vCenter compute resource associate VMs error in Foreman 1.15.6.6-1

Problem:
Linking VM objects supplied by the VMware compute resource plugin to Foreman hosts fails with the following error:

Oops, we're sorry but something went wrong

undefined method `port' for #<RbVmomi::VIM::VirtualEthernetCardLegacyNetworkBackingInfo:0x00007f61dd1f2750>

Expected outcome:
VM objects are linked to Foreman hosts in order to control power operations.

Foreman and Proxy versions:
foreman-proxy-1.15.6.6-1.el7sat
foreman-1.15.6.6-1.el7sat

Foreman and Proxy plugin versions:
bastion 5.1.1.4
foreman-tasks 0.9.6.4
foreman_bootdisk 10.0.2.2
foreman_discovery 9.1.5.3
foreman_docker 3.1.0.3
foreman_hooks 0.3.14
foreman_openscap 0.7.13
foreman_remote_execution 1.3.7.2
foreman_theme_satellite 1.0.4.19
foreman-vmware-1.15.6.45-1
foreman_virt_who_configure 0.1.9
katello 3.4.5.75
redhat_access 2.0.13

Steps to reproduce:

  1. Click Infrastructure > Compute resources > vCenter connection
  2. Click Associate VMs
  3. Error message is displayed

Other relevant data:
Full stack trace:

NoMethodError
undefined method `port' for #<RbVmomi::VIM::VirtualEthernetCardLegacyNetworkBackingInfo:0x00007f61dd1f2750>
/opt/theforeman/tfm/root/usr/share/gems/gems/fog-vsphere-1.7.0/lib/fog/vsphere/requests/compute/list_vm_interfaces.rb:68:in `raw_to_hash'
/opt/theforeman/tfm/root/usr/share/gems/gems/fog-vsphere-1.7.0/lib/fog/vsphere/requests/compute/list_vm_interfaces.rb:32:in `block in list_vm_interfaces'
/opt/theforeman/tfm/root/usr/share/gems/gems/fog-vsphere-1.7.0/lib/fog/vsphere/requests/compute/list_vm_interfaces.rb:32:in `map'
/opt/theforeman/tfm/root/usr/share/gems/gems/fog-vsphere-1.7.0/lib/fog/vsphere/requests/compute/list_vm_interfaces.rb:32:in `list_vm_interfaces'
/opt/theforeman/tfm/root/usr/share/gems/gems/fog-vsphere-1.7.0/lib/fog/vsphere/models/compute/interfaces.rb:16:in `all'
/opt/theforeman/tfm/root/usr/share/gems/gems/fog-core-1.45.0/lib/fog/core/collection.rb:112:in `lazy_load'
/opt/theforeman/tfm/root/usr/share/gems/gems/fog-core-1.45.0/lib/fog/core/collection.rb:16:in `map'
/usr/share/foreman/app/models/compute_resources/foreman/model/vmware.rb:510:in `associated_host'
/usr/share/foreman/app/controllers/compute_resources_controller.rb:49:in `block in associate'
/opt/theforeman/tfm/root/usr/share/gems/gems/fog-core-1.45.0/lib/fog/core/collection.rb:18:in `each'
/opt/theforeman/tfm/root/usr/share/gems/gems/fog-core-1.45.0/lib/fog/core/collection.rb:18:in `each'
/usr/share/foreman/app/controllers/compute_resources_controller.rb:47:in `associate'
/opt/rh/rh-ror42/root/usr/share/gems/gems/actionpack-4.2.6/lib/action_controller/metal/implicit_render.rb:4:in `send_action'
/opt/rh/rh-ror42/root/usr/share/gems/gems/actionpack-4.2.6/lib/abstract_controller/base.rb:198:in `process_action'
/opt/rh/rh-ror42/root/usr/share/gems/gems/actionpack-4.2.6/lib/action_controller/metal/rendering.rb:10:in `process_action'
/opt/rh/rh-ror42/root/usr/share/gems/gems/actionpack-4.2.6/lib/abstract_controller/callbacks.rb:20:in `block in process_action'
/opt/rh/rh-ror42/root/usr/share/gems/gems/activesupport-4.2.6/lib/active_support/callbacks.rb:117:in `call'
/opt/rh/rh-ror42/root/usr/share/gems/gems/activesupport-4.2.6/lib/active_support/callbacks.rb:555:in `block (2 levels) in compile'
/opt/rh/rh-ror42/root/usr/share/gems/gems/activesupport-4.2.6/lib/active_support/callbacks.rb:505:in `call'
/opt/rh/rh-ror42/root/usr/share/gems/gems/activesupport-4.2.6/lib/active_support/callbacks.rb:498:in `block (2 levels) in around'
/opt/rh/rh-ror42/root/usr/share/gems/gems/activesupport-4.2.6/lib/active_support/callbacks.rb:313:in `block (2 levels) in halting'
/usr/share/foreman/app/controllers/concerns/application_shared.rb:15:in `set_timezone'
/opt/rh/rh-ror42/root/usr/share/gems/gems/activesupport-4.2.6/lib/active_support/callbacks.rb:432:in `block in make_lambda'
/opt/rh/rh-ror42/root/usr/share/gems/gems/activesupport-4.2.6/lib/active_support/callbacks.rb:312:in `block in halting'
/opt/rh/rh-ror42/root/usr/share/gems/gems/activesupport-4.2.6/lib/active_support/callbacks.rb:497:in `block in around'
/opt/rh/rh-ror42/root/usr/share/gems/gems/activesupport-4.2.6/lib/active_support/callbacks.rb:505:in `call'
/opt/rh/rh-ror42/root/usr/share/gems/gems/activesupport-4.2.6/lib/active_support/callbacks.rb:498:in `block (2 levels) in around'
/opt/rh/rh-ror42/root/usr/share/gems/gems/activesupport-4.2.6/lib/active_support/callbacks.rb:313:in `block (2 levels) in halting'
/usr/share/foreman/app/models/concerns/foreman/thread_session.rb:32:in `clear_thread'
/opt/rh/rh-ror42/root/usr/share/gems/gems/activesupport-4.2.6/lib/active_support/callbacks.rb:432:in `block in make_lambda'
/opt/rh/rh-ror42/root/usr/share/gems/gems/activesupport-4.2.6/lib/active_support/callbacks.rb:312:in `block in halting'
