ChangeLog: Added an entry about the ability to configure Perl plugins.

[collectd.git] / ChangeLog

2008-08-24, Version 4.5.0
        * collectd: Added the ability to flush certain identifiers.
        * collectd: The concept of `notification meta data' has been
          introduced.
        * filecount plugin: The new filecount plugin counts the number of
          files in a directory and its subdirectories.
        * ipmi plugin: Sensor names have been changed to ensure unique names.
          Notifications upon added and removed sensors can now be generated.
        * notify_desktop plugin: This new plugin sends notifications to the
          X desktop using the structure defined in the `Desktop Notification
          Specification'.
        * notify_email plugin: This new plugin sends out notifications via
          email, using the `esmtp' library.
        * onewire plugin: The new experimental(!) onewire plugin reads values,
          such as temperatures, from sensors connected to the computer via the
          onewire bus.
        * perl plugin: Improved synchronized access to internal data structures
          and fixed a possible dead-lock.
        * perl plugin: Added the ability to flush certain identifiers and marked
          plugin_flush_all() and plugin_flush_one() as deprecated in favor of
          plugin_flush().
        * perl plugin: Added the ability to configure Perl plugins.
        * postgresql plugin: The new postgresql plugin collects statistics
          about or from a PostgreSQL database.
        * processes plugin: The `ProcessMatch' option has been added.
        * rrdtool plugin: Implement throttling of the `update queue' to lessen
          IO load.
        * tcpconns plugin: This plugin has been ported to OpenBSD.
        * thermal plugin: The new thermal plugin collects system temperatures
          using Linux ACPI thermal zone data.

2008-07-15, Version 4.4.2
        * build system: Use pkg-config to detect the upsclient library.
        * collectd: Try even harder to determine the endianess of the
          architecture collectd is being built on.
        * disk plugin: Fix for Linux 2.4: A wrong field was used as the name
          of disks.
        * dns plugin: Fix compilation errors with BIND versions 19991001
          through 19991005.
        * network plugin: Bugfix in the init routine: The init function
          cleared a buffer regardless of its contents. This could lead to lost
          values under Solaris.
        * nginx plugin: Remove usage of the thread-unsafe `strtok' function.
        * vserver plugin: Remove usage of the thread-unsafe `readdir'
          function.
        * wireless plugin: Work around incorrect noise and power values
          returned by some broken drivers.

2008-06-03, Version 4.4.1
        * collectd: Fix the `DataSource' option within `Type' blocks. Thanks
          to kyrone for reporting this.
        * collectd: Fixed min/max output in notifications generated by
          threshold checking.
        * collectd-nagios: Fix the protocol used to communicate with the
          daemon.
        * perl plugin: Fail noisily, but don't shutdown the daemon, if
          initialization has errors. An issue with Perl 5.10 has been fixed.
        * teamspeak2 plugin: Fixed an out of bounce array access. Thanks to
          René Rebe and Siegmund Gorr for reporting this.

2008-05-06, Version 4.4.0
        * collectd: Internal code cleanups.
        * collectd: Added support for a `Flush' command in the unixsock and
          exec plugins. This command can be used to force a plugin (or all) to
          flush its values to disk.
        * collectd: Thresholds can now be configured to apply to one data
          source only, making it possible to configure different thresholds
          for each data source.
        * apache, nginx plugins: Added the possibility to disable host and/or
          peer verification.
        * ascent plugin: The new ascent plugin reads and parses the statistics
          page of an Ascent server.
        * cpu plugin: Support for the statgrab library has been added.
        * disk plugin: The possibility to ignore certain disks or collect only
          specific disks has been added.
        * disk plugin: Support for the statgrab library has been added.
        * ipmi plugin: The new ipmi plugin uses the OpenIPMI library to read
          sensor values via IPMI, the intelligent platform management
          interface.
        * iptables plugin: The iptc library that is used by the iptables
          plugin has been added to the distribution, because it is not
          provided by all distributions and removed from at least one.
        * powerdns plugin: The new powerdns plugin reads statistics from an
          authoritative or a recursing PowerDNS name server.
        * rrdtool plugin: The size of the files generated with the default
          configuration has been decreased.
        * tail plugin: The new tail plugin can be used to gather statistics by
          continuously reading from log files.
        * teamspeak2 plugin: The new teamspeak2 plugin connects to a
          TeamSpeak2 server and collects statistics about the number of users
          and number of channels.
        * users plugin: Support for the statgrab library has been added.
        * vmem plugin: The new vmem plugin collects very detailed statistics
          about the virtual memory subsystem of Linux.

