Download Red Hat Network Satellite 5.1.1 Reference Guide

Probes
Probes
As described in Section 6.10, “Monitoring —
”, Monitoring-entitled systems can have probes applied
to them that constantly confirm their health and full operability. T his appendix lists the available probes
broken down by command group, such as Apache.
Many probes that monitor internal system aspects (such as the Linux::Disk Usage probe) rather than
external aspects (such as the Network Services::SSH probe) require the installation of the Red Hat
Network Monitoring Daemon (rhnm d). T his requirement is noted within the individual probe reference.
Each probe has its own reference in this appendix that identifies required fields (marked with *), default
values, and the thresholds that may be set to trigger alerts. Similarly, the beginning of each command
group's section contains information applicable to all probes in that group. Section C.1, “Probe
Guidelines” covers general guidelines; the remaining sections examine individual probes.
Note
Nearly all of the probes use Transmission Control Protocol (T CP) as their transport protocol.
Exceptions to this are noted within the individual probe references.
C.1. Probe Guidelines
T he following general guidelines outline the meaning of each probe state, and provide guidance in
setting thresholds for your probes.
T he following list provides a brief description of the meaning of each probe state:
Unknown
T he probes that cannot collect the metrics needed to determine probe state. Most (though not
all) probes enter this state when exceeding their timeout period. Probes in this state may be
configured incorrectly, as well.
Pending
T he probes whose data has not been received by the RHN Satellite Server. It is normal for new
probes to be in this state. However, if all probes move into this state, your monitoring
infrastructure may be failing.
OK
T he probes that have run successfully without error. T his is the desired state for all probes.
Warning
T he probes that have crossed their WARNING thresholds.
Critical
T he probes that have crossed their CRIT ICAL thresholds or reached a critical status by some
other means. (Some probes become critical when exceeding their timeout period.)
187