现在我对Ubuntu和postgres有点不放心,但这是我目前所做的。
在Ubuntu中,我创建了一个名为postgres的用户,密码为postgress:
$ sudo adduser postgres
Enter new UNIX password: (I typed ' postgres ' here)
Retype new UNIX password: (I typed ' postgres ' here)
然后,我以postgres用户身份登录:
$ su postgres
Password: (I typed ' postgres ' here)
作为postgres,我启动了postgres服务器:
postgres@ubuntu:/$ /usr/lib/postgresql/9.1/bin/postgres -D /usr/local/var/postgres
LOG: database system was shut down at 2013-11-05 17:04:32 PST
LOG: database system is ready to accept connections
LOG: autovacuum launcher started
接下来,我创建了一个使用postgres数据库的rails应用程序设置:
rails new myapp --database=postgresql
我附加了我的数据库配置YAML文件:
# PostgreSQL. Versions 8.2 and up are supported.
#
# Install the pg driver:
# gem install pg
# On OS X with Homebrew:
# gem install pg -- --with-pg-config=/usr/local/bin/pg_config
# On OS X with MacPorts:
# gem install pg -- --with-pg-config=/opt/local/lib/postgresql84/bin/pg_config
# On Windows:
# gem install pg
# Choose the win32 build.
# Install PostgreSQL and put its /bin directory on your path.
#
# Configure Using Gemfile
# gem 'pg'
#
development:
adapter: postgresql
encoding: unicode
database: postgresql_development
pool: 5
username: postgres
password: postgres
# Connect on a TCP socket. Omitted by default since the client uses a
# domain socket that doesn't need configuration. Windows does not have
# domain sockets, so uncomment these lines.
#host: localhost
# The TCP port the server listens on. Defaults to 5432.
# If your server runs on a different port number, change accordingly.
#port: 5432
# Schema search path. The server defaults to $user,public
#schema_search_path: myapp,sharedapp,public
# Minimum log levels, in increasing order:
# debug5, debug4, debug3, debug2, debug1,
# log, notice, warning, error, fatal, and panic
# Defaults to warning.
#min_messages: notice
# 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: postgresql
encoding: unicode
database: postgresql_test
pool: 5
username: postgres
password: postgres
production:
adapter: postgresql
encoding: unicode
database: postgresql_production
pool: 5
username: postgres
password: postgres
最后,我运行
rake db:setup
不知道会发生什么,真的。正如前面提到的,我对这个话题有点不太了解。我的应用程序的db目录中会出现许多小的db.postgres文件?
无论如何,我得到了一个巨大的错误消息,但它的要点是:
Couldn't create database for {"adapter"=>"postgresql", "encoding"=>"unicode", "database"=>"postgresql_development", "pool"=>5, "username"=>"postgresql", "password"=>nil}
FATAL: role "postgresql" does not exist
好消息是数据库服务器输出如下:
FATAL: role "postgresql" does not exist
FATAL: role "postgresql" does not exist
FATAL: role "postgresql" does not exist
这意味着在我的系统上一切都是正确的,并且rake任务正在尝试创建我的测试、生产和部署数据库。
坏消息是,我并不真正理解错误消息:
FATAL: role "postgresql" does not exist
嗯,我很确定在我的YAML中指定的用户名是postgres,而不是postgresql。
couldn't create database for {"adapter"=>"postgresql", "encoding"=>"unicode", "database"=>"postgresql_development", "pool"=>5, "username"=>"postgresql", "password"=>nil}
为什么我的用户名postgresql和密码都是空的?这根本不是我的YAML中的东西!
如果有人能帮我走出这最后一步,我将非常感激:)
最后一个问题,非sqlite3数据库到底是如何工作的,它们位于系统的什么位置。当我开始使用Rails并看到db目录中的小db.sqlite3时,我可以完全理解这一点。
然而,对于beefer数据库,数据库现在存储在称为集群的东西中,对吗?
现在,对于我创建的每个postgres rails应用程序,它们的所有数据库都会存储在集群中吗?
如果我购买一个Ubuntu VPS并在上面安装postgres,这会是相同的吗?位于/usr/local/var/postgres
的群集包含我所有应用程序的所有数据库?
发布于 2013-11-10 10:49:44
你忽略了一些细节,比如你所在的操作系统和版本,你是如何安装PostgreSQL的,这使得这个问题更难回答。
你提到了Ubuntu,所以我猜你从Ubuntu到apt安装了PostgreSQL包。
如果是这样的话,PostgreSQL用户帐户已经存在,并且被配置为可以通过pg_hba.conf中的PostgreSQL套接字的对等身份验证进行访问。您可以通过以postgres unix用户身份运行命令来访问它,例如:
sudo -u postgres创建用户the_name
rake db:create:all
完成此操作并重新启动我的Rails服务器后,我回到了server_url,我很高兴地使用了Rails!
https://stackoverflow.com/questions/19802883
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