/opt/rh/rh-ror42/root/usr/share/gems/gems/activesupport-4.2.6/lib/active_support/callbacks.rb:497:in `block in around'
/opt/rh/rh-ror42/root/usr/share/gems/gems/activesupport-4.2.6/lib/active_support/callbacks.rb:505:in `call'
/opt/rh/rh-ror42/root/usr/share/gems/gems/activesupport-4.2.6/lib/active_support/callbacks.rb:498:in `block (2 levels) in around'
/opt/rh/rh-ror42/root/usr/share/gems/gems/activesupport-4.2.6/lib/active_support/callbacks.rb:313:in `block (2 levels) in halting'
/usr/share/foreman/app/controllers/concerns/foreman/controller/topbar_sweeper.rb:12:in `set_topbar_sweeper_controller'
/opt/rh/rh-ror42/root/usr/share/gems/gems/activesupport-4.2.6/lib/active_support/callbacks.rb:432:in `block in make_lambda'
/opt/rh/rh-ror42/root/usr/share/gems/gems/activesupport-4.2.6/lib/active_support/callbacks.rb:312:in `block in halting'
/opt/rh/rh-ror42/root/usr/share/gems/gems/activesupport-4.2.6/lib/active_support/callbacks.rb:497:in `block in around'
/opt/rh/rh-ror42/root/usr/share/gems/gems/activesupport-4.2.6/lib/active_support/callbacks.rb:505:in `call'
/opt/rh/rh-ror42/root/usr/share/gems/gems/activesupport-4.2.6/lib/active_support/callbacks.rb:498:in `block (2 levels) in around'
/opt/rh/rh-ror42/root/usr/share/gems/gems/activesupport-4.2.6/lib/active_support/callbacks.rb:313:in `block (2 levels) in halting'
/opt/theforeman/tfm/root/usr/share/gems/gems/audited-4.4.1/lib/audited/sweeper.rb:14:in `around'
/opt/rh/rh-ror42/root/usr/share/gems/gems/activesupport-4.2.6/lib/active_support/callbacks.rb:455:in `public_send'
/opt/rh/rh-ror42/root/usr/share/gems/gems/activesupport-4.2.6/lib/active_support/callbacks.rb:455:in `block in make_lambda'
/opt/rh/rh-ror42/root/usr/share/gems/gems/activesupport-4.2.6/lib/active_support/callbacks.rb:312:in `block in halting'
/opt/rh/rh-ror42/root/usr/share/gems/gems/activesupport-4.2.6/lib/active_support/callbacks.rb:497:in `block in around'
/opt/rh/rh-ror42/root/usr/share/gems/gems/activesupport-4.2.6/lib/active_support/callbacks.rb:505:in `call'
/opt/rh/rh-ror42/root/usr/share/gems/gems/activesupport-4.2.6/lib/active_support/callbacks.rb:92:in `__run_callbacks__'
/opt/rh/rh-ror42/root/usr/share/gems/gems/activesupport-4.2.6/lib/active_support/callbacks.rb:778:in `_run_process_action_callbacks'
/opt/rh/rh-ror42/root/usr/share/gems/gems/activesupport-4.2.6/lib/active_support/callbacks.rb:81:in `run_callbacks'
/opt/rh/rh-ror42/root/usr/share/gems/gems/actionpack-4.2.6/lib/abstract_controller/callbacks.rb:19:in `process_action'
/opt/rh/rh-ror42/root/usr/share/gems/gems/actionpack-4.2.6/lib/action_controller/metal/rescue.rb:29:in `process_action'
/opt/rh/rh-ror42/root/usr/share/gems/gems/actionpack-4.2.6/lib/action_controller/metal/instrumentation.rb:32:in `block in process_action'
/opt/rh/rh-ror42/root/usr/share/gems/gems/activesupport-4.2.6/lib/active_support/notifications.rb:164:in `block in instrument'
/opt/rh/rh-ror42/root/usr/share/gems/gems/activesupport-4.2.6/lib/active_support/notifications/instrumenter.rb:20:in `instrument'
/opt/rh/rh-ror42/root/usr/share/gems/gems/activesupport-4.2.6/lib/active_support/notifications.rb:164:in `instrument'
/opt/rh/rh-ror42/root/usr/share/gems/gems/actionpack-4.2.6/lib/action_controller/metal/instrumentation.rb:30:in `process_action'
/opt/rh/rh-ror42/root/usr/share/gems/gems/actionpack-4.2.6/lib/action_controller/metal/params_wrapper.rb:250:in `process_action'
/opt/rh/rh-ror42/root/usr/share/gems/gems/activerecord-4.2.6/lib/active_record/railties/controller_runtime.rb:18:in `process_action'
/opt/rh/rh-ror42/root/usr/share/gems/gems/actionpack-4.2.6/lib/abstract_controller/base.rb:137:in `process'
/opt/rh/rh-ror42/root/usr/share/gems/gems/actionview-4.2.6/lib/action_view/rendering.rb:30:in `process'
/opt/rh/rh-ror42/root/usr/share/gems/gems/actionpack-4.2.6/lib/action_controller/metal.rb:196:in `dispatch'
