Configuration information verification apparatus and configuration information verification method

1. A configuration information verification apparatus, executed by a processor, comprising:

an alive monitoring information collecting unit for collecting alive monitoring information from a plurality of configuration items constituting a network;

a logical formula creating unit for referring to configuration information that represents information about connection relationships between the configuration items of the network and creating a logical formula with respect to each configuration item by performing an AND operation on configuration items positioned on a route leading to a selected one of the configuration items, and assigning a “true” value to the configuration item positioned on the route if the alive monitoring information indicates that the configuration item on the route is operating normally and assigning a “false” value to the configuration item positioned on the route if the alive monitoring information indicates that the configuration item on the route is not operating normally; and

a logical formula verifying unit for verifying, from a plurality of logical formulae created by the logical formula creating unit with respect to the plurality of configuration items, whether an inconsistent logical formula is present.

2. The configuration information verification apparatus according to claim 1 , wherein, the logical formula verifying unit performs an operation of substituting a value of a logical formula which includes a single configuration item, from among the plurality of logical formulae, into other logical formulae and determines whether the logical formulae obtained as a result of the operation are inconsistent.

3. The configuration information verification apparatus according to claim 1 , wherein, when a particular configuration item can be reached via a plurality of routes, the logical formula creating unit creates a plurality of logical formulae by performing an AND operation on configuration items positioned on each route leading to the particular configuration item and then creates a logical formula of the particular configuration item by performing an OR operation on the plurality of logical formulae.

4. The configuration information verification apparatus according to claim 1 , further comprising a logical formula inconsistency resolving unit for resolving, when the inconsistent logical formula is present, inconsistency by modifying connection relationships of configuration items included in the inconsistent logical formula.

5. The configuration information verification apparatus according to claim 4 , wherein, when the inconsistent logical formula has the “false” value, the logical formula inconsistency resolving unit determines that inconsistency is resolved by replacing configuration items in the inconsistent logical formula with configuration items of same type that are indicated to be operating normally by the alive monitoring information, and when the inconsistent logical formula has the “true” value, the logical formula inconsistency resolving unit determines that inconsistency is resolved by replacing configuration items in the inconsistent logical formula with configuration items of same type that are not indicated to be operating normally by the alive monitoring information.

6. A configuration information verification method comprising:

collecting alive monitoring information from a plurality of configuration items constituting a network;

referring to configuration information that represents information about connection relationships between the configuration items of the network and creating a logical formula with respect to each configuration item by performing an AND operation on configuration items positioned on a route leading to a selected one of the configuration items, and assigning a “true” value to the configuration item positioned on the route if the alive monitoring information indicates that the configuration item on the route is operating normally and assigning a “false” value to the configuration item positioned on the route if the alive monitoring information indicates that the configuration item on the route is not operating normally; and

verifying, from a plurality of logical formulae created with respect to the plurality of configuration items, whether an inconsistent logical formula is present.

7. A computer readable, non-transitory medium having stored therein a configuration information verification program, the configuration information verification program causing a computer to execute a process comprising:

collecting alive monitoring information from a plurality of configuration items constituting a network;

referring to configuration information that represents information about connection relationships between the configuration items of the network and creating a logical formula with respect to each configuration item by performing an AND operation on configuration items positioned on a route leading to a selected one of the configuration items, and assigning a “true” value to the configuration item positioned on the route if the alive monitoring information indicates that the configuration item on the route is operating normally and assigning a “false” value to the configuration item positioned on the route if the alive monitoring information indicates that the configuration item on the route is not operating normally; and

verifying, from a plurality of logical formulae created with respect to the plurality of configuration items, whether an inconsistent logical formula is present.