SR-IOV功能介绍
SR-IOV 使一个单一的功能单元（比如，一个以太网端口）能看起来像多个独立的物理设备，即支持SR-IOV 功能的物理设备能被配置为多个功能单元。
SR-IOV 两种功能（function）：
物理功能（Physical Functions，PF）：这是完整的带有 SR-IOV 能力的PCIe 设备。PF 能像普通 PCI 设备那样被发现、管理和配置。
虚拟功能（Virtual Functions，VF）：简单的 PCIe 功能，它只能处理I/O。每个 VF 都是从 PF 中分离出来的。每个物理硬件都有一个 VF 数目的限制。一个 PF，能被虚拟成多个 VF 用于分配给多个虚拟机。
Hypervisor 能将一个或者多个 VF 分配给一个虚机。在某一时刻，一个 VF 只能被分配给一个虚机。一个虚机可以拥有多个 VF。在虚机的操作系统看来，一个 VF 网卡看起来和一个普通网卡没有区别。SR-IOV 驱动是在内核中实现的。
网卡 SR-IOV 的例子：
将sriov计算节点的PF虚拟化成多个VF
sriov计算节点选择光口1（例如 enp5s0f1）作为sriov网卡
在计算节点上，设置BIOS，对于Intel使支持VT-d，可通过cat /proc/cpuinfo | grep vmx验证
配置计算节点的/etc/default/grub文件，在GRUB_CMDLINE_LINUX中添加intel_iommu=on来激活VT-d功能，重启物理机（本环境采用intel 82599系列网卡）
$ cat /etc/default/grub
GRUB_TIMEOUT=5
GRUB_DISTRIBUTOR="$(sed 's, release .*$,,g' /etc/system-release)"
GRUB_DEFAULT=saved
GRUB_DISABLE_SUBMENU=true
GRUB_TERMINAL_OUTPUT="console"
GRUB_CMDLINE_LINUX="crashkernel=auto rd.lvm.lv=bclinux/root rd.lvm.lv=bclinux/swap intel_iommu=on rhgb quiet"
GRUB_DISABLE_RECOVERY="true"
$ grub2-mkconfig --output=/boot/grub2/grub.cfg
$ reboot- 本环境中82599网卡最多支持64个vf，拟在每个sriov计算节点虚拟出16个vf供使用命令如下：
# echo '16' > /sys/class/net/enp5s0f1/device/sriov_numvfs
###查看是否生效
# lspci | grep Ethernet
05:00.0 Ethernet controller [0200]: Intel Corporation 82599ES 10-Gigabit SFI/SFP+ Network Connection [8086:10fb] (rev 01)
05:00.1 Ethernet controller [0200]: Intel Corporation 82599ES 10-Gigabit SFI/SFP+ Network Connection [8086:10fb] (rev 01)
05:10.1 Ethernet controller [0200]: Intel Corporation 82599 Ethernet Controller Virtual Function [8086:10ed] (rev 01)
05:10.3 Ethernet controller [0200]: Intel Corporation 82599 Ethernet Controller Virtual Function [8086:10ed] (rev 01)
05:10.5 Ethernet controller [0200]: Intel Corporation 82599 Ethernet Controller Virtual Function [8086:10ed] (rev 01)
05:10.7 Ethernet controller [0200]: Intel Corporation 82599 Ethernet Controller Virtual Function [8086:10ed] (rev 01)
05:11.1 Ethernet controller [0200]: Intel Corporation 82599 Ethernet Controller Virtual Function [8086:10ed] (rev 01)
05:11.3 Ethernet controller [0200]: Intel Corporation 82599 Ethernet Controller Virtual Function [8086:10ed] (rev 01)
05:11.5 Ethernet controller [0200]: Intel Corporation 82599 Ethernet Controller Virtual Function [8086:10ed] (rev 01)
05:11.7 Ethernet controller [0200]: Intel Corporation 82599 Ethernet Controller Virtual Function [8086:10ed] (rev 01)
05:12.1 Ethernet controller [0200]: Intel Corporation 82599 Ethernet Controller Virtual Function [8086:10ed] (rev 01)
05:12.3 Ethernet controller [0200]: Intel Corporation 82599 Ethernet Controller Virtual Function [8086:10ed] (rev 01)
05:12.5 Ethernet controller [0200]: Intel Corporation 82599 Ethernet Controller Virtual Function [8086:10ed] (rev 01)
05:12.7 Ethernet controller [0200]: Intel Corporation 82599 Ethernet Controller Virtual Function [8086:10ed] (rev 01)
05:13.1 Ethernet controller [0200]: Intel Corporation 82599 Ethernet Controller Virtual Function [8086:10ed] (rev 01)
05:13.3 Ethernet controller [0200]: Intel Corporation 82599 Ethernet Controller Virtual Function [8086:10ed] (rev 01)
05:13.5 Ethernet controller [0200]: Intel Corporation 82599 Ethernet Controller Virtual Function [8086:10ed] (rev 01)
05:13.7 Ethernet controller [0200]: Intel Corporation 82599 Ethernet Controller Virtual Function [8086:10ed] (rev 01)
08:00.0 Ethernet controller [0200]: Intel Corporation I350 Gigabit Network Connection [8086:1521] (rev 01)
08:00.1 Ethernet controller [0200]: Intel Corporation I350 Gigabit Network Connection [8086:1521] (rev 01)
# ip link show enp5s0f1
5: enp5s0f1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP mode DEFAULT qlen 1000
link/ether 6c:92:bf:04:66:01 brd ff:ff:ff:ff:ff:ff
vf 0 MAC 00:00:00:00:00:00, spoof checking on, link-state auto, trust off, query_rss off
vf 1 MAC 00:00:00:00:00:00, spoof checking on, link-state auto, trust off, query_rss off
vf 2 MAC 00:00:00:00:00:00, spoof checking on, link-state auto, trust off, query_rss off
vf 3 MAC 00:00:00:00:00:00, spoof checking on, link-state auto, trust off, query_rss off
vf 4 MAC 00:00:00:00:00:00, spoof checking on, link-state auto, trust off, query_rss off
vf 5 MAC 00:00:00:00:00:00, spoof checking on, link-state auto, trust off, query_rss off
vf 6 MAC 00:00:00:00:00:00, spoof checking on, link-state auto, trust off, query_rss off
vf 7 MAC 00:00:00:00:00:00, spoof checking on, link-state auto, trust off, query_rss off
vf 8 MAC 00:00:00:00:00:00, spoof checking on, link-state auto, trust off, query_rss off
vf 9 MAC 00:00:00:00:00:00, spoof checking on, link-state auto, trust off, query_rss off
vf 10 MAC 00:00:00:00:00:00, spoof checking on, link-state auto, trust off, query_rss off
vf 11 MAC 00:00:00:00:00:00, spoof checking on, link-state auto, trust off, query_rss off
vf 12 MAC 00:00:00:00:00:00, spoof checking on, link-state auto, trust off, query_rss off
vf 13 MAC 00:00:00:00:00:00, spoof checking on, link-state auto, trust off, query_rss off
vf 14 MAC 00:00:00:00:00:00, spoof checking on, link-state auto, trust off, query_rss off
vf 15 MAC 00:00:00:00:00:00, spoof checking on, link-state auto, trust off, query_rss off- 保证重启后vfs仍然存在，需要将设置vf的数目命令写入/etc/rc.local，命令如下
# echo "echo '16' > /sys/class/net/enp5s0f1/device/sriov_numvfs" >> /etc/rc.local
# chmod +x /etc/rc.local /etc/rc.d/rc.local- 修改控制节点nova.conf文件，让nova-schedule支持对pci passthrough的过滤
# vim /etc/nova/nova.conf
enable_filters = RetryFilter, AvailabilityZoneFilter, RamFilter, ComputeFilter, ComputeCapabilitiesFilter, ImagePropertiesFilter, ServerGroupAntiAffinityFilter, ServerGroupAffinityFilter, PciPassthroughFilter
available_filters = nova.scheduler.filters.all_filters
# systemctl restart openstack-nova-scheduler配置SRIOV虚机计算节点
- 安装neutron-sriov-agent
# yum install openstack-neutron-sriov-nic-agent openstack-neutron配置neutron.conf
可以将控制节点neutron.conf配置拷贝过来，修改相应参数即可，主要是修改本地管理网ip参数配置sriov_agent.ini
# vim /etc/neutron/plugins/ml2/sriov_agent.ini
[securitygroup]
firewall_driver = neutron.agent.firewall.NoopFirewallDriver
[sriov_nic]
physical_device_mappings = default: enp5s0f1
exclude_devices =- 启动neutron-sriov-agent服务
# systemctl enable neutron-sriov-nic-agent
# systemctl start neutron-sriov-nic-agent- 修改该节点nova.conf文件，重启nova-compute
# vim /etc/nova/nova.conf
passthrough_whitelist = {"devname": "enp5s0f1", "physical_network": "physnet1"}
# systemctl restart openstack-nova-compute若需要配置多块SRIOV网卡
[root@controller ~]# vim /etc/nova/nova.conf
[pci]
passthrough_whitelist = {"devname": "enp129s0f0", "physical_network": "physnet1"}
passthrough_whitelist = {"devname": "enp130s0f0", "physical_network": "physnet1"}
[root@SRIOV03 ~]# vim /etc/neutron/plugins/ml2/sriov_agent.ini
[sriov_nic]
physical_device_mappings = physnet1:enp129s0f0,physnet1:enp130s0f0
测试srivo非亲和功能
即：设定vm的两个vnic在同一个非亲和组，生成的sriov虚拟机的两个vnic会分布在不同的两个物理SRIOV网卡上
[root@controller ~]# openstack port create --vnic-type direct --binding-profile anti_affinity_group=gwgh729 --network 40fa3655-1dc6-4fa1-8a21-507ae2a92cc5 sriov-port-1
+-----------------------+-----------------------------------------------------------------------------+
| Field | Value |
+-----------------------+-----------------------------------------------------------------------------+
| admin_state_up | UP |
| allowed_address_pairs | |
| binding_host_id | |
| binding_profile | anti_affinity_group='gwgh729' |
| binding_vif_details | |
| binding_vif_type | unbound |
| binding_vnic_type | direct |
| created_at | 2018-10-11T07:11:06Z |
| data_plane_status | None |
| description | |
| device_id | |
| device_owner | |
| dns_assignment | None |
| dns_name | None |
| extra_dhcp_opts | |
| fixed_ips | ip_address='192.168.5.48', subnet_id='8e026845-10d0-486b-9e34-45f2f2f01ada' |
| id | cb96ed5a-9bbc-46f7-9a44-fdc45e11b25b |
| ip_address | None |
| mac_address | fa:16:3e:c8:f7:9f |
| name | sriov-port-1 |
| network_id | 40fa3655-1dc6-4fa1-8a21-507ae2a92cc5 |
| option_name | None |
| option_value | None |
| port_security_enabled | True |
| project_id | 39db8ee1aced4109aa7ea45c9b45aa97 |
| qos_policy_id | None |
| revision_number | 3 |
| security_group_ids | 46a06d50-4ed7-495f-9458-eab6843495a8 |
| status | DOWN |
| subnet_id | None |
| tags | |
| trunk_details | None |
| updated_at | 2018-10-11T07:11:07Z |
+-----------------------+-----------------------------------------------------------------------------+
[root@controller ~]# openstack port create --vnic-type direct --binding-profile anti_affinity_group=gwgh729 --network 40fa3655-1dc6-4fa1-8a21-507ae2a92cc5 sriov-port-2
+-----------------------+-----------------------------------------------------------------------------+
| Field | Value |
