diff --git a/changelogs/unreleased/make-ci-api-to-always-use-primary.yml b/changelogs/unreleased/make-ci-api-to-always-use-primary.yml
new file mode 100644
index 0000000000000000000000000000000000000000..2c2f9765f1858ad6a528bd24ce59b3e73e7a058a
--- /dev/null
+++ b/changelogs/unreleased/make-ci-api-to-always-use-primary.yml
@@ -0,0 +1,4 @@
+---
+title: Make CI API to always use primary DB
+merge_request:
+author:
diff --git a/lib/api/runner.rb b/lib/api/runner.rb
index 4c9db2c87161591bbd0f0f2bbf984d34663ff024..a804afac27c8031641ff2c5738a521ca3e493ae7 100644
--- a/lib/api/runner.rb
+++ b/lib/api/runner.rb
@@ -61,6 +61,10 @@ class Runner < Grape::API
     end
 
     resource :jobs do
+      before do
+        Gitlab::Database::LoadBalancing::Session.current.use_primary!
+      end
+
       desc 'Request a job' do
         success Entities::JobRequest::Response
         http_codes [[201, 'Job was scheduled'],
diff --git a/lib/ci/api/builds.rb b/lib/ci/api/builds.rb
index 746e76a1b1f1d8b9ed5ab6aedbb6435df58e8fd5..c98e6f2fc0613526778e69d61387cfdb1207f490 100644
--- a/lib/ci/api/builds.rb
+++ b/lib/ci/api/builds.rb
@@ -3,6 +3,10 @@ module API
     # Builds API
     class Builds < Grape::API
       resource :builds do
+        before do
+          Gitlab::Database::LoadBalancing::Session.current.use_primary!
+        end
+
         # Runs oldest pending build by runner - Runners only
         #
         # Parameters: