Werk #6484: Fixed filtering check plugins for the management board and the host itself

In order to decide which check is used for which data source we have to filter the found check plugins. This is done via the check_info key "management_board". There are three values with the following meanings: - MGMT_ONLY These check plugins - are only used for management board data sources, - have the prefix 'mgmt_' in their name, - have the prefix 'Management Interface:' in their service description. - If there is an equivalent host check plugin then it must be 'HOST_ONLY'.

• HOST_PRECEDENCE

  • Default value for all check plugins.
  • It does not have to be declared in the check_info.
  • Special situation for SNMP management boards:
    • If a host is not a SNMP host these checks are used for the SNMP management boards.
    • If a host is a SNMP host these checks are used for the host itself.

• HOST_ONLY These check plugins

  • are used for 'real' host data sources, not for host management board data sources
  • there is an equivalent 'MGMT_ONLY'-management board check plugin.

Migration from 1.4 to 1.5: in 1.4 TCP hosts with SNMP management boards discovered TCP and SNMP checks, eg. uptime and snmp_uptime. During checking phase these checks should be executed further on. In versions >= 1.5 there are management board specific check plugins, eg. mgmt_snmp_uptime. After a re-discovery Check_MK finds the uptime check plugin for the TCP host and the mgmt_snmp_uptime check for the SNMP management board. Moreover Check_MK eliminates 'HOST_ONLT' checks like snmp_uptime.

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