Add option to configure redis snapshotting

files/gitlab-config-template/gitlab.rb.template

@@ -784,6 +784,11 @@ external_url 'GENERATED_EXTERNAL_URL'
 # redis['client_output_buffer_limit_slave'] = '256mb 64mb 60'
 # redis['client_output_buffer_limit_pubsub'] = '32mb 8mb 60'
 
+#####! Redis snapshotting frequency
+#####! Set to [] to disable
+#####! Set to [''] to clear previously set values
+# redis['save'] = [ '900 1', '300 10', '60 10000' ]
+
 ################################################################################
 ## GitLab Web server
 ##! Docs: https://docs.gitlab.com/omnibus/settings/nginx.html#using-a-non-bundled-web-server

files/gitlab-cookbooks/gitlab/attributes/default.rb

@@ -473,6 +473,7 @@ default['gitlab']['redis']['master_password'] = nil
 default['gitlab']['redis']['client_output_buffer_limit_normal'] = "0 0 0"
 default['gitlab']['redis']['client_output_buffer_limit_slave'] = "256mb 64mb 60"
 default['gitlab']['redis']['client_output_buffer_limit_pubsub'] = "32mb 8mb 60"
+default['gitlab']['redis']['save'] = ['900 1', '300 10', '60 10000']
 
 ####
 # Web server

files/gitlab-cookbooks/gitlab/templates/default/redis.conf.erb

@@ -203,9 +203,15 @@ databases 16
 #
 #   save ""
 
-save 900 1
-save 300 10
-save 60 10000
+<% unless @save.empty? %>
+<% if @save.any?(&:empty?) %>
+save ""
+<% else %>
+<% @save.each do |line| %>
+<%= "save #{line}" %>
+<% end %>
+<% end %>
+<% end %>
 
 # By default Redis will stop accepting writes if RDB snapshots are enabled
 # (at least one save point) and the latest background save failed.

spec/chef/recipes/redis_spec.rb

@@ -15,6 +15,12 @@ describe 'gitlab::redis' do
         .with_content(/client-output-buffer-limit slave 256mb 64mb 60/)
       expect(chef_run).to render_file('/var/opt/gitlab/redis/redis.conf')
         .with_content(/client-output-buffer-limit pubsub 32mb 8mb 60/)
+      expect(chef_run).to render_file('/var/opt/gitlab/redis/redis.conf')
+        .with_content(/^save 900 1/)
+      expect(chef_run).to render_file('/var/opt/gitlab/redis/redis.conf')
+        .with_content(/^save 300 10/)
+      expect(chef_run).to render_file('/var/opt/gitlab/redis/redis.conf')
+        .with_content(/^save 60 10000/)
     end
   end
 
@@ -24,7 +30,8 @@ describe 'gitlab::redis' do
         redis: {
           client_output_buffer_limit_normal: "5 5 5",
           client_output_buffer_limit_slave: "512mb 128mb 120",
-          client_output_buffer_limit_pubsub: "64mb 16mb 120"
+          client_output_buffer_limit_pubsub: "64mb 16mb 120",
+          save: ["10 15000"]
         }
       )
     end
@@ -36,6 +43,37 @@ describe 'gitlab::redis' do
         .with_content(/client-output-buffer-limit slave 512mb 128mb 120/)
       expect(chef_run).to render_file('/var/opt/gitlab/redis/redis.conf')
         .with_content(/client-output-buffer-limit pubsub 64mb 16mb 120/)
+      expect(chef_run).to render_file('/var/opt/gitlab/redis/redis.conf')
+        .with_content(/^save 10 15000/)
+    end
+  end
+
+  context 'with snapshotting disabled' do
+    before do
+      stub_gitlab_rb(
+        redis: {
+          save: []
+        }
+      )
+    end
+    it 'creates redis config without save setting' do
+      expect(chef_run).to render_file('/var/opt/gitlab/redis/redis.conf')
+      expect(chef_run).not_to render_file('/var/opt/gitlab/redis/redis.conf')
+        .with_content(/^save/)
+    end
+  end
+
+  context 'with snapshotting cleared' do
+    before do
+      stub_gitlab_rb(
+        redis: {
+          save: [""]
+        }
+      )
+    end
+    it 'creates redis config without save setting' do
+      expect(chef_run).to render_file('/var/opt/gitlab/redis/redis.conf')
+        .with_content(/^save ""/)
     end
   end
 end