Created
January 15, 2012 14:02
-
-
Save taka328w/1615946 to your computer and use it in GitHub Desktop.
/etc/hosts生成
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
# coding: utf-8 | |
require 'rubygems' | |
require 'aws-sdk' | |
config = {:access_key_id => 'アクセスキー ID', | |
:secret_access_key => 'シークレットアクセスキー'} | |
AWS.config(config) | |
hosts = [] | |
hosts << "127.0.0.1\tlocalhost localhost.localdomain" | |
AWS::EC2.new.instances.each do |instance| | |
next unless instance.status == :running | |
tags = instance.tags.to_h | |
hosts << "#{instance.private_ip_address}\t#{tags["Name"]}" | |
end | |
# バックアップを取って、差分があれば差し替え | |
`cp -p /etc/hosts /etc/hosts.bak` | |
open("/etc/hosts.new", "w") {|f| f.write hosts.join("\n")+"\n"} | |
is_same = system("diff -q /etc/hosts.new /etc/hosts > /dev/null 2>/dev/null") | |
unless is_same | |
`cp -p /etc/hosts.new /etc/hosts` | |
end |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment