CMK version: 2.3.0p29 enterprise pro OS version: Red Hat Linux 9.7
Error message: Tried to create /opt/omd/sites/xxx/var/pnp4nagios/perfdata/xxxt.rrd, but this RRD exists
Hello, yesterday our CMK appears to have crashed after generating over a million messages like the above, seemingly one for every rrd file of every monitored service. When I check in today’s cmc.log, after a fresh restart, there are 0 messages like the above.
I’ve not seen the above before and to my knowledge this appears to be the first time I’ve ever seen what looks like a CMK server crash.
Is anyone able to shed any light on what might have happened here? When I spot check the graphs, they seem fine and I don’t notice any missing data or anything else amiss.
I took another look through the zipped cmc log files and it seems this message has been occurring for a while. Is it something to be concerned about? I can check the system logs further if you can point me in the right direction as to what to look for. Thanks.
As you are using the enterprise edition, you should have no messages like this
aynwhere.
Do you have migrated all your old PNP4Nagios rrd files to the new CMC format?
First i would inspect my rulesets for two rules → “Configuration of RRD databases of services” and “Configuration of RRD databases of hosts”. In booth section minimal one rule should exist.
Appreciate the feedback here, as always. This site was at some point running a much older community version. It appears that it does not have any of the RRD monitoring rules, and although rrdcached is running, it looks like all of the perf files are still under pnp4nagios, and I see nothing under ~/var/rrdcached
I’ll review the documents recommended here, it appears we missed a step in our various upgrades. Thanks!