Trigger worker to fetch suggested reviewers

What does this MR do and why?

Trigger worker to fetch suggested- reviewers

• Behind a feature flag
• Idea #373173 (comment 1114922558)

Related to #373173 (closed)

Logs of run

1. Setup the environment and enabled the project

bin/rails c
[1] pry(main)> mr = MergeRequest.find(162)
[3] pry(main)> Feature.enable(:suggested_reviewers_control, mr.project)
=> true

2. I've commit to an MR

3. Here are the logs, failed due to machine learning API not being available

log/sidekiq.log:{"severity":"INFO","time":"2022-09-29T14:10:05.884Z","retry":25,"queue":"default","backtrace":true,"version":0,"args":["162"],"class":"MergeRequests::FetchSuggestedReviewersWorker","jid":"e77866c7d6b392e318df75de","created_at":"2022-09-29T14:10:05.860Z","correlation_id":"01GE4SAB7E15AEVM6523TPB9GF","meta.caller_id":"UpdateMergeRequestsWorker","meta.remote_ip":"172.16.123.1","meta.feature_category":"workflow_automation","meta.user":"test1","meta.project":"zama/zingo","meta.root_namespace":"zama","meta.client_id":"user/46","meta.root_caller_id":"POST /api/:version/internal/post_receive","worker_data_consistency":"always","idempotency_key":"resque:gitlab:duplicate:default:855f6be34663d057be39008b5e9d7709a7a68c6a7193b784c821a7e13cb7b253","size_limiter":"validated","enqueued_at":"2022-09-29T14:10:05.863Z","job_size_bytes":5,"pid":223678,"message":"MergeRequests::FetchSuggestedReviewersWorker JID-e77866c7d6b392e318df75de: start","job_status":"start","scheduling_latency_s":0.020641}
log/sidekiq.log:{"severity":"WARN","time":"2022-09-29T14:10:14.619Z","retry":25,"queue":"default","backtrace":true,"version":0,"args":["162"],"class":"MergeRequests::FetchSuggestedReviewersWorker","jid":"e77866c7d6b392e318df75de","created_at":"2022-09-29T14:10:05.860Z","correlation_id":"01GE4SAB7E15AEVM6523TPB9GF","meta.caller_id":"UpdateMergeRequestsWorker","meta.remote_ip":"172.16.123.1","meta.feature_category":"workflow_automation","meta.user":"test1","meta.project":"zama/zingo","meta.root_namespace":"zama","meta.client_id":"user/46","meta.root_caller_id":"POST /api/:version/internal/post_receive","worker_data_consistency":"always","idempotency_key":"resque:gitlab:duplicate:default:855f6be34663d057be39008b5e9d7709a7a68c6a7193b784c821a7e13cb7b253","size_limiter":"validated","enqueued_at":"2022-09-29T14:10:05.863Z","job_size_bytes":5,"pid":223678,"message":"MergeRequests::FetchSuggestedReviewersWorker JID-e77866c7d6b392e318df75de: fail: 8.731836 sec","job_status":"fail","scheduling_latency_s":0.020641,"redis_calls":3,"redis_duration_s":0.00038,"redis_read_bytes":9,"redis_write_bytes":249,"redis_queues_calls":3,"redis_queues_duration_s":0.00038,"redis_queues_read_bytes":9,"redis_queues_write_bytes":249,"db_count":5,"db_write_count":0,"db_cached_count":0,"db_replica_count":0,"db_primary_count":5,"db_main_count":5,"db_ci_count":0,"db_main_replica_count":0,"db_ci_replica_count":0,"db_replica_cached_count":0,"db_primary_cached_count":0,"db_main_cached_count":0,"db_ci_cached_count":0,"db_main_replica_cached_count":0,"db_ci_replica_cached_count":0,"db_replica_wal_count":0,"db_primary_wal_count":0,"db_main_wal_count":0,"db_ci_wal_count":0,"db_main_replica_wal_count":0,"db_ci_replica_wal_count":0,"db_replica_wal_cached_count":0,"db_primary_wal_cached_count":0,"db_main_wal_cached_count":0,"db_ci_wal_cached_count":0,"db_main_replica_wal_cached_count":0,"db_ci_replica_wal_cached_count":0,"db_replica_duration_s":0.0,"db_primary_duration_s":0.023,"db_main_duration_s":0.023,"db_ci_duration_s":0.0,"db_main_replica_duration_s":0.0,"db_ci_replica_duration_s":0.0,"cpu_s":0.167258,"worker_id":"sidekiq_0","rate_limiting_gates":[],"duration_s":8.731836,"completed_at":"2022-09-29T14:10:14.616Z","load_balancing_strategy":"primary","exception.class":"Gitlab::AppliedMl::Errors::ConfigurationError","exception.message":"Variable SUGGESTED_REVIEWERS_SECRET is missing","exception.backtrace":["ee/lib/gitlab/applied_ml/suggested_reviewers/client.rb:61:in `read_secret!'","ee/lib/gitlab/applied_ml/suggested_reviewers/client.rb:29:in `initialize'","ee/app/services/merge_requests/fetch_suggested_reviewers_service.rb:22:in `new'","ee/app/services/merge_requests/fetch_suggested_reviewers_service.rb:22:in `suggested_reviewers'","ee/app/services/merge_requests/fetch_suggested_reviewers_service.rb:6:in `execute'","ee/app/workers/merge_requests/fetch_suggested_reviewers_worker.rb:26:in `perform'","lib/gitlab/sidekiq_middleware/duplicate_jobs/strategies/until_executed.rb:17:in `perform'","lib/gitlab/sidekiq_middleware/duplicate_jobs/duplicate_job.rb:58:in `perform'","lib/gitlab/sidekiq_middleware/duplicate_jobs/server.rb:8:in `call'","lib/gitlab/sidekiq_middleware/worker_context.rb:9:in `wrap_in_optional_context'","lib/gitlab/sidekiq_middleware/worker_context/server.rb:19:in `block in call'","lib/gitlab/application_context.rb:113:in `block in use'","lib/gitlab/application_context.rb:113:in `use'","lib/gitlab/application_context.rb:54:in `with_context'","lib/gitlab/sidekiq_middleware/worker_context/server.rb:17:in `call'","lib/gitlab/sidekiq_status/server_middleware.rb:7:in `call'","lib/gitlab/sidekiq_versioning/middleware.rb:9:in `call'","lib/gitlab/sidekiq_middleware/query_analyzer.rb:7:in `block in call'","lib/gitlab/database/query_analyzer.rb:37:in `within'","lib/gitlab/sidekiq_middleware/query_analyzer.rb:7:in `call'","lib/gitlab/sidekiq_middleware/admin_mode/server.rb:14:in `call'","lib/gitlab/sidekiq_middleware/instrumentation_logger.rb:9:in `call'","lib/gitlab/sidekiq_middleware/batch_loader.rb:7:in `call'","lib/gitlab/sidekiq_middleware/extra_done_log_metadata.rb:7:in `call'","lib/gitlab/sidekiq_middleware/request_store_middleware.rb:10:in `block in call'","lib/gitlab/with_request_store.rb:17:in `enabling_request_store'","lib/gitlab/with_request_store.rb:10:in `with_request_store'","lib/gitlab/sidekiq_middleware/request_store_middleware.rb:9:in `call'","lib/gitlab/sidekiq_middleware/server_metrics.rb:76:in `block in call'","lib/gitlab/sidekiq_middleware/server_metrics.rb:103:in `block in instrument'","lib/gitlab/metrics/background_transaction.rb:33:in `run'","lib/gitlab/sidekiq_middleware/server_metrics.rb:103:in `instrument'","lib/gitlab/sidekiq_middleware/server_metrics.rb:75:in `call'","lib/gitlab/sidekiq_middleware/monitor.rb:10:in `block in call'","lib/gitlab/sidekiq_daemon/monitor.rb:49:in `within_job'","lib/gitlab/sidekiq_middleware/monitor.rb:9:in `call'","lib/gitlab/sidekiq_middleware/size_limiter/server.rb:13:in `call'","lib/gitlab/sidekiq_logging/structured_logger.rb:21:in `call'"],"db_duration_s":0.012465}

How to set up and validate locally

1. Ensure a SaaS (Gitlab.com) environment
   • One way of doing this is to add a env.runit file to the root GDK folder with the following snippet export GITLAB_SIMULATE_SAAS=1
2. Set ultimate license on a group http://gdk.test:3000/admin/groups
3. Create a project in the ultimate group
4. Set the feature flag on rails console bin/rails c

project = Project.find(id-of-your-project) in the rail console
Feature.enable(:suggested_reviewers_control, project)

1. Create a merge request on the project
2. Push code to the merge request
3. You should see some failed workers in the sidekiq logs (due to lack of authentication) and some failed jobs in admin panel http://gdk.test:3000/admin/background_jobs

grep -r FetchSuggestedReviewersWorker log/sidekiq*

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.