Refresh takes me to a 404-CodePudding

Can anyone help me? I deployed the App Service in Azure Portal but the page refresh takes me to a 404 error. I adjusted the Nginx configs but they are overwritten over time. What am I doing wrong?

CodePudding user response：

App Service Always On generate periodic (every 5min) probes to app instances and causing failed requests with error 404, and this can be found in Application Insights as below:

enter image description here

This can be fixed by rewriting the Always on path.

After a cold start of your application, AlwaysOn will send a request to the ROOT of your application “/”.

Whatever file is delivered when a request is made to / is the one which will be warmed up, which will fail because the root doesn’t exist.

If you wanted AlwaysOn to warmup a specific page instead of the root, then you can implement this URL Rewrite rule.

<?xml version="1.0" encoding="UTF-8" standalone="no">
<configuration>
    <system.webServer>
      <rewrite>
        <rules>
          <rule name="Rewrite AlwaysOn" stopProcessing="true">
            <match url="^$" />
            <conditions>
              <add input="{HTTP_USER_AGENT}" pattern="^AlwaysOn$" />
            </conditions>
            <action type="Rewrite" url="/api/Online/Ping" />
          </rule>
        </rules>
      </rewrite>
    </system.webServer>
</configuration>