## <a id="contribute"></a> Contribute
-There are many ways to contribute to Icinga - whether it be sending patches,
+There are many ways to contribute to Icinga -- whether it be sending patches,
testing, reporting bugs, or reviewing and updating the documentation. Every
contribution is appreciated!
Please get in touch with the Icinga team at https://www.icinga.org/community/.
-If you want to help update this documentation please read
+If you want to help update this documentation, please read
[this howto](https://wiki.icinga.org/display/community/Update+the+Icinga+2+documentation).
### <a id="development-info"></a> Icinga 2 Development
* [Register](https://accounts.icinga.org/register) an Icinga account.
* Create a new issue at the [Icinga 2 Development Tracker](https://dev.icinga.org/projects/i2).
-* When reporting a bug, please include the details described in the [Troubleshooting](16-troubleshooting.md#troubleshooting-information-required) chapter (version, configs, logs, etc).
+* When reporting a bug, please include the details described in the [Troubleshooting](15-troubleshooting.md#troubleshooting-information-required) chapter (version, configs, logs, etc.).
## <a id="whats-new"></a> What's New
+### What's New in Version 2.4.10
+
+#### Bugfixes
+
+* Bug [11812](https://dev.icinga.org/issues/11812 "Bug 11812") (Checker): Checker component doesn't execute any checks for command_endpoint
+
+### What's New in Version 2.4.9
+
+#### Changes
+
+This release fixes a number of issues introduced in 2.4.8.
+
+#### Bugfixes
+
+* Bug [11801](https://dev.icinga.org/issues/11801 "Bug 11801") (Perfdata): Error: Function call 'rename' for file '/var/spool/icinga2/tmp/service-perfdata' failed with error code 2, 'No such file or directory'
+* Bug [11804](https://dev.icinga.org/issues/11804 "Bug 11804") (Configuration): Segfault when trying to start 2.4.8
+* Bug [11807](https://dev.icinga.org/issues/11807 "Bug 11807") (Compat): Command Pipe thread 100% CPU Usage
+
+### What's New in Version 2.4.8
+
+#### Changes
+
+* Bugfixes
+* Support for limiting the maximum number of concurrent checks (new configuration option)
+* HA-aware features now wait for connected cluster nodes in the same zone (e.g. DB IDO)
+* The 'icinga' check now alerts on failed reloads
+
+#### Feature
+
+* Feature [8137](https://dev.icinga.org/issues/8137 "Feature 8137") (Checker): Maximum concurrent service checks
+* Feature [9236](https://dev.icinga.org/issues/9236 "Feature 9236") (Perfdata): PerfdataWriter: Better failure handling for file renames across file systems
+* Feature [9997](https://dev.icinga.org/issues/9997 "Feature 9997") (libmethods): "icinga" check should have state WARNING when the last reload failed
+* Feature [10581](https://dev.icinga.org/issues/10581 "Feature 10581") (ITL): Provide icingacli in the ITL
+* Feature [11556](https://dev.icinga.org/issues/11556 "Feature 11556") (libbase): Add support for subjectAltName in SSL certificates
+* Feature [11651](https://dev.icinga.org/issues/11651 "Feature 11651") (CLI): Implement SNI support for the CLI commands
+* Feature [11720](https://dev.icinga.org/issues/11720 "Feature 11720") (ITL): 'disk' CheckCommand: Exclude 'cgroup' and 'tracefs' by default
+* Feature [11748](https://dev.icinga.org/issues/11748 "Feature 11748") (Cluster): Remove unused cluster commands
+* Feature [11765](https://dev.icinga.org/issues/11765 "Feature 11765") (Cluster): Only activate HARunOnce objects once there's a cluster connection
+* Feature [11768](https://dev.icinga.org/issues/11768 "Feature 11768") (Documentation): Add the category to the generated changelog
+
+#### Bugfixes
+
+* Bug [9989](https://dev.icinga.org/issues/9989 "Bug 9989") (Configuration): Service apply without name possible
+* Bug [10426](https://dev.icinga.org/issues/10426 "Bug 10426") (libicinga): Icinga crashes with a segfault on receiving a lot of check results for nonexisting hosts/services
+* Bug [10717](https://dev.icinga.org/issues/10717 "Bug 10717") (Configuration): Comments and downtimes of deleted checkable objects are not deleted
+* Bug [11046](https://dev.icinga.org/issues/11046 "Bug 11046") (Cluster): Icinga2 agent gets stuck after disconnect and won't relay messages
+* Bug [11112](https://dev.icinga.org/issues/11112 "Bug 11112") (Compat): Empty author/text attribute for comment/downtimes external commands causing crash
+* Bug [11147](https://dev.icinga.org/issues/11147 "Bug 11147") (libicinga): "day -X" time specifications are parsed incorrectly
+* Bug [11158](https://dev.icinga.org/issues/11158 "Bug 11158") (libicinga): Crash with empty ScheduledDowntime 'ranges' attribute
+* Bug [11374](https://dev.icinga.org/issues/11374 "Bug 11374") (API): Icinga2 API: deleting service with cascade=1 does not delete dependant notification
+* Bug [11390](https://dev.icinga.org/issues/11390 "Bug 11390") (Compat): Command pipe overloaded: Can't send external Icinga command to the local command file
+* Bug [11396](https://dev.icinga.org/issues/11396 "Bug 11396") (API): inconsistent API /v1/objects/* response for PUT requests
+* Bug [11589](https://dev.icinga.org/issues/11589 "Bug 11589") (libicinga): notification sent out during flexible downtime
+* Bug [11645](https://dev.icinga.org/issues/11645 "Bug 11645") (Documentation): Incorrect chapter headings for Object#to_string and Object#type
+* Bug [11646](https://dev.icinga.org/issues/11646 "Bug 11646") (Configuration): Wrong log severity causes segfault
+* Bug [11686](https://dev.icinga.org/issues/11686 "Bug 11686") (API): Icinga Crash with the workflow Create_Host-> Downtime for the Host -> Delete Downtime -> Remove Host
+* Bug [11711](https://dev.icinga.org/issues/11711 "Bug 11711") (libicinga): Expired downtimes are not removed
+* Bug [11714](https://dev.icinga.org/issues/11714 "Bug 11714") (libbase): Crash in UnameHelper
+* Bug [11742](https://dev.icinga.org/issues/11742 "Bug 11742") (Documentation): Missing documentation for event commands w/ execution bridge
+* Bug [11757](https://dev.icinga.org/issues/11757 "Bug 11757") (API): API: Missing error handling for invalid JSON request body
+* Bug [11767](https://dev.icinga.org/issues/11767 "Bug 11767") (DB IDO): Ensure that program status updates are immediately updated in DB IDO
+* Bug [11779](https://dev.icinga.org/issues/11779 "Bug 11779") (API): Incorrect variable names for joined fields in filters
+
+### What's New in Version 2.4.7
+
+#### Bugfixes
+
+* Bug [11639](https://dev.icinga.org/issues/11639 "Bug 11639"): Crash in IdoMysqlConnection::ExecuteMultipleQueries
+
+### What's New in Version 2.4.6
+
+#### Feature
+
+* Feature [11638](https://dev.icinga.org/issues/11638 "Feature 11638"): Update RELEASE.md
+
+#### Bugfixes
+
+* Bug [11628](https://dev.icinga.org/issues/11628 "Bug 11628"): Docs: Zone attribute 'endpoints' is an array
+* Bug [11634](https://dev.icinga.org/issues/11634 "Bug 11634"): Icinga 2 fails to build on Ubuntu Xenial
+* Bug [11635](https://dev.icinga.org/issues/11635 "Bug 11635"): Failed assertion in IdoPgsqlConnection::FieldToEscapedString
+
+### What's New in Version 2.4.5
+
+#### Changes
+
+* Windows Installer changed from NSIS to MSI
+* New configuration attribute for hosts and services: check_timeout (overrides the CheckCommand's timeout when set)
+* ITL updates
+* Lots of bugfixes
+
+#### Feature
+
+* Feature [9283](https://dev.icinga.org/issues/9283 "Feature 9283"): Implement support for overriding check command timeout
+* Feature [9618](https://dev.icinga.org/issues/9618 "Feature 9618"): Add Windows setup wizard screenshots
+* Feature [11098](https://dev.icinga.org/issues/11098 "Feature 11098"): Add --method parameter for check_{oracle,mysql,mssql}_health CheckCommands
+* Feature [11194](https://dev.icinga.org/issues/11194 "Feature 11194"): Add --units, --rate and --rate-multiplier support for the snmpv3 check command
+* Feature [11399](https://dev.icinga.org/issues/11399 "Feature 11399"): Update .mailmap for Markus Frosch
+* Feature [11437](https://dev.icinga.org/issues/11437 "Feature 11437"): Add silent install / reference to NSClient++ to documentation
+* Feature [11449](https://dev.icinga.org/issues/11449 "Feature 11449"): Build 64-bit packages for Windows
+* Feature [11473](https://dev.icinga.org/issues/11473 "Feature 11473"): Update NSClient++ to version 0.4.4.19
+* Feature [11474](https://dev.icinga.org/issues/11474 "Feature 11474"): Install 64-bit version of NSClient++ on 64-bit versions of Windows
+* Feature [11585](https://dev.icinga.org/issues/11585 "Feature 11585"): Make sure to update the agent wizard banner
+* Feature [11587](https://dev.icinga.org/issues/11587 "Feature 11587"): Update chocolatey uninstall script for the MSI package
+
+#### Bugfixes
+
+* Bug [9249](https://dev.icinga.org/issues/9249 "Bug 9249"): logrotate fails since the "su" directive was removed
+* Bug [10624](https://dev.icinga.org/issues/10624 "Bug 10624"): Add application manifest for the Windows agent wizard
+* Bug [10843](https://dev.icinga.org/issues/10843 "Bug 10843"): DB IDO: downtime is not in effect after restart
+* Bug [11106](https://dev.icinga.org/issues/11106 "Bug 11106"): Too many assign where filters cause stack overflow
+* Bug [11224](https://dev.icinga.org/issues/11224 "Bug 11224"): Socket Exceptions (Operation not permitted) while reading from API
+* Bug [11227](https://dev.icinga.org/issues/11227 "Bug 11227"): Downtimes and Comments are not synced to child zones
+* Bug [11258](https://dev.icinga.org/issues/11258 "Bug 11258"): Incorrect base URL in the icinga-rpm-release packages for Fedora
+* Bug [11336](https://dev.icinga.org/issues/11336 "Bug 11336"): Use retry_interval instead of check_interval for first OK -> NOT-OK state change
+* Bug [11347](https://dev.icinga.org/issues/11347 "Bug 11347"): Symlink subfolders not followed/considered for config files
+* Bug [11382](https://dev.icinga.org/issues/11382 "Bug 11382"): Downtimes are not always activated/expired on restart
+* Bug [11384](https://dev.icinga.org/issues/11384 "Bug 11384"): Remove dependency for .NET 3.5 from the chocolatey package
+* Bug [11387](https://dev.icinga.org/issues/11387 "Bug 11387"): IDO: historical contact notifications table column notification_id is off-by-one
+* Bug [11402](https://dev.icinga.org/issues/11402 "Bug 11402"): Explain how to use functions for wildcard matches for arrays and/or dictionaries in assign where expressions
+* Bug [11407](https://dev.icinga.org/issues/11407 "Bug 11407"): Docs: Remove the migration script chapter
+* Bug [11434](https://dev.icinga.org/issues/11434 "Bug 11434"): Config validation for Notification objects should check whether the state filters are valid
+* Bug [11435](https://dev.icinga.org/issues/11435 "Bug 11435"): Icinga 2 Windows Agent does not honor install path during upgrade
+* Bug [11438](https://dev.icinga.org/issues/11438 "Bug 11438"): Remove semi-colons in the auto-generated configs
+* Bug [11439](https://dev.icinga.org/issues/11439 "Bug 11439"): Update the CentOS installation documentation
+* Bug [11440](https://dev.icinga.org/issues/11440 "Bug 11440"): Docs: Cluster manual SSL generation formatting is broken
+* Bug [11455](https://dev.icinga.org/issues/11455 "Bug 11455"): ConfigSync broken from 2.4.3. to 2.4.4 under Windows
+* Bug [11462](https://dev.icinga.org/issues/11462 "Bug 11462"): Error compiling icinga2 targeted for x64 on Windows
+* Bug [11475](https://dev.icinga.org/issues/11475 "Bug 11475"): FatalError() returns when called before Application.Run
+* Bug [11482](https://dev.icinga.org/issues/11482 "Bug 11482"): API User gets wrongly authenticated (client_cn and no password)
+* Bug [11484](https://dev.icinga.org/issues/11484 "Bug 11484"): Overwriting global type variables causes crash in ConfigItem::Commit()
+* Bug [11494](https://dev.icinga.org/issues/11494 "Bug 11494"): Update documentation URL for Icinga Web 2
+* Bug [11522](https://dev.icinga.org/issues/11522 "Bug 11522"): Make the socket event engine configurable
+* Bug [11534](https://dev.icinga.org/issues/11534 "Bug 11534"): DowntimesExpireTimerHandler crashes Icinga2 with <unknown function>
+* Bug [11542](https://dev.icinga.org/issues/11542 "Bug 11542"): make install overwrites configuration files
+* Bug [11559](https://dev.icinga.org/issues/11559 "Bug 11559"): Segfault during config validation if host exists, service does not exist any longer and downtime expires
+* Bug [11564](https://dev.icinga.org/issues/11564 "Bug 11564"): Incorrect link in the documentation
+* Bug [11567](https://dev.icinga.org/issues/11567 "Bug 11567"): Navigation attributes are missing in /v1/objects/<type>
+* Bug [11574](https://dev.icinga.org/issues/11574 "Bug 11574"): Package fails to build on *NIX
+* Bug [11577](https://dev.icinga.org/issues/11577 "Bug 11577"): Compiler warning in NotifyActive
+* Bug [11582](https://dev.icinga.org/issues/11582 "Bug 11582"): icinga2 crashes when a command_endpoint is set, but the api feature is not active
+* Bug [11586](https://dev.icinga.org/issues/11586 "Bug 11586"): icinga2-installer.exe doesn't wait until NSIS uninstall.exe exits
+* Bug [11592](https://dev.icinga.org/issues/11592 "Bug 11592"): Remove instance_name from Ido*Connection example
+* Bug [11610](https://dev.icinga.org/issues/11610 "Bug 11610"): Windows installer does not copy "features-enabled" on upgrade
+* Bug [11617](https://dev.icinga.org/issues/11617 "Bug 11617"): Vim Syntax Highlighting does not work with assign where
+
+### What's New in Version 2.4.4
+
+#### Feature
+
+* Feature [10358](https://dev.icinga.org/issues/10358 "Feature 10358"): ITL: Allow to enforce specific SSL versions using the http check command
+* Feature [11205](https://dev.icinga.org/issues/11205 "Feature 11205"): Add "query" option to check_postgres command.
+
+#### Bugfixes
+
+* Bug [9642](https://dev.icinga.org/issues/9642 "Bug 9642"): Flapping notifications are sent for hosts/services which are in a downtime
+* Bug [9969](https://dev.icinga.org/issues/9969 "Bug 9969"): Problem notifications while Flapping is active
+* Bug [10225](https://dev.icinga.org/issues/10225 "Bug 10225"): Host notification type is PROBLEM but should be RECOVERY
+* Bug [10231](https://dev.icinga.org/issues/10231 "Bug 10231"): MkDirP not working on Windows
+* Bug [10766](https://dev.icinga.org/issues/10766 "Bug 10766"): DB IDO: User notification type filters are incorrect
+* Bug [10770](https://dev.icinga.org/issues/10770 "Bug 10770"): Status code 200 even if an object could not be deleted.
+* Bug [10795](https://dev.icinga.org/issues/10795 "Bug 10795"): http check's URI is really just Path
+* Bug [10976](https://dev.icinga.org/issues/10976 "Bug 10976"): Explain how to join hosts/services for /v1/objects/comments
+* Bug [11107](https://dev.icinga.org/issues/11107 "Bug 11107"): ITL: Missing documentation for nwc_health "mode" parameter
+* Bug [11159](https://dev.icinga.org/issues/11159 "Bug 11159"): Common name in node wizard isn't case sensitive
+* Bug [11208](https://dev.icinga.org/issues/11208 "Bug 11208"): CMake does not find MySQL libraries on Windows
+* Bug [11209](https://dev.icinga.org/issues/11209 "Bug 11209"): Wrong log message for trusted cert in node setup command
+* Bug [11240](https://dev.icinga.org/issues/11240 "Bug 11240"): DEL_DOWNTIME_BY_HOST_NAME does not accept optional arguments
+* Bug [11248](https://dev.icinga.org/issues/11248 "Bug 11248"): Active checks are executed even though passive results are submitted
+* Bug [11257](https://dev.icinga.org/issues/11257 "Bug 11257"): Incorrect check interval when passive check results are used
+* Bug [11273](https://dev.icinga.org/issues/11273 "Bug 11273"): Services status updated multiple times within check_interval even though no retry was triggered
+* Bug [11289](https://dev.icinga.org/issues/11289 "Bug 11289"): epoll_ctl might cause oops on Ubuntu trusty
+* Bug [11320](https://dev.icinga.org/issues/11320 "Bug 11320"): Volatile transitions from HARD NOT-OK->NOT-OK do not trigger notifications
+* Bug [11328](https://dev.icinga.org/issues/11328 "Bug 11328"): Typo in API docs
+* Bug [11331](https://dev.icinga.org/issues/11331 "Bug 11331"): Update build requirements for SLES 11 SP4
+* Bug [11349](https://dev.icinga.org/issues/11349 "Bug 11349"): 'icinga2 feature list' fails when all features are disabled
+* Bug [11350](https://dev.icinga.org/issues/11350 "Bug 11350"): Docs: Add API examples for creating services and check commands
+* Bug [11352](https://dev.icinga.org/issues/11352 "Bug 11352"): Segmentation fault during 'icinga2 daemon -C'
+* Bug [11369](https://dev.icinga.org/issues/11369 "Bug 11369"): Chocolatey package is missing uninstall function
+* Bug [11385](https://dev.icinga.org/issues/11385 "Bug 11385"): Update development docs to use 'thread apply all bt full'
+
### What's New in Version 2.4.3
#### Bugfixes
projects / icinga2 / blobdiff