Cloud9中的postgresql错误“无法连接到服务器：连接被拒绝”

Question

我想在Cloud9中为我的rails应用程序设置postgresql。

当我尝试bundle exec rake db:create时出现以下错误。

could not connect to server: Connection refused
        Is the server running on host "localhost" (::1) and accepting
        TCP/IP connections on port 5432?
could not connect to server: Connection refused
        Is the server running on host "localhost" (127.0.0.1) and accepting
        TCP/IP connections on port 5432?
...

数据库

default: &default
  adapter: postgresql
  encoding: unicode
  pool: 5
  username: <%= ENV['USERNAME'] %>
  password: <%= ENV['PASSWORD'] %>
  host:     localhost

development:
  <<: *default
  database: app_development

test:
  <<: *default
  database: app_test

production:
  <<: *default
  database: app_production

宝石文件

gem 'pg', '~> 0.18.2'

/etc/postgresql/9.3/main/ pg_hba.conf

# Database administrative login by Unix domain socket
local   localhost            ubuntu                                md5

# TYPE  DATABASE        USER            ADDRESS                 METHOD

# "local" is for Unix domain socket connections only
local   all             ubuntu                                    md5
# IPv4 local connections:
host    all             all             127.0.0.1/32            md5
# IPv6 local connections:
host    all             all             ::1/128                 md5

尽管我在stackoverflow中发现了类似的问题，但它们对我不起作用。 如果您能建议我如何避免此错误，将不胜感激。

Answer 1

配置postgresql.conf文件。 您必须将listen_addresses更新为全部，并确保通过删除＃标记取消注释该行。 因此，您的listen_addresses应该看起来像这个listen_addresses = '*'