Ruby Mysql無法連接到localhost（10061）

Question

我從Lynda跟蹤ruby on rails課程，我在使用Windows命令行連接數據庫時遇到問題。

我可以使用“mysql -u username -p”連接到數據庫，然后輸入密碼。 我可以創建數據庫而且沒有問題。

現在執行時：

rake db:schema:dump

在我的應用程序文件夾“simple_cms”中，我得到以下內容：

rake aborted!
Can't connect to MySQL server on 'localhost' (10061)

Tasks: TOP => db:schema:dump
(See full trace by running task with --trace)

運行跟蹤給出：

C:\Users\ASUS\Desktop\simple_cms>rake db:schema:dump --trace
** Invoke db:schema:dump (first_time)
** Invoke environment (first_time)
** Execute environment
** Invoke db:load_config (first_time)
** Execute db:load_config
** Execute db:schema:dump
rake aborted!
Can't connect to MySQL server on 'localhost' (10061)
C:/Ruby192/lib/ruby/gems/1.9.1/gems/mysql2-0.3.11-x86-mingw32/lib/mysql2/client.
rb:44:in `connect'
C:/Ruby192/lib/ruby/gems/1.9.1/gems/mysql2-0.3.11-x86-mingw32/lib/mysql2/client.
rb:44:in `initialize'
C:/Ruby192/lib/ruby/gems/1.9.1/gems/activerecord-3.2.10/lib/active_record/connec
tion_adapters/mysql2_adapter.rb:16:in `new'
C:/Ruby192/lib/ruby/gems/1.9.1/gems/activerecord-3.2.10/lib/active_record/connec
tion_adapters/mysql2_adapter.rb:16:in `mysql2_connection'
C:/Ruby192/lib/ruby/gems/1.9.1/gems/activerecord-3.2.10/lib/active_record/connec
tion_adapters/abstract/connection_pool.rb:315:in `new_connection'
C:/Ruby192/lib/ruby/gems/1.9.1/gems/activerecord-3.2.10/lib/active_record/connec
tion_adapters/abstract/connection_pool.rb:325:in `checkout_new_connection'
C:/Ruby192/lib/ruby/gems/1.9.1/gems/activerecord-3.2.10/lib/active_record/connec
tion_adapters/abstract/connection_pool.rb:247:in `block (2 levels) in checkout'
C:/Ruby192/lib/ruby/gems/1.9.1/gems/activerecord-3.2.10/lib/active_record/connec
tion_adapters/abstract/connection_pool.rb:242:in `loop'
C:/Ruby192/lib/ruby/gems/1.9.1/gems/activerecord-3.2.10/lib/active_record/connec
tion_adapters/abstract/connection_pool.rb:242:in `block in checkout'
C:/Ruby192/lib/ruby/1.9.1/monitor.rb:201:in `mon_synchronize'
C:/Ruby192/lib/ruby/gems/1.9.1/gems/activerecord-3.2.10/lib/active_record/connec
tion_adapters/abstract/connection_pool.rb:239:in `checkout'
C:/Ruby192/lib/ruby/gems/1.9.1/gems/activerecord-3.2.10/lib/active_record/connec
tion_adapters/abstract/connection_pool.rb:102:in `block in connection'
C:/Ruby192/lib/ruby/1.9.1/monitor.rb:201:in `mon_synchronize'
C:/Ruby192/lib/ruby/gems/1.9.1/gems/activerecord-3.2.10/lib/active_record/connec
tion_adapters/abstract/connection_pool.rb:101:in `connection'
C:/Ruby192/lib/ruby/gems/1.9.1/gems/activerecord-3.2.10/lib/active_record/connec
tion_adapters/abstract/connection_pool.rb:410:in `retrieve_connection'
C:/Ruby192/lib/ruby/gems/1.9.1/gems/activerecord-3.2.10/lib/active_record/connec
tion_adapters/abstract/connection_specification.rb:171:in `retrieve_connection'
C:/Ruby192/lib/ruby/gems/1.9.1/gems/activerecord-3.2.10/lib/active_record/connec
tion_adapters/abstract/connection_specification.rb:145:in `connection'
C:/Ruby192/lib/ruby/gems/1.9.1/gems/activerecord-3.2.10/lib/active_record/railti
es/databases.rake:379:in `block (4 levels) in <top (required)>'
C:/Ruby192/lib/ruby/gems/1.9.1/gems/activerecord-3.2.10/lib/active_record/railti
es/databases.rake:378:in `open'
C:/Ruby192/lib/ruby/gems/1.9.1/gems/activerecord-3.2.10/lib/active_record/railti
es/databases.rake:378:in `block (3 levels) in <top (required)>'
C:/Ruby192/lib/ruby/gems/1.9.1/gems/rake-10.0.3/lib/rake/task.rb:228:in `call'
C:/Ruby192/lib/ruby/gems/1.9.1/gems/rake-10.0.3/lib/rake/task.rb:228:in `block i
n execute'
C:/Ruby192/lib/ruby/gems/1.9.1/gems/rake-10.0.3/lib/rake/task.rb:223:in `each'
C:/Ruby192/lib/ruby/gems/1.9.1/gems/rake-10.0.3/lib/rake/task.rb:223:in `execute
'
C:/Ruby192/lib/ruby/gems/1.9.1/gems/rake-10.0.3/lib/rake/task.rb:166:in `block i
n invoke_with_call_chain'
C:/Ruby192/lib/ruby/1.9.1/monitor.rb:201:in `mon_synchronize'
C:/Ruby192/lib/ruby/gems/1.9.1/gems/rake-10.0.3/lib/rake/task.rb:159:in `invoke_
with_call_chain'
C:/Ruby192/lib/ruby/gems/1.9.1/gems/rake-10.0.3/lib/rake/task.rb:152:in `invoke'

