Get memory data after booting app in production62722-boot-app-in-ci-and-check-memory

Preload the app in `production` env, hit it with a single request, and
gather total gem memory consumption data using `derailed exec perf:mem`
from `derailed_benchmarks`. Present the result as MR metrics.

2 files changed, 16 insertions, 4 deletions

diff --git a/scripts/generate-memory-metrics-on-boot b/scripts/generate-memory-metrics-on-boot
new file mode 100755
index 00000000000..5197a8fcdcd
--- /dev/null
+++ b/scripts/generate-memory-metrics-on-boot
@@ -0,0 +1,11 @@
+#!/usr/bin/env ruby
+
+abort "usage: #{__FILE__} <memory_bundle_mem_file_name>" unless ARGV.length == 1
+memory_bundle_mem_file_name = ARGV.first
+
+full_report = File.open(memory_bundle_mem_file_name).read
+
+stats = /TOP: (?<total_mibs_str>.*) MiB/.match(full_report)
+abort 'failed to process the benchmark output' unless stats
+
+puts "total_memory_used_by_dependencies_on_boot_prod_env_mb #{stats[:total_mibs_str].to_f.round(1)}"
diff --git a/scripts/prepare_build.sh b/scripts/prepare_build.sh
index 9b0d5d4f719..c1cade0a820 100644
--- a/scripts/prepare_build.sh
+++ b/scripts/prepare_build.sh
@@ -35,6 +35,7 @@ sed -i 's/username: root/username: gitlab/g' config/database.yml
 
 if [ "$GITLAB_DATABASE" = 'postgresql' ]; then
   sed -i 's/localhost/postgres/g' config/database.yml
+  sed -i 's/username: git/username: postgres/g' config/database.yml
 
   if [ -f config/database_geo.yml ]; then
     sed -i 's/localhost/postgres/g' config/database_geo.yml
@@ -48,16 +49,16 @@ else # Assume it's mysql
 fi
 
 cp config/resque.yml.example config/resque.yml
-sed -i 's/localhost/redis/g' config/resque.yml
+sed -i 's|url:.*$|url: redis://redis:6379|g' config/resque.yml
 
 cp config/redis.cache.yml.example config/redis.cache.yml
-sed -i 's/localhost/redis/g' config/redis.cache.yml
+sed -i 's|url:.*$|url: redis://redis:6379/10|g' config/redis.cache.yml
 
 cp config/redis.queues.yml.example config/redis.queues.yml
-sed -i 's/localhost/redis/g' config/redis.queues.yml
+sed -i 's|url:.*$|url: redis://redis:6379/11|g' config/redis.queues.yml
 
 cp config/redis.shared_state.yml.example config/redis.shared_state.yml
-sed -i 's/localhost/redis/g' config/redis.shared_state.yml
+sed -i 's|url:.*$|url: redis://redis:6379/12|g' config/redis.shared_state.yml
 
 if [ "$SETUP_DB" != "false" ]; then
   setup_db