What are the reasons for the nginx configuration not taking effect?

There are several reasons why the nginx configuration may not take effect.

1. Syntax error: There is a syntax error in the configuration file, rendering it unable to be parsed.
2. Wrong path: The configuration file’s path is incorrect, nginx cannot find the correct configuration file.
3. Restart issue: The modification made to the configuration file did not take effect because the nginx service was not restarted.
4. Permission issue: The user running the nginx process does not have sufficient permissions to read the configuration file.
5. Issue with include directive: incorrect file path or file does not exist in the configuration file.
6. Cache issue: If using nginx’s reverse proxy feature, the problem may be caused by caching. You can try clearing the cache or disabling caching to resolve it.
7. Version issue: Different versions of nginx may have different configuration options or behaviors, which may result in ineffective configurations due to version mismatch.
8. Other issues: it could also be caused by other reasons, such as network problems, firewall configurations, etc. You can check the nginx log files to find more detailed error information.