Merge branch 'db_lb_new_connection_on_worker_boot' into 'master'

Create new set of LB hosts on worker boot

See merge request gitlab-org/gitlab!63485

config/initializers/load_balancing.rb

@@ -11,6 +11,9 @@ if Gitlab::Database::LoadBalancing.enable?
 
   # This needs to be executed after fork of clustered processes
   Gitlab::Cluster::LifecycleEvents.on_worker_start do
+    # For Host-based LB, we need to re-connect as Rails discards connections on fork
+    Gitlab::Database::LoadBalancing.configure_proxy
+
     # Service discovery must be started after configuring the proxy, as service
     # discovery depends on this.
     Gitlab::Database::LoadBalancing.start_service_discovery