Remote execution error "undefined method `prune_known_hosts!'"

Foreman and Proxy versions:

Foreman 2.5.1, Katello 4.1.0 on CentOS 7.9.2009

Problem:

I tried to execution a shell command via remote execution on a couple of servers. However the job failed for each server with the error messages:

1: Error initializing command: NoMethodError - undefined method `prune_known_hosts!' for ForemanRemoteExecutionCore::Utils:Module
2: Did you mean?  prune_known_hosts
3: Exit status: EXCEPTION

Proxy log contains this each time:

2021-07-16T07:11:07  [E] error while initalizing command NoMethodError undefined method `prune_known_hosts!' for ForemanRemoteExecutionCore::Utils:Module
Did you mean?  prune_known_hosts:
 /opt/theforeman/tfm/root/usr/share/gems/gems/foreman_remote_execution_core-1.4.4/lib/foreman_remote_execution_core/script_runner.rb:153:in `start'
/opt/theforeman/tfm/root/usr/share/gems/gems/foreman-tasks-core-0.3.5/lib/foreman_tasks_core/runner/dispatcher.rb:32:in `start_runner'
/opt/theforeman/tfm/root/usr/share/gems/gems/dynflow-1.4.8/lib/dynflow/actor.rb:13:in `on_message'
/opt/theforeman/tfm/root/usr/share/gems/gems/concurrent-ruby-edge-0.6.0/lib/concurrent-ruby-edge/concurrent/actor/context.rb:46:in `on_envelope'
/opt/theforeman/tfm/root/usr/share/gems/gems/foreman-tasks-core-0.3.5/lib/foreman_tasks_core/runner/dispatcher.rb:24:in `on_envelope'
/opt/theforeman/tfm/root/usr/share/gems/gems/concurrent-ruby-edge-0.6.0/lib/concurrent-ruby-edge/concurrent/actor/behaviour/executes_context.rb:7:in `on_envelope'
/opt/theforeman/tfm/root/usr/share/gems/gems/concurrent-ruby-edge-0.6.0/lib/concurrent-ruby-edge/concurrent/actor/behaviour/abstract.rb:25:in `pass'
/opt/theforeman/tfm/root/usr/share/gems/gems/dynflow-1.4.8/lib/dynflow/actor.rb:122:in `on_envelope'
/opt/theforeman/tfm/root/usr/share/gems/gems/concurrent-ruby-edge-0.6.0/lib/concurrent-ruby-edge/concurrent/actor/behaviour/abstract.rb:25:in `pass'
/opt/theforeman/tfm/root/usr/share/gems/gems/concurrent-ruby-edge-0.6.0/lib/concurrent-ruby-edge/concurrent/actor/behaviour/awaits.rb:15:in `on_envelope'
/opt/theforeman/tfm/root/usr/share/gems/gems/concurrent-ruby-edge-0.6.0/lib/concurrent-ruby-edge/concurrent/actor/behaviour/abstract.rb:25:in `pass'
/opt/theforeman/tfm/root/usr/share/gems/gems/concurrent-ruby-edge-0.6.0/lib/concurrent-ruby-edge/concurrent/actor/behaviour/sets_results.rb:14:in `on_envelope'
/opt/theforeman/tfm/root/usr/share/gems/gems/dynflow-1.4.8/lib/dynflow/actor.rb:56:in `on_envelope'
/opt/theforeman/tfm/root/usr/share/gems/gems/concurrent-ruby-edge-0.6.0/lib/concurrent-ruby-edge/concurrent/actor/behaviour/abstract.rb:25:in `pass'
/opt/theforeman/tfm/root/usr/share/gems/gems/concurrent-ruby-edge-0.6.0/lib/concurrent-ruby-edge/concurrent/actor/behaviour/buffer.rb:38:in `process_envelope'
/opt/theforeman/tfm/root/usr/share/gems/gems/concurrent-ruby-edge-0.6.0/lib/concurrent-ruby-edge/concurrent/actor/behaviour/buffer.rb:31:in `process_envelopes?'
/opt/theforeman/tfm/root/usr/share/gems/gems/concurrent-ruby-edge-0.6.0/lib/concurrent-ruby-edge/concurrent/actor/behaviour/buffer.rb:20:in `on_envelope'
/opt/theforeman/tfm/root/usr/share/gems/gems/concurrent-ruby-edge-0.6.0/lib/concurrent-ruby-edge/concurrent/actor/behaviour/abstract.rb:25:in `pass'
/opt/theforeman/tfm/root/usr/share/gems/gems/concurrent-ruby-edge-0.6.0/lib/concurrent-ruby-edge/concurrent/actor/behaviour/termination.rb:55:in `on_envelope'
/opt/theforeman/tfm/root/usr/share/gems/gems/concurrent-ruby-edge-0.6.0/lib/concurrent-ruby-edge/concurrent/actor/behaviour/abstract.rb:25:in `pass'
/opt/theforeman/tfm/root/usr/share/gems/gems/concurrent-ruby-edge-0.6.0/lib/concurrent-ruby-edge/concurrent/actor/behaviour/removes_child.rb:10:in `on_envelope'
/opt/theforeman/tfm/root/usr/share/gems/gems/concurrent-ruby-edge-0.6.0/lib/concurrent-ruby-edge/concurrent/actor/behaviour/abstract.rb:25:in `pass'
