[UBI] Fix Automation invocation bug

Reporters

• Georgios P. Katsikas

Description

Automation service crashes during initialization

TFS deployment settings

• context, device, service, pathcomp, telemetry, kpi*, analytics, policy, automation

Sequence of actions that resulted in the bug

• just deploy TFS and the service will crash

Document the explicit error

(venv)  ubuntu@tfs  ~/tfs-ctrl   develop ±  ./scripts/show_logs_automation.sh
INFO:__main__:Starting...
INFO:__main__:Getting SQLAlchemy DB Engine...
INFO:automation.service.database.AutomationDB:Init AutomationService
INFO:common.tools.database.GenericEngine: Database initalized with DB URL: cockroachdb://tfs:tfs123@cockroachdb-public.crdb.svc.cluster.local:26257/tfs_automation?sslmode=require
INFO:automation.service.AutomationServiceServicerImpl:Init AutomationService
INFO:automation.service.AutomationService:Starting Service (tentative endpoint: 0.0.0.0:30200, max_workers: 200)...
INFO:automation.service.AutomationService:Listening on 0.0.0.0:30200...
WARNING:__main__:Terminate signal received
INFO:__main__:Terminating...
Traceback (most recent call last):
  File "/usr/local/lib/python3.9/runpy.py", line 197, in _run_module_as_main
    return _run_code(code, main_globals, None,
  File "/usr/local/lib/python3.9/runpy.py", line 87, in _run_code
    exec(code, run_globals)
  File "/var/teraflow/automation/service/__main__.py", line 94, in <module>
    sys.exit(main())
  File "/var/teraflow/automation/service/__main__.py", line 88, in main
    event_engine.stop()
NameError: name 'event_engine' is not defined

Expected behaviour

• Automation service should bootstrap without issues

Acknowledgements

This work is funded by the European Commission through the HORIZON-JU-SNS-2022 FLEX-SCALE project with grant agreement number 101096909.