OpenStack: Never used it personally (but considering it for a future project), development started by the NASA, now deployed on different high-profile providers, such as RackSpace
You can use our free Drupal AMIs in Amazon EC2 and with Eucalyptus. If you'd prefer to, you can download VMWare images from the same page (they are also free).
Eucalyptus和OpenStack都是开源工具，你可以用它们建立私有云，但需要时间和精力。如果您不限于使用开源，请尝试 Nimbula Director 2.0，这是一款用于建立私有云的企业产品，并且可以免费使用最多 40 个核心。请随时告诉我您的选择或您是否找到了更好的选择。
Eucalyptus and OpenStack are open source tools, you could set up private cloud with them, but will need time and effort. If you are not limited to use open source, try Nimbula Director 2.0 , this is a enterprise product to set up a private cloud that and is free to use up to 40 cores. Keep me posted on what you chose or if you found a better one.
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您看过以下软件吗？
Have you taken a look at the following pieces of software?
您可以在 Amazon EC2 和 Eucalyptus 中使用我们免费的 Drupal AMI。如果您愿意，可以从同一页面下载 VMWare 映像（它们也是免费的）。
You can use our free Drupal AMIs in Amazon EC2 and with Eucalyptus. If you'd prefer to, you can download VMWare images from the same page (they are also free).
Eucalyptus和OpenStack都是开源工具，你可以用它们建立私有云，但需要时间和精力。如果您不限于使用开源，请尝试 Nimbula Director 2.0，这是一款用于建立私有云的企业产品，并且可以免费使用最多 40 个核心。请随时告诉我您的选择或您是否找到了更好的选择。
Eucalyptus and OpenStack are open source tools, you could set up private cloud with them, but will need time and effort. If you are not limited to use open source, try Nimbula Director 2.0 , this is a enterprise product to set up a private cloud that and is free to use up to 40 cores. Keep me posted on what you chose or if you found a better one.