connection will be reset if it hasn't completed within the
+ configured "Interval". The new "Timeout" option gives control over
+ this behavior. Thanks to Jan Kundrát and Marc Fournier. #982, #983,
+ #993
+ * Apache, Ascent, cURL, cURL-JSON, cURL-XML, nginx, Write_HTTP
+ plugins: Allow usernames and passwords to contain colons if built
+ against libcurl ≧ 7.19.1. Thanks to Marc Fournier. #695, #947
+ * Apache plugin: The "SSLCiphers" option gives control over the
+ encryption algorithms to use with TLS connections. Thanks to Toni
+ Moreno. #946
+ * Barometer plugin: This new plugin reads sensor data from various
+ Freescale and Bosch digital barometers. Thanks to Tomas Menzl. #69,
+ #693
+ * Battery plugin: Reporting values as percentages and reporting
+ degraded batteries has been added. Thanks to Florian Forster.
+ * Battery plugin: Support for reading values from sysfs on Linux has
+ been added. Thanks to Andy Parkins, Nicholas Humfrey, Peter Wu and
+ Florian Forster. #725, #810, #998
+ * Battery plugin: The value for current is no longer supplied unless
+ the battery provides this information. Thanks to Florian Forster.
+ * BIND plugin: Bind's XML v3 API is now supported; Thanks to Victor
+ Berger, Bruno Prémont and Michal Humpula. #742, #847
+ * Ceph plugin: This new plugin collects statistics from the Ceph
+ distributed storage system. Thanks to Dan Ryder, Dennis Zou, Colin
+ McCabe, Sage Weil. #522, #598
+ * ConnTrack plugin: Support for reporting values as percentages as
+ well as legacy conntrack files in "/proc" has been added. Thanks to
+ Pierre-Yves Ritschard. #497, #680
+ * CPU plugin: The plugin is now able to report values as percentages
+ and aggregate values per-state and per-CPU. Thanks to Pierre-Yves
+ Ritschard, Florian Forster, Fabien Wernli, Nicholas Humfrey and
+ Wilfried Goesgens. #499, #516, #639 #734, #812, #802
+ * cURL-JSON plugin: Extracting values from complex JSON structures has
+ been enhanced. Thanks to Jim Radford. #408, #411
+ * cURL-JSON plugin: Intervals can now be configured on a per-URL
+ basis. Thanks to Stan Sawa. #685
+ * cURL-JSON, cURL-XML, Write_HTTP plugins: These plugins now also
+ follow HTTP redirects. Thanks to Marc Fournier.
+ * cURL, cURL-JSON, cURL-XML plugins: HTTP Digest authentication has
+ been implemented. Thanks to Frank Cornelis. #482
+ * DBI, Oracle, PostgreSQL plugins: A "MetadataFrom" parameter has been
+ added which allows to set metadata from database columns. Thanks to
+ Mark Wong. #317, #321
+ * DBI plugin: Querying several databases in parallel is now possible.
+ Thanks to Vincent Bernat. #453
+ * Disk plugin: On the Linux platform, disk names can now get looked up
+ in udev with the "UdevNameAttr" option. Thanks to Patrick Mooney.
+ #537
+ * Disk plugin: This plugin now collects several additional I/O-related
+ metrics on the Linux platform. Thanks to Florian Forster and Michael
+ Schenck. #705, #759
+ * DRBD plugin: This new plugin reads Linux's Distributed Replicated
+ Block Device (DRBD) statistics. Thanks to Tim Laszlo. #566, #700
+ * Exec, UnixSock plugins: The "PUTNOTIF" command now allows to set
+ metadata on notifications. Thanks to John-John Tedro. #416
+ * fhcount plugin: This new plugin reports the number of used file
+ handles. Thanks to Jiri Tyr. #1009
+ * GenericJMX plugin: A Class Loader for "JMXConnectorFactory" has been
+ added, allowing the plugin to work with JBOSS > 7. Thanks to
+ Alexandre Moutot. #452
+ * IPC plugin: This new plugin collects information related to shared
+ memory. Thanks to Andrés J. Díaz. #925
+ * Java plugin: Now uses the hostname defined in the configuration
+ file. Thanks to Pierre-Yves Ritschard. #530, #681
+ * Load plugin: The plugin is now able to report values as percentages.
+ Thanks to Vedran Bartonicek and Pierre-Yves Ritschard. #344, #498
+ * Log Logstash plugin: This new plugin writes collectd logs and events
+ as Logstash JSON formatted events. Thanks to Pierre-Yves Ritschard.
+ #360
+ * LVM plugin: The plugin collects thin pool data volumes size, and no
+ longer reports virtual volumes. Thanks to Benjamin Gilbert. #603
+ * memcached plugin: "listen_disabled_num" are now also reported.
