feat: Add variables to enable DD profiling.

We want to be able to turn on profiling separate
from Datadog in general. Introduce a new variable that could
be set per-environment.

playbooks/roles/common_vars/defaults/main.yml

@@ -103,6 +103,7 @@ COMMON_ENABLE_DATADOG: False
 # Enable APM monitoring with Datadog (metrics, traces, and logs)
 COMMON_ENABLE_DATADOG_APP: False
 COMMON_ENABLE_DATADOG_APP_SERVICES: []
+COMMON_ENABLE_DATADOG_PROFILING: False
 COMMON_ENABLE_NGINXTRA: False
 COMMON_ENABLE_SPLUNKFORWARDER: False
 COMMON_ENABLE_NEWRELIC: False

playbooks/roles/edxapp/defaults/main.yml

@@ -631,6 +631,7 @@ EDXAPP_XML_S3_BUCKET: !!null
 EDXAPP_XML_S3_KEY: !!null
 
 EDXAPP_DATADOG_ENABLE: "{{COMMON_ENABLE_DATADOG and COMMON_ENABLE_DATADOG_APP}}"
+EDXAPP_DATADOG_PROFILING_ENABLE: "{{EDXAPP_DATADOG_ENABLE and COMMON_ENABLE_DATADOG_PROFILING}}"
 # ddtrace 2.7.9 contains a fix for a pymongo incompatibility.
 # (Same fix is present in 2.8.2 on the 2.8.x release line.)
 EDXAPP_DDTRACE_PIP_SPEC: 'ddtrace>=2.7.9'

playbooks/roles/edxapp/templates/edx/app/edxapp/cms.sh.j2

@@ -26,6 +26,11 @@ export DD_TRACE_LOG_STREAM_HANDLER=false
 export DD_DJANGO_INSTRUMENT_MIDDLEWARE=false
 {% endif -%}
 
+# We want to be able to toggle this on separately from DD in general.
+{% if EDXAPP_DATADOG_PROFILING_ENABLE %}
+export DD_PROFILING_ENABLED=true
+{% endif -%}
+
 export PORT="{{ edxapp_cms_gunicorn_port }}"
 export ADDRESS="{{ edxapp_cms_gunicorn_host }}"
 export LANG="{{ EDXAPP_LANG }}"

playbooks/roles/edxapp/templates/edx/app/edxapp/lms.sh.j2

@@ -27,6 +27,11 @@ export DD_DJANGO_INSTRUMENT_MIDDLEWARE=false
 
 {% endif -%}
 
+# We want to be able to toggle this on separately from DD in general.
+{% if EDXAPP_DATADOG_PROFILING_ENABLE %}
+export DD_PROFILING_ENABLED=true
+{% endif -%}
+
 export PORT="{{ edxapp_lms_gunicorn_port }}"
 export ADDRESS="{{ edxapp_lms_gunicorn_host }}"
 export LANG="{{ EDXAPP_LANG }}"

playbooks/roles/edxapp/templates/edx/app/edxapp/worker.sh.j2

@@ -26,6 +26,10 @@ export DD_TRACE_LOG_STREAM_HANDLER=false
 export DD_DJANGO_INSTRUMENT_MIDDLEWARE=false
 {% endif -%}
 
+# We want to be able to toggle this on separately from DD in general.
+{% if EDXAPP_DATADOG_PROFILING_ENABLE %}
+export DD_PROFILING_ENABLED=true
+{% endif -%}
 
 # We exec so that celery is the child of supervisor and can be managed properly