Server version: Apache/2.4.34 (Red Hat)
I am looking to put some health checks in place using mod_proxy_hcheck. I have a back-end tomcat application with two nodes that recently has had JVM heap issues and the application on one of the two nodes becomes unresponsive. However, the node will stay in the pool as a member since I assume the port on the node is still listening. Here's the current configuration:
<Proxy balancer://balancermanager>
BalancerMember
https://example.com:8443 route=node1 keepalive=On ping=3 ttl=90 timeout=60
BalancerMember
https://example.com:8443 route=node2 keepalive=On ping=3 ttl=90 timeout=60
ProxySet lbmethod=bybusyness
</Proxy>
If a request is sent to the bad node, after 60 seconds the timeout will trigger and return a Bad Gateway 504.
It doesn't seem that using something like this would make sense:
ProxyHCExpr gdown {%{REQUEST_STATUS} =~ /^[5]/}
Since the request would need to wait the 60 seconds to timeout and receive the 504.
Can anyone provide some guidance on best practices for creating health checks in this situation?
Thanks in advance,
HB