+-----------------------+-----------------------------------------------------------------------------+
| admin_state_up | UP |
| allowed_address_pairs | |
| binding_host_id | |
| binding_profile | anti_affinity_group='gwgh729' |
| binding_vif_details | |
| binding_vif_type | unbound |
| binding_vnic_type | direct |
| created_at | 2018-10-11T07:11:17Z |
| data_plane_status | None |
| description | |
| device_id | |
| device_owner | |
| dns_assignment | None |
| dns_name | None |
| extra_dhcp_opts | |
| fixed_ips | ip_address='192.168.5.60', subnet_id='8e026845-10d0-486b-9e34-45f2f2f01ada' |
| id | d8ae3337-b98a-4523-9665-ed7773c6da90 |
| ip_address | None |
| mac_address | fa:16:3e:23:0e:45 |
| name | sriov-port-2 |
| network_id | 40fa3655-1dc6-4fa1-8a21-507ae2a92cc5 |
| option_name | None |
| option_value | None |
| port_security_enabled | True |
| project_id | 39db8ee1aced4109aa7ea45c9b45aa97 |
| qos_policy_id | None |
| revision_number | 3 |
| security_group_ids | 46a06d50-4ed7-495f-9458-eab6843495a8 |
| status | DOWN |
| subnet_id | None |
| tags | |
| trunk_details | None |
| updated_at | 2018-10-11T07:11:17Z |
+-----------------------+-----------------------------------------------------------------------------+
[root@controller ~]# nova boot han-sriov-antiaffinity --image 4ce53c0e-b3f5-4463-bdcd-20ee0f74fec6 --flavor 071b6288-8087-4d2e-959a-0b3bbb7fc565 --nic port-id=cb96ed5a-9bbc-46f7-9a44-fdc45e11b25b --nic port-id=d8ae3337-b98a-4523-9665-ed7773c6da90 --availability-zone sriov:SRIOV03
+--------------------------------------+------------------------------------------------------+
| Property | Value |
+--------------------------------------+------------------------------------------------------+
| OS-DCF:diskConfig | MANUAL |
| OS-EXT-AZ:availability_zone | sriov |
| OS-EXT-SRV-ATTR:host | - |
| OS-EXT-SRV-ATTR:hostname | han-sriov-antiaffinity |
| OS-EXT-SRV-ATTR:hypervisor_hostname | - |
| OS-EXT-SRV-ATTR:instance_name | |
| OS-EXT-SRV-ATTR:kernel_id | |
| OS-EXT-SRV-ATTR:launch_index | 0 |
| OS-EXT-SRV-ATTR:ramdisk_id | |
| OS-EXT-SRV-ATTR:reservation_id | r-3vjlmls4 |
| OS-EXT-SRV-ATTR:root_device_name | - |
| OS-EXT-SRV-ATTR:user_data | - |
| OS-EXT-STS:power_state | 0 |
| OS-EXT-STS:task_state | scheduling |
| OS-EXT-STS:vm_state | building |
| OS-SRV-USG:launched_at | - |
| OS-SRV-USG:terminated_at | - |
| accessIPv4 | |
| accessIPv6 | |
| adminPass | Z255abC53sLN |
| config_drive | |
| created | 2018-10-11T07:12:43Z |
| description | - |
| flavor:disk | 10 |
| flavor:ephemeral | 0 |
| flavor:extra_specs | {} |
| flavor:original_name | 2u4g10g |
| flavor:ram | 4096 |
| flavor:swap | 0 |
| flavor:vcpus | 2 |
| hostId | |
| host_status | |
| id | ea80e14b-2b9a-4a31-ad27-94366fa600bf |
| image | centos7-10-08 (4ce53c0e-b3f5-4463-bdcd-20ee0f74fec6) |
| key_name | - |
| locked | False |
| metadata | {} |
| name | han-sriov-antiaffinity |
