BMC Impact Integration Web Services and high availability (HA) cells

You can configure high availability (HA) cells for the BMC Impact Integration Web Services server to ensure a consistent connection for querying, in the event that the primary cell fails. This section provides information about how to configure HA cells:

Installing BMC Impact Integration Web Services server and the primary cell server of the HA on the same system

In this scenario, the BMC Impact Integration Web Services server and the primary cell server of the HA pair are installed on the same system (System A). The secondary cell server of the HA pair is installed on a second system (System B).

Because the cell both sends and receives events to and from the BMC Impact Integration Web Services server, both primary and secondary cell servers must have a IIWSGatewayServer entry in their respective mcell.dir files. (If the cell servers were only receiving events from the BMC Impact Integration Web Services server, then they would not need the IIWSGatewayServer entry.)

Following figures depict the mcell.dir file entries required in the following scenarios:

• The BMC Impact Integration Web Services server is installed on System A.
• The primary cell server of the HA is also installed on System A.
• The secondary cell server is installed on System B.

System A: mcell.dir for the BMC Impact Integration Web Services server

Type             Name            EncryptionKey     IPAddress:Port

gateway.imcomm     IIWSGatewayServer   mc            SystemA:1859
cell               Alphonse            mc            SystemA:1828 SystemB:1828

All of the mcell.dir files on System A and System B require an entry that defines the HA pair (Alphonse).

System A: mcell.dir for the primary cell server of the HA pair

Type             Name               EncryptionKey    IPAddress:Port

gateway.imcomm     IIWSGatewayServer   mc              SystemA:1859
cell               Alphonse            mc              SystemA:1828 SystemB:1828

The primary cell server of the HA pair on System A both sends and receives events. Therefore, the mcell.dir file for the primary cell server on System A requires an IIWSGatewayServer entry.

System B: mcell.dir for the secondary cell server of the HA pair

Type             Name                 EncryptionKey    IPAddress:Port

gateway.imcomm     IIWSGatewayServer    mc               SystemA:1859
cell               Alphonse             mc               SystemA:1828 SystemB:1828

The mcell.dir file for the secondary cell server on System B includes an IIWSGatewayServer entry because, when it is active, the secondary cell server sends and receives events.

Installing BMC Impact Integration Web Services server and the primary cell server of the HA pair on different systems

In this scenario, the BMC Impact Integration Web Services server and the primary cell server of the HA pair are installed on different systems. The secondary cell server of the HA pair is installed on a third system.

 Following figures depict the mcell.dir file entries required in the following scenario:

• The BMC Impact Integration Web Services server is installed on System 1.
• The primary cell server of the HA is installed on System 2.
• The secondary cell server is installed on System 3.

As in the previous scenario, the HA cell (Alphonse) both sends and receives events to and from the BMC Impact Integration Web Services server. Consequently, both primary and secondary cell servers must have an IIWSGatewayServer entry in their respective mcell.dir files.

System 1: mcell.dir for the BMC Impact Integration Web Services server

Type           Name               EncryptionKey   IPAddress:Port

gateway.imcomm   IIWSGatewayServer   mc             System1:1859
cell             Alphonse            mc             System2:1828 System3:1828

The preceding figure depicts the mcell.dir file for the BMC Impact Integration Web Services server residing on System 1. It specifies the HA cell, Alphonse, that resides on Systems 2 and 3.

System 2: mcell.dir for the primary cell server of the HA pair

Type           Name            EncryptionKey    IPAddress:Port

gateway.imcomm   IIWSGatewayServer   mc            System1:1859
cell             Alphonse            mc            System2:1828 System3:1828

The preceding figure depicts the mcell.dir file for primary cell server. It has an entry for the IIWSGatewayServer, which enables the primary cell server to both send and receive events.

System 3: mcell.dir for the secondary cell server of the HA pair

Type            Name            EncryptionKey   IPAddress:Port

gateway.imcomm   IIWSGatewayServer   mc            System1:1859
cell             Alphonse            mc            System2:1828 System3:1828