Debugging PolarDNS

Because of the way modularity is implemented in PolarDNS, a specific method must be used when debugging.

To debug PolarDNS, it’s important to set breakpoints in the generated polardns_real.py file rather than the polardns/core.py file.

For example, once running PolarDNS in the PyCharm debugger, simply open the polardns_real.py file and set your breakpoints there to debug your code.

Here’s a step-by-step procedure to confirm that you can debug it:

1. Click Debug 'polardns' in PyCharm
2. Open the polardns_real.py file
3. Set a breakpoint in the process_DNS() function
4. Send a DNS query to your PolarDNS instance, e.g. dig always.yourdomain.com @127.0.0.1
5. This should immediately trigger your breakpoint

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