ruby - mongo - ruby 连接问题

Question

我已经安装了 mongo 和 bson_ext现在我创建了一个 .rb 文件，其内容如下::

require 'rubygems'
require 'mongo'

db = Mongo::Connection.new.db("mydb")
db = Mongo::Connection.new("localhost").db("mydb")
db = Mongo::Connection.new("localhost", 27017).db("mydb")

但是我在运行代码时遇到以下错误

yuzaki@ubuntu:~$ ruby firstruby.rb
/home/ryuzaki/.rvm/gems/ruby-1.9.2-p136/gems/mongo-1.2.0/lib/mongo/connection.rb:451:in `connect': Failed to connect to a master node at localhost:27017 (Mongo::ConnectionFailure)
    from /home/ryuzaki/.rvm/gems/ruby-1.9.2-p136/gems/mongo-1.2.0/lib/mongo/connection.rb:554:in `setup'
    from /home/ryuzaki/.rvm/gems/ruby-1.9.2-p136/gems/mongo-1.2.0/lib/mongo/connection.rb:98:in `initialize'
    from firstruby.rb:4:in `new'
    from firstruby.rb:4:in `<main>'

请帮忙!

Answer 1

这种情况已经发生过好几次了，下面是适合我的解决方案:

sudo rm /var/lib/mongodb/mongod.lock
sudo -u mongodb mongod -f /etc/mongodb.conf --repair
sudo start mongodb
sudo status mongodb