Werk #16761: agent_azure: handling case insensitivity in Azure resource group names

Component	Checks & agents
Title	agent_azure: handling case insensitivity in Azure resource group names
Date	Apr 23, 2024
Level	Trivial Change
Class	Bug Fix
Compatibility	Incompatible - Manual interaction might be required
Checkmk versions & editions	2.4.0b1 Not yet released Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME) 2.3.0p2 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME) 2.2.0p27 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME)

This change impacts all those who are monitoring Azure systems.

Azure resource group names aren't case sensitive. The APIs may return values with different casing than the originally specified name. (see: https://learn.microsoft.com/en-us/azure/azure-resource-manager/management/frequently-asked-questions#are-resource-group-names-case-sensitive)

We modified the Azure agent in order to convert resources groups to lower case as soon as they are retrieved from the api.

This is an incompatible change so a rediscovery is needed for the services to be properly monitored.

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