The rrdcached Daemon seems to be running as Apache. What user does your poller run as?
What user owns the rrd directory and the rrds inside?
I was going to do a test install on rhel but I didn't have time yet :/
Adam.
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On 1 Nov 2018, 04:08, at 04:08, "Gordon Cheng (gocheng) via observium" observium@observium.org wrote:
Thanks Adam.
It's version 1.6.0-0.3:
sjc-observium-1:/root# yum install rrdtool <...snipped...> Package rrdtool-1.6.0-0.3.opennms.el7.centos.x86_64 already installed and latest version Nothing to do sjc-observium-1:/root#
I thought "service rrdcached stop" would stop the process, but looks like it's NOT the case?
sjc-observium-1:/var/run/rrdcached# cat /var/run/rrdcached/rrdcached.pid 2453 sjc-observium-1:/var/run/rrdcached# ps aux | grep rrdcache apache 2453 0.1 0.1 574224 73488 ? Ssl 16:34 0:20 /usr/sbin/rrdcached -w 1800 -z 1800 -f 3600 -s apache -l unix:/var/run/rrdcached/rrdcached.sock -j /var/tmp -m 664 -F -b /opt/observium/rrd -B -p /var/run/rrdcached/rrdcached.pid -l /var/run/rrdcached/rrdcached.sock root 14550 0.0 0.0 112652 956 pts/0 S+ 20:55 0:00 grep --color=auto rrdcache root 19867 0.0 0.0 119184 1932 pts/1 S+ 16:51 0:00 man rrdcached sjc-observium-1:/var/run/rrdcached# service rrdcached stop Stopping rrdcached (via systemctl): [ OK ] sjc-observium-1:/var/run/rrdcached# ps aux | grep rrdcache apache 2453 0.1 0.1 574224 73488 ? Ssl 16:34 0:20 /usr/sbin/rrdcached -w 1800 -z 1800 -f 3600 -s apache -l unix:/var/run/rrdcached/rrdcached.sock -j /var/tmp -m 664 -F -b /opt/observium/rrd -B -p /var/run/rrdcached/rrdcached.pid -l /var/run/rrdcached/rrdcached.sock root 14790 0.0 0.0 112652 960 pts/0 S+ 20:55 0:00 grep --color=auto rrdcache root 19867 0.0 0.0 119184 1932 pts/1 S+ 16:51 0:00 man rrdcached sjc-observium-1:/var/run/rrdcached# service rrdcached start Starting rrdcached (via systemctl): Job for rrdcached.service failed because a timeout was exceeded. See "systemctl status rrdcached.service" and "journalctl -xe" for details. [FAILED] sjc-observium-1:/var/run/rrdcached#
Does it mean we already have a copy of rrdcached running properly and so another service start would fail?
And we can just un-comment the rrdcached entry in config.php, and rrdcached should then start working?
Thanks.
- Gordon
From: observium observium-bounces@observium.org on behalf of Adam Armstrong via observium observium@observium.org Reply-To: Observium observium@observium.org Date: Wednesday, October 31, 2018 at 5:41 PM To: David Rossi via observium observium@observium.org Cc: Adam Armstrong adama@memetic.org Subject: Re: [Observium] 'rrdcached' Config Issue
Hi,
I'm not sure how rrdcached could possible have a different timestamp than the rest of the system. oO
I wonder if this is because you started rrdcached during a poll or something. Or perhaps have 2 copies of rrdcached running.
I just installed a clean install via the install script and enabled rrdcached and it worked ok on Ubuntu 18.04.
/etc/defaults/rrdcached :
#### # /etc/default file for RRD cache daemon
# Full path to daemon DAEMON=/usr/bin/rrdcached
# Optional override flush interval, in seconds. WRITE_TIMEOUT=300
# Optional override maximum write delay, in seconds. WRITE_JITTER=0
# Optional override number of write_threads WRITE_THREADS=4
# Where database files are placed. If left unset, the default /tmp will # be used. NB: The daemon will reject a directory that has symlinks as # components. NB: You may want to have -B in BASE_OPTS. BASE_PATH=/opt/observium/rrd/
# Where journal files are placed. If left unset, journaling will # be disabled. JOURNAL_PATH=/var/lib/rrdcached/journal/
# FHS standard placement for process ID file. PIDFILE=/var/run/rrdcached.pid
# FHS standard placement for local control socket. SOCKFILE=/var/run/rrdcached.sock
# Optional override group that should own/access the local control # socket SOCKGROUP=www-data
# Optional override access mode of local control socket. SOCKMODE=0660
# Optional unprivileged group to run under when daemon. If unset # retains invocation group privileges. DAEMON_GROUP=observium
# Optional unprivileged user to run under when daemon. If unset # retains invocation user privileges. DAEMON_USER=observium
# Network socket address requests. Use in conjunction with SOCKFILE to # also listen on INET domain sockets. The option is a lower-case ell # ASCII 108 = 0x6c, and should be repeated for each address. The # parameter is an optional IP address, followed by an optional port with # a colon separating it from the address. The empty string is # interpreted as "open sockets on the default port on all available # interfaces", but generally does not pass through init script functions # so use -L with no parameters for that configuration. #NETWORK_OPTIONS="-L"
# Any other options not specifically supported by the script (-P, -f, # -F, -B). BASE_OPTIONS="-B" ####
This is the command as it's running :
/usr/bin/rrdcached -B -w 300 -z 0 -t 4 -b /opt/observium/rrd/ -j /var/lib/rrdcached/journal/ -G observium -U observium -p /var/run/rrdcached.pid -s www-data -m 0660 -l unix:/var/run/rrdcached.sock
What version of rrdtool is this?
adam.
On 2018-11-01 00:02:04, Gordon Cheng (gocheng) via observium observium@observium.org wrote: Hi all,
In an attempt to improve the performance (previous email thread with subject Performance Issue - High CPU with 'mysqld'?), I'm trying to use 'rrdcached' on a new setup (version 18.9.9428 (9th September 2018) with the following configuration:
===
sjc-observium-1:/etc/init.d# cat rrdcached <...snipped...> # Path to the apachectl script, server binary, and short-form for messages. rrdcached=/usr/sbin/rrdcached prog=rrdcached pidfile=/var/run/rrdcached/rrdcached.pid sockfile=/var/run/rrdcached/rrdcached.sock lockfile=/var/lock/subsys/rrdcached RETVAL=0 <...snipped...>
sjc-observium-1:/etc/sysconfig# cat rrdcached <...snipped...> RRDCACHED_USER="apache" OPTIONS="-w 1800 -z 1800 -f 3600 -s apache -l unix:/var/run/rrdcached/rrdcached.sock -j /var/tmp -m 664 -F -b /opt/observium/rrd -B" SOCKPERMS=0660 <...snipped...>
sjc-observium-1:/usr/lib/tmpfiles.d# cat rrdcached.conf d /run/rrdcached - apache apache sjc-observium-1:/usr/lib/tmpfiles.d#
sjc-observium-1:/opt/observium# grep rrd config.php //rrdcached #$config['rrdcached'] = "unix:/var/run/rrdcached/rrdcached.sock"; <<<====== will un-comment once rrdcached is configured and running sjc-observium-1:/opt/observium#
sjc-observium-1:/root# service rrdcached stop Stopping rrdcached (via systemctl): [ OK ] sjc-observium-1:/root# service rrdcached start Starting rrdcached (via systemctl):
