Drop redis namespace code (except for Rails cache) (#34665)

spec/lib/mastodon/redis_configuration_spec.rb

@@ -26,20 +26,6 @@ RSpec.describe Mastodon::RedisConfiguration do
     end
   end
 
-  shared_examples 'setting a namespace' do
-    context 'when setting the `REDIS_NAMESPACE` variable' do
-      around do |example|
-        ClimateControl.modify REDIS_NAMESPACE: 'testns' do
-          example.run
-        end
-      end
-
-      it 'uses the value for the namespace' do
-        expect(subject[:namespace]).to eq 'testns'
-      end
-    end
-  end
-
   shared_examples 'secondary configuration' do |prefix|
     context "when no `#{prefix}_REDIS_` environment variables are present" do
       it 'uses the url from the base config' do
@@ -208,7 +194,6 @@ RSpec.describe Mastodon::RedisConfiguration do
     end
 
     it_behaves_like 'setting a different driver'
-    it_behaves_like 'setting a namespace'
     it_behaves_like 'sentinel support'
   end
 
@@ -217,7 +202,6 @@ RSpec.describe Mastodon::RedisConfiguration do
 
     it_behaves_like 'secondary configuration', 'SIDEKIQ'
     it_behaves_like 'setting a different driver'
-    it_behaves_like 'setting a namespace'
     it_behaves_like 'sentinel support', 'SIDEKIQ'
   end
 
@@ -238,22 +222,8 @@ RSpec.describe Mastodon::RedisConfiguration do
       })
     end
 
-    context 'when `REDIS_NAMESPACE` is not set' do
-      it 'uses the `cache` namespace' do
-        expect(subject[:namespace]).to eq 'cache'
-      end
-    end
-
-    context 'when setting the `REDIS_NAMESPACE` variable' do
-      around do |example|
-        ClimateControl.modify REDIS_NAMESPACE: 'testns' do
-          example.run
-        end
-      end
-
-      it 'attaches the `_cache` postfix to the namespace' do
-        expect(subject[:namespace]).to eq 'testns_cache'
-      end
+    it 'uses the `cache` namespace' do
+      expect(subject[:namespace]).to eq 'cache'
     end
 
     it_behaves_like 'secondary configuration', 'CACHE'

spec/support/streaming_server_manager.rb

@@ -17,7 +17,7 @@ class StreamingServerManager
     @running_thread = Thread.new do
       Open3.popen2e(
         {
-          'REDIS_NAMESPACE' => REDIS_CONFIGURATION.base[:namespace],
+          'REDIS_DB' => (ENV.fetch('TEST_ENV_NUMBER', 0).to_i + 1).to_s,
           'DB_NAME' => "#{ENV.fetch('DB_NAME', 'mastodon')}_test#{ENV.fetch('TEST_ENV_NUMBER', '')}",
           'RAILS_ENV' => ENV.fetch('RAILS_ENV', 'test'),
           'NODE_ENV' => ENV.fetch('STREAMING_NODE_ENV', 'development'),