Fresh install cacti. Why this error? +deb based

[dmz]

The thing is:
-I'm on a raspberry pi 3 b+ with raspbian stretch. Since using:

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sudo apt install cacti

only allows me to install the 0.8.8 version, I figured it would be better if I follow a tutorial for installing from source, so I could get cacti 1.1.38.

-Followed every step in there. Weird that in a virtual machine with raspbian stretch, when importing cacti database with this step, it was only 3 seconds:

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mysql -u root -p cacti < /opt/cacti/cacti.sql

But in raspbian it actually let the terminal hanged. But no problem(I think) since It copied at least ~3.9Mb.

-The tutorial said to do this

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nano /etc/crontab
Add: */5 * * * * www-data php /<cacti-path>/cacti/poller.php > /dev/null 2>&1

-Instead of that, I did

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crontab -e 
Add: */5 * * * * www-data php /<cacti-path>/cacti/poller.php > /dev/null 2>&1

Followed the tutorial, installed cacti, but I got the typical error

Error opening '/<cacti-path>/cacti/rra/*.rrd No such file or directory

Like this image:https://user-images.githubusercontent.c ... 2fa6e2.png

Since I used cacti too for a school project and the poller was the source of near all my problems (the new graphs didn't create unless I started the poller from root terminal, but afterwards they were updating with no problems), I did

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sudo /usr/bin/php /opt/cacti/poller.php

And the graphs appeared.

The problem is, now I have all this rubish in my crontabs

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#in crontab -e
*/1 * * * * www-data php /opt/cacti/poller.php > /dev/null 2>&1
*/1 * * * * cactiuser php /opt/cacti/poller.php > /dev/null 2>&1
#in /etc/crontab
*/1 * * * * root /usr/bin/php /opt/cacti/poller.php > /dev/null 2>&1

The graphs keep updating but I don't know which crontab is updating succesfully. I didn't create a cacti user for terminal, but I read it's neccessary to create a 'cactiuser' since the crontab needs to have a 'cactiuser' user doing the polling.

[netniV]

I am assuming that you understood to replace <cacti_path> with the actual path to cacti, eg, /usr/share/cacti/ ? Also, for debian based installs, Paul Gever's produces the packages for that. I guess whether you see it or not would depend on the version of debian being installed.

Check the following two links for the two cacti packages:
https://tracker.debian.org/pkg/cacti-spine
https://tracker.debian.org/pkg/cacti

[paulgevers]

Replacing cacti installed from a deb package by a version from this site isn't trivial. I recommend removing any trace from the Debian package before installing the version from here: $(apt purge cacti). Please make sure that the MySQL database and user are also removed.

That said, I provide backports. See the link in my signature. Should work on Rasbian as well as far as I know.

[robvas]

The thing is:
The problem is, now I have all this rubish in my crontabs

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#in crontab -e
*/1 * * * * www-data php /opt/cacti/poller.php > /dev/null 2>&1
*/1 * * * * cactiuser php /opt/cacti/poller.php > /dev/null 2>&1
#in /etc/crontab
*/1 * * * * root /usr/bin/php /opt/cacti/poller.php > /dev/null 2>&1

The graphs keep updating but I don't know which crontab is updating succesfully. I didn't create a cacti user for terminal, but I read it's neccessary to create a 'cactiuser' since the crontab needs to have a 'cactiuser' user doing the polling.

/var/log/cron.log should tell you the user which the cron job runs as

Mine has this:

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Dec  4 12:20:02 devel CROND[83551]: (cacti) CMD (/usr/bin/php /usr/share/cacti/poller.php > /dev/null 2>&1)

[netniV]

The thing is:
The problem is, now I have all this rubish in my crontabs

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#in crontab -e
*/1 * * * * www-data php /opt/cacti/poller.php > /dev/null 2>&1
*/1 * * * * cactiuser php /opt/cacti/poller.php > /dev/null 2>&1
#in /etc/crontab
*/1 * * * * root /usr/bin/php /opt/cacti/poller.php > /dev/null 2>&1

The graphs keep updating but I don't know which crontab is updating succesfully. I didn't create a cacti user for terminal, but I read it's neccessary to create a 'cactiuser' since the crontab needs to have a 'cactiuser' user doing the polling.

/var/log/cron.log should tell you the user which the cron job runs as

Mine has this:

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Dec  4 12:20:02 devel CROND[83551]: (cacti) CMD (/usr/bin/php /usr/share/cacti/poller.php > /dev/null 2>&1)

I would imagine your poller is being run three times concurrently by three different users. As with Highlander, there can be only one! Pick one and remove the others. If you are using the debian/ubuntu packages, I believe that should be cacti. IMHO, root should never be used to run the poller and if using spine, that will normally be configured with SetUID bit and drop privileges itself (as it needs them for ICMP ping).

[paulgevers]

Debian packages don't use anything from /opt/ so this isn't from any Debian package. In our packages the user which runs the cron is www-data:

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paul@testavoira ~ $ cat /etc/cron.d/cacti 
MAILTO=root
*/5 * * * * www-data php /usr/share/cacti/site/poller.php 2>&1 >/dev/null | if [ -f /usr/bin/ts ] ; then ts ; else tee ; fi >> /var/log/cacti/poller-error.log