[2.3.0] Checkmk Werk 15842 created: Enhanced MS SQL Server monitoring

[//]: # (werk v2) # Enhanced MS SQL Server monitoring key | value ---------- | --- date | 2024-04-03T07:47:56+00:00 version | 2.3.0b4 class | feature edition | cre component | checks level | 2 compatible | yes With this release MS SQL Server is monitored using new plugin and new GUI. The old plugin is still supported but are considered deprecated. Key Enhancements out-of-the-box: - Configuration flexibility: The plugin can be configured through a YAML config file for any edition and/or a graphical user interface (GUI) for enterprise edition or better. - Cross platform: The plugin can be deployed on Linux and Windows. - Enhanced monitoring capabilities: Supports monitoring of remote databases on both Linux and Windows hosts, in addition to local monitoring on Windows hosts. - Customizable monitoring sections: Sections are now selectable and configurable - Customizable SQL statements: you may change SQL statement either manually(place file in `mssql` sub directory in config dir) or using `Custom files` rule in GUI. - Multi-instance support: Enables the selection of different instances for monitoring. Every instance can be configured separately - Multi-host support: possible to monitor databases on various hosts using one deployed plugin. - Security enhancements: Limited support for certificates is now available. - Asynchronous operation: Any section with exception `instances` can be set up for asynchronous operation. - Piggyback: It's possible to direct the output of a plugin to a different host, rather than to the host that retrieves the data. - Other improvements: - Automatic detection of instances is possible for any Windows host, local and remote, depending on SQL Server Setup. - Full logging support including rotation and file limits - Limit for maximal connection counts - Cache time and timeout can be configured too With regard to the old plug-in, there are also a few restrictions at the moment: - The database instances must be accessible via TCP/IP. - If several databases are running on a system, each using their own IP addresses, these must be explicitly specified in the configuration of the agent plug-in, as the addresses and ports are currently not yet found automatically.