Intel E810

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Sissejuhatus

Üldistel teemadel sobib tutvuda tekstiga https://www.auul.pri.ee/wiki/Mellanox_ConnectX-6_Lx

Kasutada on võrgukaardi riistvara 

# lspci | grep 810
81:00.0 Ethernet controller: Intel Corporation Ethernet Controller E810-XXV for SFP (rev 02)
81:00.1 Ethernet controller: Intel Corporation Ethernet Controller E810-XXV for SFP (rev 02)

dpdk abil liikluse kohale toomine ovs switchi juurde

Väited

  • eesmärgiks on füüsiliselt võrgust kohale tuua ovs switchi peale füüsilise võrgukaardi juures dpdk lahendust kasutades võimalikult palju liiklust
  • switchi peale on tekitatud üks ovs internal port (internal port on näha ka operatsioonisüteemi jaoks, st tema poole saab eemalt pöörduda, nt pve webgui kasutamiseks ja ssh abil sisse logimiseks)
  • ei tegelda liikluse edasi jõudmisega ovs switchi külge kinnitatud virtuaalse arvuti juurde
  • tegevused toimuvad PVE v. 8.2 keskkonnas
  • midagi ei kompileerita st kõik paigaldatakse Debian ja PVE tava apt repost

Tulemuseks ovs switch kasutamise osa seadistus paistab selline 

# ovs-vsctl show
26f5a7ed-dfe6-49bb-978f-062dd420f331
    Bridge vmbr0
        datapath_type: netdev
        Port vmbr0
            Interface vmbr0
                type: internal
        Port dpdk-p0
            Interface dpdk-p0
                type: dpdk
                options: {dpdk-devargs="0000:81:00.0"}
        Port inter
            Interface inter
                type: internal
    ovs_version: "3.1.0"

ning ovs üldosa seadistus 

# ovs-vsctl list open_vSwitch
_uuid               : 26f5a7ed-dfe6-49bb-978f-062dd420f331
bridges             : [4b2f6152-da5c-495b-bd7f-c3020d8e4012]
cur_cfg             : 17
datapath_types      : [netdev, system]
datapaths           : {}
db_version          : "8.3.1"
dpdk_initialized    : true
dpdk_version        : "DPDK 22.11.5"
external_ids        : {hostname=valgustaja1, rundir="/var/run/openvswitch", system-id="257085fe-47b8-4b5d-b894-3063fbb645e2"}
iface_types         : [afxdp, afxdp-nonpmd, bareudp, dpdk, dpdkvhostuser, dpdkvhostuserclient, erspan, geneve, gre, gtpu, internal, ip6erspan, ip6gre, lisp, patch, stt, system, tap, vxlan]
manager_options     : []
next_cfg            : 17
other_config        : {dpdk-init="true", dpdk-lcore-mask="0x1", dpdk-socket-mem="4096", pmd-cpu-mask="0x0ff0", userspace-tso-enable="false", vhost-iommu-support="true"}
ovs_version         : "3.1.0"
ssl                 : []
statistics          : {}
system_type         : debian
system_version      : "12"

ning 

root@valgustaja1# ifconfig 
inter: flags=4419<UP,BROADCAST,RUNNING,PROMISC,MULTICAST>  mtu 1500
        inet 10.40.134.18  netmask 255.255.255.248  broadcast 10.40.134.23
        inet6 fe80::b470:b7ff:fe0c:8ea9  prefixlen 64  scopeid 0x20<link>
        ether b6:70:b7:0c:8e:a9  txqueuelen 1000  (Ethernet)
        RX packets 9783611  bytes 14414601922 (13.4 GiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 4824979  bytes 409852147 (390.8 MiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 1000  (Local Loopback)
        RX packets 307863  bytes 56590252 (53.9 MiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 307863  bytes 56590252 (53.9 MiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

Sellise olukorra saavutamiseks Ubuntu v. 24.04 operatsioonisüsteemil paigaldatakse tarkvara OVS-DPDK, sobib taustaks vaadata juhendeid

Tarkvara paigaldamine, ice ehk intel e810 mudeli dpdk teek ei paigaldata muu hulgas sõltuvusena koos openvswitch-switch-dpdk paketiga, kuigi hulka librte-net-xxx pakette seejuures paigaldatakse 

valgustaja1# apt-get install openvswitch-switch-dpdk 
valgustaja1# apt-get install librte-net-ice23

Peale tarkvara paigaldamist on ovs käivitatud olekus ning sobib seda edasi seadistada 

valgustaja1# echo 6144 > /sys/kernel/mm/hugepages/hugepages-2048kB/nr_hugepages
valgustaja1# ovs-vsctl set Open_vSwitch . "other_config:dpdk-socket-mem=4096"
valgustaja1# ovs-vsctl set Open_vSwitch . "other_config:pmd-cpu-mask=0x100000100000"
valgustaja1# ovs-vsctl set Open_vSwitch . "other_config:vhost-iommu-support=true"
valgustaja1# ovs-vsctl set Open_vSwitch . "other_config:userspace-tso-enable=false"
valgustaja1# ovs-vsctl set Open_vSwitch . "other_config:dpdk-lcore-mask=0x1"
valgustaja1# ovs-vsctl set Open_vSwitch . "other_config:dpdk-init=true"

librte dpdk teegi kasutamiseks sobib öelda 

valgustaja1# modprobe vfio-pci
valgustaja1# modprobe vfio
valgustaja1# dpdk-devbind.py --bind=vfio-pci 0000:81:00.0
valgustaja1# dpdk-devbind.py --bind=vfio-pci 0000:81:00.1

Tulemusena paistab 

# dpdk-devbind.py --status

Network devices using DPDK-compatible driver
============================================
0000:81:00.0 'Ethernet Controller E810-XXV for SFP 159b' drv=vfio-pci unused=ice
0000:81:00.1 'Ethernet Controller E810-XXV for SFP 159b' drv=vfio-pci unused=ice

..