2008-04-22, Version 4.3.3
        * build system: Improved detection of several libraries, especially if
          they are in non-standard paths.
        * build system: Portability fixes: Automatically define "_REENTRANT"
          if the libc expects it.
        * collectd: Error and warning messages have been improved.
        * collectd: Check for the BYTE_ORDER and BIG_ENDIAN defines before
          using them.
        * apache plugin: Allocate new memory when reading a webpage instead of
          using a buffer of static size.
        * exec plugin: Close (almost) all filedescriptors before exec(2)ing
          the program.
        * hddtemp plugin: Error and warning messages have been improved.
        * sensors plugin: Fix sensor collection for some chip types.

2008-03-29, Version 4.3.2
        * collectd: Fix configuration of the `FailureMax', `WarningMax', and
          `Persist' threshold options.
        * collectd: Fix handling of missing values in the global value cache.
        * collectd: Improved error messages when parsing the configuration.
        * sensors plugin: Fix temperature collection with libsensors4.
        * unixsock plugin: Fix mixed input and output operation on streams.
        * wireless plugin: Fix reading noise value.

2008-03-05, Version 4.3.1
        * exec plugin: Set supplementary group IDs.
        * network plugin:
          + Use `memcpy' when constructing/parsing a package to avoid
            alignment problems on weird architectures, such as Sparc.
          + Translate doubles to/from the x86 byte representation to ensure
            cross-platform compatibility.
        * ping plugin: Correct the handling of the `TTL' setting.
        * swap plugin: Reapply a patch for Solaris.
        * tcpconns plugin: Portability improvements.

2008-02-18, Version 4.3.0
        * collectd: Notifications have been added to the daemon. Notifications
          are status messages that may be associated with a data instance.
        * collectd: Threshold checking has been added to the daemon. This
          means that you can configure threshold values for each data
          instance. If this threshold is exceeded a notification will be
          created.
        * collectd: The new `FQDNLookup' option tells the daemon to use the
          full qualified domain name as the hostname, not just the host part
          es returned by `gethostname(2)'.
        * collectd: Support for more than one `TypesDB' file has been added.
          This is useful when one such file is included in a package but one
          wants to add custom type definitions.
        * collectd: The `Include' config option has been expanded to handle
          entire directories and shell wildcards.
        * collectdmon: The new `collectdmon' binary detects when collectd
          terminates and automatically restarts it again.
        * csv plugin: The CSV plugin is now able to store counter values as a
          rate, using the `StoreRates' configuration option.
        * exec plugin: Handling of notifications has been added and the
          ability to pass arguments to the executed programs has been added.
        * hddtemp plugin: The new `TranslateDevicename' option lets you
          disable the translation from device names to major-minor-numbers.
        * logfile plugin: Handling of notifications has been added.
        * ntpd plugin: The new `ReverseLookups' can be used to disable reverse
          domain name lookups in this plugin.
        * perl plugin: Many internal changes added support for handling multiple
          threads making the plugin reasonably usable inside collectd. The API has
          been extended to support notifications and export global variables to
          Perl plugins; callbacks now have to be identified by name rather than a
          pointer to a subroutine. The plugin is no longer experimental.
        * uuid plugin: The new UUID plugin sets the hostname to an unique
          identifier for this host. This is meant for setups where each client
          may migrate to another physical host, possibly going through one or
          more name changes in the process. Thanks to Richard Jones from
          Red Hat's Emerging Technology group for this plugin.
        * libvirt: The new libvirt plugin uses the `libvirt' library to query
          CPU, disk and network statistics about guest systems on the same
          physical server. Thanks to Richard Jones from Red Hat's Emerging
          Technology group for this plugin.

2008-04-22, Version 4.2.7
        * build system: Improved detection of several libraries, especially if
          they are in non-standard paths.
        * build system: Portability fixes: Automatically define "_REENTRANT"
          if the libc expects it.
        * collectd: Error and warning messages have been improved.
        * collectd: Check for the BYTE_ORDER and BIG_ENDIAN defines before
          using them.
        * apache plugin: Allocate new memory when reading a webpage instead of
          using a buffer of static size.
        * exec plugin: Close (almost) all filedescriptors before exec(2)ing
          the program.
        * hddtemp plugin: Error and warning messages have been improved.
        * sensors plugin: Fix sensor collection for some chip types.

