Hi,

I have two Linux servers with Plesk installed (Debian and CentOS) with different IPs.

I want to migrate websites with minimal down time. Therefore I wish to find a way to avoid waiting for DNS propagation.

Scenario is as follow (example IPs):

Website 1 on Server 1: 192.168.0.10 (shared)
Website 2 on Server 1: 192.168.0.10 (shared)

I wish to migrate website 1 to Server 2 with IP 192.168.0.11

As soon as the migration is done, I want all incomming traffic to 192.168.0.10 for website 1 captured and redirected to Server 2 on IP 192.168.0.11.

from my comprehension, I need therefore to capture the combination of traffic and site header. How can I do that, and obviously keep traffic to Website 2 comming to 192.168.0.10 ?

iptables

http://serverfault.com/questions/371...ip-no-downtime

You just did the mistake I expected...

Your solution will redirect all traffic.... But I have many websites on the same IP and I don't want to redirect all.

no other idea ?

Set your DNS TTL very low.
Add a DNS entry for your new server as ww2.yourdomain.com
On new server set up apache as SERVER NAME www.yourdomain.com / SERVER ALIAS ww2.yourdomain.com
On old server set up .htaccess redirect to redirect everything to www2.yourdomain.com
Change dns so that www.yourdomain.com points to your NEW server

This means that anything that sees the NEW IP address will just read off the new server, anything that sees the OLD IP address will read a redirect to ww2 from the old server which will force a query to find ww2 from DNS.

Leave this all in place for a few days and then remove the ww2 entries.

As with anything DNS based, your mileage may vary and some users may experience an outage, it's just an unfortunate effect that some DNS servers do not respect standards with regards to TTL.

*facepalm*
Of course. I knew that when I started thinking about your problem, but somewhere along the line I got lost and forgot. Sorry about that. Still pondering.

My first thought was using a RewriteRule in httpd.conf to redirect traffic but I didn't find any examples of RewriteRule with IP numbers, only with host names. Ran out of time after getting distracted by the iptables idea... but have you looked into RewriteRule as an option?