set display name for workers

playbooks/roles/edxapp/templates/workers.conf.j2

 {% for w in edxapp_workers %}
 [program:{{ w.service_variant }}_{{ w.queue }}_{{ w.concurrency }}]
 
-environment={% if COMMON_ENABLE_NEWRELIC_APP %}NEW_RELIC_APP_NAME={{ EDXAPP_NEWRELIC_WORKERS_APPNAME }},NEW_RELIC_LICENSE_KEY={{ NEWRELIC_LICENSE_KEY }},{% endif -%}CONCURRENCY={{ w.concurrency }},LOGLEVEL=info,DJANGO_SETTINGS_MODULE={{ worker_django_settings_module }},LANG={{ EDXAPP_LANG }},PYTHONPATH={{ edxapp_code_dir }},SERVICE_VARIANT={{ w.service_variant }},BOTO_CONFIG="{{ edxapp_app_dir }}/.boto"
+environment={% if COMMON_ENABLE_NEWRELIC_APP %}NEW_RELIC_APP_NAME={{ EDXAPP_NEWRELIC_WORKERS_APPNAME }},NEW_RELIC_LICENSE_KEY={{ NEWRELIC_LICENSE_KEY }},{% endif -%}CONCURRENCY={{ w.concurrency }},LOGLEVEL=info,DJANGO_SETTINGS_MODULE={{ worker_django_settings_module }},LANG={{ EDXAPP_LANG }},PYTHONPATH={{ edxapp_code_dir }},SERVICE_VARIANT={{ w.service_variant }},BOTO_CONFIG="{{ edxapp_app_dir }}/.boto,"
 user={{ common_web_user }}
 directory={{ edxapp_code_dir }}
 stdout_logfile={{ supervisor_log_dir }}/%(program_name)s-stdout.log
 stderr_logfile={{ supervisor_log_dir }}/%(program_name)s-stderr.log
 
-command={{ edxapp_venv_dir + '/bin/newrelic-admin run-program ' if w.monitor and COMMON_ENABLE_NEWRELIC_APP else ''}}{{ edxapp_venv_bin }}/python {{ edxapp_code_dir }}/manage.py {{ w.service_variant }} --settings={{ worker_django_settings_module }} celery worker --loglevel=info --queues=edx.{{ w.service_variant }}.core.{{ w.queue }} --hostname=edx.{{ w.service_variant }}.core.{{ w.queue }}.%%h --concurrency={{ w.concurrency }} {{ '--maxtasksperchild ' + w.max_tasks_per_child|string if w.max_tasks_per_child is defined else '' }}
+command={% if COMMON_ENABLE_NEWRELIC_APP %}NEW_RELIC_PROCESS_HOST_DISPLAY_NAME=`hostname`-`ec2metadata --instance-id`;{% endif -%}{{ edxapp_venv_dir + '/bin/newrelic-admin run-program ' if w.monitor and COMMON_ENABLE_NEWRELIC_APP else ''}}{{ edxapp_venv_bin }}/python {{ edxapp_code_dir }}/manage.py {{ w.service_variant }} --settings={{ worker_django_settings_module }} celery worker --loglevel=info --queues=edx.{{ w.service_variant }}.core.{{ w.queue }} --hostname=edx.{{ w.service_variant }}.core.{{ w.queue }}.%%h --concurrency={{ w.concurrency }} {{ '--maxtasksperchild ' + w.max_tasks_per_child|string if w.max_tasks_per_child is defined else '' }}
 killasgroup=true
 stopwaitsecs={{ w.stopwaitsecs | default(EDXAPP_WORKER_DEFAULT_STOPWAITSECS) }}
 ; Set autorestart to `true`. The default value for autorestart is `unexpected`, but celery < 4.x will exit