2008-03-29, Version 4.2.6
        * collectd: Improved error messages when parsing the configuration.
        * sensors plugin: Fix temperature collection with libsensors4.
        * unixsock plugin: Fix mixed input and output operation on streams.
        * wireless plugin: Fix reading noise value.

2008-03-04, Version 4.2.5
        * apache plugin: Improved initialization and error messages.
        * exec plugin: Set supplementary group IDs.
        * network plugin:
          + Create separate threads for reading from the socket and parsing
            and dispatching incoming packets. Versions prior to this may have
            problems in high-load situations, where the socket receive buffers
            overflows, resulting in gaps in the data.
          + Use `memcpy' when constructing/parsing a package to avoid
            alignment problems on weird architectures, such as Sparc.
          + Translate doubles to/from the x86 byte representation to ensure
            cross-platform compatibility.
        * ping plugin: Correct the handling of the `TTL' setting.
        * rrdtool plugin: Ensure correct handling of the `RRATimespan' option.
        * swap plugin: Reapply a patch for Solaris.
        * tcpconns plugin: Portability improvements.

2008-01-21, Version 4.2.4
        * unixsock plugin: A bug in the unixsock plugin caused it not to set
          the permission on the socket as documented in the manpage. Thanks to
          Evgeny Chukreev for fixing this issue.
        * collectd: The documentation has been improved.

2007-12-28, Version 4.2.3
        * sensors plugin: Updated the plugin to build and work with version 3
          of the libsensors library.

2007-12-15, Version 4.2.2
        * nginx plugin: Incorrect comparison of strings lead to a segfault
          when using the plugin. Thanks to Saulius Grigaliunas for fixing
          this.
        * logfile plugin: The config option `Timestamp' was handled
          incorrectly and basically always active. Thanks to Luke Heberling
          for fixing this.

2007-11-08, Version 4.2.1
        * tcpconns plugin: Don't complain about a missing file if IPv6 is not
          enabled on the host.
        * snmp plugin: Fix a memory leak.

2007-10-27, Version 4.2.0
        * collectd: The new config option `Include' lets you include other
          configfiles and thus split up your config into smaller parts. This
          may be especially interesting for the snmp plugin to keep the data
          definitions separate from the host definitions.
        * ipvs plugin: The new `ipvs' plugin collects IPVS connection statistics
          (number of connections, octets and packets for each service and
          destination). Thanks to Sebastian Harl for this plugin.
        * memcached plugin: The new `memcached' plugin connects to a memcached
          daemon process and collects statistics of this distributed caching
          system. Thanks to Antony Dovgal for contributing this plugin.
        * nginx plugin: The new `nginx' plugin reads the status page of an
          nginx daemon and saves the handled connections and requests.
        * perl plugin: Many changes, including the added `EnableDebugger'
          config option which lets you debug your Perl plugins more easily.
        * rrdtool plugin: Use the thread-safe RRD-library if available. Try to
          be more thread-safe otherwise by locking calls to the library.
        * snmp plugin: Added the options `Scale' and `Shift' to Data-blocks to
          correct the values returned by SNMP-agents. If a <data> block is
          defined as `table' the instance is now optional. The sequence number
          is used as the type-instance in this case. The new `InstancePrefix'
          option allows to add arbitrary prefixes to the type-instance.
        * tcpconns plugin: The new `tcpconns' plugin collects the number of
          certain TCP connections and what state they're in. This can be used
          to see how many connections your FTP server has to handle or how
          many outgoing connections your mailserver has open.

2008-01-11, Version 4.1.6
        * unixsock plugin: A bug in the unixsock plugin caused it not to set
          the permission on the socket as documented in the manpage. Thanks to
          Evgeny Chukreev for fixing this issue.
        * collectd: The documentation has been improved.

2007-12-27, Version 4.1.5
        * rrdtool plugin: Fix a memory leak that only occurred in very-low-
          memory situations.
        * sensors plugin: Updated the plugin to build and work with version 3
          of the libsensors library.

2007-11-08, Version 4.1.4
        * Build system: Improve detection of the rrd library, especially if
          it's in a non-standard location.
        * Build system: A bug when parsing the argument for
          `--with-libnetsnmp' has been fixed.
        * collectd: Implement `strerror_r' if the libc doesn't provide it.
        * rrdtool plugin: Fix a bug in the shutdown sequence that might cause
          a deadlock or delay when shutting down the daemon.
        * snmp plugin: Fix a memory leak.

2007-10-24, Version 4.1.3
        * collectd: A build issue under Solaris has been resolved by renaming
          data types.
        * rrdtool plugin: Use the thread-safe RRD-library if available. Try to
          be more thread-safe otherwise by locking calls to the library.

2007-09-28, Version 4.1.2
        * apcups plugin: Fix reporting of the `load percent' data.
        * wireless plugin: Correct the handling of cards returning signal and
          noise quality as percentage.
        * perl plugin: Fix a possible buffer overflow in get_module_name().
        * build system: Further improve the detection of libraries.
        * netlink plugin: Build issues under some older versions of the Linux
          includes (i. e. Debian Sarge) have been fixed.
        * snmp plugin: Fix a potential segfault when a host times out. Add
          support for the `timeticks' type. 

2007-09-12, Version 4.1.1
        * Build system: The detection of `libnetlink' has been improved.
        * collectd: The documentation has been fixed in numerous places.
        * exec plugin: Setting the group under which to run a program has been
          fixed.
        * collectd: The `sstrerror' function was improved to work correctly
          with the broken GNU version of `strerror_r'.
        * collectd: Write an error message to STDERR when loading of a plugin
          fails.
        * apcups plugin: Fix the `types' used to submit the values: They still
          has an `apcups_' prefix which doesn't work anymore.
        * rrdtool plugin: Create new RRD-files with the `begin' time set to
          whatever the client thinks is `now'..

2007-09-01, Version 4.1.0
        * Build system: The build system has been changed to automatically
          disable all plugins, which are missing dependencies. The dependency
          checking has been removed from the plugins themselves to remove
          redundancy.
        * Flexible interval: The interval of collected data is now sent along
          with the data itself over the network, so that the interval-settings
          of server and clients no longer needs to match.
        * netlink plugin: The new `netlink' plugin connects to the Linux
          kernel using a netlink socket and uses it to query information about
          interfaces, qdiscs and classes.
        * rrdtool plugin: The cache is now dumped to disk in an extra thread
          to not block data collection.
        * snmp plugin: The new `snmp' plugin can read values from SNMP enabled
          network devices, such as switches, routers, thermometers, rack
          monitoring servers, etc. The collectd-snmp(5) manpage documents this
          plugin.
        * unixsock plugin: Added the `LISTVAL' command.
        * xmms plugin: The new `xmms' plugin graphs the bitrate and frequency
          of music played with xmms.

2007-09-28, Version 4.0.9
        * apcups plugin: Fix reporting of the `load percent' data.
        * wireless plugin: Correct the handling of cards returning signal and
          noise quality as percentage.
        * perl plugin: Fix a possible buffer overflow in get_module_name().

2007-09-12, Version 4.0.8
        * collectd: The `sstrerror' function was improved to work correctly
          with the broken GNU version of `strerror_r'.
        * collectd: Write an error message to STDERR when loading of a plugin
          fails.
        * apcups plugin: Fix the `types' used to submit the values: They still
          has an `apcups_' prefix which doesn't work anymore.
        * rrdtool plugin: Create new RRD-files with the `begin' time set to
          whatever the client thinks is `now'..

2007-08-26, Version 4.0.7
        * documentation: Some typos have been fixed and some information has
          been improved.
        * build system: Many fixes for detecting libraries in unusual places,
          such as on RedHat systems. The affected libraries are `libcurl',
          `libmysql', and `libupsclient'.
        * network plugin: Allow the `Port' option to be specified as a number
          (i. e. without quotes).
        * nut plugin: A fix allows linking the nut plugin against
          libupsclient, version >= 2.2.0.
        * processes plugin: Fix a potential segmentation fault.

2007-07-30, Version 4.0.6
        * sensors plugin: Fix the ignorelist functionality: Only the `type
          instance' was used to match against the list, but the documentation
          told otherwise. This release fixes the code, so it complies with the
          documentation.
        * syslog plugin: Call `openlog' right when the plugin is loaded, so
          configuration messages will end up in the logging facility.
        * conrtib/fedora: The contributed specfile for Fedora has been
          updated.

2007-07-05, Version 4.0.5
        * Portability: More fixes for OpenBSD have been included.

2007-06-24, Version 4.0.4
        * cpu plugin: Fixed the Solaris code.
        * dns plugin: Fixed a build issue for OpenBSD.
        * interface plugin: Fixed the Solaris code.
        * load plugin: Fixed the alternative `/proc' Linux code.
        * memory plugin: Fixed the Solaris code.
        * oconfig: Don't require `-lfl' anymore.

