Openstack版本号：Liberty

系统平台：CentOS 7.2 64bit

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1.现象：

管理员登陆Dasgboard,查看项目》网络》网络》选择一个网络》选择一个子网》查看网络ID，例如以下：

查看httpd日志报错例如以下：

tail -f /etc/httpd/logs/error_log

[Tue Apr 12 10:24:08.830778 2016] [:error] [pid 94866] Error while checking action permissions.

[Tue Apr 12 10:24:08.830848 2016] [:error] [pid 94866] Traceback (most recent call last):

[Tue Apr 12 10:24:08.830854 2016] [:error] [pid 94866]   File "/usr/lib/python2.7/site-packages/horizon/tables/base.py", line 1270, in _filter_action

[Tue Apr 12 10:24:08.830859 2016] [:error] [pid 94866]     return action._allowed(request, datum) and row_matched

[Tue Apr 12 10:24:08.830862 2016] [:error] [pid 94866]   File "/usr/lib/python2.7/site-packages/horizon/tables/actions.py", line 135, in _allowed

[Tue Apr 12 10:24:08.830866 2016] [:error] [pid 94866]     self.allowed(request, datum))

[Tue Apr 12 10:24:08.830873 2016] [:error] [pid 94866]   File "/usr/share/openstack-dashboard/openstack_dashboard/wsgi/../../openstack_dashboard/dashboards/project/networks/subnets/tables.py", line 103, in allowed

[Tue Apr 12 10:24:08.830883 2016] [:error] [pid 94866]     if usages['subnets']['available'] <= 0:

[Tue Apr 12 10:24:08.830899 2016] [:error] [pid 94866] KeyError: 'available'

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2.问题解决：

改动/usr/share/openstack-dashboard/openstack_dashboard/dashboards/project/networks/subnets/tables.py源码例如以下：

class CreateSubnet(SubnetPolicyTargetMixin, CheckNetworkEditable,

                   tables.LinkAction):

    name = "create"

    verbose_name = _("Create Subnet")

    url = "horizon:project:networks:addsubnet"

    classes = ("ajax-modal",)

    icon = "plus"

    policy_rules = (("network", "create_subnet"),)

    def get_link_url(self, datum=None):

        network_id = self.table.kwargs['network_id']

        return reverse(self.url, args=(network_id,))

    def allowed(self, request, datum=None):

        usages = quotas.tenant_quota_usages(request)

        if usages['subnets'].get('available', 1) <= 0:

            if 'disabled' not in self.classes:

                self.classes = [c for c in self.classes] + ['disabled']

                self.verbose_name = _('Create Subnet (Quota exceeded)')

        else:

            self.verbose_name = _('Create Subnet')

            self.classes = [c for c in self.classes if c != 'disabled']

        return True