OVS switchi tekitamine ja füüsilise kaardi pordi ühendamine 

valgustaja1# ovs-vsctl add-br vmbr0 -- set bridge vmbr0 datapath_type=netdev
valgustaja1# ovs-vsctl add-port vmbr0 dpdk-p0 -- set Interface dpdk-p0 type=dpdk options:dpdk-devargs=0000:81:00.0
valgustaja1# ovs-vsctl add-port vmbr0 inter -- set interface inter type=internal
valgustaja1# ifconfig inter 10.40.134.18/29
valgustaja1# route add default gw 10.40.134.17

Ootus on et tulemusena saab pve host arvutist pingida gw ip aadressi ja arvuti on võrku ühendatud.

Probleemid, kui librte-net-ice23 pakett on puudu, siis saab selliseid vigu 

TODO

dpdk abil liikluse kohale toomine ovs switchi kaudu qemu virtuaalse arvuti juurde - vhost user protokoll

Tulemuseks ovs switch kasutamise osa seadistus paistab selline 

# ovs-vsctl show
26f5a7ed-dfe6-49bb-978f-062dd420f331
    Bridge vmbr0
        datapath_type: netdev
        Port vmbr0
            Interface vmbr0
                type: internal
        Port vhost-user-1
            tag: 3564
            Interface vhost-user-1
                type: dpdkvhostuserclient
                options: {vhost-server-path="/var/run/vhostuserclient/vhost-user-client-1"}
        Port vhost-user-2
            tag: 3564
            Interface vhost-user-2
                type: dpdkvhostuserclient
                options: {vhost-server-path="/var/run/vhostuserclient/vhost-user-client-2"}
        Port dpdk-p0
            Interface dpdk-p0
                type: dpdk
                options: {dpdk-devargs="0000:81:00.0", n_rxq="8"}
        Port inter
            Interface inter
                type: internal
    ovs_version: "3.1.0"

kus

  • vhost-user-1 port vastab ühe virtuaalse arvuti ühele võrguliidesele
  • vhost-user-2 port vastab teise virtuaalse arvuti ühele võrguliidesele
  • /var/run/vhostuserclient/vhost-user-client-1 on unix socket, mille tekitab qemu/kvm protsess virtuaalse arvuti käivitamisel (selle tekitamist õpetab /etc/pve/qemu-server/1102.conf seadistus)

OVS osa tekitatakse eelmises punktis, lisaks on oluline tekitada OVS juurde port, nt 

valgustaja1# mkdir /var/run/vhostuserclient

valgustaja1# ovs-vsctl add-port vmbr0 vhost-user-1 -- set Interface vhost-user-1 type=dpdkvhostuserclient "options:vhost-server-path=/var/run/vhostuserclient/vhost-user-client-1"
valgustaja1# ovs-vsctl set port vhost-user-1 tag=3564

valgustaja1# ovs-vsctl add-port vmbr0 vhost-user-2 -- set Interface vhost-user-2 type=dpdkvhostuserclient "options:vhost-server-path=/var/run/vhostuserclient/vhost-user-client-2"
valgustaja1# ovs-vsctl set port vhost-user-2 tag=3564


kasutada sobiva seadistusega PVE virtuaalset arvutit, nt ühe arvuti puhul 

valgustaja1# cat /etc/pve/qemu-server/1102.conf
agent: 1
args: -machine q35+pve0,kernel_irqchip=split \
  -device intel-iommu,intremap=on,caching-mode=on \
  -chardev socket,id=char1,path=/var/run/vhostuserclient/vhost-user-client-1,server=on \
  -netdev type=vhost-user,id=mynet1,chardev=char1,vhostforce=on,queues=4 \
  -device virtio-net-pci,mac=12:4A:8D:1E:33:3D,netdev=mynet1,mq=on,vectors=10,rx_queue_size=1024,tx_queue_size=256
bios: ovmf
boot: order=virtio0;ide2;net0
cores: 8
cpu: host
efidisk0: local-to-valgustaja-1-lvm-over-mdadm:vm-1102-disk-0,efitype=4m,pre-enrolled-keys=1,size=4M
hugepages: 1024
ide2: none,media=cdrom
machine: q35
memory: 8192
meta: creation-qemu=9.0.0,ctime=1720472955
name: imre-ubuntu-2404-01
numa: 1
ostype: l26
rng0: source=/dev/urandom
scsihw: virtio-scsi-single
serial0: socket
smbios1: uuid=eff2a3c6-e3e6-4ccf-889b-33babc49c3fc
sockets: 1
tpmstate0: local-to-valgustaja-1-lvm-over-mdadm:vm-1102-disk-1,size=4M,version=v2.0
vcpus: 8
vga: virtio
virtio0: local-to-valgustaja-1-lvm-over-mdadm:vm-1102-disk-2,backup=0,iothread=1,size=20G
vmgenid: ec8bc8c2-1279-43d2-bfca-9d7b9081c97f

kus

  • TODO

ja teise arvuti puhul 

TODO

OVS jaoks täiendavate arvutusressursside andmiseks sobib öelda 

valgustaja1# ovs-vsctl set Interface dpdk-p0 "options:n_rxq=8"
valgustaja1# ovs-vsctl set Open_vSwitch . other_config:pmd-cpu-mask=0x0ff0

dpdk abil liikluse kohale toomine ovs-dpdk switchi kaudu qemu virtuaalse arvuti juurde - vf representor

TODO

liikluse kohale toomine ovs-tava switchi kaudu qemu virtuaalse arvuti juurde - vf representor

Esmalt veendutakse, et E810 füüsiline võrgukaart on olemas; ja eswitch legacy režiimis 

root@valgustaja1:~# lspci | grep -i ether
81:00.0 Ethernet controller: Intel Corporation Ethernet Controller E810-XXV for SFP (rev 02)
81:00.1 Ethernet controller: Intel Corporation Ethernet Controller E810-XXV for SFP (rev 02)

root@valgustaja1:~# devlink dev eswitch show pci/0000:81:00.0
pci/0000:81:00.0: mode legacy
root@valgustaja1:~# devlink dev eswitch show pci/0000:81:00.1
pci/0000:81:00.1: mode legacy

ning ovs switch on sisuhalduse mõttes tühi 

# ovs-vsctl show
3b64530c-2083-4b56-8d1d-71432d70088d
ovs_version: "3.1.0"

Moodustatakse ovs switch nö sisuhalduse mõttes 

ovs-vsctl add-br vmbr1

Lülitatakse E810 füüsilise kaardi esimene füüsiline port legacy -> switchdev režiimi 

devlink dev eswitch set pci/0000:81:00.0 mode switchdev

Moodustatakse virtuaalse funktsioonid, on näha kahe VF seadme lisandumine, ning representor pordid eth0 ja eth1 

echo 2 > /sys/class/net/enp129s0f0np0/device/sriov_numvfs

root@valgustaja1:~# lspci | grep -i ether
81:00.0 Ethernet controller: Intel Corporation Ethernet Controller E810-XXV for SFP (rev 02)
81:00.1 Ethernet controller: Intel Corporation Ethernet Controller E810-XXV for SFP (rev 02)
81:01.0 Ethernet controller: Intel Corporation Ethernet Adaptive Virtual Function (rev 02)
81:01.1 Ethernet controller: Intel Corporation Ethernet Adaptive Virtual Function (rev 02)

root@valgustaja1:~# ifconfig
..
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet6 fe80::94a8:f5ff:fe7e:f39a  prefixlen 64  scopeid 0x20<link>
        ether 96:a8:f5:7e:f3:9a  txqueuelen 1000  (Ethernet)
        RX packets 753559909  bytes 1076089356125 (1002.1 GiB)
        RX errors 0  dropped 85139  overruns 0  frame 0
        TX packets 50662678  bytes 3084578269 (2.8 GiB)
        TX errors 138  dropped 0 overruns 0  carrier 0  collisions 0

eth1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet6 fe80::2897:51ff:fedd:3f45  prefixlen 64  scopeid 0x20<link>
        ether 2a:97:51:dd:3f:45  txqueuelen 1000  (Ethernet)
        RX packets 50083259  bytes 3048031940 (2.8 GiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 733515340  bytes 1045762229827 (973.9 GiB)
        TX errors 26  dropped 0 overruns 0  carrier 0  collisions 0
...

Omistatakse mac aadressid VF jaoks 

root@valgustaja1:~# ip link set enp129s0f0np0 vf 0 mac 2e:38:4d:3d:61:ed
root@valgustaja1:~# ip link set enp129s0f0np0 vf 1 mac 2e:38:4d:3d:61:ee

root@valgustaja1:~# ip link show dev enp129s0f0np0
2: enp129s0f0np0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq master ovs-system state UP mode DEFAULT group default qlen 1000
    link/ether 3c:ec:ef:e0:ef:24 brd ff:ff:ff:ff:ff:ff
    vf 0     link/ether 2e:38:4d:3d:61:ed brd ff:ff:ff:ff:ff:ff, spoof checking on, link-state enable, trust off
    vf 1     link/ether 2e:38:4d:3d:61:ee brd ff:ff:ff:ff:ff:ff, spoof checking on, link-state enable, trust off

Lülitakse hw offload 

root@valgustaja1:~# ethtool -K eth0 hw-tc-offload on
root@valgustaja1:~# ethtool -K eth1 hw-tc-offload on

root@valgustaja1:~# ovs-vsctl set Open_vSwitch . other_config:hw-offload=true
root@valgustaja1:~# ovs-vsctl set Open_vSwitch . other_config:tc-policy=skip_sw
root@valgustaja1:~# systemctl restart openvswitch-switch

Lisatakse representor pordid ovs switchi külge, ja käivitatakse 

root@valgustaja1:~# ovs-vsctl add-port vmbr0 eth0
root@valgustaja1:~# ovs-vsctl add-port vmbr0 eth1
root@valgustaja1:~# ip link set eth0 up
root@valgustaja1:~# ip link set eth1 up

Tulemusena on moodustunud selline OVS üldine seadistus 

root@valgustaja1:~/20240713# ovs-vsctl list open_vSwitch
_uuid               : 3b64530c-2083-4b56-8d1d-71432d70088d
bridges             : [35eebef7-6be8-444a-bf5f-ae2089c3add4]
cur_cfg             : 13
datapath_types      : [netdev, system]
datapaths           : {}
db_version          : "8.3.1"
dpdk_initialized    : false
dpdk_version        : "DPDK 22.11.5"
external_ids        : {hostname=valgustaja1.eenet.ee, rundir="/var/run/openvswitch", system-id="257085fe-47b8-4b5d-b894-3063fbb645e2"}
iface_types         : [afxdp, afxdp-nonpmd, bareudp, erspan, geneve, gre, gtpu, internal, ip6erspan, ip6gre, lisp, patch, stt, system, tap, vxlan]
manager_options     : []
next_cfg            : 13
other_config        : {hw-offload="true", tc-policy=skip_sw}
ovs_version         : "3.1.0"
ssl                 : []
statistics          : {}
system_type         : debian
system_version      : "12"

ja selline OVS sisuhaldus 

root@valgustaja1:~/20240713# ovs-vsctl show
3b64530c-2083-4b56-8d1d-71432d70088d
    Bridge vmbr0
        Port eth0
            Interface eth0
        Port vmbr0
            Interface vmbr0
                type: internal
        Port eth1
            Interface eth1
    ovs_version: "3.1.0"

Füüsilise kaardi lisamine ovs külge 

root@valgustaja1:~# ovs-vsctl add-port vmbr0 enp129s0f0np0
root@valgustaja1:~# ip link set enp129s0f0np0 up
root@valgustaja1:~# ethtool -K eth1 hw-tc-offload on

Internal liidese lisamine host'i (selleks, et eemalt saaks pve hostile ligi) 

valgustaja1# ovs-vsctl add-port vmbr0 inter -- set interface inter type=internal
valgustaja1# ifconfig inter 10.40.134.18/29
valgustaja1# route add default gw 10.40.134.17

port representorite ja co kaudu suheldakse virtuaalsete arvutitega, asjakohane on vlan seadistamine 

valgustaja1# ovs-vsctl set port eth0 tag=3564
valgustaja1# ovs-vsctl set port eth1 tag=3564

Tulemusena 

root@valgustaja1:~/20240713# ovs-vsctl show
3b64530c-2083-4b56-8d1d-71432d70088d
    Bridge vmbr0
        Port eth0
            tag: 3564
            Interface eth0
        Port inter
            Interface inter
                type: internal
        Port enp129s0f0np0
            Interface enp129s0f0np0
        Port vmbr0
            Interface vmbr0
                type: internal
        Port eth1
            tag: 3564
            Interface eth1
    ovs_version: "3.1.0"

Virtuaalse arvuti jaoks sobib kasutada sellist pve seadistusfaili 

root@valgustaja1:~# cat /etc/pve/qemu-server/1102.conf 
agent: 1
bios: ovmf
boot: order=virtio0;ide2;net0
cores: 8
cpu: host
efidisk0: local-to-valgustaja-1-lvm-over-mdadm:vm-1102-disk-0,efitype=4m,pre-enrolled-keys=1,size=4M
ide2: none,media=cdrom
machine: q35
memory: 8192
meta: creation-qemu=9.0.0,ctime=1720472955
name: imre-ubuntu-2404-01
ostype: l26
rng0: source=/dev/urandom
scsihw: virtio-scsi-single
serial0: socket
smbios1: uuid=eff2a3c6-e3e6-4ccf-889b-33babc49c3fc
sockets: 1
tpmstate0: local-to-valgustaja-1-lvm-over-mdadm:vm-1102-disk-1,size=4M,version=v2.0
vga: virtio
virtio0: local-to-valgustaja-1-lvm-over-mdadm:vm-1102-disk-2,backup=0,iothread=1,size=20G
vmgenid: ec8bc8c2-1279-43d2-bfca-9d7b9081c97f
hostpci0: 0000:81:01.0,pcie=1,rombar=0

ja teisel virtuaalsel arvutil analoogselt kuid hostpci0 rida on 

hostpci0: 0000:81:01.1,pcie=1,rombar=0

Virtuaalses arvutis paistab võrk 

root@imre-ubuntu-2024-dpdk-01:~# ifconfig enp1s0
enp1s0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 193.40.135.66  netmask 255.255.255.240  broadcast 193.40.135.79
        inet6 fe80::2c38:4dff:fe3d:61ed  prefixlen 64  scopeid 0x20<link>
        ether 2e:38:4d:3d:61:ed  txqueuelen 1000  (Ethernet)
        RX packets 753563383  bytes 1076089573005 (1.0 TB)
        RX errors 0  dropped 85139  overruns 0  frame 0
        TX packets 50662841  bytes 3084593575 (3.0 GB)
        TX errors 138  dropped 0 overruns 0  carrier 0  collisions 0

kus

  • mac aadress vastab eelpool seadistatud mac aadressile

Võrguliidestega seotud draiverite kasutus on selline, PVE host peal 

root@valgustaja1:~# driverctl list-devices network
0000:81:00.0 ice
0000:81:00.1 ice
0000:81:01.0 vfio-pci
0000:81:01.1 vfio-pci

virtuaalses arvutis 

root@imre-ubuntu-2024-dpdk-01:~# lspci | grep -i ethern
01:00.0 Ethernet controller: Intel Corporation Ethernet Adaptive Virtual Function (rev 02)

root@imre-ubuntu-2024-dpdk-01:~# driverctl list-devices network
0000:01:00.0 iavf

root@imre-ubuntu-2024-dpdk-01:~# ethtool -i enp1s0
driver: iavf
version: 6.8.0-38-generic
firmware-version: N/A
expansion-rom-version: 
bus-info: 0000:01:00.0
supports-statistics: yes
supports-test: no
supports-eeprom-access: no
supports-register-dump: no
supports-priv-flags: yes

root@imre-ubuntu-2024-dpdk-01:~# ethtool enp1s0
Settings for enp1s0:
        Supported ports: [  ]
        Supported link modes:   Not reported
        Supported pause frame use: No
        Supports auto-negotiation: No
        Supported FEC modes: Not reported
        Advertised link modes:  Not reported
        Advertised pause frame use: No
        Advertised auto-negotiation: No
        Advertised FEC modes: Not reported
        Speed: 25000Mb/s
        Duplex: Full
        Auto-negotiation: off
        Port: None
        PHYAD: 0
        Transceiver: internal
        Current message level: 0x00000007 (7)
                               drv probe link
        Link detected: yes

Kasulikud lisamaterjalid

Koormustestimine - vhost user lahendus

Koormustestimise võrgujoonis

  • valgustaja1 - 10.40.134.18 - füüsiline pve node/host arvuti (25 Gbit/s)
  • ubuntu-2404-01 - 10.40.135.66 - virtuaalne arvuti
  • ubuntu-2404-02 - 10.40.135.67 - virtuaalne arvuti
  • ubuntu-2404-03 - 10.40.135.68 - virtuaalne arvuti
  • gen-1 - 10.40.13.242 - füüsiline arvuti (25 Gbit/s)
  • gen-2 - 10.40.13.246 - füüsiline arvuti (25 Gbit/s)

syn flood

Kolmes virtuaalses arvutis ei käivitata midagi spetsiaalselt, lihtsalt paketifilter ei takista vms. Syn paketile vastatakse rst paketiga.

gen-1 arvutis käivitatakse kaheksa protsessi (24 on random tühi port) 

# cat run-hping3-to-66.sh 
timeout 60 hping3 -S -c 400000000 --flood -p 24 10.40.135.66 -m 200 &
timeout 60 hping3 -S -c 400000000 --flood -p 24 10.40.135.66 -m 200 &
timeout 60 hping3 -S -c 400000000 --flood -p 24 10.40.135.66 -m 200 &
timeout 60 hping3 -S -c 400000000 --flood -p 24 10.40.135.66 -m 200 &
timeout 60 hping3 -S -c 400000000 --flood -p 24 10.40.135.66 -m 200 &
timeout 60 hping3 -S -c 400000000 --flood -p 24 10.40.135.66 -m 200 &
timeout 60 hping3 -S -c 400000000 --flood -p 24 10.40.135.66 -m 200 &
timeout 60 hping3 -S -c 400000000 --flood -p 24 10.40.135.66 -m 200 &

ning ka analoogne 'run-hping3-to-67.sh'.

