how to represent status of something not associated with a single host?
Let's say I have something, in this case DHCP server failover status, that although the parts of it run on two or more hosts, isn't strictly associated with either one (ideally if both DHCP servers are up, they'd both show the same failover status for each other). It could be some other distributed processing state that doesn't depend on any single system to still be available.
Let's say even that I can write a server-side script for it. Where the heck should I show the information? Maybe make up a fake host for global state like that, suppress display of all the usual probes for it, and only show the ones I want?
Hi Richard,
I use to think that when several hosts are bond together for providing a specific service, I would consider this is a cluster. Hence, I invite you to create a fake host that could embed all of your clustered services, and design some tests.
Le 21/08/2020 ? 19:17, Richard L. Hamilton a ?crit?:
Let's say I have something, in this case DHCP server failover status, that although the parts of it run on two or more hosts, isn't strictly associated with either one (ideally if both DHCP servers are up, they'd both show the same failover status for each other). It could be some other distributed processing state that doesn't depend on any single system to still be available.
Let's say even that I can write a server-side script for it. Where the heck should I show the information? Maybe make up a fake host for global state like that, suppress display of all the usual probes for it, and only show the ones I want?
Xymon mailing list Xymon at xymon.com http://lists.xymon.com/mailman/listinfo/xymon
Hi,
I have used the combo test to great effect in these circumstances.? Configure a standard network test (eg smtp) on each server, but exclude the smtp column from the row for that server.? Then configure a combo test for some made-up server name on separate row, you can play with NAME in hosts.cfg to display something useful on the page instead of your made-up name. ? My combo.cfg may contain something like this:
MyImportantService.SMTP_PRD.smtp = (
server1.smtp &&
server2.smtp
)
Just a couple of things that caught me out that you may want to beware of ...
- Test names are stored internally by first usage and subsequent matches are done ignoring case, so if for example, dbcheck.pl has defined a test called "Cluster" then all the following will match :- ???? cluster -> Cluster ???? CLUSTER -> Cluster ???? CluSter -> Cluster so even if you define your column names in lower case, they will appear on the display in original case.
- host names with dashes must be escaped because My-Important-Service will be interpreted as algebra if it appears on the RHS of any rule.
-- Andy
On 21/08/2020 18:17, Richard L. Hamilton wrote:
Let's say I have something, in this case DHCP server failover status, that although the parts of it run on two or more hosts, isn't strictly associated with either one (ideally if both DHCP servers are up, they'd both show the same failover status for each other). It could be some other distributed processing state that doesn't depend on any single system to still be available.
Let's say even that I can write a server-side script for it. Where the heck should I show the information? Maybe make up a fake host for global state like that, suppress display of all the usual probes for it, and only show the ones I want?
Xymon mailing list Xymon at xymon.com http://lists.xymon.com/mailman/listinfo/xymon
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a.b.smith＠shadymint.com
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damien＠makelofine.org
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rlhamil2＠gmail.com