We have a pretty basic load balancing setup with 3 web servers behind a load balancer connected to the same db server and pointing their wp-content/uploads folder to an nfs share.
We have the first server rsynching the wordpress files across the other 2 in a cron job to keep the servers in sync (all wp-admin stuff is done on the first server)
I’m wondering what the best way is to upgrade the entire cluster at once with minimal downtime.
If I update wordpress on the first server, will the db versioning cause the other 2 servers to stop working? Or can I just update the first server then rsync the files across without any downtime?
2 Answers
I don’t think the database schema ever changes so drastically that the versions of wordpress on box 2 + 3 would be prevented from reading from the DB after you’ve updated on box 1, however it depends what version you are upgrading from.
Why not set a similar environment locally and test upgrading site 1, while still trying to visit site 2.
