On 10/17/07, Jacques Klein <[EMAIL PROTECTED]> wrote: > Each host runs a mon daemon with a mon.cf configured according to the > services to watch; > this depends of the kind of apps. installed on this host. > An application may need access to (a service on) an other host, so there > is a watch checking for this remote service. > When such a "server host" goes down (or crashes, or ...) , than there > can (will) be several alerts raised, one on each "client host". > This will, for example, result in duplicated and redondant email messages. > How can such a behavior avoided ?.
If I am reading you right, then you want the "depend" definition in your watch group: http://mon.wiki.kernel.org/index.php/Mon_Manual depend dependexpression The depend keyword is used to specify a dependency expression, which evaluates to either true of false, in the boolean sense. Dependencies are actual Perl expressions, and must obey all syn- tactical rules. The expressions are evaluated in their own pack- age space so as to not accidentally have some unwanted side- effect. If a syntax error is found when evaluating the expres- sion, it is logged via syslog. Before evaluation, the following substitutions on the expression occur: phrases which look like "group:service" are substituted with the value of the current operational status of that speci- fied service. These opstatus substitutions are computed recur- sively, so if service A depends upon service B, and service B depends upon service C, then service A depends upon service C. Successful operational statuses (which evaluate to "1") are "STAT_OK", "STAT_COLDSTART", "STAT_WARMSTART", and "STAT_UNKNOWN". The word "SELF" (in all caps) can be used for the group (e.g. "SELF:service"), and is an abbreviation for the current watch group. This feature can be used to control alerts for services which are dependent on other services, e.g. an SMTP test which is dependent upon the machine being ping-reachable. -- Augie Schwer - [EMAIL PROTECTED] - http://schwer.us Key fingerprint = 9815 AE19 AFD1 1FE7 5DEE 2AC3 CB99 2784 27B0 C072 _______________________________________________ mon mailing list mon@linux.kernel.org http://linux.kernel.org/mailman/listinfo/mon
