Seen on various job failure, e.g. :
https://storage.gra.cloud.ovh.net/v1/AUTH_dcaab5e32b234d56b626f72581e3644c/zuul_opendev_logs_702/651207/4/check/tripleo-ci-centos-7-undercloud-containers/70251d9/logs/undercloud/var/log/extra/failed_services.txt.gz
Dec 11 21:57:32 undercloud.localdomain systemd[1]: Starting tripleo_ironic_pxe_tftp healthcheck...
Dec 11 21:57:34 undercloud.localdomain podman[175256]: 2019-12-11 21:57:34.031867406 +0000 UTC m=+1.908984798 container exec c472357ee7db823ab5a82d98af421ca658e4751bd4c5c310c49d98b5f8acdadc (image=192.168.24.1:8787/tripleomaster/centos-binary-ironic-pxe:38c4e3104abdeb4699cfbe7a78fa2f37d7a863b4_93bde36c-updated-20191211203849, name=ironic_pxe_tftp)
Dec 11 21:57:34 undercloud.localdomain podman[175256]: curl: (6) Could not resolve host: nil; Unknown error
Dec 11 21:57:34 undercloud.localdomain podman[175256]: 000 :0 0.029 seconds
Dec 11 21:57:34 undercloud.localdomain podman[175256]: Error: non zero exit code: 1: OCI runtime error
The healthcheck fail because of a call to hiera:
bind_host=$(hiera ironic::pxe::tftp_bind_host)
running hiera without "-c" returns nil.
Fix proposed to branch: master /review. opendev. org/698719
Review: https:/