/opt/rh/rh-ror42/root/usr/share/gems/gems/actionpack-4.2.6/lib/action_controller/metal/rack_delegation.rb:13:in `dispatch'
/opt/rh/rh-ror42/root/usr/share/gems/gems/actionpack-4.2.6/lib/action_controller/metal.rb:237:in `block in action'
/opt/rh/rh-ror42/root/usr/share/gems/gems/actionpack-4.2.6/lib/action_dispatch/routing/route_set.rb:74:in `dispatch'
/opt/rh/rh-ror42/root/usr/share/gems/gems/actionpack-4.2.6/lib/action_dispatch/routing/route_set.rb:43:in `serve'
/opt/rh/rh-ror42/root/usr/share/gems/gems/actionpack-4.2.6/lib/action_dispatch/journey/router.rb:43:in `block in serve'
/opt/rh/rh-ror42/root/usr/share/gems/gems/actionpack-4.2.6/lib/action_dispatch/journey/router.rb:30:in `each'
/opt/rh/rh-ror42/root/usr/share/gems/gems/actionpack-4.2.6/lib/action_dispatch/journey/router.rb:30:in `serve'
/opt/rh/rh-ror42/root/usr/share/gems/gems/actionpack-4.2.6/lib/action_dispatch/routing/route_set.rb:817:in `call'
/opt/rh/rh-ror42/root/usr/share/gems/gems/actionpack-4.2.6/lib/action_dispatch/middleware/static.rb:120:in `call'
/opt/rh/rh-ror42/root/usr/share/gems/gems/actionpack-4.2.6/lib/action_dispatch/middleware/static.rb:120:in `call'
/opt/theforeman/tfm/root/usr/share/gems/gems/apipie-rails-0.5.6/lib/apipie/static_dispatcher.rb:65:in `call'
/opt/theforeman/tfm/root/usr/share/gems/gems/apipie-rails-0.5.6/lib/apipie/extractor/recorder.rb:136:in `call'
/opt/rh/rh-ror42/root/usr/share/gems/gems/actionpack-4.2.6/lib/action_dispatch/middleware/static.rb:120:in `call'
/opt/rh/rh-ror42/root/usr/share/gems/gems/actionpack-4.2.6/lib/action_dispatch/middleware/static.rb:120:in `call'
/opt/rh/rh-ror42/root/usr/share/gems/gems/actionpack-4.2.6/lib/action_dispatch/middleware/static.rb:120:in `call'
/opt/rh/rh-ror42/root/usr/share/gems/gems/actionpack-4.2.6/lib/action_dispatch/middleware/static.rb:120:in `call'
/opt/rh/rh-ror42/root/usr/share/gems/gems/actionpack-4.2.6/lib/action_dispatch/middleware/static.rb:120:in `call'
/opt/rh/rh-ror42/root/usr/share/gems/gems/actionpack-4.2.6/lib/action_dispatch/middleware/static.rb:120:in `call'
/opt/rh/rh-ror42/root/usr/share/gems/gems/actionpack-4.2.6/lib/action_dispatch/middleware/static.rb:120:in `call'
/opt/rh/rh-ror42/root/usr/share/gems/gems/actionpack-4.2.6/lib/action_dispatch/middleware/static.rb:120:in `call'
/opt/rh/rh-ror42/root/usr/share/gems/gems/actionpack-4.2.6/lib/action_dispatch/middleware/static.rb:120:in `call'
/opt/rh/rh-ror42/root/usr/share/gems/gems/actionpack-4.2.6/lib/action_dispatch/middleware/static.rb:120:in `call'
/opt/theforeman/tfm/root/usr/share/gems/gems/apipie-rails-0.5.6/lib/apipie/middleware/checksum_in_headers.rb:27:in `call'
/opt/rh/rh-ror42/root/usr/share/gems/gems/rack-1.6.2/lib/rack/etag.rb:24:in `call'
/opt/rh/rh-ror42/root/usr/share/gems/gems/rack-1.6.2/lib/rack/conditionalget.rb:38:in `call'
/opt/rh/rh-ror42/root/usr/share/gems/gems/rack-1.6.2/lib/rack/head.rb:13:in `call'
/opt/rh/rh-ror42/root/usr/share/gems/gems/actionpack-4.2.6/lib/action_dispatch/middleware/params_parser.rb:27:in `call'
/opt/theforeman/tfm/root/usr/share/gems/gems/katello-3.4.5.74/lib/katello/params_parser_wrapper.rb:12:in `call'
/usr/share/foreman/lib/middleware/catch_json_parse_errors.rb:8:in `call'
/opt/rh/rh-ror42/root/usr/share/gems/gems/actionpack-4.2.6/lib/action_dispatch/middleware/flash.rb:260:in `call'
/opt/rh/rh-ror42/root/usr/share/gems/gems/rack-1.6.2/lib/rack/session/abstract/id.rb:225:in `context'
/opt/rh/rh-ror42/root/usr/share/gems/gems/rack-1.6.2/lib/rack/session/abstract/id.rb:220:in `call'
/opt/rh/rh-ror42/root/usr/share/gems/gems/actionpack-4.2.6/lib/action_dispatch/middleware/cookies.rb:560:in `call'
/opt/rh/rh-ror42/root/usr/share/gems/gems/activerecord-4.2.6/lib/active_record/query_cache.rb:36:in `call'