C:/Ruby192/lib/ruby/gems/1.9.1/gems/rake-10.0.3/lib/rake/application.rb:143:in `
invoke_task'
C:/Ruby192/lib/ruby/gems/1.9.1/gems/rake-10.0.3/lib/rake/application.rb:101:in `
block (2 levels) in top_level'
C:/Ruby192/lib/ruby/gems/1.9.1/gems/rake-10.0.3/lib/rake/application.rb:101:in `
each'
C:/Ruby192/lib/ruby/gems/1.9.1/gems/rake-10.0.3/lib/rake/application.rb:101:in `
block in top_level'
C:/Ruby192/lib/ruby/gems/1.9.1/gems/rake-10.0.3/lib/rake/application.rb:110:in `
run_with_threads'
C:/Ruby192/lib/ruby/gems/1.9.1/gems/rake-10.0.3/lib/rake/application.rb:95:in `t
op_level'
C:/Ruby192/lib/ruby/gems/1.9.1/gems/rake-10.0.3/lib/rake/application.rb:73:in `b
lock in run'
C:/Ruby192/lib/ruby/gems/1.9.1/gems/rake-10.0.3/lib/rake/application.rb:160:in `
standard_exception_handling'
C:/Ruby192/lib/ruby/gems/1.9.1/gems/rake-10.0.3/lib/rake/application.rb:70:in `r
un'
C:/Ruby192/lib/ruby/gems/1.9.1/gems/rake-10.0.3/bin/rake:33:in `<top (required)>
'
C:/Ruby192/bin/rake:19:in `load'
C:/Ruby192/bin/rake:19:in `<main>'
Tasks: TOP => db:schema:dump

C:\Users\ASUS\Desktop\simple_cms>

現在在我的database.yml文件中，我已經將用戶和密碼放入並記住將integerpassword放在“”中，冒號和密碼之間的空格如下：

# MySQL.  Versions 4.1 and 5.0 are recommended.
# 
# Install the MYSQL driver
#   gem install mysql2
#
# Ensure the MySQL gem is defined in your Gemfile
#   gem 'mysql2'
#
# And be sure to use new-style password hashing:
#   http://dev.mysql.com/doc/refman/5.0/en/old-client.html
development:
  adapter: mysql2
  encoding: utf8
  reconnect: false
  database: simple_cms_development
  pool: 5
  username: simplelogin
  password: "1234"
  host: localhost

# Warning: The database defined as "test" will be erased and
# re-generated from your development database when you run "rake".
# Do not set this db to the same as development or production.
test:
  adapter: mysql2
  encoding: utf8
  reconnect: false
  database: simple_cms_test
  pool: 5
  username: root
  password:
  host: localhost

production:
  adapter: mysql2
  encoding: utf8
  reconnect: false
  database: simple_cms_production
  pool: 5
  username: root
  password:
  host: localhost

我甚至嘗試用這里描述的ip切換“localhost”（同樣的問題）： Rails開發 - 無法連接到'localhost'上的MySQL服務器（10061）

但是當我這樣做時，我從命令行得到任何消息。

那為什么我不能連接到數據庫？ 非常感謝任何幫助！ 謝謝！ 試圖學習ruby和整個安裝過程已經耗費了大量的時間......