2007-06-19, Version 4.0.3
        * cpu plugin: Fix the Darwin / Mac OS X code.
        * ping plugin: Use the return value of `getpid', not its address.
        * csv, rrdtool plugin: Fixed a bug that prevented an buffer to be
          initialized correctly.
        * configure: Added `--with-nan-emulation' to aid cross compilation.

2007-06-12, Version 4.0.2
        * hddtemp and ntpd plugin: Corrected the parsing of port numbers when
          they're given in numerically form.

2007-06-07, Version 4.0.1
        * iptables plugin: A bug in the configuration routine has been fixed.
          Setting a comment in the configfile will no longer cause a
          segmentation fault.

2007-06-03, Version 4.0.0
        * collectd: The plugin-infrastructure has been changed to allow for
          more types of plugins, namely `write' and `log' plugins.
        * collectd: The read-function has been changed to read many plugins in
          parallel, using threads. Thus, plugins generally need to use
          thread-safe functions from now on.
        * collectd: The '-t' command line options allows to perform syntax tests
          of the configuration file and exit immediately.
        * csv plugin: The new `csv' plugin handles output to `comma separated
          values'-files.
        * rrdtool plugin: The new `rrdtool' plugin handles output to
          RRD-files. Data can be cached to combine multiple updates into one
          write to increase IO-performance.
        * network plugin: The new `network' plugin handles IO via the network.
          It implements a different, much more extensible protocol which can
          combine many values in one packet, decreasing the number of UDP-
          packets being sent. It can read from and send to the network and
          with the appropriate configuration even forward packets to other
          networks.
        * unixsock plugin: The new `unixsock' plugin provides an interface to
          communicate with the daemon while it is running. Right now the
          commands `GETVAL' and `PUTVAL' are implemented, but more are to
          come.
        * perl plugin: The new `perl' plugin allows you to write extensions
          for collectd in the scripting-language Perl.
        * logfile plugin: The new `logfile' plugin writes logmessages to files
          or STDOUT or STDERR.
        * syslog plugin: The new `syslog' plugin sends logmessages to the
          system's syslog daemon.
        * entropy plugin: The new `entropy' plugin collects the amount of
          entropy currently being available to the system.
        * exec plugin: The new `exec' plugin forks child processes and reads
          back values provided by the forked processes.
        * iptables plugin: The new `iptables' plugin reads counters from
          iptables rules. Thanks to Sjoerd van der Berg for contributing this
          plugin.
        * irq plugin: The new `irq' plugin collects the IRQ-counters. Thanks
          to Peter Holik for contributing this plugin.
        * nut plugin: The new `nut' plugin connects the upsd of the `network
          ups tools' and reads information about the connected UPS.
        * apache plugin: Support for lighttpd's `BusyServers' (aka.
          connections) field was added by Florent Monbillard.
        * collectd-nagios: The new `collectd-nagios' binary queries values
          from collectd, parses them and exits according to Nagios-standards.
        * manpages: The manpages have been improved a lot.

2007-09-28, Version 3.11.7
        * wireless plugin: Correct the handling of cards returning signal and
          noise quality as percentage.

2007-08-31, Version 3.11.6
        * processes plugin: Fix a potential segmentation fault.

2007-05-29, Version 3.11.5
        * configure: Added `AC_SYS_LARGEFILE' for LFS.
        * ntpd plugin: Fix a potential buffer overflow.
        * processes plugin: Fix a bug when run under Linux 2.4. All processes
          were accounted as `zombies'.

2007-04-10, Version 3.11.4
        * dns plugin: Change the order of includes to make the plugin compile
          under FreeBSD.

2007-03-30, Version 3.11.3
        * configure: Have the configure-script define `HAVE_LIBKSTAT' instead
          of the unused `COLLECT_KSTAT'.

2007-02-11, Version 3.11.2
        * plugin: Catch NULL-pointer and try to fix them. Otherwise the
          NULL-pointer may have been passed to `printf' which causes a
          segfault with some libcs.

2007-02-10, Version 3.11.1
        * df plugin: Some wrong defines have been fixed so the plugin works
          under Solaris again.
        * dns plugin: The usage of a struct has been fixed to work with
          non-GNU libcs.
        * processes plugin: Some missing defines have been added so the plugin
          compiles cleanly under FreeBSD and presumably other UNIXes.

2006-12-22, Version 3.11.0
        * collectd: The new command line option `-P' makes it easier for
          distributors to change the location of PID-files.
        * collectd: The daemon shuts down faster now which makes it easier to
          write init.d-scripts for it.
        * apache plugin: Increase the buffersize to 16k, because the 4k buffer
          caused problems every now and then.
        * df plugin: New config options allow to ignore certain mountpoints,
          filesystem types or devices.
        * dns plugin: The new dns plugin uses `libpcap' to capture DNS traffic
          and interprets it. It collects traffic as well as qtype, opcode and
          rcode counts.
        * email plugin: Sebastian Harl has contributed this plugin which
          counts received mails in categories (e. g. ham, spam, virus), spam
          score (as given by SpamAssassin) and check types.
        * mbmon plugin: Flavio Stanchina has contributed this plugin which
          uses `mbmon' to gather information from sensors on the motherboard.
        * processes plugin: Collect detailed statistics for configured
          processes, that's process and thread count, CPU usage, resident
          segment size and pagefaults.
        * multimeter plugin: Peter Holik contributed a new plugin which
          queries multimeters.
        * sensors plugin: Lubos Stanek has put much effort into improving this
          plugin, including `extended naming', collection of voltage values
          and the possibility to ignore certain values.

2006-12-21, Version 3.10.4
        * Max Kellermann has identified a bug in the server routine: When
          opening a socket fails the daemon will (re)try opening the socket in
          an endless loop, ultimately leading to a `EMFILE' error.

2006-11-04, Version 3.10.3
        * Lubos Stanek has identified a bug in the ntpd-plugin: When the
          ntpd's reply was sent in more than one packet, the buffer size was
          calculated incorrectly, resulting in the reading of uninitialized or
          freed memory.

2006-11-01, Version 3.10.2
        * The sample config file has been improved.
        * Errors in the manpages have been corrected.
        * The ping-plugin now adds hosts during initialization, not during
          startup. This speeds up startup when no network connectivity is
          available. Also, the hosts are being added later when the network is
          available.
        * Improved BSD-support for the df-plugin.
        * Fixed syntax errors in the swap-plugin for Mac OS X.
        * Fix a wrong structure being passed to `getnameinfo' in the ntpd-
          plugin.
        * Don't disable the mysql-plugin if connecting to the database fails
          during initialization. Instead, try again in increasing intervals.

2006-07-19, Version 3.10.1
        * A bug in the apcups plugin was fixed: Is the plugin is loaded, but
          the apcups cannot be reached, unconnected sockets will pile up and
          eventually lead to `Too many open files' errors.

2006-07-09, Version 3.10.0
        * The `disk' plugin has been ported to Darwin.
        * The `battery' plugin should work on many Apple computers now.
        * The `traffic' plugin can now ignore certain interfaces. Also,
          statistics for sent/received packets and errors have been added.
        * A plugin to monitor APC UPSes using `apcupsd' has been added. Thanks
          to Anthony Gialluca for contributing this plugin and providing me
          with a test environment :)
        * A plugin for monitoring an NTP instance and the local clock drift
          has been added.

2006-06-25, Version 3.9.4
        * The Solaris code in the `swap' plugin has been changed to reflect
          the numbers returned by `swap -s'. Thanks to Christophe Kalt for
          working this out.
        * The debugging system has been fixed to work with the Sun libc.
        * When built without librrd the variable `operating_mode' could be
          uninitialized. Thanks to David Elliot for reporting the bug.

2006-06-01, Version 3.9.3
        * Fixed the ping-plugin under FreeBSD and Mac OS X. Potentially other
          operating systems also profit from the changes, but I wasn't able to
          check that.
        * Changed the build system to find the netinet-includes under FreeBSD
          and therefore successfully build the `liboping' library there.

2006-05-09, Version 3.9.2
        * Applied a patch to the `liboping' library. Due to a bug in the
          sequence checking the `ping' plugin stopped working after
          approximately 7.6 days.

2006-05-09, Version 3.8.5
        * Applied a patch to the `liboping' library. Due to a bug in the
          sequence checking the `ping' plugin stopped working after
          approximately 7.6 days.

2006-04-21, Version 3.9.1
        * Build issues with Solaris and possible other architectures have been
          resolved.
        * Problems when building the `apache'-plugin without `libcurl' have
          been resolved.
        * A bug in the `ping' plugin has been fixed. Sorry folks.

2006-04-02, Version 3.9.0
        * A plugin to monitor the Apache webserver has been added.
          <http://httpd.apache.org/>
        * A plugin to collect statistics about virtual servers using VServer.
          <http://linux-vserver.org/> Thanks to Sebastian Harl for writing
          this plugin :)
        * A plugin for wireless LAN cards has been added. It monitors signal
          strength, link quality and noise ratio..
        * A plugin for Apple hardware sensors has been added.
        * An option to compile collectd with different `step' and `heartbeat'
          settings has been added. The size of RRAs is no longer static but
          calculated based on the settings for `step' and `width'.
        * The `ping' plugin can now be configured to use a certain TTL.
        * A plugin to monitor the hardware sensors of Apple computers has been
          added.
        * The plugins `cpu', `memory', `processes' and `traffic' have been
          ported to Mach/Darwin (Mac OS X).
        * The `log mode' has been contributed by Christophe Kalt. It writes
          the data into text files rather than RRD files.

2006-04-09, Version 3.8.4
        * Applied patch by Vincent Stehlé which improves the disk-name
          resolution in the `hddtemp' plugin for Linux systems.

2006-04-02, Version 3.8.3
        * Applied a patch by James Byers: The MySQL plugin was not working
          with MySQL 5.0.2 or later.

2006-03-14, Version 3.8.2
        * `utils_mount.c' has been changed to not use the `MNTTAB' defined by
          the GNU libc, because it points to `/etc/fstab' rather than
          `/etc/mtab'.

2006-03-13, Version 3.8.1
        * Fixes for building collectd under FreeBSD, Mac OS X and Solaris.
        * Fixes in the debian `postinst' and `init.d' scripts.

2006-03-09, Version 3.8.0
        * The `ping' plugin no longer uses `libping' but a self written
          library named `liboping'. With this library it's possible to ping
          multiple IPv4 and IPv6 addresses and hostnames - in parallel.

2006-02-18, Version 3.7.2
        * A simple bug in the `battery' plugin has been fixed. It should now
          work with ACPI based batteries as well. Thanks to Sebastian for
          fixing this.
        * Fixing a bug that prevented collectd to be built without librrd.
          Thanks to Werner Heuser for reporting it.

2006-02-04, Version 3.7.1
        * The new network code has been improved to build with older versions
          of glibc.
        * Fix in `libping' sets the ICMP sequence on outgoing packets. Thanks
          to Tommie Gannert for this patch.

2006-01-30, Version 3.7.0
        * The `battery' plugin has been added. It collects information about
          laptop batteries..
        * The MySQL plugin has been improved: It now writes two more RRD
          files, `mysql_qcache.rrd' and `mysql_threads.rrd'.
        * The `cpufreq' plugin now reads another file since the file it did
          read so far causes much overhead in the kernel. Also, you need root
          to read the old file, but not to read the new one.
        * The `hddtemp' plugin can now be configured to connect to another
          address and/or port than localhost.
        * The `df' plugin now prefers `statvfs' over `statfs'.
        * The network code has been rewritten. collectd now supports unicast
          and multicast, and IPv4 and IPv6. Also, the TTL of sent packages can
          be set in the configfile.

2006-01-24, Version 3.6.2
        * Due to a bug in the configfile handling collectd wouldn't start in
          client mode. This released fixes this.

2006-01-20, Version 3.6.1
        * Due to a bug in `configure.in' all modules and the binary were
          linked against `libmysqlclient'. This issue is solved by this
          release.

2006-01-17, Version 3.6.0
        * A config file has been added. This allows for loading only specific
          plugins.
        * A `df' plugin has been added.
        * A `mysql' plugin has been added.
        * The `ping' plugin doesn't entirely give up hope when a socket error
          occurred, but will back of and increase the intervals between tries.

2006-01-21, Version 3.5.2
        * Fixed yet another bug in the signal handling.. Stupid typo..
        * Improved the ping plugin to not give up on socket errors (backport
          from 3.6.0).

2005-12-18, Version 3.5.1
        * The PID-file is now deleted correctly when shutting down the daemon.
        * SIGINT and SIGTERM are now handled correctly.

2005-12-16, Version 3.5.0 (Revision 326)
        * A bug in the `load' module under Solaris has been fixed.
        * The `users' module has been contributed by Sebastian Harl. It counts
          currently logged in users.
        * The CPU module now works under FreeBSD without the use of
          `libstatgrab', however SMP support is missing.
        * The default directories for the RRD files and the PID file now
          depend on the compile time setting of `localstatedir'.