/opt/rh/rh-ror42/root/usr/share/gems/gems/activerecord-4.2.6/lib/active_record/connection_adapters/abstract/connection_pool.rb:653:in `call'
/opt/rh/rh-ror42/root/usr/share/gems/gems/actionpack-4.2.6/lib/action_dispatch/middleware/callbacks.rb:29:in `block in call'
/opt/rh/rh-ror42/root/usr/share/gems/gems/activesupport-4.2.6/lib/active_support/callbacks.rb:88:in `__run_callbacks__'
/opt/rh/rh-ror42/root/usr/share/gems/gems/activesupport-4.2.6/lib/active_support/callbacks.rb:778:in `_run_call_callbacks'
/opt/rh/rh-ror42/root/usr/share/gems/gems/activesupport-4.2.6/lib/active_support/callbacks.rb:81:in `run_callbacks'
/opt/rh/rh-ror42/root/usr/share/gems/gems/actionpack-4.2.6/lib/action_dispatch/middleware/callbacks.rb:27:in `call'
/opt/rh/rh-ror42/root/usr/share/gems/gems/actionpack-4.2.6/lib/action_dispatch/middleware/remote_ip.rb:78:in `call'
/opt/rh/rh-ror42/root/usr/share/gems/gems/actionpack-4.2.6/lib/action_dispatch/middleware/debug_exceptions.rb:17:in `call'
/opt/rh/rh-ror42/root/usr/share/gems/gems/actionpack-4.2.6/lib/action_dispatch/middleware/show_exceptions.rb:30:in `call'
/opt/rh/rh-ror42/root/usr/share/gems/gems/railties-4.2.6/lib/rails/rack/logger.rb:38:in `call_app'
/opt/rh/rh-ror42/root/usr/share/gems/gems/railties-4.2.6/lib/rails/rack/logger.rb:22:in `call'
/usr/share/foreman/lib/middleware/tagged_logging.rb:18:in `call'
/opt/rh/rh-ror42/root/usr/share/gems/gems/actionpack-4.2.6/lib/action_dispatch/middleware/request_id.rb:21:in `call'
/opt/rh/rh-ror42/root/usr/share/gems/gems/rack-1.6.2/lib/rack/methodoverride.rb:22:in `call'
/opt/rh/rh-ror42/root/usr/share/gems/gems/rack-1.6.2/lib/rack/runtime.rb:18:in `call'
/opt/rh/rh-ror42/root/usr/share/gems/gems/activesupport-4.2.6/lib/active_support/cache/strategy/local_cache_middleware.rb:28:in `call'
/opt/rh/rh-ror42/root/usr/share/gems/gems/actionpack-4.2.6/lib/action_dispatch/middleware/static.rb:120:in `call'
/opt/rh/rh-ror42/root/usr/share/gems/gems/actionpack-4.2.6/lib/action_dispatch/middleware/static.rb:120:in `call'
/opt/rh/rh-ror42/root/usr/share/gems/gems/rack-1.6.2/lib/rack/sendfile.rb:113:in `call'
/opt/theforeman/tfm/root/usr/share/gems/gems/secure_headers-3.4.1/lib/secure_headers/middleware.rb:12:in `call'
/opt/rh/rh-ror42/root/usr/share/gems/gems/railties-4.2.6/lib/rails/engine.rb:518:in `call'
/opt/rh/rh-ror42/root/usr/share/gems/gems/railties-4.2.6/lib/rails/application.rb:165:in `call'
/opt/rh/rh-ror42/root/usr/share/gems/gems/railties-4.2.6/lib/rails/railtie.rb:194:in `public_send'
/opt/rh/rh-ror42/root/usr/share/gems/gems/railties-4.2.6/lib/rails/railtie.rb:194:in `method_missing'
/opt/rh/rh-ror42/root/usr/share/gems/gems/rack-1.6.2/lib/rack/urlmap.rb:66:in `block in call'
/opt/rh/rh-ror42/root/usr/share/gems/gems/rack-1.6.2/lib/rack/urlmap.rb:50:in `each'
/opt/rh/rh-ror42/root/usr/share/gems/gems/rack-1.6.2/lib/rack/urlmap.rb:50:in `call'
/usr/share/gems/gems/passenger-4.0.18/lib/phusion_passenger/rack/thread_handler_extension.rb:77:in `process_request'
/usr/share/gems/gems/passenger-4.0.18/lib/phusion_passenger/request_handler/thread_handler.rb:140:in `accept_and_process_next_request'
/usr/share/gems/gems/passenger-4.0.18/lib/phusion_passenger/request_handler/thread_handler.rb:108:in `main_loop'
/usr/share/gems/gems/passenger-4.0.18/lib/phusion_passenger/request_handler.rb:441:in `block (3 levels) in start_threads'
/opt/theforeman/tfm/root/usr/share/gems/gems/logging-1.8.2/lib/logging/diagnostic_context.rb:323:in `block in create_with_logging_context'

I also opened a ticket at Red Hat Support.

Best wishes,
Christian.

There is also an Foreman bug for this: Bug #20302: vCenter compute resource associate VMs error - Foreman

It looks like this issue has been fixed in later Foreman versions as I’m unable to reproduce the issue on my CentOS 7-based lab (Foreman 1.17.1, Katello 3.6.0).

Best wishes,
Christian.