Ruby on rails 为什么Capistrano部署失败，用户“postgres”的身份验证失败

我已经在我的站点中设置了Capistrano部署，我正在尝试部署到一个临时服务器。该服务器是一台CentoOS 6服务器，带有nginx和passenger

一切运行正常，但在执行“cap暂存部署”时出现此错误：

rake aborted!
DEBUG [3489dd68]    PG::ConnectionBad: FATAL:  Ident authentication failed for user "postgres"

在my/var/lib/pgsql/data/pg_hba.conf中，我得到了以下设置：

# TYPE  DATABASE    USER        CIDR-ADDRESS          METHOD

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

然后在我的config/database.yml文件中，我得到了以下信息：

development:
  adapter: sqlite3
  database: db/development.sqlite3
  pool: 5
  timeout: 5000

staging:
  adapter: postgresql
  database: popuphub_staging
  username: postgres
  password: r00t2xtry
  host: localhost

production:
  adapter: postgresql
  database: popup_production
  username: forge
  password: 7PoXsewpEiR8xcTityaecZczUWxAag
  host: localhost

我查看了deploy.rb文件，一切正常

lock '3.1.0'
server "0.0.0.0"

set :application, "PopupHub"
set :scm, "git"
set :repo_url, "git@another-repo-url-here.git"
# set :scm_passphrase, ""

# set :user, "deploy"

# files we want symlinking to specific entries in shared.
set :linked_files, %w{config/database.yml}

# dirs we want symlinking to shared
set :linked_dirs, %w{bin log tmp/pids tmp/cache tmp/sockets vendor/bundle public/system}

SSHKit.config.command_map[:rake]  = "bundle exec rake"
SSHKit.config.command_map[:rails] = "bundle exec rails"

#default_environment["RAILS_ENV"] = 'current'

set :branch, ENV["REVISION"] || ENV["BRANCH_NAME"] || "master"


set :keep_releases, 20

namespace :deploy do
  desc 'Restart passenger without service interruption (keep requests in a queue while restarting)'
  task :restart do
    on roles(:app) do
      execute :touch, release_path.join('tmp/restart.txt')

      unless execute :curl, '-s -k --location localhost | grep "Pop" > /dev/null'
        exit 1
      end
    end
  end
  after :finishing, "deploy:cleanup"
  after :finishing, "deploy:sitemap:refresh"
end

after "deploy", "deploy:migrate"
after 'deploy:publishing', 'deploy:restart'

我猜这是根服务器中postgresql的一个更深层次的问题，但我正在努力解决这个问题

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我想我需要一点指导。

你找到解决办法了吗？