Traditional behaviour was to regard all dependecies as cumulative (e.g., the parent considered unreachable if any one dependency is violated), commit ed5892238916ab667a4c9d904bd73acd3ed162f2 made all dependencies regarded redundant (e.g., the parent considered unreachable only if all dependency are violated). This may lead to unrelated services (or even hosts vs. services) inadvertantly regarded to be redundant to each other.
Most importantly, applying the explicit "disable-host-service-checks" dependency described in the "Monitoring Basics" chapter will defeat all other dependencies.
This commit introduces a new "redundancy_group" attribute for dependencies.
Specifying a redundancy_group causes a dependency to be regarded as redundant only inside that redundancy group.
Dependencies lacking a redundancy_group attribute are regarded as essential for the parent.
This allows for both cumulative and redundant dependencies and even a combination (cumulation of redundancies, like SSH depeding on both LDAP and DNS to function, while operating redundant LDAP servers as well as redundant DNS resolvers).
This commit lacks changes to the tests.
* Update 09-object-types.md
Because in this document it is not clear which units are allowed for DB Cleanup, I asked in the Community for it: https://community.icinga.com/t/db-ido-cleanup-possible-units/3854/2. We came to the conclusion that it would help if there is a notice which units are possible/allowed for this. For better finding I wrote also a link to the language reference.
* Update 09-object-types.md
changed to the proposed "language reference"
* Update 09-object-types.md
Done. Sorry overlooked
* Update 09-object-types.md
accidentally inserted return undone . Hope now fits 😃
* Update 09-object-types.md
Requested Changes don
* Update 09-object-types.md
changed link to duration-literals
So far, the documentation has claimed that loggers have a default severity
(information for FileLogger and warning for SyslogLogger). However, this was
not the case and not setting the severity resulted in a configuration error.
This commit changes the default value to be information for all loggers.
This commit adds a timeout for both establishing new outgoing and incoming
connections. This timeout applies to everything until the connection is in a
state where either JsonRpcConnection or HttpServerConnection takes over.
Disregard passive check results while no active checks are being scheduled due to violated dependencies.
This copes with the fact that programs feeding passive check results into Icinga may have no notion of reachability and so drive a checkable into HARD state although dependencies have caused active check scheduling being suspended. This may prevent superflous problem notifications being emitted during recovery.
As disable_checks defaults to false, it was regarded OK (by @Al2Klimov) to make this behaviour (which resembles the active check case) unconditional and not conditionalize it on an additional attribute.
In the description of disable_checks, note that a value of true both disables scheduling of active checks and drops passive check results.
