Add Note - Ajax 504 Error with FPM in Kubernetes

Environment:

• Azure Kubernetes Services
• Two containers in the pod:
  • Apache
  • PHP-FPM

When adding a note, on save, Ajax errors out with a 504 Gateway Timeout.

When running in AKS without FPM, the error does not occur. Note that in a previous non-containerized environment, we used Apache and PHP-FPM on the same server and no error occurred. However, AKS/Docker-based deployment requires that Apache and PHP-FPM run in separate containers in the pod.

We are running two sites with this configuration and both are raising the same error. One of the sites is a large, complex site with a number of contrib and custom modules, but this is the only function where this Ajax 504 is occurring.

The Ingress is running on nginx. We have attempted increasing the proxy-read-timeout on the ingress but it did not resolve the issue; it merely increased the time until the 504 was returned.