I have managed to work around the hanging host by reducing the memory of the hosted engine during the deploy. But unfortunately the deploy still fails. There is no real error message in the deployment log: 2020-11-09 08:58:55,337+0100 INFO otopi.ovirt_hosted_engine_setup.ansible_utils ansible_utils._process_output:111 TASK [ovirt.hosted_engine_setup : Wait for the host to be up] 2020-11-09 09:02:24,776+0100 INFO otopi.ovirt_hosted_engine_setup.ansible_utils ansible_utils._process_output:111 ok: [localhost] 2020-11-09 09:02:26,380+0100 DEBUG otopi.ovirt_hosted_engine_setup.ansible_utils ansible_utils._process_output:105 TASK [ovirt.hosted_engine_setup : debug] 2020-11-09 09:02:27,883+0100 DEBUG otopi.ovirt_hosted_engine_setup.ansible_utils ansible_utils._process_output:105 host_result_up_check: {'changed': False, 'ovirt_hosts': [{'href': '/ovirt-engine/api/hosts/9e504890-bcb8-40b1-813f-ee123547b3f9', 'comment': '', 'id': '9e504890-bcb8-40b1-813f-ee123547b3f9', 'name': 'station5.example.com', 'address': 'station5.example.com', 'affinity_labels': [], 'auto_numa_status': 'unknown', 'certificate': {'organization': 'example.com', 'subject': 'O=example.com,CN=station5.example.com'}, 'cluster': {'href': '/ovirt-engine/api/clusters/1e67ce6a-2011-11eb-8029-00163e28a2ed', 'id': '1e67ce6a-2011-11eb-8029-00163e28a2ed'}, 'cpu': {'name': 'Intel(R) Core(TM) i5-3470 CPU @ 3.20GHz', 'speed': 3554.0, 'topology': {'cores': 4, 'sockets': 1, 'threads': 1}, 'type': 'Intel SandyBridge IBRS SSBD MDS Family'}, 'device_passthrough': {'enabled': False}, 'devices': [], 'external_network_provider_configurations': [], 'external_status': 'ok', 'hardware_information': {' family': '103C_53307F G=D', 'manufacturer': 'Hewlett-Packard', 'product_name': 'HP Compaq Pro 6300 SFF', 'serial_number': 'CZC41045SC', 'supported_rng_sources': ['random', 'hwrng'], 'uuid': 'F748FD00-9E43-11E3-9BDA-A0481C87CA32', 'version': ''}, 'hooks': [], 'iscsi': {'initiator': 'iqn.1994-05.com.redhat:a668abd829a1'}, 'katello_errata': [], 'kdump_status': 'disabled', 'ksm': {'enabled': False}, 'libvirt_version': {'build': 0, 'full_version': 'libvirt-6.0.0-25.2.el8', 'major': 6, 'minor': 0, 'revision': 0}, 'max_scheduling_memory': 16176381952, 'memory': 16512974848, 'network_attachments': [], 'nics': [], 'numa_nodes': [], 'numa_supported': False, 'os': {'custom_kernel_cmdline': '', 'reported_kernel_cmdline': 'BOOT_IMAGE=(hd0,msdos1)//ovirt-node-ng-4.4.2-0.20200918.0+1/vmlinuz-4.18.0-193.19.1.el8_2.x86_64 crashkernel=auto resume=/dev/mapper/onn-swap rd.lvm.lv=onn/ovirt-node-ng-4.4.2-0.20200918.0+1 rd.lvm.lv=onn/swap rhgb quiet root=/dev/onn/ovirt-node-ng-4.4.2-0.20200918.0+1 boot=UU ID=78682d93-a122-4ea9-8593-224fa32b7ab4 rootflags=discard img.bootid=ovirt-node-ng-4.4.2-0.20200918.0+1', 'type': 'RHEL', 'version': {'full_version': '8 - 2.2004.0.1.el8', 'major': 8}}, 'permissions': [], 'port': 54321, 'power_management': {'automatic_pm_enabled': True, 'enabled': False, 'kdump_detection': True, 'pm_proxies': []}, 'protocol': 'stomp', 'se_linux': {'mode': 'enforcing'}, 'spm': {'priority': 5, 'status': 'none'}, 'ssh': {'fingerprint': 'SHA256:pUi4oFo/5DGLYbWN39rEiap3bUfVK1C/6OPEecf8GFg', 'port': 22}, 'statistics': [], 'status': 'non_operational', 'status_detail': 'storage_domain_unreachable', 'storage_connection_extensions': [], 'summary': {'active': 1, 'migrating': 0, 'total': 1}, 'tags': [], 'transparent_huge_pages': {'enabled': True}, 'type': 'rhel', 'unmanaged_networks': [], 'update_available': False, 'version': {'build': 26, 'full_version': 'vdsm-4.40.26.3-1.el8', 'major': 4, 'minor': 40, 'revision': 3}, 'vgpu_placement': 'consolidated'}], 'failed': False, 'attem pts': 21} 2020-11-09 09:02:29,386+0100 INFO otopi.ovirt_hosted_engine_setup.ansible_utils ansible_utils._process_output:111 TASK [ovirt.hosted_engine_setup : Notify the user about a failure] 2020-11-09 09:02:30,891+0100 INFO otopi.ovirt_hosted_engine_setup.ansible_utils ansible_utils._process_output:111 skipping: [localhost] 2020-11-09 09:02:32,395+0100 INFO otopi.ovirt_hosted_engine_setup.ansible_utils ansible_utils._process_output:111 TASK [ovirt.hosted_engine_setup : set_fact] 2020-11-09 09:02:33,800+0100 INFO otopi.ovirt_hosted_engine_setup.ansible_utils ansible_utils._process_output:111 ok: [localhost] 2020-11-09 09:02:35,404+0100 INFO otopi.ovirt_hosted_engine_setup.ansible_utils ansible_utils._process_output:111 TASK [ovirt.hosted_engine_setup : Collect error events from the Engine] 2020-11-09 09:02:37,410+0100 INFO otopi.ovirt_hosted_engine_setup.ansible_utils ansible_utils._process_output:111 ok: [localhost] 2020-11-09 09:02:39,114+0100 INFO otopi.ovirt_hosted_engine_setup.ansible_utils ansible_utils._process_output:111 TASK [ovirt.hosted_engine_setup : Generate the error message from the engine events] 2020-11-09 09:02:40,819+0100 DEBUG otopi.ovirt_hosted_engine_setup.ansible_utils ansible_utils._process_output:105 {'msg': "The task includes an option with an undefined variable. The error was: 'dict object' has no attribute 'host'\n\nThe error appears to be in '/usr/share/ansible/roles/ovirt.hosted_engine_setup/tasks/bootstrap_local_vm/05_add_host.yml': line 165, column 9, but may\nbe elsewhere in the file depending on the exact syntax problem.\n\nThe offending line appears to be:\n\n\n - name: Generate the error message from the engine events\n ^ here\n", '_ansible_no_log': False} I could attach the full log, if required.