diff --git a/app/services/projects/participants_service.rb b/app/services/projects/participants_service.rb
index c7a34afffb3..c29770d0c5f 100644
--- a/app/services/projects/participants_service.rb
+++ b/app/services/projects/participants_service.rb
@@ -45,7 +45,7 @@ module Projects
     def visible_groups
       visible_groups = project.invited_groups
 
-      unless project_owner?
+      unless project.team.owner?(current_user)
         visible_groups = visible_groups.public_or_visible_to_user(current_user)
       end
 
@@ -60,13 +60,5 @@ module Projects
     def individual_project_members
       project.project_members.select(*GroupMember.cached_column_list)
     end
-
-    def project_owner?
-      if project.group.present?
-        project.group.owners.include?(current_user)
-      else
-        project.namespace.owner == current_user
-      end
-    end
   end
 end
diff --git a/doc/api/resource_groups.md b/doc/api/resource_groups.md
index 237ba6e7d72..f70ad2f09e7 100644
--- a/doc/api/resource_groups.md
+++ b/doc/api/resource_groups.md
@@ -8,6 +8,34 @@ info: To determine the technical writer assigned to the Stage/Group associated w
 
 You can read more about [controlling the job concurrency with resource groups](../ci/resource_groups/index.md).
 
+## Get all resource groups for a project
+
+```plaintext
+GET /projects/:id/resource_groups
+```
+
+| Attribute | Type    | Required | Description         |
+|-----------|---------|----------|---------------------|
+| `id`      | integer/string     | yes      | The ID or [URL-encoded path of the project](index.md#namespaced-path-encoding) owned by the authenticated user |
+
+```shell
+curl --header "PRIVATE-TOKEN: <your_access_token>" "https://gitlab.example.com/api/v4/projects/1/resource_groups"
+```
+
+Example of response
+
+```json
+[
+  {
+    "id": 3,
+    "key": "production",
+    "process_mode": "unordered",
+    "created_at": "2021-09-01T08:04:59.650Z",
+    "updated_at": "2021-09-01T08:04:59.650Z"
+  }
+]
+```
+
 ## Get a specific resource group
 
 ```plaintext
diff --git a/lib/api/ci/resource_groups.rb b/lib/api/ci/resource_groups.rb
index 3c8c68caeae..e3fd887475a 100644
--- a/lib/api/ci/resource_groups.rb
+++ b/lib/api/ci/resource_groups.rb
@@ -3,6 +3,8 @@
 module API
   module Ci
     class ResourceGroups < ::API::Base
+      include PaginationParams
+
       before { authenticate! }
 
       feature_category :continuous_delivery
@@ -12,6 +14,18 @@ module API
         requires :id, type: String, desc: 'The ID of a project'
       end
       resource :projects, requirements: ::API::API::NAMESPACE_OR_PROJECT_REQUIREMENTS do
+        desc 'Get all resource groups for this project' do
+          success Entities::Ci::ResourceGroup
+        end
+        params do
+          use :pagination
+        end
+        get ':id/resource_groups' do
+          authorize! :read_resource_group, user_project
+
+          present paginate(user_project.resource_groups), with: Entities::Ci::ResourceGroup
+        end
+
         desc 'Get a single resource group' do
           success Entities::Ci::ResourceGroup
         end
diff --git a/lib/gitlab/testing/clear_process_memory_cache_middleware.rb b/lib/gitlab/testing/clear_process_memory_cache_middleware.rb
index 1e69e5e142d..39bcad271be 100644
--- a/lib/gitlab/testing/clear_process_memory_cache_middleware.rb
+++ b/lib/gitlab/testing/clear_process_memory_cache_middleware.rb
@@ -11,6 +11,8 @@ module Gitlab
         Gitlab::ProcessMemoryCache.cache_backend.clear
 
         @app.call(env)
+      ensure
+        Gitlab::ProcessMemoryCache.cache_backend.clear
       end
     end
   end
diff --git a/spec/requests/api/ci/resource_groups_spec.rb b/spec/requests/api/ci/resource_groups_spec.rb
index f5b68557a0d..864c363e6d3 100644
--- a/spec/requests/api/ci/resource_groups_spec.rb
+++ b/spec/requests/api/ci/resource_groups_spec.rb
@@ -9,6 +9,36 @@ RSpec.describe API::Ci::ResourceGroups do
 
   let(:user) { developer }
 
+  describe 'GET /projects/:id/resource_groups' do
+    subject { get api("/projects/#{project.id}/resource_groups", user) }
+
+    let!(:resource_groups) { create_list(:ci_resource_group, 3, project: project) }
+
+    it 'returns all resource groups for this project', :aggregate_failures do
+      subject
+
+      expect(response).to have_gitlab_http_status(:ok)
+      expect(response).to include_pagination_headers
+      resource_groups.each_index do |i|
+        expect(json_response[i]['id']).to eq(resource_groups[i].id)
+        expect(json_response[i]['key']).to eq(resource_groups[i].key)
+        expect(json_response[i]['process_mode']).to eq(resource_groups[i].process_mode)
+        expect(Time.parse(json_response[i]['created_at'])).to be_like_time(resource_groups[i].created_at)
+        expect(Time.parse(json_response[i]['updated_at'])).to be_like_time(resource_groups[i].updated_at)
+      end
+    end
+
+    context 'when user is reporter' do
+      let(:user) { reporter }
+
+      it 'returns forbidden' do
+        subject
+
+        expect(response).to have_gitlab_http_status(:forbidden)
+      end
+    end
+  end
+
   describe 'GET /projects/:id/resource_groups/:key' do
     subject { get api("/projects/#{project.id}/resource_groups/#{key}", user) }
 
diff --git a/spec/support/helpers/query_recorder.rb b/spec/support/helpers/query_recorder.rb
index d18a1d23584..01839a74e65 100644
--- a/spec/support/helpers/query_recorder.rb
+++ b/spec/support/helpers/query_recorder.rb
@@ -80,7 +80,8 @@ module ActiveRecord
 
       if values[:cached] && skip_cached
         @cached << values[:sql]
-      elsif !skip_schema_queries || !values[:name]&.include?("SCHEMA")
+      elsif !ignorable?(values)
+
         backtrace = @query_recorder_debug ? show_backtrace(values, duration) : nil
         @log << values[:sql]
         store_sql_by_source(values: values, duration: duration, backtrace: backtrace)
@@ -102,5 +103,12 @@ module ActiveRecord
     def occurrences
       @occurrences ||= @log.group_by(&:to_s).transform_values(&:count)
     end
+
+    def ignorable?(values)
+      return true if skip_schema_queries && values[:name]&.include?("SCHEMA")
+      return true if values[:name]&.match(/License Load/)
+
+      false
+    end
   end
 end