Question

运行db：create：

时出现此错误

FATAL:  Peer authentication failed for user "wandrr"
/home/jack/.rvm/gems/ruby-1.9.3-p327/gems/activerecord-3.2.9/lib/active_record/connection_adapters/postgresql_adapter.rb:1208:in `initialize'
/home/jack/.rvm/gems/ruby-1.9.3-p327/gems/activerecord-3.2.9/lib/active_record/connection_adapters/postgresql_adapter.rb:1208:in `new'
/home/jack/.rvm/gems/ruby-1.9.3-p327/gems/activerecord-3.2.9/lib/active_record/connection_adapters/postgresql_adapter.rb:1208:in `connect'
/home/jack/.rvm/gems/ruby-1.9.3-p327/gems/activerecord-3.2.9/lib/active_record/connection_adapters/postgresql_adapter.rb:326:in `initialize'
/home/jack/.rvm/gems/ruby-1.9.3-p327/gems/activerecord-3.2.9/lib/active_record/connection_adapters/postgresql_adapter.rb:28:in `new'
/home/jack/.rvm/gems/ruby-1.9.3-p327/gems/activerecord-3.2.9/lib/active_record/connection_adapters/postgresql_adapter.rb:28:in `postgresql_connection'
/home/jack/.rvm/gems/ruby-1.9.3-p327/gems/activerecord-3.2.9/lib/active_record/connection_adapters/abstract/connection_pool.rb:315:in `new_connection'
/home/jack/.rvm/gems/ruby-1.9.3-p327/gems/activerecord-3.2.9/lib/active_record/connection_adapters/abstract/connection_pool.rb:325:in `checkout_new_connection'
/home/jack/.rvm/gems/ruby-1.9.3-p327/gems/activerecord-3.2.9/lib/active_record/connection_adapters/abstract/connection_pool.rb:247:in `block (2 levels) in checkout'
/home/jack/.rvm/gems/ruby-1.9.3-p327/gems/activerecord-3.2.9/lib/active_record/connection_adapters/abstract/connection_pool.rb:242:in `loop'
/home/jack/.rvm/gems/ruby-1.9.3-p327/gems/activerecord-3.2.9/lib/active_record/connection_adapters/abstract/connection_pool.rb:242:in `block in checkout'
/home/jack/.rvm/rubies/ruby-1.9.3-p327/lib/ruby/1.9.1/monitor.rb:211:in `mon_synchronize'
/home/jack/.rvm/gems/ruby-1.9.3-p327/gems/activerecord-3.2.9/lib/active_record/connection_adapters/abstract/connection_pool.rb:239:in `checkout'
/home/jack/.rvm/gems/ruby-1.9.3-p327/gems/activerecord-3.2.9/lib/active_record/connection_adapters/abstract/connection_pool.rb:102:in `block in connection'
/home/jack/.rvm/rubies/ruby-1.9.3-p327/lib/ruby/1.9.1/monitor.rb:211:in `mon_synchronize'
/home/jack/.rvm/gems/ruby-1.9.3-p327/gems/activerecord-3.2.9/lib/active_record/connection_adapters/abstract/connection_pool.rb:101:in `connection'
/home/jack/.rvm/gems/ruby-1.9.3-p327/gems/activerecord-3.2.9/lib/active_record/connection_adapters/abstract/connection_pool.rb:410:in `retrieve_connection'
....Edit out 40 more of these warnings...
/home/jack/.rvm/gems/ruby-1.9.3-p327/bin/ruby_noexec_wrapper:14:in `eval'
/home/jack/.rvm/gems/ruby-1.9.3-p327/bin/ruby_noexec_wrapper:14:in `<main>'
Couldn't create database for {"adapter"=>"postgresql", "encoding"=>"unicode", "database"=>"wandrr_test", "pool"=>5, "username"=>"wandrr", "password"=>nil}

所以我发现我必须编辑pg_hba.conf问题是......它无法打开。它一直告诉我，我没有权限使用此文件。那么我如何获得许可？我正在运行ubuntu 12.10和rails 1.9.3以及postgres 9.1

Answer 1

首先记下系统上pg_hba.conf的位置。如果您不知道但可以连接，请使用PgAdmin-III或psql连接到Pg并运行：

SHOW hba_file;

获取pg_hba.conf的位置。它的位置非常标准;在Ubuntu上，它将在/etc/postgresql/[major.minor]/main/pg_hba.conf，例如/etc/postgresql/9.1/main/pg_hba.conf。在大多数其他发行版中，它将直接位于/var/lib/pgsql/或/var/lib/postgresql下，或者直接在版本化目录中。

要编辑此文件，您必须先指定完整路径或将目录更改为其位置。说：

sudo vi /etc/postgresql/9.1/main/pg_hba.conf

如果您更喜欢更友好的文本编辑器：

sudo nano /etc/postgresql/9.1/main/pg_hba.conf

或用首选编辑器替换“nano”，例如gedit。

保存更改后，请记住重新加载PostgreSQL服务以使其生效。在Ubuntu上你想要：

pg_ctlcluster 9.1 main reload

Answer 2

以下Crag的建议运作良好。

对于他的最后一步，你必须sudo进入数据库超级用户才能重新加载PostgreSQL服务：

sudo -u postres pg_ctlcluster 9.1 main reload

这些步骤也适用于Debian Sid系统。

Answer 3

要编辑pg_hba.conf，您可以尝试以postgres用户的身份进行编辑：

切换到postgres用户

sudo su postgres
运行psql
SHOW hba_file;作为psql中的查询以获取位置
nano *the file location*（不是 sudo nano，因为它将尝试以root用户身份进行编辑操作）

无法访问postgres文件pg_hba.conf

3 个答案: