OpenStack Error Unable to establish connection to http://controller:35357/v3/services

Use the OpenStack command to make the discovery of each command appear unable to establish connection to http://controller:35357/v3/services

[Root@controller ~]# OpenStack Service Create   --name Keystone--description "OpenStack Identity" identity
Unable to establish connection to http://controller:35357/v3/services
[root@controller ~]# OpenStack Service list< C3/>unable to establish connection to http://controller:35357/v3/services

Check Port Discovery 35357 and 5000 did not start

[Root@controller ~]# Ss-ntl | Grep-e "5000|35357"
[Root@controller ~]# 

These two ports correspond to the HTTPD service

Just restart Apache

[Root@controller ~]# systemctl restart Httpd.service
[root@controller ~]# ss-ntl | grep-e "5000|35357"
LISTEN
  0::         :,:                    :* LISTEN 0:::         35357                   :::*                  
[Root@controller ~]# OpenStack Service Create   --name Keystone--description "OpenStack identity" identity
+-------------+------- ---------------------------+
| Field       | Value                            |
+-------------+----------------------------------+
| description | OpenStack Identity               |
| enabled     | True                             |
| id |          B9CE620F5BC94CA49756F271466D6D2D |
| name        | Keystone                         |
| type        | Identity                         |
+-------------+----------------------------------+