Error Graphing Fresh Install RHEL

Tags: #<Tag:0x00007f9758a5fae0>

We are seeing Error Drawing Graph error our newly installed instance in RHEL. Pretty much everything involving drawing doesn’t work.

Couple things to note we are running out of a different directory than OPT. Moved it to a folder labeled /nre/

-bash-4.2$ ./validate.php

Component Version
LibreNMS 1.61-80-gcfd6c41
DB Schema 2020_03_24_0844_add_primary_key_to_device_graphs (160)
PHP 7.2.27
MySQL 5.5.60-MariaDB
RRDTool 1.4.8


[OK] Composer Version: 1.10.1
[OK] Dependencies up-to-date.
[OK] Database connection successful
[OK] Database schema correct
[WARN] Your local git contains modified files, this could prevent automatic updates.
You can fix this with ./scripts/github-remove
Modified Files:

RRDTool Command

rrdtool graph /tmp/YPk1Z3Uv3LSApChA -l 0 -u 100 -E --start 1585075800 --end 1585162200 --width 1152 --height 300 -c BACK#EEEEEE00 -c SHADEA#EEEEEE00 -c SHADEB#EEEEEE00 -c CANVAS#FFFFFF00 -c GRID#a5a5a5 -c MGRID#FF9999 -c FRAME#5e5e5e -c ARROW#5e5e5e -R normal -c FONT#000000 --font LEGEND:8:DejaVuSansMono --font AXIS:7:DejaVuSansMono --font-render-mode normal DEF:usage= AREA:usage#FFBBBB: COMMENT:‘Usage Now Ave Max\n’ LINE1.25:usage#cc0000:’ ’ GPRINT:usage:LAST:%6.2lf%s GPRINT:usage:AVERAGE:%6.2lf%s GPRINT:usage:MAX:%6.2lf%s\n COMMENT:\n --daemon unix:/run/rrdcached.sock
RRDTool Output

ERROR: mmaping file ‘’: Invalid argument

Warning: unlink(/tmp/YPk1Z3Uv3LSApChA): No such file or directory in /nre/librenms/includes/html/graphs/ on line 127

any help would be greatly appreciated.

Adding onto this: added this to our config.php file still same issues:

$config[‘install_dir’] = “/nre/librenms”;

To add onto this Cron jobs were all fixed as well:

Same Symptoms:

-bash-4.2$ cat /etc/cron.d/librenms

Using this cron file requires an additional user on your system, please see install docs.

33 */6 * * * librenms /nre/librenms/cronic /nre/librenms/ 1
*/5 * * * * librenms /nre/librenms/discovery.php -h new >> /dev/null 2>&1
*/5 * * * * librenms /nre/librenms/cronic /nre/librenms/ 16

          • librenms /nre/librenms/alerts.php >> /dev/null 2>&1
            */5 * * * * librenms /nre/librenms/poll-billing.php >> /dev/null 2>&1
            01 * * * * librenms /nre/librenms/billing-calculate.php >> /dev/null 2>&1
            */5 * * * * librenms /nre/librenms/check-services.php >> /dev/null 2>&1

Daily maintenance script. DO NOT DISABLE!

If you want to modify updates:

Switch to monthly stable release:

Disable updates:

15 0 * * * librenms /nre/librenms/ >> /dev/null 2>&1

We got everything working. Ended up that our cron just screwed with a lot of things. Also had a random python issue. We are good to go!