Keystone Fails to Start and Produces Error "Unable to establish connection" During Authorization Attempt in OpenStack Platform 5.0 on Red Hat Enterprise Linux
Issue
Keystone uses port 35357, which is within the default ephemeral port range. This means that a program making outgoing connections on the Keystone system could randomly make use of port 35357 and block the Keystone service from starting.
Environment
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat OpenStack Platform 5.0
- Keystone
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