Job for rrdcached.service failed because a timeout was exceeded. See "systemctl status rrdcached.service" and "journalctl -xe" for details. [FAILED] sjc-observium-1:/root#
sjc-observium-1:/opt/observium# systemctl status rrdcached.service -l ● rrdcached.service - SYSV: rrdcached is a daemon that receives updates to existing rrd files, accumulates them, and writes updates to file Loaded: loaded (/etc/rc.d/init.d/rrdcached; bad; vendor preset: disabled) Active: failed (Result: timeout) since Wed 2018-10-31 16:39:48 PDT; 11min ago Docs: man:systemd-sysv-generator(8) Process: 2449 ExecStart=/etc/rc.d/init.d/rrdcached start (code=exited, status=0/SUCCESS) CGroup: /system.slice/rrdcached.service └─2453 /usr/sbin/rrdcached -w 1800 -z 1800 -f 3600 -s apache -l unix:/var/run/rrdcached/rrdcached.sock -j /var/tmp -m 664 -F -b /opt/observium/rrd -B -p /var/run/rrdcached/rrdcached.pid -l /var/run/rrdcached/rrdcached.sock
Oct 31 16:34:51 sjc-observium-1 rrdcached[2453]: queue_thread_main: rrd_update_r (/opt/observium/rrd/aan-oob01/perf-pollermodule-fdb-table.rrd) failed with status -1. (/opt/observium/rrd/aan-oob01/perf-pollermodule-fdb-table.rrd: illegal attempt to update using time 1541024231 when last update time is 1541028534 (minimum one second step)) Oct 31 16:34:51 sjc-observium-1 rrdcached[2453]: queue_thread_main: rrd_update_r (/opt/observium/rrd/aan-oob01/perf-pollermodule-entity-physical.rrd) failed with status -1. (/opt/observium/rrd/aan-oob01/perf-pollermodule-entity-physical.rrd: illegal attempt to update using time 1541024224 when last update time is 1541028525 (minimum one second step)) Oct 31 16:34:51 sjc-observium-1 rrdcached[2453]: queue_thread_main: rrd_update_r (/opt/observium/rrd/aan-oob01/perf-pollermodule-hr-mib.rrd) failed with status -1. (/opt/observium/rrd/aan-oob01/perf-pollermodule-hr-mib.rrd: illegal attempt to update using time 1541024165 when last update time is 1541028466 (minimum one second step)) Oct 31 16:34:51 sjc-observium-1 rrdcached[2453]: queue_thread_main: rrd_update_r (/opt/observium/rrd/aan-oob01/perf-pollermodule-ipSystemStats.rrd) failed with status -1. (/opt/observium/rrd/aan-oob01/perf-pollermodule-ipSystemStats.rrd: illegal attempt to update using time 1541024166 when last update time is 1541028467 (minimum one second step)) Oct 31 16:34:51 sjc-observium-1 rrdcached[2453]: queue_thread_main: rrd_update_r (/opt/observium/rrd/aan-oob01/perf-pollermodule-loadbalancer.rrd) failed with status -1. (/opt/observium/rrd/aan-oob01/perf-pollermodule-loadbalancer.rrd: illegal attempt to update using time 1541024223 when last update time is 1541028524 (minimum one second step)) Oct 31 16:34:51 sjc-observium-1 rrdcached[2453]: queue_thread_main: rrd_update_r (/opt/observium/rrd/aan-oob01/perf-pollermodule-mempools.rrd) failed with status -1. (/opt/observium/rrd/aan-oob01/perf-pollermodule-mempools.rrd: illegal attempt to update using time 1541024147 when last update time is 1541028719 (minimum one second step)) Oct 31 16:39:48 sjc-observium-1 systemd[1]: rrdcached.service start operation timed out. Terminating. Oct 31 16:39:48 sjc-observium-1 systemd[1]: Failed to start SYSV: rrdcached is a daemon that receives updates to existing rrd files, accumulates them, and writes updates to file. Oct 31 16:39:48 sjc-observium-1 systemd[1]: Unit rrdcached.service entered failed state. Oct 31 16:39:48 sjc-observium-1 systemd[1]: rrdcached.service failed. sjc-observium-1:/opt/observium#
===
Any suggestions or docs/links showing how it can be resolved?
Thanks.
- Gordon