We ran on this set up for a couple of years. We even migrated from linode to AWS ec2 instances (that was a fun problem!). To start with Galera was okay, but as

We ran on this set up for a couple of years. We even migrated from linode to AWS ec2 instances (that was a fun problem!). To start with Galera was okay, but as our traffic picked up things became sketchy. As traffic grew we'd encounter evermore outages - it seemed that some percentage of requests between nodes would be dropped (despite AWS's insistence to the contrary) and the nodes couldn't seem to gracefully recover. With the rapid growth, and tiny team we didn't have enough time to fully get to the bottom of it sadly. The final straw for Galera for us was when we started exploring multi-region replication (us-east-1 and Singapore). The bandwidth between regions was just not high enough to support a cluster. Aurora offered all that and more (though MariaDB to MySQL was a bit fiddly). Since migrating life (and uptime) has improved immeasurably.