Nagios Support Forum

After confirming successfully backups and snapshot, I attempted Nagios xi upgrae from 5.8.5 to 5.8.7 and it failed to complete with the last message stating:

INSTALL: POST-INSTALL: MRTG post install is running...
./post_install: line 20: python: command not found

When searching for post_install from command line, I see the following file / permissions:

[root@pv02948 ~]# ls -ld /usr/local/nagiosxi/tmp/nagiosxi/subcomponents/mrtg/post_install
-rwxr-xr-x 1 root root 1087 Nov 1 11:36 /usr/local/nagiosxi/tmp/nagiosxi/subcomponents/mrtg/post_install

Can you please help to advise why this is failing and how to best proceed.

Thank you.

The post_install script uses python for the MRTG configuration file updates and it cannot find the python application on the server.

The python application is a link to either Python 2 or 3 depending on what version is installed on the server.

To create the link for Python 2, you would run this as root.
For Python 3, run this.
After creating the link, re-run the xi upgrade to see if it finishes.

Thank you.

Thank you for the quick feedback. Your recommendations worked, and our upgrade on the Nonprod Nagios xi instance was successful. We will move forward with updating our Prod system next week. Thank you for your support.

Your welcome, glad it worked. Let us know if you have any further questions or issues.