问题
Is it possible to run PostgreSQL as a service inside an OpenShift cluster and get external traffic to it via an exposed route (the recommended default way for communicating from the outside)?
The OpenShift 3.9 documentation states this:
A router is configured to accept external requests and proxy them based on the configured routes. This is limited to HTTP/HTTPS(SNI)/TLS(SNI), which covers web applications.
PostgreSQL can to SSL and it can be configured to listen on port 443 (HTTPS), but I think it cannot do SNI yet. I would only run a single pod behind the service, so load balancing should not cause issues. If feasible, I would expect to connect into the cluster and to the service with psql -h ....
回答1:
I have come to the (preliminary) conclusion that OpenShift port forwarding (oc port-forward) offers the best way (well ... :) forward in this situation.
回答2:
You can create a LoadBalancer service which will create a load balancer dedicated to just your pods, and this load balancer accepts TCP based traffic: https://docs.openshift.com/container-platform/3.9/admin_guide/tcp_ingress_external_ports.html#unique-external-ips-ingress-traffic-configure-service
So something like
oc expose dc postgres --type=LoadBalancer --name=postgres-lb
Would get you a publicly accessible PostgreSQL DB
来源：https://stackoverflow.com/questions/52405186/can-postgresql-service-in-openshift-cluster-receive-external-traffic-via-exposed