Bug 2090733

Description of problem:
The following command for overcloud export "openstack overcloud export --force-overwrite --stack central --output-file /home/stack/central-export.yaml" does not export GlobalConfigExtraMapData which includes oslo_messaging_rpc_password and DCN stacks deployed with such export template fail on:

 FATAL | Create containers managed by Podman for /var/lib/tripleo-config/container-puppet-config/step_1 | dcn1-compute1-1 | error={"changed": false, "msg": "Failed containers: container-puppet-nova_libvirt, container-puppet-neutron"}
2022-05-25 22:41:10.859379 | 5254009d-ecd7-8e41-490a-0000000072d2 |     TIMING | tripleo_container_manage : Create containers managed by Podman for /var/lib/tripleo-config/container-puppet-config/step_1 | dcn1-compute1-1 | 0:16:57.924690 | 8.43s
2022-05-25 22:41:11.382297 |                                      |    WARNING | ERROR: Can't run container container-puppet-nova_libvirt
stderr: + logger -s -t puppet-user
+ /usr/bin/puppet apply --summarize --detailed-exitcodes --color=false --modulepath=/etc/puppet/modules:/usr/share/openstack-puppet/modules --tags '"file,file_line,concat,augeas,cron,nova_config,libvirtd_config,virtlogd_config,nova_config,file,libvirt_tls_password,libvirtd_config,nova_config,file,libvirt_tls_password"' /etc/config.pp
<13>May 25 22:41:04 puppet-user: Warning: /etc/puppet/hiera.yaml: Use of 'hiera.yaml' version 3 is deprecated. It should be converted to version 5
<13>May 25 22:41:08 puppet-user:    (file: /etc/puppet/hiera.yaml)
<13>May 25 22:41:08 puppet-user: Warning: Undefined variable '::deploy_config_name'; 
<13>May 25 22:41:08 puppet-user:    (file & line not available)
<13>May 25 22:41:08 puppet-user: Warning: The function 'hiera' is deprecated in favor of using 'lookup'. See https://puppet.com/docs/puppet/7.10/deprecated_language.html
<13>May 25 22:41:08 puppet-user:    (file & line not available)
<13>May 25 22:41:08 puppet-user: Error: Function lookup() did not find a value for the name 'oslo_messaging_rpc_password'
+ rc=1
+ '[' false = false ']'
+ set +x
2022-05-25 22:41:11.383562 |                                      |    WARNING | ERROR: Can't run container container-puppet-neutron
stderr: + logger -s -t puppet-user
+ /usr/bin/puppet apply --summarize --detailed-exitcodes --color=false --modulepath=/etc/puppet/modules:/usr/share/openstack-puppet/modules --tags '"file,file_line,concat,augeas,cron,neutron_config,ovn_metadata_agent_config"' /etc/config.pp
<13>May 25 22:41:08 puppet-user: Error: Facter: error while resolving custom fact "haproxy_version": undefined method `strip' for nil:NilClass
<13>May 25 22:41:11 puppet-user: Warning: /etc/puppet/hiera.yaml: Use of 'hiera.yaml' version 3 is deprecated. It should be converted to version 5
<13>May 25 22:41:11 puppet-user:    (file: /etc/puppet/hiera.yaml)
<13>May 25 22:41:11 puppet-user: Warning: Undefined variable '::deploy_config_name'; 
<13>May 25 22:41:11 puppet-user:    (file & line not available)
<13>May 25 22:41:11 puppet-user: Warning: The function 'hiera' is deprecated in favor of using 'lookup'. See https://puppet.com/docs/puppet/7.10/deprecated_language.html
<13>May 25 22:41:11 puppet-user:    (file & line not available)
<13>May 25 22:41:11 puppet-user: Error: Function lookup() did not find a value for the name 'oslo_messaging_rpc_password'
+ rc=1
+ '[' false = false ']'
+ set +x

It used to export the mentioned Data before the following patch was merged:
https://github.com/openstack/python-tripleoclient/commit/d7af2f54826b3086af4691753b00173dc7a95a70

Version-Release number of selected component (if applicable):
python3-tripleoclient-16.4.1-0.20220513140934.559cc8c.el9ost.noarch

How reproducible:
Always

Steps to Reproduce:
1. Deploy DCN topology with a central site (stack) and DCN site (stack).
2. First Central stack is deployed.
3. Export parameters of central stack with "openstack overcloud export" command.
4. Attach output template to DCN stach overcloud deploy command line

Actual results:
The DCN stack deployment fails on:
puppet-user: Error: Function lookup() did not find a value for the name 'oslo_messaging_rpc_password'

Expected results:


Additional info:
The output of export command even warns about missing Data - GlobalConfigExtraMapData