OpenStack Folsom中有一个BUG，那就是Fixed_Ips的配额问题
查阅官方文档得出，OpenStack的的默认quota配额如下：
Table 3.1. Description of nova.conf file configuration options for quotas Configuration option=Default value(Type) Descriptionquota_cores=20
(IntOpt) number of instance cores allowed per project (tenant)
quota_floating_ips=10
(IntOpt) number of floating ips allowed per project (tenant)
quota_gigabytes=1000
(IntOpt) number of volume gigabytes allowed per project (tenant)
quota_injected_file_content_bytes=10240
(IntOpt) number of bytes allowed per injected file
quota_injected_file_path_bytes=255
(IntOpt) number of bytes allowed per injected file path
quota_injected_files=5
(IntOpt) number of injected files allowed
quota_instances=10
(IntOpt) number of instances allowed per project (tenant)
quota_key_pairs=100
(IntOpt) number of key pairs allowed per user
quota_metadata_items=128
(IntOpt) number of metadata items allowed per instance
quota_ram=51200
(IntOpt) megabytes of instance ram allowed per project (tenant)
quota_security_group_rules=20
(IntOpt) number of security rules per security group
quota_security_groups=10
(IntOpt) number of security groups per project (tenant)
quota_volumes=10
(IntOpt) number of volumes allowed per project (tenant)
其中并没有指出Fixed_Ips的参数和配置，而使用管理员在Dashboard控制台中查看默认默认Quota的时候，显示如下图：
在控制台的Project中可Modify Quotas的功能中，也没有发现可修改的Fix_Ips项，如下图：
再查阅官方Nova配置文档，表明Quotas默认值可以通过修改nova配置文件/etc/nova/nova.conf进行配置，官方文档地址：，其中关于quotas的配置参数说明如下：
Table 5.8. Description of nova.conf file configuration options for quotasConfiguration option=Default value
(Type) Description
max_age=0
(IntOpt) number of seconds between subsequent usage refreshes
quota_cores=20
(IntOpt) number of instance cores allowed per project (tenant)
quota_driver=nova.quota.DbQuotaDriver
(StrOpt) Default driver to use for quota checks
quota_floating_ips=10
(IntOpt) number of floating ips allowed per project (tenant)
quota_gigabytes=1000
(IntOpt) number of volume gigabytes allowed per project (tenant)
quota_injected_file_content_bytes=10240
(IntOpt) number of bytes allowed per injected file
quota_injected_file_path_bytes=255
(IntOpt) number of bytes allowed per injected file path
quota_injected_files=5
(IntOpt) number of injected files allowed
quota_instances=10
(IntOpt) number of instances allowed per project (tenant)
quota_key_pairs=100
(IntOpt) number of key pairs allowed per user
quota_metadata_items=128
(IntOpt) number of metadata items allowed per instance
quota_ram=51200
(IntOpt) megabytes of instance ram allowed per project (tenant)
quota_security_group_rules=20
(IntOpt) number of security rules per security group
quota_security_groups=10
(IntOpt) number of security groups per project (tenant)
quota_volumes=10
(IntOpt) number of volumes allowed per project (tenant)
reservation_expire=86400
(IntOpt) number of seconds until a reservation expires
until_refresh=0
(IntOpt) count of reservations until usage is refreshed
仔细查找，其中并无关于Fixed_Ips的配置，比较疑惑，但是问题的确存在，在Project中创建超过10个实例时发生错误，日志显示错误内容如下：