Prevent git push on secondary geo nodes.

lib/gitlab/git_access.rb

@@ -113,6 +113,10 @@ module Gitlab
         return build_status_object(false, "A repository for this project does not exist yet.")
       end
 
+      if Gitlab::Geo.enabled? && Gitlab::Geo.readonly?
+        return build_status_object(false, "You can't push code on a secondary Gitlab Geo node.")
+      end
+
       if ::License.block_changes?
         message = ::LicenseHelper.license_message(signed_in: true, is_admin: (user && user.is_admin?))
         return build_status_object(false, message)

lib/gitlab/git_access_wiki.rb

 module Gitlab
   class GitAccessWiki < GitAccess
     def change_access_check(change)
-      if user.can?(:create_wiki, project)
+      if Gitlab::Geo.enabled? && Gitlab::Geo.readonly?
+        build_status_object(false, "You can't push code on a secondary Gitlab Geo node.")
+      elsif user.can?(:create_wiki, project)
         build_status_object(true)
       else
         build_status_object(false, "You are not allowed to write to this project's wiki.")

spec/lib/gitlab/git_access_spec.rb

@@ -249,6 +249,28 @@ describe Gitlab::GitAccess, lib: true do
       end
     end
 
+    context "when in a readonly gitlab geo node" do
+      before do
+        allow(Gitlab::Geo).to receive(:enabled?) { true }
+        allow(Gitlab::Geo).to receive(:readonly?) { true }
+      end
+
+      permissions_matrix.keys.each do |role|
+        describe "#{role} access" do
+          before { protect_feature_branch }
+          before { project.team << [user, role] }
+
+          permissions_matrix[role].each do |action, allowed|
+            context action do
+              subject { access.push_access_check(changes[action]) }
+
+              it { expect(subject.allowed?).to be_falsey }
+            end
+          end
+        end
+      end
+    end
+
     context "when using git annex" do
       before { project.team << [user, :master] }
 

spec/lib/gitlab/git_access_wiki_spec.rb

@@ -4,8 +4,10 @@ describe Gitlab::GitAccessWiki, lib: true do
   let(:access) { Gitlab::GitAccessWiki.new(user, project) }
   let(:project) { create(:project) }
   let(:user) { create(:user) }
+  let(:changes) { ['6f6d7e7ed 570e7b2ab refs/heads/master'] }
 
-  describe 'push_allowed?' do
+  describe '#push_access_check' do
+    context 'when user can :create_wiki' do
       before do
         create(:protected_branch, name: 'master', project: project)
         project.team << [user, :developer]
@@ -14,9 +16,16 @@ describe Gitlab::GitAccessWiki, lib: true do
       subject { access.push_access_check(changes) }
 
       it { expect(subject.allowed?).to be_truthy }
+
+      context 'when in a readonly gitlab geo node' do
+        before do
+          allow(Gitlab::Geo).to receive(:enabled?) { true }
+          allow(Gitlab::Geo).to receive(:readonly?) { true }
+        end
+
+        it { expect(subject.allowed?).to be_falsey }
+      end
     end
 
-  def changes
-    ['6f6d7e7ed 570e7b2ab refs/heads/master']
   end
 end