[SOLVED]-No Graphs - Poller runs - says it updates rrd files

[eholz1]

Hello Again,

I have a serious ouch here. Cacti-1.2.7, Linux red hat 7.5.
Running poller as 'cacti' not getting any errors, writing to a poller.log - just getting normal poller data
similar to the log file. All my log data iis green.

rrd files seem to be updated, rra folder is owned by cacti:apache. the rrd files are owned by cacti:apache

The datasource info shows data values, but no data in the rrd file or shows in the graphs.

What is broken here? I could try running the poller as root, but that does not sound good, as
the system was working before with the cacti user.

need some good suggestions on this,

Thanks,

eholz1

[Jeeves]

Has anyone else bumped into this? I just did with a nearly identical configuration.

[netniV]

Are you using the OS package version, the cacti package version or the source version?

[jtremblay]

sounds like my issues. I tried to upgrade from and old centos 6 to rhel 7 , from version 1.1.35 to 1.2.6. I get one graphing per every 6 hours .... sometimes.

[Jeeves]

Are you using the OS package version, the cacti package version or the source version?

I can't speak for the OP; However, mine are always source.
The upgrade routine doesn't flag any permissions issues (not to say things aren't wonky).

Now, I can't say that this is the cause, or that my permissions are anywhere near correct but my cacti installation has been working for a long time.
With this in mind I went digging and testing with my RRA directory.

It appears that my older rrd's are all cacti:apache 744.
New RRA's are created as cacti:cacti with 644.

I tried reverting /rra to cacti:apache & 644 (chmod -R 644 rra/) and I get errors such as:

2019/11/11 20:43:04 - CMDPHP ERROR: Unable to create directory '/usr/share/cacti/rra/5'
2019/11/11 20:43:04 - CMDPHP PHP ERROR WARNING Backtrace: (/poller.php[661]:process_poller_output(), /lib/poller.php[547]:rrdtool_function_update(), /lib/rrd.php[753]:rrdtool_function_create(), /lib/rrd.php[706]:mkdir(), CactiErrorHandler())
2019/11/11 20:43:04 - ERROR PHP WARNING: mkdir(): Permission denied in file: /usr/share/cacti/lib/rrd.php on line: 706
2019/11/11 20:43:04 - CMDPHP ERROR: Unable to create directory '/usr/share/cacti/rra/21'
2019/11/11 20:43:04 - CMDPHP PHP ERROR WARNING Backtrace: (/poller.php[661]:process_poller_output(), /lib/poller.php[547]:rrdtool_function_update(), /lib/rrd.php[753]:rrdtool_function_create(), /lib/rrd.php[706]:mkdir(), CactiErrorHandler())
2019/11/11 20:43:04 - ERROR PHP WARNING: mkdir(): Permission denied in file: /usr/share/cacti/lib/rrd.php on line: 706

Issuing (chmod -R 744 rra/) and all the errors disappear.

Based on RRA's being created as 644 (and 644's not being writable (or rather, throwing an error)) I'm guessing newly created RRD's aren't writable to cacti.

Cron is

*/1 * * * * cacti php -q /usr/share/cacti/poller.php > /dev/null 2>&1

Clearly i don't suspect it is an issue.

sounds like my issues. I tried to upgrade from and old centos 6 to rhel 7 , from version 1.1.35 to 1.2.6. I get one graphing per every 6 hours .... sometimes.

That doesn't sound like this issue. You should be able to troubleshoot that relatively simply. This problem does not involve a distro upgrade.

[eholz1]

Hello All,

I did solve this one. It turns out the permissions were completely messed up.
The cacti-1.2.7 dir, and the rra dir and the log dir somehow were changed (by me!),
and I could not reset or set them correctly. Lesson here is do not mess with the permissions!

In my case, since I had a virtual machine, AND a snapshot, I went back to the snapshot,
and DID not CHANGE anything.

My working version has apache:apache as main owner of the cacti chain, with cacti:apache set on the rra and the log directories.
I did have to set all to write for the log dir for some reason. apache could not write to that dir to update the log file.

Thanks,

Eholz1

[netniV]

I tried reverting /rra to cacti:apache & 644 (chmod -R 644 rra/) and I get errors such as:

2019/11/11 20:43:04 - CMDPHP ERROR: Unable to create directory '/usr/share/cacti/rra/5'
2019/11/11 20:43:04 - CMDPHP PHP ERROR WARNING Backtrace: (/poller.php[661]:process_poller_output(), /lib/poller.php[547]:rrdtool_function_update(), /lib/rrd.php[753]:rrdtool_function_create(), /lib/rrd.php[706]:mkdir(), CactiErrorHandler())
2019/11/11 20:43:04 - ERROR PHP WARNING: mkdir(): Permission denied in file: /usr/share/cacti/lib/rrd.php on line: 706
2019/11/11 20:43:04 - CMDPHP ERROR: Unable to create directory '/usr/share/cacti/rra/21'
2019/11/11 20:43:04 - CMDPHP PHP ERROR WARNING Backtrace: (/poller.php[661]:process_poller_output(), /lib/poller.php[547]:rrdtool_function_update(), /lib/rrd.php[753]:rrdtool_function_create(), /lib/rrd.php[706]:mkdir(), CactiErrorHandler())
2019/11/11 20:43:04 - ERROR PHP WARNING: mkdir(): Permission denied in file: /usr/share/cacti/lib/rrd.php on line: 706

Issuing (chmod -R 744 rra/) and all the errors disappear.

I suspect these errors are because you changed the RRA directory to believe it wasn't a directory. As such, you can't create new files/directories beneath it. If you did that on the advice of the installer, let me know as that needs looking into. Generally speaking, these days I prefer to use the flag format of u+rw to ensure I don't mess up the permissions of a directory over a file.

What I mean by believe it wasn't, without the execute permission, you tend not to be able to enter a directory.

[Jeeves]

I suspect these errors are because you changed the RRA directory to believe it wasn't a directory. As such, you can't create new files/directories beneath it. If you did that on the advice of the installer, let me know as that needs looking into. Generally speaking, these days I prefer to use the flag format of u+rw to ensure I don't mess up the permissions of a directory over a file.

What I mean by believe it wasn't, without the execute permission, you tend not to be able to enter a directory.

I symlinked my rra path, so that makes sense. Good to know!