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Check_MK Werk 8572: Made scheduling of check helpers more robust

by Lars Michelsen

ID: 8572 Title: Made scheduling of check helpers more robust Component: cmc Level: 2 Class: Bug fix Version: 1.4.0i1 Under very rare circumstances the monitoring core miscounted the number of idle helpers, leading to an endless loop with 100% CPU load.

7 years, 7 months

Check_MK Werk 8573: Handle large regular expressions more gracefully

by Lars Michelsen

ID: 8573 Title: Handle large regular expressions more gracefully Component: cmc Level: 1 Class: Bug fix Version: 1.4.0i2 Livestatus queries with large regular expressions in their filters could lead to a stack overflow and consequently to a termination of the micro core. To handle this in a more robust way, we set a limit on the size and complexity of a regular expression, and bump the stack sizes of the Livestatus threads from 64kB to 256kB. The net result is that we can correctly handle regular expression patters of up to roughly 2k characters, the exact value depends on the regex features used. For larger expressions we return a failure status in a clean way.

7 years, 7 months

Check_MK Werk 8574: Added support for warn/crit/min/max values via Carbon/InfluxDB connections

by Lars Michelsen

ID: 8574 Title: Added support for warn/crit/min/max values via Carbon/InfluxDB connections Component: cmc Level: 1 Class: New feature Version: 1.4.0i2 In addition to the value of a metric itself, it is now possible to send the warn/crit/min/max values of a metric to Carbon/InfluxDB, too. This is configurable per service via rules (previously it was just configurable if the metric value should be sent or not).

7 years, 7 months

Check_MK Werk 8575: Fixed segfaults and incorrect Livestatus replies when history file is missing

by Lars Michelsen

ID: 8575 Title: Fixed segfaults and incorrect Livestatus replies when history file is missing Component: cmc Level: 1 Class: Bug fix Version: 1.4.0i3 When the history file is missing at cmc startup time, the next "GET log" query will cause a segfault. After the automatic restart, further similar queries will just return an empty reply until the next log rotation, although the core has created a history by then.

7 years, 7 months

Check_MK Werk 8569: Fixed 'persistent' and 'source' columns in 'comments' table.

by Lars Michelsen

ID: 8569 Title: Fixed 'persistent' and 'source' columns in 'comments' table. Component: Livestatus Level: 1 Class: Bug fix Version: 1.4.0i1

7 years, 7 months

Check_MK Werk 8570: Make PROCESS_HOST_CHECK_RESULT's behavior more Nagios-like

by Lars Michelsen

ID: 8570 Title: Make PROCESS_HOST_CHECK_RESULT's behavior more Nagios-like Component: cmc Level: 1 Class: Bug fix Version: 1.4.0i1 The Nagios documentation for the external command PROCESS_HOST_CHECK_RESULT explicitly states that the return code in the commandline is already the host state, not the result code of a check result (which was the core's previous interpretation). We follow Nagios now more closely and map the return code in the commandline as follows: 0 => UP 1 => DOWN/UNREACHABLE (previously this meant UP, too) 2 => DOWN/UNREACHABLE We still deviate a bit from Nagios, because the actual decision if a host is DOWN or UNREACHABLE is done by the core and can't be overridden from the outside.

7 years, 7 months

Check_MK Werk 8571: Guard against mixing up check results from different hosts.

by Lars Michelsen

ID: 8571 Title: Guard against mixing up check results from different hosts. Component: cmc Level: 2 Class: Bug fix Version: 1.4.0i1

7 years, 7 months

Check_MK Werk 8565: Handle non-existent parents gracefully

by Lars Michelsen

ID: 8565 Title: Handle non-existent parents gracefully Component: cmc Level: 1 Class: Bug fix Version: 1.4.0i1

7 years, 7 months

Check_MK Werk 8566: Fixed 100% CPU load of cmc when the real time port could not be bound

by Lars Michelsen

ID: 8566 Title: Fixed 100% CPU load of cmc when the real time port could not be bound Component: cmc Level: 1 Class: Bug fix Version: 1.4.0i1

7 years, 7 months

Check_MK Werk 8567: Invertible Graphite mangling

by Lars Michelsen

ID: 8567 Title: Invertible Graphite mangling Component: cmc Level: 1 Class: New feature Version: 1.4.0i1 When sending performance data to Graphite, the host/service/variable part needs to be mangled. The result of the default mangling is more readable (it simply replaces special characters with an underscore), but it is not invertible. This change adds C-style mangling using the standard octal escapes ('\\ooo'), so you can reconstruct the various parts from the data sent to Graphite.

7 years, 7 months

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