This is intermittent but seen enough times to need a bug. The trace during overcloud deploy is like:
2019-07-22 02:46:58 | "puppet-user: error: Could not connect to cluster (is it running?)",
...
2019-07-22 02:58:18 | "stderr: Error: unable to find resource 'galera-bundle'",
...
2019-07-22 02:58:18 | "Error running ['docker', 'run', '--name', 'rabbitmq_init_bundle', '--label', 'config_id=tripleo_step2', '--label', 'container_name=rabbitmq_init_bundle', '--label', 'managed_by=paunch', '--label', 'config_data={\"ipc\": \"host\", \"start_order\": 1, \"image\": \"192.168.24.1:8787/tripleomaster/centos-binary-rabbitmq:4cadc580aed3cde73c487f827f76bf7b92b4d1e5_10e135ca-updated-20190722011122\", \"environment\": [\"LANG=en_US.UTF-8\", \"LC_ALL=en_US.UTF-8\", \"TRIPLEO_DEPLOY_IDENTIFIER=1563761118\"], \"command\": [\"/container_puppet_apply.sh\", \"2\", \"file,file_line,concat,augeas,pacemaker::resource::bundle,pacemaker::property,pacemaker::resource::ocf,pacemaker::constraint::order,pacemaker::constraint::colocation,rabbitmq_policy,rabbitmq_user,rabbitmq_ready\", \"include ::tripleo::profile::base::pacemaker;include ::tripleo::profile::pacemaker::rabbitmq_bundle\", \"\"], \"user\": \"root\", \"volumes\": [\"/etc/hosts:/etc/hosts:ro\", \"/etc/localtime:/etc/localtime:ro\", \"/etc/pki/ca-trust/extracted:/etc/pki/ca-trust/extracted:ro\", \"/etc/pki/ca-trust/source/anchors:/etc/pki/ca-trust/source/anchors:ro\", \"/etc/pki/tls/certs/ca-bundle.crt:/etc/pki/tls/certs/ca-bundle.crt:ro\", \"/etc/pki/tls/certs/ca-bundle.trust.crt:/etc/pki/tls/certs/ca-bundle.trust.crt:ro\", \"/etc/pki/tls/cert.pem:/etc/pki/tls/cert.pem:ro\", \"/dev/log:/dev/log\", \"/var/lib/container-config-scripts/container_puppet_apply.sh:/container_puppet_apply.sh:ro\", \"/etc/puppet:/tmp/puppet-etc:ro\", \"/usr/share/openstack-puppet/modules:/usr/share/openstack-puppet/modules:ro\", \"/etc/corosync/corosync.conf:/etc/corosync/corosync.conf:ro\", \"/bin/true:/bin/epmd\"], \"net\": \"host\", \"detach\": false}', '--env=LANG=en_US.UTF-8', '--env=LC_ALL=en_US.UTF-8', '--env=TRIPLEO_DEPLOY_IDENTIFIER=1563761118', '--net=host', '--ipc=host', '--user=root', '--volume=/etc/hosts:/etc/hosts:ro', '--volume=/etc/localtime:/etc/localtime:ro', '--volume=/etc/pki/ca-trust/extracted:/etc/pki/ca-trust/extracted:ro', '--volume=/etc/pki/ca-trust/source/anchors:/etc/pki/ca-trust/source/anchors:ro', '--volume=/etc/pki/tls/certs/ca-bundle.crt:/etc/pki/tls/certs/ca-bundle.crt:ro', '--volume=/etc/pki/tls/certs/ca-bundle.trust.crt:/etc/pki/tls/certs/ca-bundle.trust.crt:ro', '--volume=/etc/pki/tls/cert.pem:/etc/pki/tls/cert.pem:ro', '--volume=/dev/log:/dev/log', '--volume=/var/lib/container-config-scripts/container_puppet_apply.sh:/container_puppet_apply.sh:ro', '--volume=/etc/puppet:/tmp/puppet-etc:ro', '--volume=/usr/share/openstack-puppet/modules:/usr/share/openstack-puppet/modules:ro', '--volume=/etc/corosync/corosync.conf:/etc/corosync/corosync.conf:ro', '--volume=/bin/true:/bin/epmd', '192.168.24.1:8787/tripleomaster/centos-binary-rabbitmq:4cadc580aed3cde73c487f827f76bf7b92b4d1e5_10e135ca-updated-20190722011122', '/container_puppet_apply.sh', '2', 'file,file_line,concat,augeas,pacemaker::resource::bundle,pacemaker::property,pacemaker::resource::ocf,pacemaker::constraint::order,pacemaker::constraint::colocation,rabbitmq_policy,rabbitmq_user,rabbitmq_ready', 'include ::tripleo::profile::base::pacemaker;include ::tripleo::profile::pacemaker::rabbitmq_bundle', '']. [6]",
...
2019-07-22 02:58:18 | "Error: Facter: error while resolving custom fact \"rabbitmq_nodename\": undefined method `[]' for nil:NilClass",
Examples at [1][2] and you can see more relevant logs at [3]
[1] http://logs.rdoproject.org/openstack-periodic-master/opendev.org/openstack/tripleo-ci/master/periodic-tripleo-ci-centos-7-ovb-3ctlr_1comp-featureset035-master/fc50eab/logs/undercloud/home/zuul/overcloud_deploy.log.txt.gz
[2] https://logs.rdoproject.org/openstack-periodic-master/opendev.org/openstack/tripleo-ci/master/periodic-tripleo-ci-centos-7-ovb-3ctlr_1comp_1supp-featureset039-master/e69ad4b/logs/undercloud/home/zuul/overcloud_deploy.log.txt.gz
[3] https://logs.rdoproject.org/openstack-periodic-master/opendev.org/openstack/tripleo-ci/master/periodic-tripleo-ci-centos-7-ovb-3ctlr_1comp_1supp-featureset039-master/e69ad4b/logs/overcloud-controller-2/var/log/extra/docker/containers/rabbitmq_init_bundle/stdout.log.txt.gz