+ Thanks to Matt Cottingham. #622
+ * Memory plugin: Slab memory reporting on the Linux platform has been
+ added. Thanks to Manuel CISSÉ and Marc Fournier. #560, #697
+ * Memory plugin: The plugin is now able to report values as
+ percentages. Thanks to Jeremy Katz, Florian Forster and Manuel
+ CISSÉ. #501, #511, #559
+ * Modbus plugin: Selecting between holding and input registers is now
+ possible. Thanks to Jan Vitek. #338
+ * Modbus plugin: Support for accessing devices through an RS-485
+ serial port has been added. Thanks to Eric Sandeen.
+ * Multimeter plugin: This plugin isn't built by default on the AIX
+ platform anymore. Thanks to Manuel Luis Sanmartin Rozada. #549, #684
+ * MySQL and PostgreSQL plugins: Passing "127.0.0.1" as a host will now
+ result in the global Hostname being used in metric names. Thanks to
+ Jeremy Katz. #441
+ * MySQL plugin: InnoDB, Select and Sort statistics collection has been
+ added. Thanks to Wilson Felipe, Marek Becka and Pierre-Yves
+ Ritschard. #248, #621, #699, #824
+ * MySQL plugin: The "Alias" and "ConnectTimeout" options have been
+ added. Thanks to William Tisäter.
+ * Netlink plugin: Support for 64bit netlink counters has been added.
+ Thanks to Marek Becka. #435
+ * Network plugin: The "ReconnectInterval" configuration option has
+ been added. Thanks to John Ferlito. #732
+ * NFS plugin: Support for NFSv4.0 has been implemented. Thanks to
+ Marek Becka. #550
+ * OneWire plugin: Support for more temperature-providing sensor
+ families has been added. Thanks to Tomasz Torcz. #672
+ * OneWire plugin: Support for full OWFS path and more device families
+ has been implemented. Thanks to Tomas Menzl. #68
+ * OpenLDAP plugin: This new plugin reads monitoring information from
+ OpenLDAP's "cn=Monitor" subtree. Thanks to Kimo Rosenbaum, Marc
+ Fournier and Nicholas Humfrey. #719
+ * OpenVPN plugin: Support for OpenVPN 2.3.0 has been implemented.
+ Thanks to Ed Okerson. #252
+ * OpenVZ plugin: Various improvements have been made, making the
+ plugin report values like the other collectd plugins do. Thanks to
+ Chris Lundquist. #264
+ * Perl plugin: A new "listval_filter" method has been added, various
+ internal cleanups and improvements have been made and a test suite
+ has been added. Thanks to Matthias Bethke. #728
+ * PostgreSQL plugin: The new "ExpireDelay" option allows skipping
+ older values pending write when the database slows down. Thanks to
+ Stephen O'Dor. #593
+ * PowerDNS plugin: The plugin was updated for stats from pdns 3.4.3.
+ Thanks to Ruben Kerkhof. #965
+ * Processes plugin: A memory-usage related optimization for
+ low-profile systems has been added. Thanks to Florian Forster. #652
+ * Python plugin: Support for Python3 has been improved, "ModulePath"
+ is now prepended to "sys.path", and the "get_dataset()" function has
+ been added to the Python API. Thanks to Sven Trenkel and Patrick
+ Browne. #890, #751, #771
+ * Redis and Write_Redis plugins: The support library has been switched
+ from credis to hiredis. Thanks to Andrés J. Díaz, Victor Seva,
+ Marc Fournier, Johan Bergström and Michael Spiegle. #296, #464,
+ #475, #799
+ * Redis plugin: Custom commands can now be used to fetch values stored
+ in Redis. Thanks to Pierre-Yves Ritschard. #816
+ * Redis plugin: Support for passwords up to 512 characters long has
+ been added. Thanks to Jeremy Katz. #532
+ * Sensors plugin: Support for lm_sensors' power sensors has been
+ added. Thanks to Jan Kundrát. #571
+ * SMART plugin: This new plugin collects SMART statistics from disk
+ drives. Thanks to Vincent Bernat. #797
+ * SNMP plugin: A blacklist/whitelist feature can now be used to filter
+ which OIDs to collect. Thanks to Christophe Courtaut. #414
+ * SNMP plugin: SNMPv3 authentication and encryption support has been
+ implemented. Thanks to Michael Pilat. #362
+ * SNMP plugin: Two error messages have been disambiguated. Thanks to
+ Sergey. #939, #952
+ * Swap plugin: The plugin is now able to report values as percentages.
+ Thanks to Jeremy Katz and Florian Forster. #500, #510
+ * Swap plugin: The plugin no longer fails on Linux systems where
+ "SwapCached" isn't exposed by the kernel. Thanks to Florian Forster.
