Failed to discover available identity in OpenStack

Question

I have a little problem with OpenStack installation. When i use this:

openstack service list

the terminal return this error:

Failed to discover available identity versions when contacting 
http://controller:35357/v3. Attempting to parse version from URL.
Internal Server Error (HTTP 500)

what is the solution?

Answer 1

In my case, OS_CACERT env variable was missing

Example:

OS_CACERT=/etc/ssl/certs/Trust_Root.pem

Answer 2

Check if your open stack services are working.

ps -ef | grep stack