[Question] Does kgateway support failover backends?

[yongzhang]

Hi, team

Just to confirm, is there a "failover backend" concept in kgateway?

e.g. there're 2 backends, traffic goes to 1st (primary) backend normally, 2nd backend (failover) will route traffic only if the 1st backend fails HC, more importantly, if the 1st backend recovered, traffic should go back to the 1st.

By checking the docs, there's weighted routing, but is that can be used for this use case?

Thanks.