+ #733
+ * Tail plugin: "GaugeInc" and "GaugeAdd" options have been
+ implemented. Thanks to Andre Ferraz. #673
+ * Tail plugin: Intervals can now be configured on a per-File basis.
+ Thanks to Tom Leaman. #446
+ * TCPConns plugin: The "AllPortsSummary" option, allowing to summarize
+ all connections, has been added. Thanks to Marek Becka. #488
+ * TCPConns plugin: Three metrics were renamed on the AIX platform, for
+ the sake of consistency. Thanks to Manuel Luis Sanmartín Rozada.
+ #546
+ * Turbostat plugin: This new plugin reads CPU frequency and C-state
+ residency on modern Intel turbo-capable processors. Thanks to
+ Vincent Brillault, Jean Delvare and Nicolas Iooss. #651
+ * UnixSock plugin: The "GETTHRESHOLD" command has been re-added.
+ Thanks to Manuel Luis Sanmartín Rozada. #674
+ * Varnish plugin: Varnish 4 support has been added, as well as as
+ monitoring metrics only available in Varnish 4. Thanks to Marc
+ Fournier. #618, #783
+ * Virt plugin: Guests memory usage is now also collected. Thanks to
+ Tiago Carvalho, jazzmes and Zollner Robert.
+ * Virt plugin: It is now possible to chose between using guests' name
+ or UUID as plugin_instance. Thanks to Remi Ferrand. #385
+ * Virt plugin: The libvirt plugin has been renamed to virt. Thanks to
+ Florian Forster.
+ * Write Graphite plugin: When the connection to graphite fails,
+ reconnection attempts are now limited to once per second. Thanks to
+ Florian Forster. #625
+ * Write HTTP plugin: Multi-instance support of this plugin has been
+ improved. The "<URL "url">" block has been deprecated in favor of
+ "<Node "identifier">". Thanks to Marc Fournier. #902
+ * Write HTTP plugin: Several TLS-related configuration options have
+ been added. Thanks to Ingmar Runge. #666
+ * Write HTTP plugin: The "LowSpeedLimit" and "Timeout" options allow
+ to reset slow/stalled network connections. Thanks to loginator17 and
+ Marc Fournier. #752, #985
+ * Write HTTP plugin: The size of the payload posted to the HTTP server
+ can now be controlled with the "BufferSize" option. Thanks to
+ Florian Forster. #722
+ * Write Kafka plugin: This new plugin sends data to Apache Kafka, a
+ distributed messaging queue. Thanks to Pierre-Yves Ritschard,
+ ciomaire, Vincent Bernat, Marc Fournier. #670, #694, #794, #853,
+ #014
+ * Write Log plugin: This new plugin dispatches collected values to the
+ configured log destination(s). Thanks to Pierre-Yves Ritschard. #886
+ * Write Riemann plugin: Extra meta strings are now added as attributes
+ in notifications. Thanks to John-John Tedro. #417
+ * Write Riemann plugin: Notification message are now sent to the
+ Riemann server via the description field. Thanks to Adrian Miron.
+ #575
+ * Write Riemann plugin: Support for custom attributes has been added.
+ Thanks to Pierre-Yves Ritschard. #459
+ * Write Riemann plugin: Support had been implemented for sending
+ events to Riemann in batches (when using TCP), and is enabled by
+ default. Thanks to Pierre-Yves Ritschard. #800
+ * Write Riemann plugin: The "EventServicePrefix" option has been
+ added, which adds a prefix to event service names. Thanks to Moshe
+ Zada. #706
+ * Write Riemann plugin: Threshold checks can now be passed down to the
+ Riemann server. Thanks to Pierre-Yves Ritschard. #518
+ * Write Sensu plugin: This new plugin submits values to Sensu, a
+ stream processing and monitoring system. Thanks to Fabrice A. Marie
+ and Marc Fournier. #912, #1001, #1016
+ * Write TSDB plugin: This new plugin sends data to OpenTSDB, a
+ scalable time series database. Thanks to Kevin Bowling, Florian
+ Forster, Dallin Young, Michael Schenck and Pierre-Yves Ritschard.
+ #703, #772, #945
+ * ZFS ARC plugin: Support for ZFS-on-Linux has been added. Thanks to
+ Marc Fournier and Wilfried Goesgens. #552
+ * Zookeeper plugin: This new plugin reads data from the Apache
+ Zookeeper "MNTR" command. Thanks to Jeremy Katz. #826
+
2015-02-26, Version 5.4.2
* Build system: Numerous fixes. Thanks to Bjørn Nordbø, Jim Radford,
KOMEDA Shinji, Lauri Tirkkonen, Manuel Luis Sanmartin Rozada, Marc