I have setup a Drupal application on an High Available environment using PHP 8.1 w/ Amazon Linux 2023. The EB instances are running on a private subnet with a NAT for being able to access other VPC and Internet services. EB set up an Application Load Balancer. I setup port 80 w/ a rule to redirect the Protocol to HTTPS/443. I setup port 443 to forward to the target group of my EB instances. I configured Drupal's reverse proxy. I've also confirmed that the EB instances' security group allow for outbound access.
When I access the site, it loads fine on most pages. However, when I try to access the Drupal status report page, or do a search query, it times out with a 504 Gateway Time-Out error.
For the search engine, I have setup meilisearch on a separate AWS EC2 instance. I am able to access that instance from my EB instances and I've written test apps to connect to that instance and it works as expected.
I've tried moving the EB environment to a public subnet with public IP addresses. I've tried just accessing the site via HTTP. I've enabled ALB logs and don't see any information there. I've also looked at the logs on the EB instances and don't see anything there.
Does anyone have any ideas or pointers that could help?
AWS OFFICIALUpdated 2 years ago
I was able to log into my EB EC2 instance and run Drush to try to access the search engine and ran into a problem there:
So it does appear to be a networking issue between my EB EC2 instance and the search instance.