ruby-on-rails - PostgreSQL 服务器无法在 Cloud9 中启动

我想在 Cloud9 中为我的 Rails 应用设置 postgresql。

修改文件后出现如下错误

sudo service postgresql start
 * Starting PostgreSQL 9.3 database server
 * The PostgreSQL server failed to start. Please check the log output:
2016-04-09 23:49:54 UTC LOG:  invalid connection type "PostgreSQL"
2016-04-09 23:49:54 UTC CONTEXT:  line 1 of configuration file "/etc/postgresql/9.3/main/pg_hba.conf"
2016-04-09 23:49:54 UTC FATAL:  could not load pg_hba.conf
   ...fail!

数据库.yml

default: &default
  adapter: postgresql
  encoding: unicode
  pool: 5
  host:     localhost
  username: ubuntu
  password: password

development:
  <<: *default
  database: app_development

test:
  <<: *default
  database: app_test

production:
  <<: *default
  database: app_production

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

PostgreSQL Client Authentication Configuration File
...

# Database administrative login by Unix domain socket
local   localhost            postgres                                peer

# TYPE  DATABASE        USER            ADDRESS                 METHOD

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

如果你能告诉我如何避免这个错误，我将不胜感激。

最佳答案

这可能是由于配置文件中的无效条目所致。尝试使用

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