## <a id="what-is-icinga2"></a> What is Icinga 2?
Icinga 2 is an open source monitoring system which checks the availability of your
-network resources, notifies users of outages and generates performance data for reporting.
+network resources, notifies users of outages, and generates performance data for reporting.
-Scalable and extensible, Icinga 2 can monitor complex, large environments across
+Scalable and extensible, Icinga 2 can monitor large, complex environments across
multiple locations.
## <a id="licensing"></a> Licensing
## <a id="support"></a> Support
Support for Icinga 2 is available in a number of ways. Please have a look at
-the support overview page at [https://support.icinga.org].
+the [support overview page](https://support.icinga.org).
## <a id="contribute"></a> Contribute
-There are many ways to contribute to Icinga - be it by sending patches, testing and
-reporting bugs, reviewing and updating the documentation. Every contribution
+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/ecosystem/].
+Please get in touch with the Icinga team at https://www.icinga.org/community/.
-## <a id="demo-vm"></a> Demo VM
+### <a id="development"></a> Icinga 2 Development
-Icinga 2 is available as [Vagrant Demo VM](#vagrant).
+You can follow Icinga 2's development closely by checking
+out these resources:
-## <a id="whats-new"></a> What's new
-
-### What's New in Version 2.0.0 Beta 1
-
-Lots of things. Please read [Icinga 2 in a nutshell](#icinga2-in-a-nutshell).
-
-#### Changes
-
-### Archive
-
-Please check the `ChangeLog` file.
-
-## <a id="icinga2-in-a-nutshell"></a> Icinga 2 in a Nutshell
-
-* Use [Packages](#getting-started)
-
-Look for available packages on [http://packages.icinga.org] or ask your distribution's maintainer.
-Compiling from source is not recommended, and not the default either.
-
-* Real Distributed Architecture
-
-[Cluster](#distributed-monitoring-high-availability) model for distributed setups, load balancing
-and High-Availability installations. Secured by SSL x509 certificates, supporting IPv4 and IPv6.
-
-* High Performance
-
-Multithreaded and scalable for small embedded systems as well as large scale environments.
-Running checks every second - not an issue anymore.
-
-* Modular & flexible [features](#features)
-
-Enable only the features required for the local installation. Using Icinga Web 2 and requiring
-DB IDO, but no status data? No problem, just enable ido-mysql and disable statusdata.
-Another example: Graphite should be enabled on a dedicated cluster node. Enable it over there
-and point it to the carbon cache socket.
+* [Development Bug Tracker](https://dev.icinga.org/projects/i2): [How to report a bug?](https://www.icinga.org/icinga/faq/)
+* Git Repositories: [main mirror on icinga.org](https://git.icinga.org/?p=icinga2.git;a=summary) [release mirror at github.com](https://github.com/Icinga/icinga2)
+* [Git Checkins Mailinglist](https://lists.icinga.org/mailman/listinfo/icinga-checkins)
+* [Development](https://lists.icinga.org/mailman/listinfo/icinga-devel) and [Users](https://lists.icinga.org/mailman/listinfo/icinga-users) Mailinglists
+* [#icinga-devel on irc.freenode.net](http://webchat.freenode.net/?channels=icinga-devel) including a Git Commit Bot
-* Native support for the [Livestatus protocol](#setting-up-livestatus)
+For general support questions, please refer to the [community support channels](https://support.icinga.org).
-Next to the Icinga 1.x status and log files and the IDO database backend the commonly used
-Livestatus protocol is available with Icinga 2. Either as unix or tcp socket.
+### <a id="how-to-report-bug-feature-requests"></a> How to Report a Bug or Feature Request
-* Native support for [Graphite](#graphite-carbon-cache-writer)
+More details in the [Icinga FAQ](https://www.icinga.org/icinga/faq/).
-Icinga 2 still supports writing performance data files for graphing addons, but also adds the
-capability of writing performance data directly onto a Graphite tcp socket simplifying realtime
-monitoring graphs.
+* [Register](https://exchange.icinga.org/authentication/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](8-troubleshooting.md#troubleshooting-information-required) chapter (version, configs, logs, etc).
-* Dynamic configuration language
-
-Simple [apply](#using-apply) and [assign](#group-assign) rules for creating configuration object
-relationships based on patterns. Supported with [duration literals](#duration-literals) for interval
-attributes, [expression operators](#expression-operators), [function calls](#function-calls) for
-pattern and regex matching and (global) [constants](#constants).
-Sample configuration for common plugins is shipped with Icinga 2 as
-part of the [Icinga Template Library](#itl).
-
-* Revamped Commands
-
-One command to rule them all - supporting optional and conditional [command arguments](#commands-arguments).
-[Environment variables](#command-environment-variables) exported on-demand populated with
-runtime evaluated macros.
-Three types of commands used for different actions: checks, notifications and events.
-Check timeout for commands instead of a global option. Command custom attributes allowing
-you to specify default values for the command.
-
-* Custom Runtime Macros
-
-Access [custom attributes](#custom-attributes) with their short name, for example $mysql_user$,
-or any object attribute, for example $host.notes$. Additional macros with runtime and statistic
-information are available as well. Use these [runtime macros](#runtime-custom-attributes) in
-the command line, environment variables and custom attribute assignments.
-
-* Notifications simplified
-
-Multiple [notifications](#notifications) for one host or service with existing users
-and notification commands. No more duplicated contacts for different notification types.
-Telling notification filters by state and type, even more fine-grained than Icinga 1.x.
-[Escalation notifications](#notification-escalations) and [delayed notifications](#first-notification-delay)
-are just notifications with additional begin and/or end time attribute.
-
-* Dependencies between Hosts and Services
-
-Classic [dependencies](#dependencies) between host and parent hosts, and services and parent services work the
-same way as "mixed" dependencies from a service to a parent host and vice versa. Host checks
-depending on an upstream link port (as service) are not a problem anymore.
-No more additional parents settings - host dependencies already define the host parent relationship
-required for network reachability calculations.
-
-* [Recurring Downtimes](#recurring-downtimes)
-
-Forget the external cronjob scheduling downtimes on-demand. Configure them right away as Icinga 2
-configuration objects and set their active time window.
-
-* Embedded Health Checks
-
-No more external statistic tool but an [instance](#itl-icinga) and [cluster](#itl-cluster) health
-check providing direct statistics as performance data for your graphing addon, for example Graphite.
-
-* Compatibility with Icinga 1.x
+## <a id="whats-new"></a> What's new
-All known interfaces are optional available: [status files](#status-data), [logs](#compat-logging),
-[DB IDO](#configuring-ido) MySQL/PostgreSQL, [performance data](#performance-data),
-[external command pipe](#external-commands) and for migration reasons a
-[checkresult file reader](#check-result-files) too.
-All [Monitoring Plugins](#setting-up-check-plugins) can be integrated into Icinga 2 with
-newly created check command configuration if not already provided.
-[Configuration migration](#configuration-migration) is possible through the Icinga Web 2 CLI tool.
-Additional information on the differences is documented in the [migration](#differences-1x-2) chapter.
+### What's New in Version 2.3
-* [Vagrant Demo VM](#vagrant)
+#### Changes
-Used for demo cases and development tests. Get Icinga 2 running within minutes and spread the #monitoringlove
-to your friends and partners.
+TODO
+#### Issues
+TODO
projects / icinga2 / blobdiff