In our case, our app relies a lot on the URL coming in to do different things (respond with different applications).Īnyway, to do the proxy thing, we simply go through each virtual host in our nf, put an entry in the /etc/hosts of the old machine to point to the new machine, and proxy over with mod_proxy:
You can’t just tell them “hey go here” unless you want to redirect them to an IP address, and that would only work if your server as the only guy on that IP, and that nothing had a domain in it, and that it didn’t have a domain piece.
You only want people going to ONE machine though, and as soon as you flip the switch, you want it to be the new machine.įor this to happen, you simply make sure that anyone finding their way to the old machine gets proxied through to the correct place.
#Serialz2000 download full#
There are some tricks such as taking the TTL down a notch (and making sure that gets through a cycle), but it will still take time for the full propogation. We all know that it can take roughly up to 24 hours or so for this to propogate through the internet. At some point you need to tell DNS that your server is actually at a new location. You will also probably want to setup your /etc/hosts file to point to the new machine to do some testing to make sure that there are not any URL gliches “it worked as but not when it was live at foo.com!”. Part of this will involve a test plan of things to check off. Of course, the first step was to have migrated the application to the new machine, and run the battery of tests to make sure all is well. Configure the old server for redirect mode.Get the app running on the old and new boxes.Note that we will use the term “old server” to mean the soon-to-be old server, and the “new server” to be the soon to be live and current server :) High level process Some of you will probably think that this is a no-brainer, but a few too many people were talking about sitting there doing the DNS switch and “waiting for people to migrate over” so I thought I would put up our process for moving.
They really go above and beyond.Īnyway, back to the move. Normally I never look forward to talking to “the hosting guys”, but ever since we have worked with Mathew Porter and his team, it has become a pleasure. I can’t say enough for the guys at Contegix. Last week I had to move a live heavily trafficed web application from a data center in south america, to a top class offering at Contegix.
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