Answer 1

使用mysql命令和使用連接器的問題是mysql可以根據它的配置方式使用不同的默認參數，這使得很難知道發生了什么。

您應該查找名為my.cnf的文件（如果您在Windows上，則查找my.ini）。 它可以指定不同的端口或主機。 你很幸運能夠通過mysql連接到數據庫，因為你可以看到你實際連接的位置。

看看你的港口：

mysql> show variables like 'port';
+---------------+-------+
| Variable_name | Value |
+---------------+-------+
| port          | 3306  |
+---------------+-------+
1 row in set (0.00 sec)

mysql> show variables like 'socket';
+---------------+-----------------+
| Variable_name | Value           |
+---------------+-----------------+
| socket        | /tmp/mysql.sock |
+---------------+-----------------+
1 row in set (0.00 sec)

mysql> show variables like 'hostname';
+---------------+-------------+
| Variable_name | Value       |
+---------------+-------------+
| hostname      | myhostname  |
+---------------+-------------+
1 row in set (0.00 sec)

查看這些值是否與database.yml文件匹配。

獲得這些值后，您可以嘗試在該端口上進行telnet。 如果在該端口上沒有任何內容，您將獲得以下內容：

$ telnet localhost 11111
Trying ::1...
telnet: connect to address ::1: Connection refused
Trying 127.0.0.1...
telnet: connect to address 127.0.0.1: Connection refused
Trying fe80::1...
telnet: connect to address fe80::1: Connection refused
telnet: Unable to connect to remote host

但如果有連接，你會看到一些寫有“mysql”的垃圾：

$ telnet localhost 3306
Trying ::1...
telnet: connect to address ::1: Connection refused
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
J
5.5.28JzKEXl7?5e|bUcq/5\Q^mysql_native_passwordConnection closed by foreign host.

我在Unix上工作，所以你的輸出可能看起來不一樣。

Answer 2

我在Lynda課程中。

development:
  adapter: mysql2
  encoding: utf8
  reconnect: false
  database: simple_cms_development
  pool: 5
  username: root
  password:
  host: 127.0.0.1
  port: 3306
  socket: C:/xampp/mysql/mysql.sock

我在Windows 8上使用mysql和XAMPP包。

我已經嘗試了一切，真正修復它的是從localhost到127.0.0.1的更改

Answer 3

我在這個問題上工作了幾天，幾乎嘗試了互聯網上的所有解決方案。 最后，我可以通過添加port：3306並使用'rails server'命令重新啟動WEBrick服務器來解決該錯誤。

謝謝。

Answer 4

我在Ruby和命令行中看到了這個可怕的東西！

Can't connect to MySQL server on 'localhost' (10061)

如果上面的解決方案不起作用，我懷疑它可能是一個與缺乏MySQL服務運行相關的問題。 除非你解決了MySQL的bug，否則Rails無法訪問MySQL。

診斷

在嘗試下面的解決方案之前，轉到命令行並嘗試再次從bin文件夾訪問MySQL：mysql -u username -p

如果你得到這樣的東西：

ERROR 2003 (HY000): Can't connect to MySQL server on 'localhost' (10061)

然后嘗試這個：

1. 以管理員身份運行cmd（如果不能，則必須咨詢您的IT代表）
2. 轉到MySQL中的bin文件夾並使用以下命令安裝MySQL服務：
mysqld --install

您可以收到以下兩條消息中的任何一條：

該服務已經存在！

要么

該服務已成功安裝

不要關閉cmd！

3. 搜索“服務”
4. 打開“服務”后，選擇MySQL並單擊“開始”。
5. 從命令行嘗試再次訪問mysql作為未識別的用戶，root或simple_cms。 mysql -u simplelogin -p
如果您成功，請嘗試再次運行rails