红帽全球峰会5.6. 关于 DNS 服务拒绝列表
Red Hat OpenStack Platform (RHOSP) DNS 服务（指定）有一个 denylist 功能，可让您防止用户创建带有与特定正则表达式匹配的区域。例如，您可以使用 denylist 来防止用户：
- 创建特定区域。
- 创建包含特定字符串的区域。
- 创建特定区的子区。
如果 example.com. 是拒绝列表中的成员，一个域或项目用户尝试创建如 foo.example.com. 或 example.com. 的区，则会遇到错误：
openstack zone create --email admin@example.com example.com. openstack zone create --email admin@example.com foo.example.com.
$ openstack zone create --email admin@example.com example.com.
Blacklisted zone name
$ openstack zone create --email admin@example.com foo.example.com.
Blacklisted zone name注意
满足 use_blacklisted_zone 基于角色的访问控制的用户可以创建具有 denylist 中名称的区域。默认情况下，具有此覆盖的唯一用户是 RHOSP 系统管理员。
您可以使用 OpenStack Client openstack zone blacklist 命令创建、列出、显示、修改和删除拒绝列表。
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