Resolve "Geo: Make hashed storage a hard requirement in 12.0"

ee/app/models/geo_node.rb

@@ -37,7 +37,8 @@ class GeoNode < ApplicationRecord
   validates :verification_max_capacity, numericality: { greater_than_or_equal_to: 0 }
   validates :minimum_reverification_interval, numericality: { greater_than_or_equal_to: 1 }
 
-  validate :check_not_adding_primary_as_secondary, if: :secondary?
+  validate :require_current_node_to_be_primary, if: :secondary?
+  validate :require_hashed_storage, on: :create
 
   after_save :expire_cache!
   after_destroy :expire_cache!
@@ -287,12 +288,19 @@ class GeoNode < ApplicationRecord
   end
 
   # Prevent locking yourself out
-  def check_not_adding_primary_as_secondary
+  def require_current_node_to_be_primary
     if name == self.class.current_node_name
       errors.add(:base, 'Current node must be the primary node or you will be locking yourself out')
     end
   end
 
+  # Prevent creating a Geo Node unless Hashed Storage is enabled
+  def require_hashed_storage
+    unless Gitlab::CurrentSettings.hashed_storage_enabled?
+      errors.add(:base, 'Hashed Storage must be enabled to use Geo')
+    end
+  end
+
   def update_clone_url
     self.clone_url_prefix = Gitlab.config.gitlab_shell.ssh_path_prefix
   end

ee/changelogs/unreleased/8690-geo-require-hashed-storage.yml

+---
+title: Require Hashed Storage to be enabled to create new Geo Nodes
+merge_request: 14102
+author:
+type: changed

ee/spec/models/geo_node_spec.rb

@@ -94,6 +94,22 @@ describe GeoNode, :geo, type: :model do
         it { is_expected.not_to be_valid }
       end
     end
+
+    context 'when validating requirement for hashed storage' do
+      subject { build(:geo_node) }
+
+      context 'when hashed storage is enabled' do
+        it { is_expected.to be_valid }
+      end
+
+      context 'when hashed_storage is disabled' do
+        before do
+          stub_application_setting(hashed_storage_enabled: false)
+        end
+
+        it { is_expected.to be_invalid }
+      end
+    end
   end
 
   context 'default values' do
@@ -110,7 +126,7 @@ describe GeoNode, :geo, type: :model do
   context 'prevent locking yourself out' do
     it 'does not accept adding a non primary node with same details as current_node' do
       stub_geo_setting(node_name: 'foo')
-      node = build(:geo_node, :primary, primary: false, name: 'foo')
+      node = build(:geo_node, primary: false, name: 'foo')
 
       expect(node).not_to be_valid
       expect(node.errors.full_messages.count).to eq(1)