Upgrade to SolusVM with PHP 7.3 fails: Cannot find a valid baseurl for repo: ius

Symptoms 

• Manual upgrade to SolusVM with PHP 7.3 on the slave node fails with the error:

  CONFIG_TEXT: Something went wrong, check /var/log/yum.log

• When trying to install SolusVM repo there is the following error:

  # yum install solusvm-release
  Loaded plugins: fastestmirror
  Setting up Install Process
  Determining fastest mirrors
  epel/metalink | 16 kB 00:00
  Could not retrieve mirrorlist https://mirrors.iuscommunity.org/mirrorlist?repo=ius-centos6&arch=x86_64&protocol=http error was
  14: PYCURL ERROR 6 - "Couldn't resolve host 'mirrors.iuscommunity.org'"
  Error: Cannot find a valid baseurl for repo: ius

Cause

The repository ius is not available.

Resolution

1. Connect to affected node via SSH
2. Disable repository by setting the directive enabled=0 in /etc/yum.repos.d/ius.repo file
3. Run the upgrade once again:

   # /bin/bash /usr/local/solusvm/tmp/update/php_updater.sh