Hi all,
Have some old machines to upgrade, would like to know the best way to avoid the least amount of downtime. I understand I can do a straight upgrade of CentOS6 to Centos7 then to CloudLinux7 but it would be much riskier than moving to a fresh server. Just can't figure out how to minimise downtime when the DNS points to different IPs especially for mail servers.
Thanks!
Have some old machines to upgrade, would like to know the best way to avoid the least amount of downtime. I understand I can do a straight upgrade of CentOS6 to Centos7 then to CloudLinux7 but it would be much riskier than moving to a fresh server. Just can't figure out how to minimise downtime when the DNS points to different IPs especially for mail servers.
Thanks!