Openstack undercloud upgrade/installation on 16.2 fails when undercloud public host and local IP values coincide

Solution Verified - Updated -


  • The FQDN undercloud_public_host value is resolved to the local_ip value in /home/stack/undercloud.conf:

    local_ip = <local IP address>
    undercloud_public_host = <public host FQDN> #resolved into <local IP address>
    undercloud_admin_host = <admin VIP>
  • The installation/upgrade process gets stuck at step 3 with the following logs:

    ERROR aodh oslo_db.exception.DBConnectionError: (pymysql.err.OperationalError (2003, "Can't connect to MySQL server on '<admin VIP>' ([Errno 113] No route to host)")


  • Red Hat OpenStack 16.2
  • keepalived v2.0.13 and later

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