Troubleshooting Tip: Upgrade to v7.5.1 fails with 'Could not resolve host: os-pkgs-cdn.fortisiem.fortinet.com'

Description

This article describes how to fix the error 'Could not resolve host: os-pkgs-cdn.fortisiem.fortinet.com'.

Scope

FortiSIEM.

Solution

When the following error 'Could not resolve host: os-pkgs-cdn.fortisiem.fortinet.com' is met at the 'upgrade : UPGRADE | Upgrade Rocky Linux 8 to Rocky Linux 9 ...| localhost | FAILED' step, mostly noticed on the Azure platform, revert the node to the previous state using a snapshot and apply the next workaround before upgrading to v7.5.1.

After having unzipped the 'FSM_Upgrade_All_7.5.1_build0620.zip' with:

cd /opt/upgrade

7za x FSM_Upgrade_All_7.5.1_build0620.zip

Transfer the attached file in /tmp, then from FortiSIEM node CLI as root:

rm -rf /opt/upgrade/FSM_Upgrade_All_7.5.1_build0620/install/files/upgrade_rocky8_to_rocky9.sh

cd / 

tar -xzvf /tmp/upgrade_rocky8_to_rocky9.sh.zip 

chmod 755 /opt/upgrade/FSM_Upgrade_All_7.5.1_build0620/install/files/upgrade_rocky8_to_rocky9.sh

Then continue the upgrade process.