We are still hitting this randomly:-

https://logserver.rdoproject.org/openstack-periodic-integration-main/opendev.org/openstack/tripleo-ci/master/periodic-tripleo-ci-centos-9-ovb-3ctlr_1comp-featureset035-master/85376db/job-output.txt
~~~

2022-08-18 01:59:36.761993 | LOOP [configure-mirrors : Update yum/dnf cache]
2022-08-18 01:59:37.607884 | primary | 28 files removed
2022-08-18 02:01:16.428508 | primary | Loaded plugins: builddep, changelog, config-manager, copr, debug, debuginfo-install, download, generate_completion_cache, groups-manager, needs-restarting, playground, repoclosure, repodiff, repograph, repomanage, reposync
2022-08-18 02:01:16.428645 | primary | DNF version: 4.12.0
2022-08-18 02:01:16.428680 | primary | cachedir: /var/cache/dnf
2022-08-18 02:01:16.428707 | primary | Making cache files for all metadata files.
2022-08-18 02:01:16.428734 | primary | baseos: has expired and will be refreshed.
2022-08-18 02:01:16.428758 | primary | appstream: has expired and will be refreshed.
2022-08-18 02:01:16.428781 | primary | crb: has expired and will be refreshed.
2022-08-18 02:01:16.428803 | primary | extras-common: has expired and will be refreshed.
2022-08-18 02:01:16.428826 | primary | repo: downloading from remote: baseos
2022-08-18 02:01:16.428849 | primary | error: Curl error (6): Couldn't resolve host name for http://mirror.regionone.vexxhost-nodepool-tripleo.rdoproject.org/centos-stream/9-stream/BaseOS/x86_64/os/repodata/repomd.xml [Could not resolve host: mirror.regionone.vexxhost-nodepool-tripleo.rdoproject.org] (http://mirror.regionone.vexxhost-nodepool-tripleo.rdoproject.org/centos-stream/9-stream/BaseOS/x86_64/os/repodata/repomd.xml).
2022-08-18 02:01:16.428873 | primary | error: Curl error (6): Couldn't resolve host name for http://mirror.regionone.vexxhost-nodepool-tripleo.rdoproject.org/centos-stream/9-stream/BaseOS/x86_64/os/repodata/repomd.xml [Could not resolve host: mirror.regionone.vexxhost-nodepool-tripleo.rdoproject.org] (http://mirror.regionone.vexxhost-nodepool-tripleo.rdoproject.org/centos-stream/9-stream/BaseOS/x86_64/os/repodata/repomd.xml).
2022-08-18 02:01:16.428897 | primary | error: Curl error (6): Couldn't resolve host name for http://mirror.regionone.vexxhost-nodepool-tripleo.rdoproject.org/centos-stream/9-stream/BaseOS/x86_64/os/repodata/repomd.xml [Could not resolve host: mirror.regionone.vexxhost-nodepool-tripleo.rdoproject.org] (http://mirror.regionone.vexxhost-nodepool-tripleo.rdoproject.org/centos-stream/9-stream/BaseOS/x86_64/os/repodata/repomd.xml).
2022-08-18 02:01:16.428930 | primary | error: Curl error (6): Couldn't resolve host name for http://mirror.regionone.vexxhost-nodepool-tripleo.rdoproject.org/centos-stream/9-stream/BaseOS/x86_64/os/repodata/repomd.xml [Could not resolve host: mirror.regionone.vexxhost-nodepool-tripleo.rdoproject.org] (http://mirror.regionone.vexxhost-nodepool-tripleo.rdoproject.org/centos-stream/9-stream/BaseOS/x86_64/os/repodata/repomd.xml).
2022-08-18 02:01:16.428957 | primary | CentOS Stream 9 - BaseOS 0.0 B/s | 0 B 01:38
2022-08-18 02:01:16.428982 | primary | Errors during downloading metadata for repository 'baseos':
2022-08-18 02:01:16.429007 | primary | - Curl error (6): Couldn't resolve host name for http://mirror.regionone.vexxhost-nodepool-tripleo.rdoproject.org/centos-stream/9-stream/BaseOS/x86_64/os/repodata/repomd.xml [Could not resolve host: mirror.regionone.vexxhost-nodepool-tripleo.rdoproject.org]
2022-08-18 02:01:16.429031 | primary | Error: Failed to download metadata for repo 'baseos': Cannot download repomd.xml: Cannot download repodata/repomd.xml: All mirrors were tried
2022-08-18 02:01:16.445201 |

~~~