Question

我想要一个快速而又脏的停止和启动实例，所以我写了下面的内容，这完全得到来自describe_instances的bizzare答案，并显示我的实例在它实际上已停止并且不会停止或启动任何内容时运行。

任何人都有指向我明显错误的指针吗？

#!/bin/ruby

require 'rubygems'
require 'bundler/setup'
require 'aws-sdk'
require 'uuid'
require 'pp'


class InstanceManager
  def listInstances()
  ec2 = Aws::EC2::Client.new(region:  "eu-west-1")
  resp = ec2.describe_instances()
    resp.reservations.each do |res|
     res.instances.each do |inst|
      iid = inst[:instance_id]
      istate = inst[:state].name
      puts "#{iid} #{istate}"
     end
    end
  end
  def stop(iid)
    ec2 = Aws::EC2::Client.new(region:  "eu-west-1")
    inst = ec2.describe_instances(instance_ids: [iid]).reservations[0].instances[0]
    if ( inst[:state].name == "running" )
      puts "stopping #{iid}"
      res=ec2.stop_instances(dry_run: false, instance_ids: [iid],force: true)
      pp res
    else
      puts "#{iid} already stopped"
    end
    pp inst
  end
  def start(iid)
    ec2 = Aws::EC2::Client.new(region:  "eu-west-1")
    inst = ec2.describe_instances(instance_ids: [iid]).reservations[0].instances[0]
    if ( inst[:state].name == "stopped" )
      pp inst
      puts "starting #{iid}"
      res=ec2.start_instances(dry_run: false, instance_ids: [iid],force: true)
      pp res
    else
      puts "#{iid} already started"
    end
    pp inst
  end
end

if __FILE__ ==$0
  z = InstanceManager.new
  z.listInstances()
#  z.stop("i-e122b106")
  z.start("i-e122b106")
end

Answer 1

我怀疑您遇到了与EC2 API最终的一致性问题。这在使用Amazon EC2时非常常见。当您发出命令（例如#stop_instance）时，#describe_instances呼叫将继续返回状态，例如运行一段时间，直到状态发生变化。这可能需要几分钟。

aws describe_instances返回不正确的值

1 个答案: