Undercloud installation fails with TASK of Container image prepare in environment under proxy

Solution In Progress - Updated -


  • Failure to obtain container image during container preparation process executed when installing undercloud.
  • "Error running container image prepare: check_hostname requires server_hostname" is displayed and fails during undercloud installation.
2022-10-23 23:20:06.830956 | 52540076-3487-4607-a2e7-0000000013f6 |       TASK | Container image prepare
2022-10-23 23:20:08.437900 | 52540076-3487-4607-a2e7-0000000013f6 |      FATAL | Container image prepare | undercloud-0 | error={"changed": false, "error": "check_hostname requires server_hostname", "msg": "Error running container image prepare: check_hostname requires server_hostname", "params": {}, "success": false}
  • Undercloud connects to the Internet via proxy, which is configured in /etc/environment as follows.


  • Red Hat OpenStack Platform 17.0
  • python3-urllib3 version 1.26 or higher

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