/opt/theforeman/tfm/root/usr/share/gems/gems/concurrent-ruby-edge-0.6.0/lib/concurrent-ruby-edge/concurrent/actor/behaviour/sets_results.rb:14:in `on_envelope'
/opt/theforeman/tfm/root/usr/share/gems/gems/concurrent-ruby-edge-0.6.0/lib/concurrent-ruby-edge/concurrent/actor/core.rb:162:in `process_envelope'
/opt/theforeman/tfm/root/usr/share/gems/gems/concurrent-ruby-edge-0.6.0/lib/concurrent-ruby-edge/concurrent/actor/core.rb:96:in `block in on_envelope'
/opt/theforeman/tfm/root/usr/share/gems/gems/concurrent-ruby-edge-0.6.0/lib/concurrent-ruby-edge/concurrent/actor/core.rb:119:in `block (2 levels) in schedule_execution'
/opt/theforeman/tfm/root/usr/share/gems/gems/concurrent-ruby-1.1.6/lib/concurrent-ruby/concurrent/synchronization/mutex_lockable_object.rb:41:in `block in synchronize'
/opt/theforeman/tfm/root/usr/share/gems/gems/concurrent-ruby-1.1.6/lib/concurrent-ruby/concurrent/synchronization/mutex_lockable_object.rb:41:in `synchronize'
/opt/theforeman/tfm/root/usr/share/gems/gems/concurrent-ruby-1.1.6/lib/concurrent-ruby/concurrent/synchronization/mutex_lockable_object.rb:41:in `synchronize'
/opt/theforeman/tfm/root/usr/share/gems/gems/concurrent-ruby-edge-0.6.0/lib/concurrent-ruby-edge/concurrent/actor/core.rb:116:in `block in schedule_execution'
/opt/theforeman/tfm/root/usr/share/gems/gems/concurrent-ruby-1.1.6/lib/concurrent-ruby/concurrent/executor/serialized_execution.rb:18:in `call'
/opt/theforeman/tfm/root/usr/share/gems/gems/concurrent-ruby-1.1.6/lib/concurrent-ruby/concurrent/executor/serialized_execution.rb:96:in `work'
/opt/theforeman/tfm/root/usr/share/gems/gems/concurrent-ruby-1.1.6/lib/concurrent-ruby/concurrent/executor/serialized_execution.rb:77:in `block in call_job'
/opt/theforeman/tfm/root/usr/share/gems/gems/concurrent-ruby-1.1.6/lib/concurrent-ruby/concurrent/executor/ruby_thread_pool_executor.rb:353:in `run_task'
/opt/theforeman/tfm/root/usr/share/gems/gems/concurrent-ruby-1.1.6/lib/concurrent-ruby/concurrent/executor/ruby_thread_pool_executor.rb:342:in `block (3 levels) in create_worker'
/opt/theforeman/tfm/root/usr/share/gems/gems/concurrent-ruby-1.1.6/lib/concurrent-ruby/concurrent/executor/ruby_thread_pool_executor.rb:325:in `loop'
/opt/theforeman/tfm/root/usr/share/gems/gems/concurrent-ruby-1.1.6/lib/concurrent-ruby/concurrent/executor/ruby_thread_pool_executor.rb:325:in `block (2 levels) in create_worker'
/opt/theforeman/tfm/root/usr/share/gems/gems/concurrent-ruby-1.1.6/lib/concurrent-ruby/concurrent/executor/ruby_thread_pool_executor.rb:324:in `catch'
/opt/theforeman/tfm/root/usr/share/gems/gems/concurrent-ruby-1.1.6/lib/concurrent-ruby/concurrent/executor/ruby_thread_pool_executor.rb:324:in `block in create_worker'
/opt/theforeman/tfm/root/usr/share/gems/gems/logging-2.3.0/lib/logging/diagnostic_context.rb:474:in `block in create_with_logging_context'

If I click on “Rerun” on the job page it restarts everything and this time it works.

I had the same thing yesterday: first execution didn’t work. Second did.

# rpm -qa *remote_execution*
tfm-rubygem-foreman_remote_execution-4.5.1-1.fm2_5.el7.noarch
tfm-rubygem-hammer_cli_foreman_remote_execution-0.2.1-2.fm2_5.el7.noarch
tfm-rubygem-smart_proxy_remote_execution_ssh-0.3.2-1.fm2_5.el7.noarch
tfm-rubygem-foreman_remote_execution_core-1.4.4-1.el7.noarch

Sigh, yes, here’s a fix[1]. Until it gets in first execution will fail against any host. Following executions will be fine until the host is reprovisioned. Sorry about it

[1] - Refs #32606 - Make method names match by adamruzicka · Pull Request #620 · theforeman/foreman_remote_execution · GitHub

2 Likes

Interesting, the issue never popped up by using remote_execution invoked in all hosts / schedule remote execution but always happend by using content hosts / tracer / restart. Looks like this fix solved my issue in Bug #32929: Unable to restart or reboot service/system after update in content hosts / traces - Katello - Foreman