Docker Remote Debugging

• in vscode, trigger command "create a launch.json file"
• choose python, then Remote Attach :

{
  "version": "0.2.0",
  "configurations": [
    {
      "name": "Python: Remote Attach",
      "type": "python",
      "request": "attach",
      "connect": {
        "host": "localhost",
        "port": 5678
      },
      "pathMappings": [
        {
          "localRoot": "${workspaceFolder}",
          "remoteRoot": "."
        }
      ],
      "justMyCode": true // add this to debug libraries
    }
  ]
}

• launch container : docker compose -f compose.local.yml:compose.local.debug.yml up -d (or export COMPOSE_FILE=compose.local.yml:compose.local.debug.yml)
• add a breakpoint where you need
• on vscode, go to the debug pannel and click on the start button
• got to localhost:8000 and do the action needed to trigger the breakpoint

source : article