Re-running os-net-config nukes resolv.conf

[Harald Jensås]

Observerd in RDO CI jobs fs001 and fs039:

When overcloud nodes are deployed with '--network-config', i.e networking is configured as part of baremetal node provisioning. Then network config is then re-applied by the deploy-steps playbook. Result in empty resolv.conf[1]

When not running node provisioning with '--network-config' the resolv.conf[2] is ok.

Failing jobs have a backup config[3] in /etc/os-net-config, both configs have the correct dns_servers.

[1] ...
- https://logserver.rdoproject.org/76/798276/4/openstack-check/tripleo-ci-centos-8-ovb-3ctlr_1comp-featureset001/70e562f/logs/overcloud-controller-0/etc/resolv.conf.txt.gz
- https://logserver.rdoproject.org/76/798276/4/openstack-check/tripleo-ci-centos-8-ovb-3ctlr_1comp-featureset001/70e562f/logs/overcloud-controller-0/etc/resolv.conf.txt.gz

[2] ...
- https://logserver.rdoproject.org/76/798276/6/openstack-check/tripleo-ci-centos-8-ovb-3ctlr_1comp-featureset001/bfe17b8/logs/overcloud-controller-0/etc/resolv.conf.txt.gz
- https://logserver.rdoproject.org/76/798276/6/openstack-check/tripleo-ci-centos-8-ovb-3ctlr_1comp_1supp-featureset039/994cbc2/logs/overcloud-controller-0/etc/resolv.conf.txt.gz

[3] https://logserver.rdoproject.org/76/798276/4/openstack-check/tripleo-ci-centos-8-ovb-3ctlr_1comp-featureset001/70e562f/logs/overcloud-controller-0/etc/os-net-config/

[Harald Jensås (harald-jensas)]

Looks like the actual problem is that different templates are used for the two os-net-config runs.

[OpenStack Infra (hudson-openstack)]

Related fix proposed to branch: master
Review: https://review.opendev.org/c/openstack/tripleo-quickstart-extras/+/799619

[Kevin Carter (kevin-carter)]

I am seeing a similar issue when running deploy. Networks are configured when the nodes are provisioned, then during the deploy os-net-config is being invoked and results in the following stack: http://paste.openstack.org/show/807428

These are the templates I'm using - https://github.com/cloudnull/tripleo-deployment-templates

I've tried running provisioning with and without network-config, and it all results in the same thing. Interestingly, the first run results in a correctly configured node, the second run breaks os-net-config and in some cases, breaks networking to the node.

[OpenStack Infra (hudson-openstack)]

Change abandoned by "Harald Jensås <email address hidden>" on branch: master
Review: https://review.opendev.org/c/openstack/tripleo-quickstart/+/763500
Reason: See review comments on https://review.opendev.org/c/openstack/tripleo-quickstart/+/800173

[OpenStack Infra (hudson-openstack)]

Change abandoned by "Harald Jensås <email address hidden>" on branch: master
Review: https://review.opendev.org/c/openstack/tripleo-quickstart-extras/+/799619