Overcloud deployment fails with "InvalidConfigException: Address JSON objects require 'ip_netmask' to be configured"

Solution Verified - Updated -


  • Management network doesn't get ip_netmask from the allocation pool due to which the deployment fails. This can be noticed in /etc/os-net-config/config.json.

    [stack@undercloud-0 ~]$ cat /etc/os-net-config/config.json | python -m json.tool
       "addresses": [
                          "ip_netmask": ""


  • Red Hat OpenStack Platform 13.0
  • RHEL 7.x

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