Checkmk werks level1

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Checkmk Werk 14608: Agent Bakery: Stabilize bake & sign

by Andreas Umbreit

ID: 14608 Title: Agent Bakery: Stabilize bake & sign Component: cmc Level: 1 Class: Bug fix Version: 2.2.0i1 In some situations, it could happen that some agent packages are signed with an invalid signature after baking/signing with "Bake and sign agents" action. The cause for this was that the signature of pre-existing packages sometimes wouldn't get updated if the package had to be repackaged for a bakery revision update. This resulted in the agent updater being unable to update affected hosts and exiting with message <tt>signature #n is invalid</tt>, and the matching Check_MK service showing a WARN</t> state. Signatures will be fixed and updates will continue to work after first bake&sign action after applying this Werk.

2 years, 1 month

Checkmk Werk 14721: Crash using the cmk_site_statistics (core PIDs) filter

by Lukas Lengler

ID: 14721 Title: Crash using the cmk_site_statistics (core PIDs) filter Component: Multisite Level: 1 Class: Bug fix Version: 2.2.0i1 When using the cmk_site_statistics (core PIDs) filter with no monitoring data present the view would crash. Note: This filter is not intended to be used in views and should only be used in host and service problem graphs. But due to compatibility the filter is not removed from view filters. Now the view no longer crashes but rather displays a warning.

2 years, 1 month

Checkmk Werk 14361: Windows agent uses retry_count correctly

by Sergey Kipnis

ID: 14361 Title: Windows agent uses retry_count correctly Component: Checks & agents Level: 1 Class: Bug fix Version: 2.2.0i1 Previously, Windows agent used retry_count as a maximal allowed count of plugin's failures. If the count of failures exceeded the limit set by retry_count, then the plugin had been excluded from execution. Such behavior may break monitoring or updating in some cases. Since this release, the retry_count is defined as a maximally allowed count of attempts to call a plugin before clearing the previously gathered data (also known as a cache). This approach is fully compliant with the documentation, the help and the functionality of the Linux agent. The incompatibility in this werk is limited by definition: the Windows agent will continue to call a plugin even if the number of errors exceeds retry_count. This is the same behavior as when retry_count is not set at all. IMPORTANT: Windows agent always ignores retry_count for synchronous plugins. Windows agent may decrease value of retry_count if the value is set too high.

2 years, 1 month

Checkmk Werk 14669: fix netstat parsing on OpenBSD agent

by External contributor

ID: 14669 Title: fix netstat parsing on OpenBSD agent Component: agents Level: 1 Class: Bug fix Version: 2.2.0i1 Parsing of netstat output on OpenBSD agent is fixed.

2 years, 1 month

Checkmk Werk 14659: downtime: improvement of code example for show downtimes endpoint

by Wontek Hong

ID: 14659 Title: downtime: improvement of code example for show downtimes endpoint Component: REST API Level: 1 Class: New feature Version: 2.2.0i1

2 years, 1 month

Checkmk Werk 14713: <tt>graylog_failures</tt>: Fix crash with <tt>JSONDecodeError</tt>

by Joerg Herbel

ID: 14713 Title: <tt>graylog_failures</tt>: Fix crash with <tt>JSONDecodeError</tt> Component: Checks & agents Level: 1 Class: Bug fix Version: 2.2.0i1 Depending on the failures reported by the Graylog API, the check plugin <tt>graylog_failures</tt> crashed with C+: JSONDecodeError (Expecting value: line 1 column 1 (char 0)) C-:

2 years, 1 month

Checkmk Werk 14150: Traceback in "Percentage of total service problems" dashlet with missing monitoring data

by Lukas Lengler

ID: 14150 Title: Traceback in "Percentage of total service problems" dashlet with missing monitoring data Component: Multisite Level: 1 Class: Bug fix Version: 2.2.0i1 When using a "Percentage of total service problems" dashlet without the necessary monitoring data the dashlet would display a traceback of the error. The error also occured in the Main dashboard which uses this dashlet by default. Now the error message is displayed as a text message in the dashlet.

2 years, 1 month

Checkmk Werk 14482: Use proper HMAC for cookie signing

by Maximilian Wirtz

ID: 14482 Title: Use proper HMAC for cookie signing Component: Setup Level: 1 Class: Security fix Version: 2.2.0i1 Previously to this Werk the Session cookies were signed with with calculating a SHA256 hash over username, session id, a serial plus a secret. This could in theory lead to a "partial message collision". Since we parse the data given in the cookie and test for validity, we are confident that such an attack is not possible. But to be future-proof we switch to proper HMAC for signing the cookie value. This will invalidate all session cookies for a site. Therefore all users have to reauthenticate to retrieve new valid cookies.

2 years, 1 month

Checkmk Werk 14360: Controller communicates with Windows agent using mailslot

by Sergey Kipnis

ID: 14360 Title: Controller communicates with Windows agent using mailslot Component: Checks & agents Level: 1 Class: New feature Version: 2.2.0i1 Previously, the Windows agent controller used TCP-IP as a channel to local Windows agent, but this type of communication can lead to port conflicts. Also, mailslots inherently provide slightly better level of local security. If, for some reason it is required to use TCP-IP as a channel, you may set system.controller.agent_channel in the check_mk.user.yml to any appropriate value, for example, "localhost:28250".

2 years, 1 month

Checkmk Werk 14658: dcd config: fix save mechanism for checkbox based host attribute tags

by Wontek Hong

ID: 14658 Title: dcd config: fix save mechanism for checkbox based host attribute tags Component: Setup Level: 1 Class: Bug fix Version: 2.2.0i1 Previously, the dcd failed during the host bulk discovery step if the configuration contained a host attribute tag that was enabled via a checkbox. This werk fixes this problem

2 years, 1 month

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