Cinder 驱动程序使用 NetApp API 初始化失败。原因-408：请求超时

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适用于

OpenStack Cinder 使用 NetApp ONTAP 驱动程序
Red Hat OpenStack Platform (RHOSP)
Cinder 主机与 ONTAP 之间存在中间网络设备的环境

问题描述

当为 NetApp ONTAP 后端存储配置时，OpenStack Cinder 驱动程序初始化失败。在 Cinder 日志中会反复看到以下错误：

Failed to initialize driver.: cinder.volume.drivers.netapp.dataontap.client.api.NaApiError: NetApp API failed. Reason-408: Request Timeoutcinder.volume.manager urllib.error.HTTPError: HTTPError 408: Request Timeout
cinder.volume.drivers.netapp.dataontap.client.api.NaApiError: NetApp API failed. Reason-408: Request Timeout

验证：
使用增加的数据包大小运行 ping 测试以检查 MTU 行为：

示例命令：
ping -M do -s 1620 <ONTAP-IP>
ping -M do -s 1621 <ONTAP-IP>
ping <ONTAP-IP> vrf <VRF_NAME> packet-size 1620
ping <ONTAP-IP> vrf <VRF_NAME> packet-size 1621

注意：
<VRF_NAME> = 路由器上的虚拟路由和转发表（例如，带外管理 VRF）。
<ONTAP-IP> = ONTAP 集群管理 IP。

示例输出：

成功案例

RHEL3# ping 10.x.x.x vrf <VRF_NAME> packet-size 1620
PING 10.x.x.x (10.x.x.x): 1620 data bytes
1628 bytes from 10.x.x.x: icmp_seq0 ttl=63 time=0.886 ms
1628 bytes from 10.x.x.x: icmp_seq1 ttl=63 time=0.705 ms
1628 bytes from 10.x.x.x: icmp_seq2 ttl=63 time=0.785 ms
1628 bytes from 10.x.x.x: icmp_seq3 ttl=63 time=0.697 ms
1628 bytes from 10.x.x.x: icmp_seq4 ttl=63 time=0.646 ms

--- <IP_ADDRESS> ping statistics ---
5 packets transmitted, 5 packets received, 0.00% packet loss
round-trip min/avg/max = 0.646/0.705/0.886 ms

故障案例

RHEL3# ping 10.x.x.x vrf <VRF_NAME> packet-size 1621
PING 10.x.x.x (10.x.x.x): 1621 data bytes
Request 1 timed out
Request 2 timed out
Request 3 timed out
Request 4 timed out
Request 5 timed out

--- <IP_ADDRESS> ping statistics ---
5 packets transmitted, 0 packets received, 100.00% packet loss