I'm using logical decoding in my application to capture change streams and ship them to Kafka. However, logical replication slots aren't included in the WAL and thus don't make it to replicas. In the case of a failover, it's not clear what (if anything) can be done to continue receiving a change stream.
I noticed there was a failover slot patch that looks like it won't be making it for 9.6 (if at all), but does anyone else have suggestions for handling failover + logical decoding? Is there an answer, or is it limited to being a very manual process for now?
Yes, as of i know, It is a manual process for now. Another alternative you can consider (if possible at all) would be a tool like PgPool-II which is actually used for connection pooling, load balancing and automatic failover. It may not make sense if you are do not wish to pool you connections.