2005-11-15, Version 3.4.0 (Revision 236)
        * A PID-file is written to /var/run upon startup. Thanks to `Tommie'
          from gentoo's bugzilla for writing the patch.
        * The build dependency for librrd has been removed. Binaries built
          without librrd are client-only and will multicast their value as
          with the `-c' argument.
        * A patch by Peter Holik adds a module for monitoring CPU frequencies.
        * The newly introduced `-f' switch prevents daemon initialization
          (forking, closing standard filehandles, etc.) Thanks to Alvaro
          Barcellos for this patch.

2005-11-04, Version 3.3.0 (Revision 216)
        * New modules have been added:
          - `serial', for monitoring traffic on the serial interfaces
          - `nfs', for graphing NFS procedure calls
          - `tape', traffic from/to tape devices
        * The memory.rrd now accepts more than 4Gig of memory.

2005-10-26, Version 3.2.0 (Revision 200)
        * Support for graphing the processes has been added (thanks to Lyonel
          Vincent)
        * If reading from hddtemp fails collectd will increase the time
          between polls up to one day.
        * The init.d files have been improved.
        * Problems with the spec file have been fixed.

2005-10-16, Version 3.1.0 (Revision 194)
        * Added the `setsid' syscall to the startup code.
        * Support for hddtemp has been added (thanks to Vincent Stehlé)

2005-09-30, Version 3.0.0 (Revision 184)
        * The ability to send/receive data to/from the network (think
          multicast) has been added.
        * Modules have been split up into shared libraries can be loaded at
          runtime. The biggest advantage is that the core program doesn't need
          to be linked against an external library.
        * A patch by George Kargiotakis has been applied: It fixes the sensors
          behaviour then more than one sensor is being queried.

2005-09-16, Version 2.1.0 (Revision 172)
        * A module for swap statistics has been added.

2005-09-09, Version 2.0.0 (Revision 135)
        * Filenames can no longer be configured at program startup. The only
          options as of this version are the directory and ping hosts.
        * CPU statistics now include Wait-IO. If provided under Linux IRQ and
          Soft-IRQ statistics are added to `System'. 
        * Diskstats now collect read and write bytes, not sectors.
        * Ping statistics can now be collected for more than one host. There
          is no default any more: If no host is given no host will be pinged.
        * A self-written patch for libping has been applied so it builds
          cleanly.

2005-09-01, Version 1.8.1 (Revision 123)
        * Much improved configure-script: libraries and features may now be
          disabled.
        * More detailed warnings/error messages when RRD update fails.

2005-08-29, Version 1.8.0:
        * Support for collecting disk statistics under Solaris.

2005-08-25, Version 1.7.0:
        * Support for libstatgrab[1] for load, memory usage and network
          traffic. CPU- and disk-usage are not (yet) supported, since
          libstatgrab returns insufficient information. I will contact the
          authors.
        * Improved the CPU-initialization code for Solaris. Apparently CPUs
          aren't necessarily counted linear which is now handled correctly.
        [1]: http://www.i-scream.org/libstatgrab/

2005-08-21, Version 1.6.0:
        * Basic support for Solaris: System load and cpu-usage can be
          collected under Solaris, too. Other stats will follow later.
        * Many fixes in the autoconf-script
        * Collection/Museum scripts have been added under contrib/museum
        * collectd may now be started in unprivileged mode, though ping
          statistics will not work.

2005-07-17, Version 1.5.1:
        * Diskstats-RRDs now use major/minor for naming. Some systems have
          weird strings as disk-names..

2005-07-17, Version 1.5:
        * A new module, diskstats, has been added. It collects information
          about the disks and partitions.

2005-07-11, Version 1.4.2:
        * The meminfo module has been changed to work with more platforms
          and/or kernel versions.

2005-07-10, Version 1.4.1: Correct traffic stats
        * The traffic rrd-file is now created with DS-type `COUNTER' which I
          forgot to correct when I changed that module.

2005-07-09, Version 1.4: More traffic stats
        * Traffic is now collected for all interfaces that can be found
        * Temperature-statistics are read from lm-sensors if available

2005-07-08, Version 1.3: CPU stats
        * Collecting CPU statistics now

2004-07-12, Version 1.2: Using syslog
        * collectd is now using the syslog facility to report errors, warnings
          and the like..
        * The default directory is now /var/db/collectd

2004-07-10, Version 1.1: Minor changes
        * Nothing really useful to say ;)

2004-07-09, Version 1.0: Initial Version
        * The following modules are provided:
          * Load average
          * Ping time
          * Traffic
          * Memory info