Does FusionAuth support high availability database configurations?
-
With a primary/secondary and replication, to ensure availability of the user identity management service?
-
Yes. We don't have any specific guidance around using MySQL and PostgreSQL in an high availability configuration. However, it should work. This document discusses the various possible architectures at a high level: https://fusionauth.io/docs/v1/tech/installation-guide/server-layout
It is worth noting that MySQL group replication will not work. It requires a primary key on each table. We do not meet this requirement and have no plans to adjust the schema for this style of replication to work. Other types of replication that do not require a PK on every table should work.
The particulars of DB clustering are outside of the scope of what we can assist with, however.
-
@dan there's one important case not covered in those docs - a high-availability database configuration with a single write-instance and one (or many) read-instances (or replicas.)
Does FusionAuth support this? Typically support means that read-only queries are routed to this read-replica by the application, in order to reduce querying load on the primary write instance.
