errbit | The open source error catcher that 's Airbrake API compliant | Dashboard library

I got a small issue and hope someone can enlighten me how I can fix this issue with my Development Environment.

I am using MacOS which is, wenn using docker with shared folders, poor in performance.

I originally used an intermediate docker container with unison synchronisation but had issues with it. (Sync stopped unpredictable without any error output or so on)

I created an virtual machine in which I boot up docker. In it I only have a minimal setup with a small php and nginx configuration. (for executing code generation from within the host development IDE). Nginx is configured to forward https to http requests from within the docker containers. (and to get rid of the 80xx ports.

Vagrant doesn't forward any ports and is accessible via the nginx server only from port 80 and 443.

Within docker I have one self compiled nginx container (with several plugins for additional functions like serving compressed files (which lie next to the uncompressed content)etc.), several php7.1-fpm instances, queue worker, mysql master slave database etc. The Environment is built like our productive system. It's important for us to be as close as possible.

The only core difference is the first nginx that sits in between my host and the vm for routing etc.

My Core issue is currently that a request to the first nginx server is extremly slow and I don't really have a clue why. In the Browser Inspector I can see 6 States of the Connection:

1. Queued (0s)
2. Stale (5-15s)
3. Resolving Domain (5-30s)
4. Request Sent (0.000077s)
5. Waiting for Response (0.2s)
6. Downloading Response (0.0009s)

My biggest problem currently on working is step 2 and 3 which only appear within the first connection and every ongoing connection which is delayed longer then 1 minute after the last request.

What I also don't get is why it tries to resolve the domains.

But first things first. Heres an part of my vagrant setup (only the important Parts: