Issue
Description of problem:
I have a Satellite 6.13 system with PCP installed.
To monitor a few interesting processes, I have enabled hotproc:
cat /var/lib/pcp/pmdas/proc/hotproc.conf
#pmdahotproc
Version 1.0
(
fname == "java" ||
fname == "redis-server" ||
(fname == "postgres" && psargs ~ /-D/) ||
psargs ~ /puma/ ||
psargs ~ /pulpcore.app.wsgi:application/ ||
psargs ~ /pulpcore.content:server/ ||
psargs ~ /pulpcore-worker/ ||
psargs ~ /smart-proxy/
)
cat /var/lib/pcp/config/pmlogconf/foreman-hotproc/summary
#pmlogconf-setup 2.0
ident
foreman hotproc metrics
probe
hotproc.control.config != "" ? include : exclude
hotproc.psinfo.psargs
hotproc.psinfo.cnswap
hotproc.psinfo.nswap
hotproc.psinfo.rss
hotproc.psinfo.vsize
hotproc.psinfo.cstime
hotproc.psinfo.cutime
hotproc.psinfo.stime
hotproc.psinfo.utime
hotproc.io.write_bytes
hotproc.io.read_bytes
hotproc.schedstat.cpu_time
hotproc.fd.count
When I restart pmlogger on its own, it generates the following snippet in /var/lib/pcp/config/pmlogger/config.default:
#+ foreman-hotproc/summary:y:default:
foreman hotproc metrics
log advisory on default {
hotproc.psinfo.psargs
hotproc.psinfo.cnswap
hotproc.psinfo.nswap
hotproc.psinfo.rss
hotproc.psinfo.vsize
hotproc.psinfo.cstime
hotproc.psinfo.cutime
hotproc.psinfo.stime
hotproc.psinfo.utime
hotproc.io.write_bytes
hotproc.io.read_bytes
hotproc.schedstat.cpu_time
hotproc.fd.count
}
#----
However, when I restart both pmcd and pmlogger together (`systemctl restart pmcd pmlogger`), I get:
#+ foreman-hotproc/summary:x::
#----
Thus no data is logged by pmlogger.
I could not trivially reproduce the issue on a different machine, so I assume it is some race condition where pmcd did not yet have properly initialized hotproc.control.config and pmlogger thinks it is not set and drops the include.
Version-Release number of selected component (if applicable):
pcp-5.3.7-16.el8.x86_64
How reproducible:
100% on one machine
0% on another ;/
Steps to Reproduce:
1. have a "loaded" pmcd with hotproc
2. systemctl restart pmcd pmlogger
Actual results:
pmlogger does not include configuration as it thinks hotproc.control.config is empty
Expected results:
pmlogger includes the config correctly
Additional info:
