Disable DD tracing when testing docker image

Author: jenshenny

config/puma.rb

@@ -28,10 +28,6 @@
 
 require "concurrent"
 
-# Disable preload_app to prevent Datadog profiler from starting before fork
-# (preload_app! is now ON by default in Puma 7.x)
-preload_app!(false)
-
 if production_like
   # Specifies that the worker count should equal the number of processors in production.
   worker_count = Integer(ENV.fetch("WEB_CONCURRENCY") { Concurrent.physical_processor_count })

script/build_docker.sh

@@ -29,15 +29,18 @@ docker buildx build --cache-from=type=local,src=/tmp/.buildx-cache \
 # This is a ruby script we run to ensure that all dependencies are configured properly in
 # the docker container, even if they are not used in the the few requests made to the application.
 docker run -e RAILS_ENV=production -e SECRET_KEY_BASE_DUMMY=1 -e DATABASE_URL=postgresql://localhost \
+  -e DD_TRACE_ENABLED=false -e DD_PROFILING_ENABLED=false \
   --net host "$DOCKER_TAG" \
   -- bin/rails runner - <<-EOS
 Magic.buffer('')
 EOS
 
 docker run -e RAILS_ENV=production -e SECRET_KEY_BASE_DUMMY=1 -e DATABASE_URL=postgresql://localhost \
+  -e DD_TRACE_ENABLED=false -e DD_PROFILING_ENABLED=false \
   --net host "$DOCKER_TAG" \
   -- bin/rails db:create db:migrate
 docker run -d -e RAILS_ENV=production -e SECRET_KEY_BASE_DUMMY=1 -e DATABASE_URL=postgresql://localhost \
+  -e DD_TRACE_ENABLED=false -e DD_PROFILING_ENABLED=false \
   --net host "$DOCKER_TAG" \
   -- puma --environment production --config /app/config/puma.rb