"Gateway Timeout (HTTP 504)" Reported During OpenStack Command Execution

Symptom

The following error message is displayed when the OpenStack commands are executed:

1
2

Failed to discover available identity versions when contacting http://controller:5000/v3. Attempting to parse version from URL.
Gateway Timeout (HTTP 504)

Key Process and Cause Analysis

A proxy that affects HTTP requests exists in the environment.

Run the following command to check environment variables:

env

Conclusion and Solution

Remove the proxy in the environment based on the actual configuration.

1. Run the following command to temporarily remove https_proxy and http_proxy from the environment:

   unset https_proxy http_proxy