/********************************************************************

* Redmine 数据库连接错误

* 说明：

* OpenMediaVault上的Redmine出现连接错误，目前不知道是我自己不小心

* 把mysql的密码修改了，还是因为被攻击了，先记录一下。

*

* 2016-8-17 深圳 南山平山村 曾剑锋

*******************************************************************/一、参考文档：1. 完整过程解决 ERROR 1045 (28000): Access denied for user 'mysql'@'localhost' (usingpassword: NO)

http://blog.csdn.net/nel0511/article/details/13091163

二、错误现象：

root@workflow:/etc# ruby /usr/share/redmine/bin/rails server -p3000 webrick -e production &[1] 2828root@workflow:/etc# =>Booting WEBrick=> Rails 3.1.8 application starting in production on http://0.0.0.0:3000

=> Run `rails server -h` formore startup options=> Notice: server is listening on all interfaces (0.0.0.0). Consider using 127.0.0.1 (--binding option)=> Ctrl-C to shutdown server

Exiting/usr/lib/ruby/vendor_ruby/mysql2/client.rb:70:in `connect': Access denied for user'root'@'localhost'(using password: YES) (Mysql2::Error)

from /usr/lib/ruby/vendor_ruby/mysql2/client.rb:70:in `initialize' from /usr/lib/ruby/vendor_ruby/active_record/connection_adapters/mysql2_adapter.rb:18:in `new' from /usr/lib/ruby/vendor_ruby/active_record/connection_adapters/mysql2_adapter.rb:18:in `mysql2_connection' from /usr/lib/ruby/vendor_ruby/active_record/connection_adapters/abstract/connection_pool.rb:435:in `new_connection' from /usr/lib/ruby/vendor_ruby/active_record/connection_adapters/abstract/connection_pool.rb:445:in `checkout_new_connection' from /usr/lib/ruby/vendor_ruby/active_record/connection_adapters/abstract/connection_pool.rb:416:in `acquire_connection' from /usr/lib/ruby/vendor_ruby/active_record/connection_adapters/abstract/connection_pool.rb:351:in `block in checkout' from /usr/lib/ruby/1.1.0/monitor.rb:211:in `mon_synchronize' from /usr/lib/ruby/vendor_ruby/active_record/connection_adapters/abstract/connection_pool.rb:350:in `checkout' from /usr/lib/ruby/vendor_ruby/active_record/connection_adapters/abstract/connection_pool.rb:265:in `block in connection' from /usr/lib/ruby/1.1.0/monitor.rb:211:in `mon_synchronize' from /usr/lib/ruby/vendor_ruby/active_record/connection_adapters/abstract/connection_pool.rb:264:in `connection' from /usr/lib/ruby/vendor_ruby/active_record/connection_adapters/abstract/connection_pool.rb:541:in `retrieve_connection' from /usr/lib/ruby/vendor_ruby/active_record/connection_handling.rb:113:in `retrieve_connection' from /usr/lib/ruby/vendor_ruby/active_record/connection_handling.rb:87:in `connection' from /usr/lib/ruby/vendor_ruby/active_record/model_schema.rb:209:in `table_exists?' from /usr/lib/ruby/vendor_ruby/active_record/attribute_methods/primary_key.rb:99:in `get_primary_key' from /usr/lib/ruby/vendor_ruby/active_record/attribute_methods/primary_key.rb:84:in `reset_primary_key' from /usr/lib/ruby/vendor_ruby/active_record/attribute_methods/primary_key.rb:72:in `primary_key' from /usr/lib/ruby/vendor_ruby/active_record/mass_assignment_security/attribute_assignment.rb:15:in `attributes_protected_by_default' from /usr/lib/ruby/vendor_ruby/active_model/mass_assignment_security.rb:332:in `block in protected_attributes_configs' from /usr/lib/ruby/vendor_ruby/active_model/mass_assignment_security.rb:217:in `yield' from /usr/lib/ruby/vendor_ruby/active_model/mass_assignment_security.rb:217:in `protected_attributes' from /usr/lib/ruby/vendor_ruby/active_model/mass_assignment_security.rb:123:in `block in attr_protected' from /usr/lib/ruby/vendor_ruby/active_model/mass_assignment_security.rb:122:in `each' from /usr/lib/ruby/vendor_ruby/active_model/mass_assignment_security.rb:122:in `attr_protected' from /usr/share/redmine/app/models/custom_field.rb:32:in `' from /usr/share/redmine/app/models/custom_field.rb:18:in `' from /usr/lib/ruby/vendor_ruby/active_support/dependencies.rb:247:in `require' from /usr/lib/ruby/vendor_ruby/active_support/dependencies.rb:247:in `block in require' from /usr/lib/ruby/vendor_ruby/active_support/dependencies.rb:232:in `load_dependency' from /usr/lib/ruby/vendor_ruby/active_support/dependencies.rb:247:in `require' from /usr/lib/ruby/vendor_ruby/active_support/dependencies.rb:348:in `require_or_load' from /usr/lib/ruby/vendor_ruby/active_support/dependencies.rb:480:in `load_missing_constant' from /usr/lib/ruby/vendor_ruby/active_support/dependencies.rb:180:in `const_missing' from /usr/lib/ruby/vendor_ruby/active_support/dependencies.rb:512:in `load_missing_constant' from /usr/lib/ruby/vendor_ruby/active_support/dependencies.rb:180:in `const_missing' from /usr/lib/ruby/vendor_ruby/active_support/dependencies.rb:512:in `load_missing_constant' from /usr/lib/ruby/vendor_ruby/active_support/dependencies.rb:180:in `const_missing' from /usr/lib/ruby/vendor_ruby/active_support/dependencies.rb:512:in `load_missing_constant' from /usr/lib/ruby/vendor_ruby/active_support/dependencies.rb:180:in `const_missing' from /usr/share/redmine/lib/redmine/field_format.rb:80:in `field_attributes' from /usr/share/redmine/lib/redmine/field_format.rb:83:in `

三、解决办法：

修改数据库root密码。