3.3.4 Notes on Linux

(1) /etc/hosts file definition

When Red Hat Linux is installed, loopback address 127.0.0.1 might be defined for the IP address of a local node (in the following definition example, linux01) in the /etc/hosts file.

If the local SSO node is defined with a loopback address, various problems might occur, such as the collection database becoming unreferenceable, or the monitoring status for processes and services becoming unrecognizable. Therefore, in an environment that uses SSO, do not define 127.0.0.1 for the local node, but the local IP address (in this example, 172.16.49.18) instead. A definition example is shown below.

If the action IP address of SSO is set for the change-my-address: key in the ssoapmon action definition file (ssoapmon.def) and ssocolmng action definition file (ssocolmng.def), the above-described handling is not required.

For details about the respective definition files above, see 6.3.7 ssoapmon action definition file (ssoapmon.def) and 6.3.8 ssocolmng action definition file (ssocolmng.def).

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