gen-2 arvutis käivitakse analoone 'run-hping3-to-68.sh'.

vnstat abil vaadeldes paistab

  • üks hping3 protsess tekitab 200 kpps sekundis väljuvat liiklust (ootus oleks et tekib rohkem)
  • ühe hping3 protsessi tagasihoidlikku väljndit kompenseeritakse mitme hping3 protsessi samaaegse käivitamisega (üks 8 protsessi komplekt tekitab nii 1200 kpps)
  • tulemusena tekitatakse kokku gen-1 ja gen-2 peal väljuvat liiklust ca 3 x 1200 = 3.6 mpps
  • see liiklus jõuab virtuaalsetele arvutite koplekti juurde kohale 'vnstat -l -i enp0s2' abil hinnates, seejuures on virtuaalsed arvutid cpu mõttes väga koormatud

Virtuaalsete arvutite jõudlust määrab protsessorite arv (8) ning nendega peab olema kooskõlas qemu virtuaalse arvuti seadistus 

cores: 8
memory: 8192
numa: 1
sockets: 1
vcpus: 8

ja ovs port seadistus eriti rxq osas, ühe arvuti puhul peab see olema 8, kolme puhul ehk 3 x 8, peab uurima 

# ovs-vsctl show
...
        Port dpdk-p0
            Interface dpdk-p0
                type: dpdk
                options: {dpdk-devargs="0000:81:00.0", n_rxq="16"}

Tulemusena peavad saama kõik protsessorid virtuaalses arvutis nn interrupt load'i (vaadata top + 1 abil, ja top + H abil). Ja PVE host peal võiks ka kaheksa CPU PMD 100% koormus nihkuda 'us' pealt 'sy' peale.

iperf3

Kolmes virtuaalses arvutis on kävitatud 'iperf3 -s' serverid.

gen-1 arvutis käivitatakse 

gen-1# iperf3 -t 180 -c 10.40.135.66
gen-1# iperf3 -t 180 -c 10.40.135.67

gen-2 arvutis käivitatakse 

gen-2# iperf3 -t 180 -c 10.40.135.68

Taustal jälgitakse võrguliidesel vnstat abil väljuva liikluse statistikat 

gen-1# vnstat -l -i enp129s0f0
gen-2# vnstat -l -i enp129s0f0

Tulemusena saavutab iga ühendus nii 7-11 Gbit/s. Samal ajal virtuaalsed iperf3 serverid ei ole os mõttes koormatud, interrupt load on seotud ühe cpu'ga (ju see on iperf3 töötamist või kasutamise eripära).

Koormustestimine - tava lahendus

Võrgunduse setup on sama, testid on samad. Muudatus seisneb selle, et ovs töötab non-dpdk ja non-vhost-user-protokoll režiimis.

syn flood

Kolmes virtuaalses arvutis ei käivitata midagi spetsiaalselt, lihtsalt paketifilter ei takista vms. Syn paketile vastatakse rst paketiga.

gen-1 arvutis käivitatakse kaheksa protsessi (24 on random tühi port) 

# cat run-hping3-to-66.sh 
timeout 60 hping3 -S -c 400000000 --flood -p 24 10.40.135.66 -m 200 &
timeout 60 hping3 -S -c 400000000 --flood -p 24 10.40.135.66 -m 200 &
timeout 60 hping3 -S -c 400000000 --flood -p 24 10.40.135.66 -m 200 &
timeout 60 hping3 -S -c 400000000 --flood -p 24 10.40.135.66 -m 200 &
timeout 60 hping3 -S -c 400000000 --flood -p 24 10.40.135.66 -m 200 &
timeout 60 hping3 -S -c 400000000 --flood -p 24 10.40.135.66 -m 200 &
timeout 60 hping3 -S -c 400000000 --flood -p 24 10.40.135.66 -m 200 &
timeout 60 hping3 -S -c 400000000 --flood -p 24 10.40.135.66 -m 200 &

Virtuaalsete arvutite jõudlust määrab protsessorite arv (nt 8) ja oluline on sisse lülidada multi-queue, nt samuti väärtusega 8 (tundub, et tingimata need väärtused ei pea langema kokku) 

cores: 8
memory: 8192
sockets: 1
..
net0: virtio=BC:24:11:93:F5:42,bridge=vmbr0,firewall=1,tag=3564,queues=8

ja ovs seadistus on nö tavaline 

root@valgustaja1:~# ovs-vsctl show
3dddee67-72e2-4b2a-8e1d-9ebe6b0bbb3f
    Bridge vmbr0
        Port fwln1102o0
            tag: 3564
            Interface fwln1102o0
                type: internal
        Port enp129s0f0np0
            Interface enp129s0f0np0
        Port vmbr0
            Interface vmbr0
                type: internal
        Port fwln1103o0
            tag: 3564
            Interface fwln1103o0
                type: internal
    ovs_version: "3.1.0"

Tulemusena

  • TODO

iperf3

TODO

Tulemusena

  • üks iperf3 klient protsess saavutab ühe selliselt seadistatud iperf3 serveriga suheldes kiiruse 20 Gbit/s
  • kui multiqueue välja lülitada, siis üks iperf3 klient protsess saavutab ühe selliselt seadistatud iperf3 serveriga suheldes kiiruse 15 Gbit/s
  • pve host ega pve guest nö tava-cpu-load ei ole märkimisväärne (nö visuaalselt palju parem kui dpdk puhul, nt top programmi väljundis pressides klahv '1' ja klahv 'shift + h')

Probleemid

Probleem tekib siis kui füüsilisele võrgukaardile vastav librte teek on paigaldamata, logis on siis 

valgustaja1# less /var/log/openvswitch/ovs-vswitchd.log
...
2024-07-09T00:26:12.303Z|00052|dpdk|ERR|EAL: Driver cannot attach the device (0000:81:00.0)
2024-07-09T00:26:12.303Z|00053|dpdk|ERR|EAL: Failed to attach device on primary process
2024-07-09T00:26:12.303Z|00054|netdev_dpdk|WARN|Error attaching device '0000:81:00.0' to DPDK
2024-07-09T00:26:12.303Z|00055|netdev|WARN|dpdk-p0: could not set configuration (Invalid argument)
2024-07-09T00:26:12.303Z|00056|dpdk|ERR|Invalid port_id=32

ning 

root@valgustaja1# cat ovs-vsctl-show-katki 
e3c33e5f-ba41-45e8-b0af-f7310a63f5ce
    Bridge vmbr0
        Port dpdk-p0
            Interface dpdk-p0
                type: dpdk
                options: {dpdk-devargs="0000:81:00.0"}
                error: "Error attaching device '0000:81:00.0' to DPDK"
...

