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8.10. 防止 Overcloud 被删除
为了避免无意中使用
heat stack-delete overcloud 命令造成 Overcloud 被删除，Heat 包括了一组策略来防止这个问题的出现。打开 /etc/heat/policy.json 并找到以下参数：
"stacks:delete": "rule:deny_stack_user"
把它改为：
"stacks:delete": "rule:deny_everybody"
保存这个文件。
这会避免使用
heat 客户端删除 Overcloud。为了可以删除 Overcloud，把策略恢复为原来的值。
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