| os-extended-volumes:volumes_attached | [] |
| progress | 0 |
| security_groups | default |
| status | BUILD |
| tags | [] |
| tenant_id | 39db8ee1aced4109aa7ea45c9b45aa97 |
| updated | 2018-10-11T07:12:43Z |
| user_id | f6b12716402343e6beacdaa265e4e6c5 |
+--------------------------------------+------------------------------------------------------+
[root@controller ~]# nova show han-sriov-antiaffinity
+--------------------------------------+----------------------------------------------------------+
| Property | Value |
+--------------------------------------+----------------------------------------------------------+
| OS-DCF:diskConfig | MANUAL |
| OS-EXT-AZ:availability_zone | sriov |
| OS-EXT-SRV-ATTR:host | SRIOV03 |
| OS-EXT-SRV-ATTR:hostname | han-sriov-antiaffinity |
| OS-EXT-SRV-ATTR:hypervisor_hostname | SRIOV03 |
| OS-EXT-SRV-ATTR:instance_name | instance-00000cfd |
| OS-EXT-SRV-ATTR:kernel_id | |
| OS-EXT-SRV-ATTR:launch_index | 0 |
| OS-EXT-SRV-ATTR:ramdisk_id | |
| OS-EXT-SRV-ATTR:reservation_id | r-3vjlmls4 |
| OS-EXT-SRV-ATTR:root_device_name | /dev/vda |
| OS-EXT-SRV-ATTR:user_data | - |
| OS-EXT-STS:power_state | 1 |
| OS-EXT-STS:task_state | - |
| OS-EXT-STS:vm_state | active |
| OS-SRV-USG:launched_at | 2018-10-11T07:14:49.000000 |
| OS-SRV-USG:terminated_at | - |
| accessIPv4 | |
| accessIPv6 | |
| config_drive | |
| created | 2018-10-11T07:12:42Z |
| description | - |
| flavor:disk | 10 |
| flavor:ephemeral | 0 |
| flavor:extra_specs | {} |
| flavor:original_name | 2u4g10g |
| flavor:ram | 4096 |
| flavor:swap | 0 |
| flavor:vcpus | 2 |
| hostId | c9ae967a850ab4bf64f157ac3c05ef0adb86743d3a1f86115cda7f04 |
| host_status | UP |
| id | ea80e14b-2b9a-4a31-ad27-94366fa600bf |
| image | centos7-10-08 (4ce53c0e-b3f5-4463-bdcd-20ee0f74fec6) |
| key_name | - |
| locked | False |
| metadata | {} |
| name | han-sriov-antiaffinity |
| os-extended-volumes:volumes_attached | [] |
| progress | 0 |
| security_groups | default |
| status | ACTIVE |
| tags | [] |
| tenant_id | 39db8ee1aced4109aa7ea45c9b45aa97 |
| updated | 2018-10-11T07:13:37Z |
| user_id | f6b12716402343e6beacdaa265e4e6c5 |
| vlan811-common network | 192.168.5.48, 192.168.5.60 |
+--------------------------------------+----------------------------------------------------------+
[root@SRIOV03 ~]# ip link show enp130s0f0|grep fa:16:3e:c8:f7:9f
[root@SRIOV03 ~]# ip link show enp129s0f0|grep fa:16:3e:c8:f7:9f
vf 0 MAC fa:16:3e:c8:f7:9f, vlan 811, spoof checking on, link-state auto, trust off, query_rss off
[root@SRIOV03 ~]# ip link show enp130s0f0|grep fa:16:3e:23:0e:45
vf 0 MAC fa:16:3e:23:0e:45, vlan 811, spoof checking on, link-state auto, trust off, query_rss off
[root@SRIOV03 ~]# ip link show enp129s0f0|grep fa:16:3e:23:0e:45
[root@SRIOV03 ~]# mac地址为fa:16:3e:c8:f7:9f的vnic落在enp129s0f0，mac地址为fa:16:3e:23:0e:45的vnic落在enp130s0f0
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