Mõisted

  • epct - ethernet port configuration tool

Riistvara seadistamine

arvuti BIOS

TODO

HII menüü

TODO

devlink utiliit

TODO

epct utiliit - os käsurida

epct võiks olla väga asjakohane tööriist, aga 2024 aasta kevadel ta praktiliselt eriti ei tööta, ei linux kernel v 6.x ega v. 5.x puhul, https://www.intel.com/content/www/us/en/download/19437/ethernet-port-configuration-tool-linux.html

kui ice draiver on laaditud (kasutatakse kernel native ice draiverit, analoogne tulemus on epct v1.41.03.01) 

# ./epct64e -devices
Ethernet Port Configuration Tool
EPCT version: v1.40.05.05
Copyright 2019 - 2023 Intel Corporation.

Cannot initialize port: [00:129:00:00] Intel(R) Ethernet Controller E810-XXV for SFP
Cannot initialize port: [00:129:00:01] Intel(R) Ethernet Controller E810-XXV for SFP

Error: Cannot initialize adapter.

kui ice draiver ei ole laaditud 

# ./epct64e -devices
Ethernet Port Configuration Tool
EPCT version: v1.40.05.05
Copyright 2019 - 2023 Intel Corporation.

Base driver not supported or not present: [00:129:00:00] Intel(R) Ethernet Controller E810-XXV for SFP
NIC Seg:Bus:Fun   Ven-Dev   Connector Ports Speed    Quads  Lanes per PF
=== ============= ========= ========= ===== ======== ====== ============
 1) 000:129:00-01 8086-159B SFP       2     -   Gbps N/A    N/A

Error: Base driver is not available for one or more adapters. Please ensure the driver is correctly attached to the device.

epct utiliit - efi rakendus

epct efi rakendus natuke töötab, aga ei võimalda siis 'svio enable' teha, https://www.intel.com/content/www/us/en/download/19440/ethernet-port-configuration-tool-efi.html

20240502-epct-e810-01.png

nvmeupdate efi rakendus iseenesest ei anna viga, aga ei saa ka aru, et süsteemis oleks e810 kaart, https://www.intel.com/content/www/us/en/download/19629/non-volatile-memory-nvm-update-utility-for-intel-ethernet-network-adapters-e810-series-efi.html

20240502-nvmeupdate-e810-02.png

Misc

Kasutada on üks füüsiline kahe pordiga võrgukaart 

# lspci | grep -i net
81:00.0 Ethernet controller: Intel Corporation Ethernet Controller E810-XXV for SFP (rev 02)
81:00.1 Ethernet controller: Intel Corporation Ethernet Controller E810-XXV for SFP (rev 02)

Operatsioonisüsteemi tavalised võrguseadmed on sellised 

root@pve-02:~# ethtool enp129s0f1np1
Settings for enp129s0f1np1:
        Supported ports: [ FIBRE ]
        Supported link modes:   1000baseT/Full
                                25000baseCR/Full
                                25000baseSR/Full
                                1000baseX/Full
                                10000baseCR/Full
                                10000baseSR/Full
                                10000baseLR/Full
        Supported pause frame use: Symmetric
        Supports auto-negotiation: Yes
        Supported FEC modes: None        RS      BASER
        Advertised link modes:  25000baseCR/Full
                                10000baseCR/Full
        Advertised pause frame use: No
        Advertised auto-negotiation: Yes
        Advertised FEC modes: None       RS      BASER
        Link partner advertised link modes:  Not reported
        Link partner advertised pause frame use: No
        Link partner advertised auto-negotiation: Yes
        Link partner advertised FEC modes: Not reported
        Speed: 25000Mb/s
        Duplex: Full
        Auto-negotiation: on
        Port: Direct Attach Copper
        PHYAD: 0
        Transceiver: internal
        Supports Wake-on: g
        Wake-on: d
        Current message level: 0x00000007 (7)
                               drv probe link
        Link detected: yes


root@pve-02:~# ethtool -i enp129s0f1np1
driver: ice
version: 6.5.13-5-pve
firmware-version: 4.40 0x8001c7d4 1.3534.0
expansion-rom-version: 
bus-info: 0000:81:00.1
supports-statistics: yes
supports-test: yes
supports-eeprom-access: yes
supports-register-dump: yes
supports-priv-flags: yes

Paistab devlink vaatest sedasi 

# devlink dev info
pci/0000:81:00.0:
  driver ice
  serial_number 00-01-00-ff-ff-00-00-00
  versions:
      fixed:
        board.id K58132-000
      running:
        fw.mgmt 7.4.13
        fw.mgmt.api 1.7.11
        fw.mgmt.build 0xded4446f
        fw.undi 1.3534.0
        fw.psid.api 4.40
        fw.bundle_id 0x8001c7d4
        fw.app.name ICE OS Default Package
        fw.app 1.3.36.0
        fw.app.bundle_id 0xc0000001
        fw.netlist 4.4.5000-2.15.0
        fw.netlist.build 0x0ba411b9
      stored:
        fw.undi 1.3534.0
        fw.psid.api 4.40
        fw.bundle_id 0x8001c7d4
        fw.netlist 4.4.5000-2.15.0
        fw.netlist.build 0x0ba411b9

...

RoCEv2 kasutamine

Oluline on, et see ip konf millega opereeritakse järgnevalt oleks kinnitatud füüsilise seadme külge (st mitte nii, et arvutis on kasutusel nt OVS virtual switch ning ip on vlan47 küljes, sama ovs bridge küljes on füüsiline enp129s0f1np1 jne, st siis ei toimi) 

root@pve-02:~# ip addr show dev enp129s0f1np1:
3: enp129s0f1np1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
    link/ether 3c:ec:ef:e6:69:b9 brd ff:ff:ff:ff:ff:ff
    inet 10.47.218.226/24 scope global enp129s0f1np1
       valid_lft forever preferred_lft forever
    inet6 fe80::3eec:efff:fee6:69b9/64 scope link 
       valid_lft forever preferred_lft forever


Muu hulgas toetab see seade iwarp ja rocev2 protokolle, devlink vaatest paistab see nii 

# devlink dev param 
pci/0000:81:00.0:
  name enable_roce type generic
    values:
      cmode runtime value true
  name enable_iwarp type generic
    values:
      cmode runtime value false
pci/0000:81:00.1:
  name enable_roce type generic
    values:
      cmode runtime value false
  name enable_iwarp type generic
    values:
      cmode runtime value true

Korraga saab olla aktiivne üks või teine, nende vahel valmine toimub nt selliselt devlink abil 

# devlink dev param set pci/0000:81:00.1 name enable_iwarp value false cmode runtime

rocev2 kasutamiseks on asjakohen süsteemidesse paigaldada omajagu rdma ja infiniband traditsiooniga tarkvara, nt 

# apt-get install rdma-core
# apt-get install perftest
# apt-get install ibverbs-utils
# apt-get install infiniband-diags
# apt-get install ibverbs-providers

Asjasse puutuvad sellised driverid

  • ice - põhi draiver
  • irdma - intel võrgukaartide (2024 aastal e810 ja midagi vanemat ka) - 'intel rdma'

Seadmed kui rdma seadmed paistavad 

root@pve-01:~# rdma link
link rocep129s0f0/1 state ACTIVE physical_state LINK_UP netdev enp129s0f0np0 
link rocep129s0f1/1 state ACTIVE physical_state LINK_UP netdev enp129s0f1np1

Kahe otse kaabliga süsteemi uurimiseks sobib öelda ühes ja teises arvutis nt nii, pve-02 on nö rping server ja pve-01 on rping klient; seejuures on iseloomulik, et tavalise võrguliidese peal tavalisel viisil võrku pealt kuulates ei ole midagi näha 

root@pve-02:~# rping -s -a 10.47.218.226 -v
server ping data: rdma-ping-0: ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqr
server ping data: rdma-ping-1: BCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrs
server ping data: rdma-ping-2: CDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrst
server ping data: rdma-ping-3: DEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstu
server ping data: rdma-ping-4: EFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuv
server DISCONNECT EVENT...
wait for RDMA_READ_ADV state 10

root@pve-01:~# rping -c -a 10.47.218.226 -v -C 5
ping data: rdma-ping-0: ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqr
ping data: rdma-ping-1: BCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrs
ping data: rdma-ping-2: CDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrst
ping data: rdma-ping-3: DEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstu
ping data: rdma-ping-4: EFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuv
client DISCONNECT EVENT...

Veel huvitavaid utiliite, seejuures on esimene seade 'devlink dev param ...' abil seadistatud rocev2 režiimi ja teine iwarp režiimi 

# ibv_devices 
    device                 node GUID
    ------              ----------------
    rocep129s0f0        3eeceffffee667b2
    iwp129s0f1          3eeceffffee667b3


# ibv_devinfo 
hca_id: rocep129s0f0
        transport:                      InfiniBand (0)
        fw_ver:                         1.71
        node_guid:                      3eec:efff:fee6:67b2
        sys_image_guid:                 3eec:efff:fee6:67b2
        vendor_id:                      0x8086
        vendor_part_id:                 5531
        hw_ver:                         0x2
        phys_port_cnt:                  1
                port:   1
                        state:                  PORT_ACTIVE (4)
                        max_mtu:                4096 (5)
                        active_mtu:             1024 (3)
                        sm_lid:                 0
                        port_lid:               1
                        port_lmc:               0x00
                        link_layer:             Ethernet

hca_id: iwp129s0f1
        transport:                      iWARP (1)
        fw_ver:                         1.71
        node_guid:                      3eec:efff:fee6:67b3
        sys_image_guid:                 3eec:efff:fee6:67b3
        vendor_id:                      0x8086
        vendor_part_id:                 5531
        hw_ver:                         0x2
        phys_port_cnt:                  1
                port:   1
                        state:                  PORT_ACTIVE (4)
                        max_mtu:                4096 (5)
                        active_mtu:             1024 (3)
                        sm_lid:                 0
                        port_lid:               1
                        port_lmc:               0x00
                        link_layer:             Ethernet

Töötaval juhul roce seadmega 

root@pve-02:~# ib_send_bw -i 1 -d rocep129s0f1

************************************
* Waiting for client to connect... *
************************************
---------------------------------------------------------------------------------------
                    Send BW Test
 Dual-port       : OFF          Device         : rocep129s0f1
 Number of qps   : 1            Transport type : IB
 Connection type : RC           Using SRQ      : OFF
 PCIe relax order: ON
 ibv_wr* API     : OFF
 RX depth        : 512
 CQ Moderation   : 1
 Mtu             : 1024[B]
 Link type       : Ethernet
 GID index       : 1
 Max inline data : 0[B]
 rdma_cm QPs     : OFF
 Data ex. method : Ethernet
---------------------------------------------------------------------------------------
 local address: LID 0x01 QPN 0x0004 PSN 0x807cd5
 GID: 00:00:00:00:00:00:00:00:00:00:255:255:10:47:218:226
 remote address: LID 0x01 QPN 0x0004 PSN 0xba4fee
 GID: 00:00:00:00:00:00:00:00:00:00:255:255:10:47:218:225
---------------------------------------------------------------------------------------
 #bytes     #iterations    BW peak[MB/sec]    BW average[MB/sec]   MsgRate[Mpps]
Conflicting CPU frequency values detected: 3696.643000 != 3000.000000. CPU Frequency is not max.
 65536      1000             0.00               2762.05            0.044193
---------------------------------------------------------------------------------------

ja esimene arvuti kliendina 

root@pve-01:~# ib_send_bw -i 1 10.47.218.226 -d rocep129s0f1
---------------------------------------------------------------------------------------
                    Send BW Test
 Dual-port       : OFF          Device         : rocep129s0f1
 Number of qps   : 1            Transport type : IB
 Connection type : RC           Using SRQ      : OFF
 PCIe relax order: ON
 ibv_wr* API     : OFF
 TX depth        : 128
 CQ Moderation   : 1
 Mtu             : 1024[B]
 Link type       : Ethernet
 GID index       : 1
 Max inline data : 0[B]
 rdma_cm QPs     : OFF
 Data ex. method : Ethernet
---------------------------------------------------------------------------------------
 local address: LID 0x01 QPN 0x0004 PSN 0xba4fee
 GID: 00:00:00:00:00:00:00:00:00:00:255:255:10:47:218:225
 remote address: LID 0x01 QPN 0x0004 PSN 0x807cd5
 GID: 00:00:00:00:00:00:00:00:00:00:255:255:10:47:218:226
---------------------------------------------------------------------------------------
 #bytes     #iterations    BW peak[MB/sec]    BW average[MB/sec]   MsgRate[Mpps]
Conflicting CPU frequency values detected: 3698.021000 != 3000.000000. CPU Frequency is not max.
 65536      1000             2757.88            2757.84            0.044126
---------------------------------------------------------------------------------------

kus

  • tundub, et ib_send_bw on infiniband põlvnevusega utiliit
  • Transport type on IB ehk infiniband, st nii nagu roce protokolli tööpõhimõte on
  • Link type on ethernet

Mittetöötav juhum - kuna kasutatakse iwarp seadmel 

root@pve-02:~# ib_send_bw -i 1 -d iwp129s0f1

************************************
* Waiting for client to connect... *
************************************
---------------------------------------------------------------------------------------
                    Send BW Test
 Dual-port       : OFF          Device         : iwp129s0f1
 Number of qps   : 1            Transport type : IW
 Connection type : RC           Using SRQ      : OFF
 PCIe relax order: ON
 ibv_wr* API     : OFF
 RX depth        : 512
 CQ Moderation   : 1
 Mtu             : 1024[B]
 Link type       : Ethernet
 GID index       : 0
 Max inline data : 0[B]
 rdma_cm QPs     : OFF
 Data ex. method : Ethernet
---------------------------------------------------------------------------------------
ethernet_read_keys: Couldn't read remote address
 Unable to read to socket/rdma_cm
Failed to exchange data between server and clients
Failed to deallocate PD - Device or resource busy
Failed to destroy resources

Mittetöötav juhtum - kuna seade on küll arvutis olemas, aga seal ei ole kinnitatud kõnealust ip aadressi 

root@pve-02:~# ib_send_bw -i 1 -d rocep129s0f0 

************************************
* Waiting for client to connect... *
************************************
---------------------------------------------------------------------------------------
                    Send BW Test
 Dual-port       : OFF          Device         : rocep129s0f0
 Number of qps   : 1            Transport type : IB
 Connection type : RC           Using SRQ      : OFF
 PCIe relax order: ON
 ibv_wr* API     : OFF
 RX depth        : 512
 CQ Moderation   : 1
 Mtu             : 1024[B]
 Link type       : Ethernet
 GID index       : 0
 Max inline data : 0[B]
 rdma_cm QPs     : OFF
 Data ex. method : Ethernet
---------------------------------------------------------------------------------------
Failed to modify QP 5 to RTR
 Unable to Connect the HCA's through the link

Kõige praktilisem kasutusjuht on iscsi kasutamine iser + rocev2 viisil. Tulemusena on andmevahetuse kiirus 2x suurem võrreldes nö tavalisega. Target näeb välja selline 

/> ls /
o- / ......................................................................................................................... [...]
  o- backstores .............................................................................................................. [...]
  | o- block .................................................................................................. [Storage Objects: 1]
  | | o- iscsi_block_md127 ............................................................. [/dev/md127 (27.9TiB) write-thru activated]
  | |   o- alua ................................................................................................... [ALUA Groups: 1]
  | |     o- default_tg_pt_gp ....................................................................... [ALUA state: Active/optimized]
  | o- fileio ................................................................................................. [Storage Objects: 0]
  | o- pscsi .................................................................................................. [Storage Objects: 0]
  | o- ramdisk ................................................................................................ [Storage Objects: 0]
  o- iscsi ............................................................................................................ [Targets: 1]
  | o- iqn.2003-01.org.setup.lun.test .................................................................................... [TPGs: 1]
  |   o- tpg1 .......................................................................................... [no-gen-acls, auth per-acl]
  |     o- acls .......................................................................................................... [ACLs: 1]
  |     | o- iqn.1993-08.org.debian:01:b65e1ba35869 ................................................... [1-way auth, Mapped LUNs: 1]
  |     |   o- mapped_lun0 ..................................................................... [lun0 block/iscsi_block_md127 (rw)]
  |     o- luns .......................................................................................................... [LUNs: 1]
  |     | o- lun0 ........................................................ [block/iscsi_block_md127 (/dev/md127) (default_tg_pt_gp)]
  |     o- portals .................................................................................................... [Portals: 1]
  |       o- 10.47.218.226:3261 ............................................................................................. [iser]
  o- loopback ......................................................................................................... [Targets: 0]
  o- srpt ............................................................................................................. [Targets: 0]
  o- vhost ............................................................................................................ [Targets: 0]
  o- xen-pvscsi ....................................................................................................... [Targets: 0]

ning initiator 

root@pve-01:~# iscsiadm -m discovery -t st -p 10.47.218.226:3261
root@pve-01:~# iscsiadm -m node -T iqn.2003-01.org.setup.lun.test -p 10.47.218.226:3261 -o update -n iface.transport_name -v iser
root@pve-01:~# iscsiadm -m node -T iqn.2003-01.org.setup.lun.test -p 10.47.218.226:3261 -l
root@pve-01:~# lsscsi -s
...

root@pve-01:~# iscsiadm -m node -T iqn.2003-01.org.setup.lun.test -p 10.47.218.226:3261 -u
root@pve-01:~# iscsiadm -m discoverydb -t sendtargets -p 10.47.218.226:3261 -o delete
root@pve-01:~# iscsiadm -m discoverydb

Scalable Functions

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