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Graphs for existing PING services using check_icmp broke after an upgrade to 9.13
Problem:
There are cases that customer is facing graph issue particularly PING services after an upgrade from previous version to 9.13 as shown below.
Check the content of the following files.
/opt/monitor/etc/pnp/npcd.cfg /opt/monitor/etc/pnp/process_perfdata.cfg
In most cases, you will see that RRD_STORAGE_TYPE entry value is “SINGLE” for process_perfdata.cfg file where default value must be “MULTIPLE”.
Solution:
Backup your /opt/monitor/etc/pnp/process_perfdata.cfg file and edit this line.
From:
RRD_STORAGE_TYPE = SINGLE
To:
RRD_STORAGE_TYPE = MULTIPLE
From /opt/monitor/op5/pnp/perfdata/<your_host_with_issue>directory, you will see files similar to this
PING.xml PING.rrd _HOST_.rrd _HOST_.xml
Delete them and restart npcd and rrdcached services.
systemctl restart npcd systemctl restart rrdcached
Deleted files will be generated. If the errors are gone, wait for at least 10 mins and the graph should start to appear, expected that there will be some gaps on the PING graphs.