Error creating rrd file: not writable

[benweltevrede]

Hello, I am trying to get nfsen-ng to work on Ubuntu 18.04 system. I followed the instructions but when I am trying to import nfdump files I get the message (in /var/log/syslog) nfsen-ng: Error creating /var/www/html/nfsen-ng/backend/datasources/data/1234.rrd: Not writable All the directories from /var/www down are owned by www-data and have rw privileges for www-data. What am I doing wrong?

[Dona21]

Hi, Did you try to run import with a "normal" user ? Try the import command again with sudo or with root user directly and let me know

[benweltevrede]

Hi, Yes I tried with normal user. If I log on using root I get the error message: nfsen-ng: Was not able to find /var/www/html/nfsen-ng/backend/datasources/data/test_53.rrd (for all rrd files) It did create files, they are owned by root.

[Dona21]

Just checked our test system and files are owned by root too, so it should not be a problem. the user www-data needs a read permission on files (to display it in the nfsen-ng frontend) which it seems to have in your case. do you see the erorr message in the logs or in the nfsen-ng frontend ? does your "/var/www/html/nfsen-ng/backend/datasources/data/" directory have the execute pemission for "other" users ?

[benweltevrede]

Thanks for your fast replies! I see the error messages in /var/log/syslog. Yes. The /var/www/html/nfsen-ng/backend/datasources/data/" directory has execute privileges for everyone. (The directories above it have them as well,)

[Dona21]

you are welcome, my pleasure to help (if I can). did you get this error while trying to start the daemon ? if yes, did you use a normal user ?

[benweltevrede]

Actually I did not start a daemon - just wanted to load existing files (there is no nfcapd daemon running on this machine) But I started the daemon - no error messages: nfsen-ng: CLI: Starting daemon...

[benweltevrede]

Succes! Not sure what I did, but I do get data on the graphs.

[Dona21]

in an attempt to furether help you, I:

• deployed a new VM and installed Ubuntu 18.04 server (from scratch) with the latest ISO available
• proceeded to follow instructions regarding nfsen-ng installation (everything done with root user)
• created a path to hold some nfcap files (still root) : mkdir -p /var/nfdump/profiles-data/live/source1/2019/09/13/ -> at this point permissions are set as drwxr-xr-x and ownership is rootfor the whole directory tree
• copied a subset of nfcap data from our production server to this new VM -> files ownsership:-rw-rw-r-- 1 root root 14K Sep 13 01:50 nfcapd.201909130345
• modified /var/www/html/nfsen-ng/backend/settings.php to hold only source1 (the rest is unchanged)
• cd /var/www/html/nfsen-ng/backend && sudo ./cli.php -f -p -ps import

it worked on my side so no clue

[Dona21]

Oh, I did not see your message. If it works then good news, I close the issue. Have a good day

[benweltevrede]

Thanks for your help! Much appreciated. Ben

From: Dona21 [mailto:notifications@github.com] Sent: Friday, September 13, 2019 3:23 PM To: mbolli/nfsen-ng Cc: benweltevrede; Author Subject: Re: [mbolli/nfsen-ng] Error creating rrd file: not writable (#30)

Oh, I did not see your message. If it works then good news, I close the issue. Have a good day

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