Useful Health Check Endpoints in PHP Applications

At PMG we run pretty much every application in AWS's Elastic Container Service with web entrypoint handled by Application Loader Balancers. One feature of the ALB and ECS is that web-based services do a blue/green deployment. When a new version of the application is shipped, it spins up a new container in the ECS cluster… Continue reading Useful Health Check Endpoints in PHP Applications

What is Self in a Service Worker?

After researching service workers a bit, none of the tutorials seem to explicitly state what self actuall is. It's a ServiceWorkerGlobalScope implementation. The events passed to the install and activate listeners are ExtenableEvent implementations. This is where the waitUntil method comes from to force an event listener to wait until a promise resolves. The install… Continue reading What is Self in a Service Worker?

How to Connect to the Host Machine from a Container on Docker for Mac

I was recently working on a mac-based dev environment and need to proxy from a container running nginx (to handle HTTPS connections) to a server running on the host machine. Docker's host network mode does not work on MacOS as expected given that docker is running inside a VM rather than directly in the host's… Continue reading How to Connect to the Host Machine from a Container on Docker for Mac

Redirecting HTTP Requests on an HTTPS Listener in Nginx (Status Code 497)

Nginx has a bunch of custom https status codes that it uses internally to signal issues. One such status code is 497: the client made an http request on an https listener. These custom status codes can be used in combination with an error_page directive which can be used to redirect. This will send a… Continue reading Redirecting HTTP Requests on an HTTPS Listener in Nginx (Status Code 497)

Symfony Logout Handlers vs Logout Success Handlers

Symfony's security configuration for logout functionality in a firewall has a few handler keys that are worth digging into: Logout Handlers These are defined in the handlers key of the configuration above and the classes behind the listed services must implement LogoutHandlerInterface. Logout handlers should perform actions related to logging the user out. For example,… Continue reading Symfony Logout Handlers vs Logout Success Handlers