Hello Isaac, Described network topology, SPDK and VPP setup looks correct to me. When error you are receiving is seen only on management messages like login this should be fine. It is generated when iscsi_tgt server receives TCP Reset during read. It happens on both posix and vpp net implementations on SPDK. What happens is iscsiadm sending RST instead of closing the connection after sending iSCSI login command to quickly end the TCP connection. A quick way to verify that, is to use "sudo tcpdump -i interface_name -nn 'tcp[13] & 4!=0'" on machine when iscsiadm login is used. This will display all packets with TCP RST. If this message occured during normal data transfer, then it might signify some issue with either connection or setup. Probably the log level of this message should be lowered to NOTICE and text enhanced. Thanks, Tomek From: Isaac Otsiabah [mailto:[email protected]] Sent: Thursday, April 26, 2018 8:22 PM To: Zawadzki, Tomasz <tomasz.zawadzki(a)intel.com&gt;; &#39;spdk(a)lists.01.org&#39; <spdk(a)lists.01.org&gt; Cc: Edward Yang <eyang(a)us.fujitsu.com&gt; Subject: RE: SPDK ( app/iscsi_tgt/iscsi_tgt ) with VPP testing; Made progress but we have errors Tomasz, Edward (my co-worker) and i configured vpp on the same network topology as in my previous message. From the server, after starting the iscsi_tgt server, we executed RPC commands to set up the portal, add initiator, configure nvme bdev, construct_lvol_bdev and constructed a target node. However, the server error I sent on Monday still appears (in red). Any idea why we still get the error message (conn.c: 736:spdk_iscsi_conn_read_data: *ERROR*: spdk_sock_recv() failed, errno 104: Connection reset by peer) from iscsi_tgt server? is our vpp configuration correct? Thank you. (On Server-192.168.2.10): [[email protected] spdk]# vppctl _______ _ _ _____ ___ __/ __/ _ \ (_)__ | | / / _ \/ _ \ _/ _// // / / / _ \ | |/ / ___/ ___/ /_/ /____(_)_/\___/ |___/_/ /_/ vpp# show int Name Idx State Counter Count TenGigabitEthernet82/0/0 1 up rx packets 1863376 rx bytes 2744564878 tx packets 1874613 tx bytes 139636606 drops 4272 punts 4 ip4 1863210 ip6 10 local0 0 down vpp# show int address TenGigabitEthernet82/0/0 (up): 192.168.2.10/24 local0 (dn): vpp# [[email protected] spdk]# ./app/iscsi_tgt/iscsi_tgt -m 0x0101 Starting SPDK v18.04-pre / DPDK 18.02.0 initialization... [ DPDK EAL parameters: iscsi -c 0x0101 --file-prefix=spdk_pid14476 ] EAL: Detected 16 lcore(s) EAL: No free hugepages reported in hugepages-1048576kB EAL: Multi-process socket /var/run/.spdk_pid14476_unix EAL: Probing VFIO support... EAL: VFIO support initialized app.c: 443:spdk_app_start: *NOTICE*: Total cores available: 2 reactor.c: 650:spdk_reactors_init: *NOTICE*: Occupied cpu socket mask is 0x3 reactor.c: 434:_spdk_reactor_run: *NOTICE*: Reactor started on core 8 on socket 1 reactor.c: 434:_spdk_reactor_run: *NOTICE*: Reactor started on core 0 on socket 0 EAL: PCI device 0000:04:00.0 on NUMA socket 0 EAL: probe driver: 8086:953 spdk_nvme EAL: using IOMMU type 1 (Type 1) lvol.c:1051:_spdk_lvs_verify_lvol_name: *ERROR*: lvol with name lbd_0 already exists conn.c: 323:spdk_iscsi_conn_construct: *NOTICE*: Launching connection on acceptor thread iscsi.c:2090:spdk_iscsi_op_login_notify_session_info: *NOTICE*: Login(discovery) from iqn.1994-05.com.redhat:92bdee055ba (192.168.2.20) on (192.168.2.10:3260,1), ISID=23d000000, TSIH=1, CID=0, HeaderDigest=off, DataDigest=off conn.c: 736:spdk_iscsi_conn_read_data: *ERROR*: spdk_sock_recv() failed, errno 104: Connection reset by peer conn.c: 455:spdk_iscsi_remove_conn: *NOTICE*: Terminating connections(tsih 1): 0 conn.c: 323:spdk_iscsi_conn_construct: *NOTICE*: Launching connection on acceptor thread iscsi.c:2078:spdk_iscsi_op_login_notify_session_info: *NOTICE*: Login from iqn.1994-05.com.redhat:92bdee055ba (192.168.2.20) on iqn.2016-06.io.spdk:Target0 tgt_node-1 (192.168.2.10:3260,1), ISID=23d000007, TSIH=2, CID=0, HeaderDigest=off, DataDigest=off (On Client-192.168.2.10): [[email protected] ~]#iscsiadm -m discovery -t sendtargets -p 192.168.2.10 192.168.2.10:3260,1 iqn.2016-06.io.spdk:Target0 [[email protected] ~]#iscsiadm -m node --login Logging in to [iface: default, target: iqn.2016-06.io.spdk:Target0, portal: 192.168.2.10,3260] (multiple) Login to [iface: default, target: iqn.2016-06.io.spdk:Target0, portal: 192.168.2.10,3260] successful. [[email protected] ~]# [[email protected] ~]# ls -l /dev/sd* brw-rw---- 1 root disk 8, 0 Apr 25 15:03 /dev/sda brw-rw---- 1 root disk 8, 1 Apr 25 15:03 /dev/sda1 brw-rw---- 1 root disk 8, 2 Apr 25 15:03 /dev/sda2 brw-rw---- 1 root disk 8, 3 Apr 25 15:03 /dev/sda3 brw-rw---- 1 root disk 8, 16 Apr 25 15:03 /dev/sdb brw-rw---- 1 root disk 8, 32 Apr 25 15:03 /dev/sdc brw-rw---- 1 root disk 8, 48 Apr 25 15:03 /dev/sdd brw-rw---- 1 root disk 8, 49 Apr 25 15:03 /dev/sdd1 brw-rw---- 1 root disk 8, 64 Apr 25 15:03 /dev/sde brw-rw---- 1 root disk 8, 80 Apr 25 15:03 /dev/sdf brw-rw---- 1 root disk 8, 96 Apr 25 15:03 /dev/sdg brw-rw---- 1 root disk 8, 112 Apr 25 15:03 /dev/sdh brw-rw---- 1 root disk 8, 128 Apr 25 15:03 /dev/sdi brw-rw---- 1 root disk 8, 144 Apr 25 15:03 /dev/sdj brw-rw---- 1 root disk 8, 160 Apr 25 15:03 /dev/sdk brw-rw---- 1 root disk 8, 176 Apr 25 15:03 /dev/sdl brw-rw---- 1 root disk 8, 192 Apr 25 15:03 /dev/sdm brw-rw---- 1 root disk 8, 208 Apr 25 15:03 /dev/sdn brw-rw---- 1 root disk 8, 224 Apr 25 15:03 /dev/sdo brw-rw---- 1 root disk 8, 240 Apr 25 19:17 /dev/sdp Isaac From: Isaac Otsiabah Sent: Monday, April 23, 2018 4:43 PM To: 'Zawadzki, Tomasz' <[email protected]<mailto:[email protected]>>; &#39;spdk(a)lists.01.org&#39; <[email protected]<mailto:[email protected]>> Subject: SPDK ( app/iscsi_tgt/iscsi_tgt ) with VPP testing; Made progress but we have errors Tomasz, Edward and I have been working on this again today. We did not create any veth nor tap device. Instead in vppctl we set the 10G interface to 192.168.2.10/10 and then upped the interface as shown below. (On Server): [email protected] ~]# vppctl _______ _ _ _____ ___ __/ __/ _ \ (_)__ | | / / _ \/ _ \ _/ _// // / / / _ \ | |/ / ___/ ___/ /_/ /____(_)_/\___/ |___/_/ /_/ vpp# show int addr TenGigabitEthernet82/0/0 (up): 192.168.2.10/24 local0 (dn): The client ip address is 192.168.2.20 The we started the iscsi_tgt server and executed the commands below. python /root/spdk_vpp/spdk/scripts/rpc.py add_portal_group 1 192.168.2.10:3260 python /root/spdk_vpp/spdk/scripts/rpc.py add_initiator_group 2 ANY 192.168.2.20/24 python /root/spdk_vpp/spdk/scripts/rpc.py construct_malloc_bdev -b MyBdev 64 512 python /root/spdk_vpp/spdk/scripts/rpc.py construct_target_node Target3 Target3_alias MyBdev:0 1:2 64 We got these errors from iscsi_tgt server (as shown below). conn.c: 323:spdk_iscsi_conn_construct: *NOTICE*: Launching connection on acceptor thread iscsi.c:2090:spdk_iscsi_op_login_notify_session_info: *NOTICE*: Login(discovery) from iqn.1994-05.com.redhat:92bdee055ba (192.168.2.20) on (192.168.2.10:3260,1), ISID=23d000000, TSIH=1, CID=0, HeaderDigest=off, DataDigest=off conn.c: 736:spdk_iscsi_conn_read_data: *ERROR*: spdk_sock_recv() failed, errno 104: Connection reset by peer conn.c: 455:spdk_iscsi_remove_conn: *NOTICE*: Terminating connections(tsih 1): 0 conn.c: 323:spdk_iscsi_conn_construct: *NOTICE*: Launching connection on acceptor thread iscsi.c:2090:spdk_iscsi_op_login_notify_session_info: *NOTICE*: Login(discovery) from iqn.1994-05.com.redhat:92bdee055ba (192.168.2.20) on (192.168.2.10:3260,1), ISID=23d000000, TSIH=2, CID=0, HeaderDigest=off, DataDigest=off conn.c: 736:spdk_iscsi_conn_read_data: *ERROR*: spdk_sock_recv() failed, errno 104: Connection reset by peer conn.c: 455:spdk_iscsi_remove_conn: *NOTICE*: Terminating connections(tsih 2): 0 conn.c: 323:spdk_iscsi_conn_construct: *NOTICE*: Launching connection on acceptor thread iscsi.c:2078:spdk_iscsi_op_login_notify_session_info: *NOTICE*: Login from iqn.1994-05.com.redhat:92bdee055ba (192.168.2.20) on iqn.2016-06.io.spdk:Target3 tgt_node-1 (192.168.2.10:3260,1), ISID=23d000001, TSIH=3, CID=0, HeaderDigest=off, DataDigest=off iscsi.c:2601:spdk_iscsi_op_logout: *NOTICE*: Logout from iqn.1994-05.com.redhat:92bdee055ba (192.168.2.20) on iqn.2016-06.io.spdk:Target3 tgt_node-1 (192.168.2.10:3260,1), ISID=23d000001, TSIH=3, CID=0, HeaderDigest=off, DataDigest=off conn.c: 736:spdk_iscsi_conn_read_data: *ERROR*: spdk_sock_recv() failed, errno 104: Connection reset by peer conn.c: 455:spdk_iscsi_remove_conn: *NOTICE*: Terminating connections(tsih 3): 0 conn.c: 323:spdk_iscsi_conn_construct: *NOTICE*: Launching connection on acceptor thread iscsi.c:2078:spdk_iscsi_op_login_notify_session_info: *NOTICE*: Login from iqn.1994-05.com.redhat:92bdee055ba (192.168.2.20) on iqn.2016-06.io.spdk:Target3 tgt_node-1 (192.168.2.10:3260,1), ISID=23d000002, TSIH=4, CID=0, HeaderDigest=off, DataDigest=off (On client): However, we can see the iscsi devices from the client machine. Any suggestion on how to get rid of these errors? Were the above steps correct? Isaac/Edward From: Zawadzki, Tomasz [mailto:[email protected]] Sent: Tuesday, April 17, 2018 7:49 PM To: Isaac Otsiabah <[email protected]<mailto:[email protected]>>; &#39;spdk(a)lists.01.org&#39; <[email protected]<mailto:[email protected]>> Subject: RE: anyone ran the SPDK ( app/iscsi_tgt/iscsi_tgt ) with VPP? Hello Isaac, Thank you for all the detailed descriptions, it really helps to understand the steps you took. I see that you are working with two hosts and using network cards (TenGigabitEthernet82). Actually all you did in "STEP1" is enough for iscsi_tgt to listen on 192.168.2.20. "STEP2" is not required. Only thing left to do on target is to configure portal/initiator_group/target_node, described here<http://www.spdk.io/doc/iscsi.html#iscsi_rpc>. "Example: Tap interfaces on a single host" is describing situation when someone would like to try out VPP without using another host and "real" network cards. Same goes for veth interfaces used in scripts for per-patch tests - they are done on single host. Thinking back, there should be second example with exact setup that you have - two hosts using network cards. I will look into it. Thanks for all the feedback ! PS. Patch with VPP implementation is merged on master as of today, no need to cherry-pick anymore. Regards, Tomek From: Isaac Otsiabah [mailto:[email protected]] Sent: Wednesday, April 18, 2018 1:29 AM To: &#39;spdk(a)lists.01.org&#39; <[email protected]<mailto:[email protected]>>; Zawadzki, Tomasz <[email protected]<mailto:[email protected]>> Subject: RE: anyone ran the SPDK ( app/iscsi_tgt/iscsi_tgt ) with VPP? Hi Tomasz, after executing the commands from the paragraph Example: Tap interfaces on a single host in this link (http://www.spdk.io/doc/iscsi.html#vpp) document, when I ping vpp from the target Server i get a respond. [[email protected] ~]# vppctl _______ _ _ _____ ___ __/ __/ _ \ (_)__ | | / / _ \/ _ \ _/ _// // / / / _ \ | |/ / ___/ ___/ /_/ /____(_)_/\___/ |___/_/ /_/ vpp# tap connect tap0 tapcli-0 vpp# show interface Name Idx State Counter Count TenGigabitEthernet82/0/0 1 down local0 0 down tapcli-0 2 down drops 8 vpp# set interface state tapcli-0 up vpp# show interface Name Idx State Counter Count TenGigabitEthernet82/0/0 1 down local0 0 down tapcli-0 2 up drops 8 vpp# set interface ip address tapcli-0 192.168.2.20/24 vpp# show int addr TenGigabitEthernet82/0/0 (dn): local0 (dn): tapcli-0 (up): 192.168.2.20/24 ip addr add 192.168.2.202/24 dev tap0 ip link set tap0 up /* pinging vpp from target Server */ [[email protected] ~]# ping -c 2 192.168.2.20 PING 192.168.2.20 (192.168.2.20) 56(84) bytes of data. 64 bytes from 192.168.2.20: icmp_seq=1 ttl=64 time=0.129 ms 64 bytes from 192.168.2.20: icmp_seq=2 ttl=64 time=0.116 ms My question is, what about the 10G interface as shown above "TenGigabitEthernet82/0/0 1 down"? The document does not say anything about it. Shouldn't I set ip address for it and up it? Isaac From: SPDK [mailto:[email protected]] On Behalf Of Isaac Otsiabah Sent: Tuesday, April 17, 2018 11:46 AM To: 'Zawadzki, Tomasz' <[email protected]<mailto:[email protected]>>; &#39;spdk(a)lists.01.org&#39; <[email protected]<mailto:[email protected]>> Cc: Paul Von-Stamwitz <[email protected]<mailto:[email protected]>> Subject: Re: [SPDK] anyone ran the SPDK ( app/iscsi_tgt/iscsi_tgt ) with VPP? Hi Tomasz, I got the SPDK patch. My network topology is simple but making the network ip address accessible to the iscsi_tgt application and to vpp is not working. From my understanding, vpp is started first on the target host and then iscsi_tgt application is started after the network setup is done (please, correct me if this is not the case). ------- 192.168.2.10 | | initiator ------- | | | -------------------------------------------- 192.168.2.0 | | | 192.168.2.20 -------------- vpp, vppctl | | iscsi_tgt -------------- Both system have a 10GB NIC (On target Server): I set up the vpp environment variables through sysctl command. I unbind the kernel driver and loaded the DPDK uio_pci_generic driver for the first 10GB NIC (device address= 0000:82:00.0). That worked so I started the vpp application and from the startup output, the NIC is in used by vpp [[email protected] ~]# vpp -c /etc/vpp/startup.conf vlib_plugin_early_init:356: plugin path /usr/lib/vpp_plugins load_one_plugin:184: Loaded plugin: acl_plugin.so (Access Control Lists) load_one_plugin:184: Loaded plugin: dpdk_plugin.so (Data Plane Development Kit (DPDK)) load_one_plugin:184: Loaded plugin: flowprobe_plugin.so (Flow per Packet) load_one_plugin:184: Loaded plugin: gtpu_plugin.so (GTPv1-U) load_one_plugin:184: Loaded plugin: ila_plugin.so (Identifier-locator addressing for IPv6) load_one_plugin:184: Loaded plugin: ioam_plugin.so (Inbound OAM) load_one_plugin:114: Plugin disabled (default): ixge_plugin.so load_one_plugin:184: Loaded plugin: kubeproxy_plugin.so (kube-proxy data plane) load_one_plugin:184: Loaded plugin: l2e_plugin.so (L2 Emulation) load_one_plugin:184: Loaded plugin: lb_plugin.so (Load Balancer) load_one_plugin:184: Loaded plugin: libsixrd_plugin.so (IPv6 Rapid Deployment on IPv4 Infrastructure (RFC5969)) load_one_plugin:184: Loaded plugin: memif_plugin.so (Packet Memory Interface (experimetal)) load_one_plugin:184: Loaded plugin: nat_plugin.so (Network Address Translation) load_one_plugin:184: Loaded plugin: pppoe_plugin.so (PPPoE) load_one_plugin:184: Loaded plugin: stn_plugin.so (VPP Steals the NIC for Container integration) vpp[4168]: load_one_plugin:63: Loaded plugin: /usr/lib/vpp_api_test_plugins/acl_test_plugin.so vpp[4168]: load_one_plugin:63: Loaded plugin: /usr/lib/vpp_api_test_plugins/dpdk_test_plugin.so vpp[4168]: load_one_plugin:63: Loaded plugin: /usr/lib/vpp_api_test_plugins/flowprobe_test_plugin.so vpp[4168]: load_one_plugin:63: Loaded plugin: /usr/lib/vpp_api_test_plugins/gtpu_test_plugin.so vpp[4168]: load_one_plugin:63: Loaded plugin: /usr/lib/vpp_api_test_plugins/ioam_export_test_plugin.so vpp[4168]: load_one_plugin:63: Loaded plugin: /usr/lib/vpp_api_test_plugins/ioam_pot_test_plugin.so vpp[4168]: load_one_plugin:63: Loaded plugin: /usr/lib/vpp_api_test_plugins/ioam_trace_test_plugin.so vpp[4168]: load_one_plugin:63: Loaded plugin: /usr/lib/vpp_api_test_plugins/ioam_vxlan_gpe_test_plugin.so vpp[4168]: load_one_plugin:63: Loaded plugin: /usr/lib/vpp_api_test_plugins/kubeproxy_test_plugin.so vpp[4168]: load_one_plugin:63: Loaded plugin: /usr/lib/vpp_api_test_plugins/lb_test_plugin.so vpp[4168]: load_one_plugin:63: Loaded plugin: /usr/lib/vpp_api_test_plugins/memif_test_plugin.so vpp[4168]: load_one_plugin:63: Loaded plugin: /usr/lib/vpp_api_test_plugins/nat_test_plugin.so vpp[4168]: load_one_plugin:63: Loaded plugin: /usr/lib/vpp_api_test_plugins/pppoe_test_plugin.so vpp[4168]: load_one_plugin:63: Loaded plugin: /usr/lib/vpp_api_test_plugins/udp_ping_test_plugin.so vpp[4168]: load_one_plugin:63: Loaded plugin: /usr/lib/vpp_api_test_plugins/vxlan_gpe_ioam_export_test_plugin.so vpp[4168]: dpdk_config:1240: EAL init args: -c 1 -n 4 --huge-dir /run/vpp/hugepages --file-prefix vpp -w 0000:82:00.0 --master-lcore 0 --socket-mem 64,64 EAL: No free hugepages reported in hugepages-1048576kB EAL: VFIO support initialized DPDK physical memory layout: Segment 0: IOVA:0x2200000, len:2097152, virt:0x7f919c800000, socket_id:0, hugepage_sz:2097152, nchannel:0, nrank:0 Segment 1: IOVA:0x3e000000, len:16777216, virt:0x7f919b600000, socket_id:0, hugepage_sz:2097152, nchannel:0, nrank:0 Segment 2: IOVA:0x3fc00000, len:2097152, virt:0x7f919b200000, socket_id:0, hugepage_sz:2097152, nchannel:0, nrank:0 Segment 3: IOVA:0x54c00000, len:46137344, virt:0x7f917ae00000, socket_id:0, hugepage_sz:2097152, nchannel:0, nrank:0 Segment 4: IOVA:0x1f2e400000, len:67108864, virt:0x7f8f9c200000, socket_id:1, hugepage_sz:2097152, nchannel:0, nran STEP1: Then from vppctl command prompt, I set up ip address for the 10G interface and up it. From vpp, I can ping the initiator machine and vice versa as shown below. vpp# show int Name Idx State Counter Count TenGigabitEthernet82/0/0 1 down local0 0 down vpp# set interface ip address TenGigabitEthernet82/0/0 192.168.2.20/24 vpp# set interface state TenGigabitEthernet82/0/0 up vpp# show int Name Idx State Counter Count TenGigabitEthernet82/0/0 1 up local0 0 down vpp# show int address TenGigabitEthernet82/0/0 (up): 192.168.2.20/24 local0 (dn): /* ping initiator from vpp */ vpp# ping 192.168.2.10 64 bytes from 192.168.2.10: icmp_seq=1 ttl=64 time=.0779 ms 64 bytes from 192.168.2.10: icmp_seq=2 ttl=64 time=.0396 ms 64 bytes from 192.168.2.10: icmp_seq=3 ttl=64 time=.0316 ms 64 bytes from 192.168.2.10: icmp_seq=4 ttl=64 time=.0368 ms 64 bytes from 192.168.2.10: icmp_seq=5 ttl=64 time=.0327 ms (On Initiator): /* ping vpp interface from initiator*/ [[email protected] ~]# ping -c 2 192.168.2.20 PING 192.168.2.20 (192.168.2.20) 56(84) bytes of data. 64 bytes from 192.168.2.20: icmp_seq=1 ttl=64 time=0.038 ms 64 bytes from 192.168.2.20: icmp_seq=2 ttl=64 time=0.031 ms STEP2: However, when I start the iscsi_tgt server, it does not have access to the above 192.168.2.x subnet so I ran these commands on the target server to create veth and then connected it to a vpp host-interface as follows: ip link add name vpp1out type veth peer name vpp1host ip link set dev vpp1out up ip link set dev vpp1host up ip addr add 192.168.2.201/24 dev vpp1host vpp# create host-interface name vpp1out vpp# set int state host-vpp1out up vpp# set int ip address host-vpp1out 192.168.2.202 vpp# show int addr TenGigabitEthernet82/0/0 (up): 192.168.2.20/24 host-vpp1out (up): 192.168.2.202/24 local0 (dn): vpp# trace add af-packet-input 10 /* From host, ping vpp */ [[email protected] ~]# ping -c 2 192.168.2.202 PING 192.168.2.202 (192.168.2.202) 56(84) bytes of data. 64 bytes from 192.168.2.202: icmp_seq=1 ttl=64 time=0.130 ms 64 bytes from 192.168.2.202: icmp_seq=2 ttl=64 time=0.067 ms /* From vpp, ping host */ vpp# ping 192.168.2.201 64 bytes from 192.168.2.201: icmp_seq=1 ttl=64 time=.1931 ms 64 bytes from 192.168.2.201: icmp_seq=2 ttl=64 time=.1581 ms 64 bytes from 192.168.2.201: icmp_seq=3 ttl=64 time=.1235 ms 64 bytes from 192.168.2.201: icmp_seq=4 ttl=64 time=.1032 ms 64 bytes from 192.168.2.201: icmp_seq=5 ttl=64 time=.0688 ms Statistics: 5 sent, 5 received, 0% packet loss Please, how does one create the vpp host interface and connect it, so that host applications (ie. iscsi_tgt) can communicate in the 192.168.2 subnet? In STEP2, should I use a different subnet like 192.168.3.X and turn on IP forwarding add a route to the routing table? Isaac From: Zawadzki, Tomasz [mailto:[email protected]] Sent: Thursday, April 12, 2018 12:27 AM To: Isaac Otsiabah <[email protected]<mailto:[email protected]>> Cc: Harris, James R <[email protected]<mailto:[email protected]>>; Verkamp, Daniel <[email protected]<mailto:[email protected]>>; Paul Von-Stamwitz <[email protected]<mailto:[email protected]>> Subject: RE: anyone ran the SPDK ( app/iscsi_tgt/iscsi_tgt ) with VPP? Hello Isaac, Are you using following patch ? (I suggest cherry picking it) https://review.gerrithub.io/#/c/389566/ SPDK iSCSI target can be started without specific interface to bind on, by not specifying any target nodes or portal groups. They can be added later via RPC http://www.spdk.io/doc/iscsi.html#iscsi_rpc. Please see https://github.com/spdk/spdk/blob/master/test/iscsi_tgt/lvol/iscsi.conf for example of minimal iSCSI config. Suggested flow of starting up applications is: 1. Unbind interfaces from kernel 2. Start VPP and configure the interface via vppctl 3. Start SPDK 4. Configure the iSCSI target via RPC, at this time it should be possible to use the interface configured in VPP Please note, there is some leeway here. The only requirement is having VPP app started before SPDK app. Interfaces in VPP can be created (like tap or veth) and configured at runtime, and are available for use in SPDK as well. Let me know if you have any questions. Tomek From: Isaac Otsiabah [mailto:[email protected]] Sent: Wednesday, April 11, 2018 8:47 PM To: Zawadzki, Tomasz <[email protected]<mailto:[email protected]>> Cc: Harris, James R <[email protected]<mailto:[email protected]>>; Verkamp, Daniel <[email protected]<mailto:[email protected]>>; Paul Von-Stamwitz <[email protected]<mailto:[email protected]>> Subject: anyone ran the SPDK ( app/iscsi_tgt/iscsi_tgt ) with VPP? Hi Tomaz, Daniel and Jim, i am trying to test VPP so build the VPP on a Centos 7.4 (x86_64), build the SPDK and tried to run the ./app/iscsi_tgt/iscsi_tgt application. For VPP, first, I unbind the nick from the kernel as and start VPP application. ./usertools/dpdk-devbind.py -u 0000:07:00.0 vpp unix {cli-listen /run/vpp/cli.sock} Unbinding the nic takes down the interface, however, the ./app/iscsi_tgt/iscsi_tgt -m 0x101 application needs an interface to bind to during startup so it fails to start. The information at: "Running SPDK with VPP VPP application has to be started before SPDK iSCSI target, in order to enable usage of network interfaces. After SPDK iSCSI target initialization finishes, interfaces configured within VPP will be available to be configured as portal addresses. Please refer to Configuring iSCSI Target via RPC method<http://www.spdk.io/doc/iscsi.html#iscsi_rpc>." is not clear because the instructions at the "Configuring iSCSI Traget via RPC method" suggest the iscsi_tgt server is running for one to be able to execute the RPC commands but, how do I get the iscsi_tgt server running without an interface to bind on during its initialization? Please, can anyone of you help to explain how to run the SPDK iscsi_tgt application with VPP (for instance, what should change in iscsi.conf?) after unbinding the nic, how do I get the iscsi_tgt server to start without an interface to bind to, what address should be assigned to the Portal in iscsi.conf.. etc)? I would appreciate if anyone would help. Thank you. Isaac

Hello Isaac, I see the results were from kernel tap interfaces. This type of interface is intended only for functional test or as example. Repeating those tests with setup from previous emails in the thread (2 hosts, each with 10Gb network card), should show much better results. Can you please let us know what the results from that setup are ? Thanks, Tomek From: Isaac Otsiabah [mailto:[email protected]] Sent: Thursday, May 3, 2018 12:40 PM To: Zawadzki, Tomasz <tomasz.zawadzki(a)intel.com&gt;; &#39;spdk(a)lists.01.org&#39; <spdk(a)lists.01.org&gt; Cc: Edward Yang <eyang(a)us.fujitsu.com&gt; Subject: RE: SPDK ( app/iscsi_tgt/iscsi_tgt ) with VPP testing; Made progress but we have errors Tomasz, we have been testing vpp but we are not getting good result. To make things simpler, we ran the iscsi_tgt server with one nvme device (with no vpp running) and then ran fio on the same node. The result was good. We then configured vpp, started the iscsi_tgt server, executed the RPC commands to use one nvme device, and ran fio on the same node. The fio results were not good, IOPS were too low. Please, can you look at it and let us if you see anything incorrect with the setup here? Thank you. [[email protected] ~]# cat fio-bdev-jobfile2 [global] filename=/dev/sdp ioengine=libaio thread=1 group_reporting=1 direct=1 ramp_time=30 runtime=60 iodepth=4 readwrite=randrw rwmixwrite=100 bs=4096 [test] numjobs=1 [[email protected] ~]# fio fio-bdev-jobfile2 test: (g=0): rw=randrw, bs=4K-4K/4K-4K/4K-4K, ioengine=libaio, iodepth=2 fio-2.8 Starting 1 thread Jobs: 1 (f=1): [w(1)] [100.0% done] [0KB/312KB/0KB /s] [0/78/0 iops] [eta 00m:00s] test: (groupid=0, jobs=1): err= 0: pid=13972: Thu May 3 11:36:55 2018 write: io=18468KB, bw=315129B/s, iops=76, runt= 60011msec slat (usec): min=6, max=34, avg= 9.17, stdev= 1.58 clat (msec): min=15, max=50, avg=25.99, stdev= 1.56 lat (msec): min=15, max=50, avg=26.00, stdev= 1.56 clat percentiles (usec): | 1.00th=[24960], 5.00th=[24960], 10.00th=[24960], 20.00th=[25984], | 30.00th=[25984], 40.00th=[25984], 50.00th=[25984], 60.00th=[25984], | 70.00th=[25984], 80.00th=[25984], 90.00th=[25984], 95.00th=[25984], | 99.00th=[38144], 99.50th=[38144], 99.90th=[38144], 99.95th=[49920], | 99.99th=[49920] bw (KB /s): min= 0, max= 319, per=99.20%, avg=304.56, stdev=28.83 lat (msec) : 20=0.35%, 50=99.59%, 100=0.09% cpu : usr=0.04%, sys=0.06%, ctx=2308, majf=0, minf=0 IO depths : 1=0.1%, 2=149.3%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued : total=r=0/w=4616/d=0, short=r=0/w=0/d=0, drop=r=0/w=0/d=0 latency : target=0, window=0, percentile=100.00%, depth=2 Run status group 0 (all jobs): WRITE: io=18468KB, aggrb=307KB/s, minb=307KB/s, maxb=307KB/s, mint=60011msec, maxt=60011msec Disk stats (read/write): sdp: ios=45/6888, merge=0/0, ticks=1168/179238, in_queue=180446, util=99.66% [[email protected] ~]# fio fio-bdev-jobfile2 test: (g=0): rw=randrw, bs=4K-4K/4K-4K/4K-4K, ioengine=libaio, iodepth=4 fio-2.8 Starting 1 thread Jobs: 1 (f=1): [w(1)] [100.0% done] [0KB/608KB/0KB /s] [0/152/0 iops] [eta 00m:00s] test: (groupid=0, jobs=1): err= 0: pid=14016: Thu May 3 11:38:43 2018 write: io=36860KB, bw=628951B/s, iops=153, runt= 60012msec slat (usec): min=3, max=31, avg= 7.45, stdev= 2.10 clat (msec): min=16, max=51, avg=26.05, stdev= 1.72 lat (msec): min=17, max=51, avg=26.06, stdev= 1.72 clat percentiles (usec): | 1.00th=[24960], 5.00th=[24960], 10.00th=[24960], 20.00th=[25984], | 30.00th=[25984], 40.00th=[25984], 50.00th=[25984], 60.00th=[25984], | 70.00th=[25984], 80.00th=[25984], 90.00th=[25984], 95.00th=[25984], | 99.00th=[38144], 99.50th=[38144], 99.90th=[49920], 99.95th=[49920], | 99.99th=[50944] bw (KB /s): min= 0, max= 628, per=99.08%, avg=608.34, stdev=58.15 lat (msec) : 20=0.13%, 50=99.77%, 100=0.13% cpu : usr=0.06%, sys=0.09%, ctx=2303, majf=0, minf=0 IO depths : 1=0.1%, 2=0.1%, 4=149.6%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued : total=r=0/w=9212/d=0, short=r=0/w=0/d=0, drop=r=0/w=0/d=0 latency : target=0, window=0, percentile=100.00%, depth=4 Run status group 0 (all jobs): WRITE: io=36860KB, aggrb=614KB/s, minb=614KB/s, maxb=614KB/s, mint=60012msec, maxt=60012msec Disk stats (read/write): sdp: ios=45/13776, merge=0/0, ticks=1155/358548, in_queue=359751, util=99.68% [[email protected] ~]# ip addr 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN qlen 1 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever inet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: eno1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq master ovs-system state UP qlen 1000 link/ether 90:1b:0e:25:62:62 brd ff:ff:ff:ff:ff:ff 4: eno2: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq state DOWN qlen 1000 link/ether 90:1b:0e:25:62:63 brd ff:ff:ff:ff:ff:ff 5: enp130s0f1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP qlen 1000 link/ether 90:1b:0e:30:90:94 brd ff:ff:ff:ff:ff:ff inet 192.168.3.10/24 brd 192.168.3.255 scope global enp130s0f1 valid_lft forever preferred_lft forever inet6 fe80::921b:eff:fe30:9094/64 scope link valid_lft forever preferred_lft forever 6: ib0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 4092 qdisc pfifo_fast state DOWN qlen 256 link/infiniband 80:00:02:08:fe:80:00:00:00:00:00:00:f4:52:14:03:00:88:e7:21 brd 00:ff:ff:ff:ff:12:40:1b:ff:ff:00:00:00:00:00:00:ff:ff:ff:ff 7: ib1: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 4092 qdisc pfifo_fast state DOWN qlen 256 link/infiniband 80:00:02:09:fe:80:00:00:00:00:00:00:f4:52:14:03:00:88:e7:22 brd 00:ff:ff:ff:ff:12:40:1b:ff:ff:00:00:00:00:00:00:ff:ff:ff:ff 8: ovs-system: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN qlen 1000 link/ether ea:52:7f:d9:9c:21 brd ff:ff:ff:ff:ff:ff 9: ovs-br0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN qlen 1000 link/ether 90:1b:0e:25:62:62 brd ff:ff:ff:ff:ff:ff inet 133.164.98.222/24 brd 133.164.98.255 scope global ovs-br0 valid_lft forever preferred_lft forever inet6 fe80::8005:6dff:feb8:9d43/64 scope link valid_lft forever preferred_lft forever 10: virbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN qlen 1000 link/ether 52:54:00:cd:3d:00 brd ff:ff:ff:ff:ff:ff inet 192.168.100.1/24 brd 192.168.100.255 scope global virbr0 valid_lft forever preferred_lft forever 11: virbr0-nic: <BROADCAST,MULTICAST> mtu 1500 qdisc pfifo_fast master virbr0 state DOWN qlen 1000 link/ether 52:54:00:cd:3d:00 brd ff:ff:ff:ff:ff:ff 15: tap0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UNKNOWN qlen 1000 link/ether 1e:73:e0:ec:88:d8 brd ff:ff:ff:ff:ff:ff inet 10.0.0.2/24 scope global tap0 valid_lft forever preferred_lft forever inet6 fe80::1c73:e0ff:feec:88d8/64 scope link valid_lft forever preferred_lft forever [[email protected] ~]# vppctl _______ _ _ _____ ___ __/ __/ _ \ (_)__ | | / / _ \/ _ \ _/ _// // / / / _ \ | |/ / ___/ ___/ /_/ /____(_)_/\___/ |___/_/ /_/ vpp# show interface Name Idx State Counter Count TenGigabitEthernet82/0/0 1 down local0 0 down tapcli-0 2 up rx packets 100125 rx bytes 92676313 tx packets 123127 tx bytes 44517310 drops 9659 punts 12 ip4 99955 vpp# show interface address TenGigabitEthernet82/0/0 (dn): local0 (dn): tapcli-0 (up): 10.0.0.1/24 vpp# Isaac/Edward From: Zawadzki, Tomasz [mailto:[email protected]] Sent: Friday, April 27, 2018 7:47 AM To: Isaac Otsiabah <[email protected]<mailto:[email protected]>>; &#39;spdk(a)lists.01.org&#39; <[email protected]<mailto:[email protected]>> Cc: Edward Yang <[email protected]<mailto:[email protected]>> Subject: RE: SPDK ( app/iscsi_tgt/iscsi_tgt ) with VPP testing; Made progress but we have errors Hello Isaac, Described network topology, SPDK and VPP setup looks correct to me. When error you are receiving is seen only on management messages like login this should be fine. It is generated when iscsi_tgt server receives TCP Reset during read. It happens on both posix and vpp net implementations on SPDK. What happens is iscsiadm sending RST instead of closing the connection after sending iSCSI login command to quickly end the TCP connection. A quick way to verify that, is to use "sudo tcpdump -i interface_name -nn 'tcp[13] & 4!=0'" on machine when iscsiadm login is used. This will display all packets with TCP RST. If this message occured during normal data transfer, then it might signify some issue with either connection or setup. Probably the log level of this message should be lowered to NOTICE and text enhanced. Thanks, Tomek From: Isaac Otsiabah [mailto:[email protected]] Sent: Thursday, April 26, 2018 8:22 PM To: Zawadzki, Tomasz <[email protected]<mailto:[email protected]>>; &#39;spdk(a)lists.01.org&#39; <[email protected]<mailto:[email protected]>> Cc: Edward Yang <[email protected]<mailto:[email protected]>> Subject: RE: SPDK ( app/iscsi_tgt/iscsi_tgt ) with VPP testing; Made progress but we have errors Tomasz, Edward (my co-worker) and i configured vpp on the same network topology as in my previous message. From the server, after starting the iscsi_tgt server, we executed RPC commands to set up the portal, add initiator, configure nvme bdev, construct_lvol_bdev and constructed a target node. However, the server error I sent on Monday still appears (in red). Any idea why we still get the error message (conn.c: 736:spdk_iscsi_conn_read_data: *ERROR*: spdk_sock_recv() failed, errno 104: Connection reset by peer) from iscsi_tgt server? is our vpp configuration correct? Thank you. (On Server-192.168.2.10): [[email protected] spdk]# vppctl _______ _ _ _____ ___ __/ __/ _ \ (_)__ | | / / _ \/ _ \ _/ _// // / / / _ \ | |/ / ___/ ___/ /_/ /____(_)_/\___/ |___/_/ /_/ vpp# show int Name Idx State Counter Count TenGigabitEthernet82/0/0 1 up rx packets 1863376 rx bytes 2744564878 tx packets 1874613 tx bytes 139636606 drops 4272 punts 4 ip4 1863210 ip6 10 local0 0 down vpp# show int address TenGigabitEthernet82/0/0 (up): 192.168.2.10/24 local0 (dn): vpp# [[email protected] spdk]# ./app/iscsi_tgt/iscsi_tgt -m 0x0101 Starting SPDK v18.04-pre / DPDK 18.02.0 initialization... [ DPDK EAL parameters: iscsi -c 0x0101 --file-prefix=spdk_pid14476 ] EAL: Detected 16 lcore(s) EAL: No free hugepages reported in hugepages-1048576kB EAL: Multi-process socket /var/run/.spdk_pid14476_unix EAL: Probing VFIO support... EAL: VFIO support initialized app.c: 443:spdk_app_start: *NOTICE*: Total cores available: 2 reactor.c: 650:spdk_reactors_init: *NOTICE*: Occupied cpu socket mask is 0x3 reactor.c: 434:_spdk_reactor_run: *NOTICE*: Reactor started on core 8 on socket 1 reactor.c: 434:_spdk_reactor_run: *NOTICE*: Reactor started on core 0 on socket 0 EAL: PCI device 0000:04:00.0 on NUMA socket 0 EAL: probe driver: 8086:953 spdk_nvme EAL: using IOMMU type 1 (Type 1) lvol.c:1051:_spdk_lvs_verify_lvol_name: *ERROR*: lvol with name lbd_0 already exists conn.c: 323:spdk_iscsi_conn_construct: *NOTICE*: Launching connection on acceptor thread iscsi.c:2090:spdk_iscsi_op_login_notify_session_info: *NOTICE*: Login(discovery) from iqn.1994-05.com.redhat:92bdee055ba (192.168.2.20) on (192.168.2.10:3260,1), ISID=23d000000, TSIH=1, CID=0, HeaderDigest=off, DataDigest=off conn.c: 736:spdk_iscsi_conn_read_data: *ERROR*: spdk_sock_recv() failed, errno 104: Connection reset by peer conn.c: 455:spdk_iscsi_remove_conn: *NOTICE*: Terminating connections(tsih 1): 0 conn.c: 323:spdk_iscsi_conn_construct: *NOTICE*: Launching connection on acceptor thread iscsi.c:2078:spdk_iscsi_op_login_notify_session_info: *NOTICE*: Login from iqn.1994-05.com.redhat:92bdee055ba (192.168.2.20) on iqn.2016-06.io.spdk:Target0 tgt_node-1 (192.168.2.10:3260,1), ISID=23d000007, TSIH=2, CID=0, HeaderDigest=off, DataDigest=off (On Client-192.168.2.10): [[email protected] ~]#iscsiadm -m discovery -t sendtargets -p 192.168.2.10 192.168.2.10:3260,1 iqn.2016-06.io.spdk:Target0 [[email protected] ~]#iscsiadm -m node --login Logging in to [iface: default, target: iqn.2016-06.io.spdk:Target0, portal: 192.168.2.10,3260] (multiple) Login to [iface: default, target: iqn.2016-06.io.spdk:Target0, portal: 192.168.2.10,3260] successful. [[email protected] ~]# [[email protected] ~]# ls -l /dev/sd* brw-rw---- 1 root disk 8, 0 Apr 25 15:03 /dev/sda brw-rw---- 1 root disk 8, 1 Apr 25 15:03 /dev/sda1 brw-rw---- 1 root disk 8, 2 Apr 25 15:03 /dev/sda2 brw-rw---- 1 root disk 8, 3 Apr 25 15:03 /dev/sda3 brw-rw---- 1 root disk 8, 16 Apr 25 15:03 /dev/sdb brw-rw---- 1 root disk 8, 32 Apr 25 15:03 /dev/sdc brw-rw---- 1 root disk 8, 48 Apr 25 15:03 /dev/sdd brw-rw---- 1 root disk 8, 49 Apr 25 15:03 /dev/sdd1 brw-rw---- 1 root disk 8, 64 Apr 25 15:03 /dev/sde brw-rw---- 1 root disk 8, 80 Apr 25 15:03 /dev/sdf brw-rw---- 1 root disk 8, 96 Apr 25 15:03 /dev/sdg brw-rw---- 1 root disk 8, 112 Apr 25 15:03 /dev/sdh brw-rw---- 1 root disk 8, 128 Apr 25 15:03 /dev/sdi brw-rw---- 1 root disk 8, 144 Apr 25 15:03 /dev/sdj brw-rw---- 1 root disk 8, 160 Apr 25 15:03 /dev/sdk brw-rw---- 1 root disk 8, 176 Apr 25 15:03 /dev/sdl brw-rw---- 1 root disk 8, 192 Apr 25 15:03 /dev/sdm brw-rw---- 1 root disk 8, 208 Apr 25 15:03 /dev/sdn brw-rw---- 1 root disk 8, 224 Apr 25 15:03 /dev/sdo brw-rw---- 1 root disk 8, 240 Apr 25 19:17 /dev/sdp Isaac From: Isaac Otsiabah Sent: Monday, April 23, 2018 4:43 PM To: 'Zawadzki, Tomasz' <[email protected]<mailto:[email protected]>>; &#39;spdk(a)lists.01.org&#39; <[email protected]<mailto:[email protected]>> Subject: SPDK ( app/iscsi_tgt/iscsi_tgt ) with VPP testing; Made progress but we have errors Tomasz, Edward and I have been working on this again today. We did not create any veth nor tap device. Instead in vppctl we set the 10G interface to 192.168.2.10/10 and then upped the interface as shown below. (On Server): [email protected] ~]# vppctl _______ _ _ _____ ___ __/ __/ _ \ (_)__ | | / / _ \/ _ \ _/ _// // / / / _ \ | |/ / ___/ ___/ /_/ /____(_)_/\___/ |___/_/ /_/ vpp# show int addr TenGigabitEthernet82/0/0 (up): 192.168.2.10/24 local0 (dn): The client ip address is 192.168.2.20 The we started the iscsi_tgt server and executed the commands below. python /root/spdk_vpp/spdk/scripts/rpc.py add_portal_group 1 192.168.2.10:3260 python /root/spdk_vpp/spdk/scripts/rpc.py add_initiator_group 2 ANY 192.168.2.20/24 python /root/spdk_vpp/spdk/scripts/rpc.py construct_malloc_bdev -b MyBdev 64 512 python /root/spdk_vpp/spdk/scripts/rpc.py construct_target_node Target3 Target3_alias MyBdev:0 1:2 64 We got these errors from iscsi_tgt server (as shown below). conn.c: 323:spdk_iscsi_conn_construct: *NOTICE*: Launching connection on acceptor thread iscsi.c:2090:spdk_iscsi_op_login_notify_session_info: *NOTICE*: Login(discovery) from iqn.1994-05.com.redhat:92bdee055ba (192.168.2.20) on (192.168.2.10:3260,1), ISID=23d000000, TSIH=1, CID=0, HeaderDigest=off, DataDigest=off conn.c: 736:spdk_iscsi_conn_read_data: *ERROR*: spdk_sock_recv() failed, errno 104: Connection reset by peer conn.c: 455:spdk_iscsi_remove_conn: *NOTICE*: Terminating connections(tsih 1): 0 conn.c: 323:spdk_iscsi_conn_construct: *NOTICE*: Launching connection on acceptor thread iscsi.c:2090:spdk_iscsi_op_login_notify_session_info: *NOTICE*: Login(discovery) from iqn.1994-05.com.redhat:92bdee055ba (192.168.2.20) on (192.168.2.10:3260,1), ISID=23d000000, TSIH=2, CID=0, HeaderDigest=off, DataDigest=off conn.c: 736:spdk_iscsi_conn_read_data: *ERROR*: spdk_sock_recv() failed, errno 104: Connection reset by peer conn.c: 455:spdk_iscsi_remove_conn: *NOTICE*: Terminating connections(tsih 2): 0 conn.c: 323:spdk_iscsi_conn_construct: *NOTICE*: Launching connection on acceptor thread iscsi.c:2078:spdk_iscsi_op_login_notify_session_info: *NOTICE*: Login from iqn.1994-05.com.redhat:92bdee055ba (192.168.2.20) on iqn.2016-06.io.spdk:Target3 tgt_node-1 (192.168.2.10:3260,1), ISID=23d000001, TSIH=3, CID=0, HeaderDigest=off, DataDigest=off iscsi.c:2601:spdk_iscsi_op_logout: *NOTICE*: Logout from iqn.1994-05.com.redhat:92bdee055ba (192.168.2.20) on iqn.2016-06.io.spdk:Target3 tgt_node-1 (192.168.2.10:3260,1), ISID=23d000001, TSIH=3, CID=0, HeaderDigest=off, DataDigest=off conn.c: 736:spdk_iscsi_conn_read_data: *ERROR*: spdk_sock_recv() failed, errno 104: Connection reset by peer conn.c: 455:spdk_iscsi_remove_conn: *NOTICE*: Terminating connections(tsih 3): 0 conn.c: 323:spdk_iscsi_conn_construct: *NOTICE*: Launching connection on acceptor thread iscsi.c:2078:spdk_iscsi_op_login_notify_session_info: *NOTICE*: Login from iqn.1994-05.com.redhat:92bdee055ba (192.168.2.20) on iqn.2016-06.io.spdk:Target3 tgt_node-1 (192.168.2.10:3260,1), ISID=23d000002, TSIH=4, CID=0, HeaderDigest=off, DataDigest=off (On client): However, we can see the iscsi devices from the client machine. Any suggestion on how to get rid of these errors? Were the above steps correct? Isaac/Edward From: Zawadzki, Tomasz [mailto:[email protected]] Sent: Tuesday, April 17, 2018 7:49 PM To: Isaac Otsiabah <[email protected]<mailto:[email protected]>>; &#39;spdk(a)lists.01.org&#39; <[email protected]<mailto:[email protected]>> Subject: RE: anyone ran the SPDK ( app/iscsi_tgt/iscsi_tgt ) with VPP? Hello Isaac, Thank you for all the detailed descriptions, it really helps to understand the steps you took. I see that you are working with two hosts and using network cards (TenGigabitEthernet82). Actually all you did in "STEP1" is enough for iscsi_tgt to listen on 192.168.2.20. "STEP2" is not required. Only thing left to do on target is to configure portal/initiator_group/target_node, described here<http://www.spdk.io/doc/iscsi.html#iscsi_rpc>. "Example: Tap interfaces on a single host" is describing situation when someone would like to try out VPP without using another host and "real" network cards. Same goes for veth interfaces used in scripts for per-patch tests - they are done on single host. Thinking back, there should be second example with exact setup that you have - two hosts using network cards. I will look into it. Thanks for all the feedback ! PS. Patch with VPP implementation is merged on master as of today, no need to cherry-pick anymore. Regards, Tomek From: Isaac Otsiabah [mailto:[email protected]] Sent: Wednesday, April 18, 2018 1:29 AM To: &#39;spdk(a)lists.01.org&#39; <[email protected]<mailto:[email protected]>>; Zawadzki, Tomasz <[email protected]<mailto:[email protected]>> Subject: RE: anyone ran the SPDK ( app/iscsi_tgt/iscsi_tgt ) with VPP? Hi Tomasz, after executing the commands from the paragraph Example: Tap interfaces on a single host in this link (http://www.spdk.io/doc/iscsi.html#vpp) document, when I ping vpp from the target Server i get a respond. [[email protected] ~]# vppctl _______ _ _ _____ ___ __/ __/ _ \ (_)__ | | / / _ \/ _ \ _/ _// // / / / _ \ | |/ / ___/ ___/ /_/ /____(_)_/\___/ |___/_/ /_/ vpp# tap connect tap0 tapcli-0 vpp# show interface Name Idx State Counter Count TenGigabitEthernet82/0/0 1 down local0 0 down tapcli-0 2 down drops 8 vpp# set interface state tapcli-0 up vpp# show interface Name Idx State Counter Count TenGigabitEthernet82/0/0 1 down local0 0 down tapcli-0 2 up drops 8 vpp# set interface ip address tapcli-0 192.168.2.20/24 vpp# show int addr TenGigabitEthernet82/0/0 (dn): local0 (dn): tapcli-0 (up): 192.168.2.20/24 ip addr add 192.168.2.202/24 dev tap0 ip link set tap0 up /* pinging vpp from target Server */ [[email protected] ~]# ping -c 2 192.168.2.20 PING 192.168.2.20 (192.168.2.20) 56(84) bytes of data. 64 bytes from 192.168.2.20: icmp_seq=1 ttl=64 time=0.129 ms 64 bytes from 192.168.2.20: icmp_seq=2 ttl=64 time=0.116 ms My question is, what about the 10G interface as shown above "TenGigabitEthernet82/0/0 1 down"? The document does not say anything about it. Shouldn't I set ip address for it and up it? Isaac From: SPDK [mailto:[email protected]] On Behalf Of Isaac Otsiabah Sent: Tuesday, April 17, 2018 11:46 AM To: 'Zawadzki, Tomasz' <[email protected]<mailto:[email protected]>>; &#39;spdk(a)lists.01.org&#39; <[email protected]<mailto:[email protected]>> Cc: Paul Von-Stamwitz <[email protected]<mailto:[email protected]>> Subject: Re: [SPDK] anyone ran the SPDK ( app/iscsi_tgt/iscsi_tgt ) with VPP? Hi Tomasz, I got the SPDK patch. My network topology is simple but making the network ip address accessible to the iscsi_tgt application and to vpp is not working. From my understanding, vpp is started first on the target host and then iscsi_tgt application is started after the network setup is done (please, correct me if this is not the case). ------- 192.168.2.10 | | initiator ------- | | | -------------------------------------------- 192.168.2.0 | | | 192.168.2.20 -------------- vpp, vppctl | | iscsi_tgt -------------- Both system have a 10GB NIC (On target Server): I set up the vpp environment variables through sysctl command. I unbind the kernel driver and loaded the DPDK uio_pci_generic driver for the first 10GB NIC (device address= 0000:82:00.0). That worked so I started the vpp application and from the startup output, the NIC is in used by vpp [[email protected] ~]# vpp -c /etc/vpp/startup.conf vlib_plugin_early_init:356: plugin path /usr/lib/vpp_plugins load_one_plugin:184: Loaded plugin: acl_plugin.so (Access Control Lists) load_one_plugin:184: Loaded plugin: dpdk_plugin.so (Data Plane Development Kit (DPDK)) load_one_plugin:184: Loaded plugin: flowprobe_plugin.so (Flow per Packet) load_one_plugin:184: Loaded plugin: gtpu_plugin.so (GTPv1-U) load_one_plugin:184: Loaded plugin: ila_plugin.so (Identifier-locator addressing for IPv6) load_one_plugin:184: Loaded plugin: ioam_plugin.so (Inbound OAM) load_one_plugin:114: Plugin disabled (default): ixge_plugin.so load_one_plugin:184: Loaded plugin: kubeproxy_plugin.so (kube-proxy data plane) load_one_plugin:184: Loaded plugin: l2e_plugin.so (L2 Emulation) load_one_plugin:184: Loaded plugin: lb_plugin.so (Load Balancer) load_one_plugin:184: Loaded plugin: libsixrd_plugin.so (IPv6 Rapid Deployment on IPv4 Infrastructure (RFC5969)) load_one_plugin:184: Loaded plugin: memif_plugin.so (Packet Memory Interface (experimetal)) load_one_plugin:184: Loaded plugin: nat_plugin.so (Network Address Translation) load_one_plugin:184: Loaded plugin: pppoe_plugin.so (PPPoE) load_one_plugin:184: Loaded plugin: stn_plugin.so (VPP Steals the NIC for Container integration) vpp[4168]: load_one_plugin:63: Loaded plugin: /usr/lib/vpp_api_test_plugins/acl_test_plugin.so vpp[4168]: load_one_plugin:63: Loaded plugin: /usr/lib/vpp_api_test_plugins/dpdk_test_plugin.so vpp[4168]: load_one_plugin:63: Loaded plugin: /usr/lib/vpp_api_test_plugins/flowprobe_test_plugin.so vpp[4168]: load_one_plugin:63: Loaded plugin: /usr/lib/vpp_api_test_plugins/gtpu_test_plugin.so vpp[4168]: load_one_plugin:63: Loaded plugin: /usr/lib/vpp_api_test_plugins/ioam_export_test_plugin.so vpp[4168]: load_one_plugin:63: Loaded plugin: /usr/lib/vpp_api_test_plugins/ioam_pot_test_plugin.so vpp[4168]: load_one_plugin:63: Loaded plugin: /usr/lib/vpp_api_test_plugins/ioam_trace_test_plugin.so vpp[4168]: load_one_plugin:63: Loaded plugin: /usr/lib/vpp_api_test_plugins/ioam_vxlan_gpe_test_plugin.so vpp[4168]: load_one_plugin:63: Loaded plugin: /usr/lib/vpp_api_test_plugins/kubeproxy_test_plugin.so vpp[4168]: load_one_plugin:63: Loaded plugin: /usr/lib/vpp_api_test_plugins/lb_test_plugin.so vpp[4168]: load_one_plugin:63: Loaded plugin: /usr/lib/vpp_api_test_plugins/memif_test_plugin.so vpp[4168]: load_one_plugin:63: Loaded plugin: /usr/lib/vpp_api_test_plugins/nat_test_plugin.so vpp[4168]: load_one_plugin:63: Loaded plugin: /usr/lib/vpp_api_test_plugins/pppoe_test_plugin.so vpp[4168]: load_one_plugin:63: Loaded plugin: /usr/lib/vpp_api_test_plugins/udp_ping_test_plugin.so vpp[4168]: load_one_plugin:63: Loaded plugin: /usr/lib/vpp_api_test_plugins/vxlan_gpe_ioam_export_test_plugin.so vpp[4168]: dpdk_config:1240: EAL init args: -c 1 -n 4 --huge-dir /run/vpp/hugepages --file-prefix vpp -w 0000:82:00.0 --master-lcore 0 --socket-mem 64,64 EAL: No free hugepages reported in hugepages-1048576kB EAL: VFIO support initialized DPDK physical memory layout: Segment 0: IOVA:0x2200000, len:2097152, virt:0x7f919c800000, socket_id:0, hugepage_sz:2097152, nchannel:0, nrank:0 Segment 1: IOVA:0x3e000000, len:16777216, virt:0x7f919b600000, socket_id:0, hugepage_sz:2097152, nchannel:0, nrank:0 Segment 2: IOVA:0x3fc00000, len:2097152, virt:0x7f919b200000, socket_id:0, hugepage_sz:2097152, nchannel:0, nrank:0 Segment 3: IOVA:0x54c00000, len:46137344, virt:0x7f917ae00000, socket_id:0, hugepage_sz:2097152, nchannel:0, nrank:0 Segment 4: IOVA:0x1f2e400000, len:67108864, virt:0x7f8f9c200000, socket_id:1, hugepage_sz:2097152, nchannel:0, nran STEP1: Then from vppctl command prompt, I set up ip address for the 10G interface and up it. From vpp, I can ping the initiator machine and vice versa as shown below. vpp# show int Name Idx State Counter Count TenGigabitEthernet82/0/0 1 down local0 0 down vpp# set interface ip address TenGigabitEthernet82/0/0 192.168.2.20/24 vpp# set interface state TenGigabitEthernet82/0/0 up vpp# show int Name Idx State Counter Count TenGigabitEthernet82/0/0 1 up local0 0 down vpp# show int address TenGigabitEthernet82/0/0 (up): 192.168.2.20/24 local0 (dn): /* ping initiator from vpp */ vpp# ping 192.168.2.10 64 bytes from 192.168.2.10: icmp_seq=1 ttl=64 time=.0779 ms 64 bytes from 192.168.2.10: icmp_seq=2 ttl=64 time=.0396 ms 64 bytes from 192.168.2.10: icmp_seq=3 ttl=64 time=.0316 ms 64 bytes from 192.168.2.10: icmp_seq=4 ttl=64 time=.0368 ms 64 bytes from 192.168.2.10: icmp_seq=5 ttl=64 time=.0327 ms (On Initiator): /* ping vpp interface from initiator*/ [[email protected] ~]# ping -c 2 192.168.2.20 PING 192.168.2.20 (192.168.2.20) 56(84) bytes of data. 64 bytes from 192.168.2.20: icmp_seq=1 ttl=64 time=0.038 ms 64 bytes from 192.168.2.20: icmp_seq=2 ttl=64 time=0.031 ms STEP2: However, when I start the iscsi_tgt server, it does not have access to the above 192.168.2.x subnet so I ran these commands on the target server to create veth and then connected it to a vpp host-interface as follows: ip link add name vpp1out type veth peer name vpp1host ip link set dev vpp1out up ip link set dev vpp1host up ip addr add 192.168.2.201/24 dev vpp1host vpp# create host-interface name vpp1out vpp# set int state host-vpp1out up vpp# set int ip address host-vpp1out 192.168.2.202 vpp# show int addr TenGigabitEthernet82/0/0 (up): 192.168.2.20/24 host-vpp1out (up): 192.168.2.202/24 local0 (dn): vpp# trace add af-packet-input 10 /* From host, ping vpp */ [[email protected] ~]# ping -c 2 192.168.2.202 PING 192.168.2.202 (192.168.2.202) 56(84) bytes of data. 64 bytes from 192.168.2.202: icmp_seq=1 ttl=64 time=0.130 ms 64 bytes from 192.168.2.202: icmp_seq=2 ttl=64 time=0.067 ms /* From vpp, ping host */ vpp# ping 192.168.2.201 64 bytes from 192.168.2.201: icmp_seq=1 ttl=64 time=.1931 ms 64 bytes from 192.168.2.201: icmp_seq=2 ttl=64 time=.1581 ms 64 bytes from 192.168.2.201: icmp_seq=3 ttl=64 time=.1235 ms 64 bytes from 192.168.2.201: icmp_seq=4 ttl=64 time=.1032 ms 64 bytes from 192.168.2.201: icmp_seq=5 ttl=64 time=.0688 ms Statistics: 5 sent, 5 received, 0% packet loss Please, how does one create the vpp host interface and connect it, so that host applications (ie. iscsi_tgt) can communicate in the 192.168.2 subnet? In STEP2, should I use a different subnet like 192.168.3.X and turn on IP forwarding add a route to the routing table? Isaac From: Zawadzki, Tomasz [mailto:[email protected]] Sent: Thursday, April 12, 2018 12:27 AM To: Isaac Otsiabah <[email protected]<mailto:[email protected]>> Cc: Harris, James R <[email protected]<mailto:[email protected]>>; Verkamp, Daniel <[email protected]<mailto:[email protected]>>; Paul Von-Stamwitz <[email protected]<mailto:[email protected]>> Subject: RE: anyone ran the SPDK ( app/iscsi_tgt/iscsi_tgt ) with VPP? Hello Isaac, Are you using following patch ? (I suggest cherry picking it) https://review.gerrithub.io/#/c/389566/ SPDK iSCSI target can be started without specific interface to bind on, by not specifying any target nodes or portal groups. They can be added later via RPC http://www.spdk.io/doc/iscsi.html#iscsi_rpc. Please see https://github.com/spdk/spdk/blob/master/test/iscsi_tgt/lvol/iscsi.conf for example of minimal iSCSI config. Suggested flow of starting up applications is: 1. Unbind interfaces from kernel 2. Start VPP and configure the interface via vppctl 3. Start SPDK 4. Configure the iSCSI target via RPC, at this time it should be possible to use the interface configured in VPP Please note, there is some leeway here. The only requirement is having VPP app started before SPDK app. Interfaces in VPP can be created (like tap or veth) and configured at runtime, and are available for use in SPDK as well. Let me know if you have any questions. Tomek From: Isaac Otsiabah [mailto:[email protected]] Sent: Wednesday, April 11, 2018 8:47 PM To: Zawadzki, Tomasz <[email protected]<mailto:[email protected]>> Cc: Harris, James R <[email protected]<mailto:[email protected]>>; Verkamp, Daniel <[email protected]<mailto:[email protected]>>; Paul Von-Stamwitz <[email protected]<mailto:[email protected]>> Subject: anyone ran the SPDK ( app/iscsi_tgt/iscsi_tgt ) with VPP? Hi Tomaz, Daniel and Jim, i am trying to test VPP so build the VPP on a Centos 7.4 (x86_64), build the SPDK and tried to run the ./app/iscsi_tgt/iscsi_tgt application. For VPP, first, I unbind the nick from the kernel as and start VPP application. ./usertools/dpdk-devbind.py -u 0000:07:00.0 vpp unix {cli-listen /run/vpp/cli.sock} Unbinding the nic takes down the interface, however, the ./app/iscsi_tgt/iscsi_tgt -m 0x101 application needs an interface to bind to during startup so it fails to start. The information at: "Running SPDK with VPP VPP application has to be started before SPDK iSCSI target, in order to enable usage of network interfaces. After SPDK iSCSI target initialization finishes, interfaces configured within VPP will be available to be configured as portal addresses. Please refer to Configuring iSCSI Target via RPC method<http://www.spdk.io/doc/iscsi.html#iscsi_rpc>." is not clear because the instructions at the "Configuring iSCSI Traget via RPC method" suggest the iscsi_tgt server is running for one to be able to execute the RPC commands but, how do I get the iscsi_tgt server running without an interface to bind on during its initialization? Please, can anyone of you help to explain how to run the SPDK iscsi_tgt application with VPP (for instance, what should change in iscsi.conf?) after unbinding the nic, how do I get the iscsi_tgt server to start without an interface to bind to, what address should be assigned to the Portal in iscsi.conf.. etc)? I would appreciate if anyone would help. Thank you. Isaac