Capture Cockroach DB config in sentry-rails ActiveRecordSubscriber

Author: natikgadzhi

CHANGELOG.md

@@ -27,6 +27,7 @@
 - Respect custom `Delayed::Job.max_attempts` if it's defined [#2176](https://github.com/getsentry/sentry-ruby/pull/2176)
 - Fixed a bug where `Net::HTTP` instrumentation won't work for some IPv6 addresses [#2180](https://github.com/getsentry/sentry-ruby/pull/2180)
 - Allow non-string error message to be reported to sentry ([#2137](https://github.com/getsentry/sentry-ruby/pull/2137))
+- `sentry-rails` will now capture Cockroach DB adapter config into spans data [#2182](https://github.com/getsentry/sentry-ruby/pull/2182)
 
 ## 5.13.0
 

sentry-rails/lib/sentry/rails/tracing/active_record_subscriber.rb

@@ -26,11 +26,15 @@ def self.subscribe!
               end
 
               next unless connection
-
+              
               db_config = if connection.pool.respond_to?(:db_config)
                             connection.pool.db_config.configuration_hash
                           elsif connection.pool.respond_to?(:spec)
                             connection.pool.spec.config
+                          # CockroachDB pool shows up as NullPool, but we can grab
+                          # it's configuration from the instance variable.
+                          elsif connection.instance_variable_defined?(:@config)
+                            connection.instance_variable_get(:@config)
                           end
 
               next unless db_config