ESXi7.0 で iperf3 を使ってみる

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2021.07.12
この記事は1年以上前に書かれたものです。 情報が古い可能性があります。

ESXi でネットワークのパフォーマンスを調べてみたかったので使ってみた。

ハイパーバイザー: VMware ESXi, 7.0.2

[2023/04/16 追記]
ESXi 7.0.x （2までは動いてた）から root 権限が変更され実行できなくなったようです。ESXi 8 についても同様。今のところ回避策は見つからず。The root account can no longer change permissions or executable files in ESXi 7.0.x (78689) (vmware.com)

[root@esxi-host01:~] /usr/lib/vmware/vsan/bin/iperf3 にあるが、そのままだとエラーになる。

[root@esxi-host01:~] /usr/lib/vmware/vsan/bin/iperf3 -s
iperf3: error - unable to start listener for connections: Operation not permitted
iperf3: exiting

しょうがないのでコピーして使う。

[root@esxi-host01:~] cp /usr/lib/vmware/vsan/bin/iperf3 /usr/lib/vmware/vsan/bin/iperf3.copy

ファイアウォールの解除も必要。（送受信どちら側も）

[root@esxi-host01:~] esxcli network firewall set --enabled false

サーバー側

[root@esxi-host01:~] /usr/lib/vmware/vsan/bin/iperf3.copy -s -B 172.16.1.1
-----------------------------------------------------------
Server listening on 5201
-----------------------------------------------------------
Accepted connection from 172.16.1.2, port 25381
[  5] local 172.16.1.1 port 5201 connected to 172.16.1.2 port 11858
iperf3: getsockopt - Function not implemented
[ ID] Interval           Transfer     Bandwidth
[  5]   0.00-1.00   sec  89.2 MBytes   748 Mbits/sec
iperf3: getsockopt - Function not implemented
[  5]   1.00-2.00   sec  81.5 MBytes   683 Mbits/sec
iperf3: getsockopt - Function not implemented
[  5]   2.00-3.00   sec  81.2 MBytes   682 Mbits/sec
iperf3: getsockopt - Function not implemented
[  5]   3.00-4.00   sec  81.3 MBytes   682 Mbits/sec
iperf3: getsockopt - Function not implemented
[  5]   4.00-5.00   sec  81.3 MBytes   682 Mbits/sec
iperf3: getsockopt - Function not implemented
[  5]   5.00-6.00   sec  81.3 MBytes   682 Mbits/sec
iperf3: getsockopt - Function not implemented
[  5]   6.00-7.00   sec  81.2 MBytes   681 Mbits/sec
iperf3: getsockopt - Function not implemented
[  5]   7.00-8.00   sec  81.3 MBytes   682 Mbits/sec
iperf3: getsockopt - Function not implemented
[  5]   8.00-9.00   sec  81.3 MBytes   682 Mbits/sec
iperf3: getsockopt - Function not implemented
[  5]   9.00-10.00  sec  81.3 MBytes   682 Mbits/sec
iperf3: getsockopt - Function not implemented
[  5]  10.00-10.13  sec  10.3 MBytes   682 Mbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bandwidth
[  5]   0.00-10.13  sec  0.00 Bytes  0.00 bits/sec                  sender
[  5]   0.00-10.13  sec   831 MBytes   688 Mbits/sec                  receiver
-----------------------------------------------------------
Server listening on 5201
-----------------------------------------------------------

クライアント側

[root@esxi-host02:~] /usr/lib/vmware/vsan/bin/iperf3.copy -c 172.16.1.1
Connecting to host 172.16.1.1, port 5201
[  4] local 172.16.1.2 port 11858 connected to 172.16.1.1 port 5201
iperf3: getsockopt - Function not implemented
[ ID] Interval           Transfer     Bandwidth       Retr  Cwnd
[  4]   0.00-1.00   sec  98.6 MBytes   827 Mbits/sec  8638824   0.00 Bytes      
iperf3: getsockopt - Function not implemented
[  4]   1.00-2.00   sec  82.4 MBytes   691 Mbits/sec    0   0.00 Bytes
iperf3: getsockopt - Function not implemented
[  4]   2.00-3.00   sec  81.2 MBytes   681 Mbits/sec    0   0.00 Bytes
iperf3: getsockopt - Function not implemented
[  4]   3.00-4.00   sec  81.4 MBytes   683 Mbits/sec    0   0.00 Bytes
iperf3: getsockopt - Function not implemented
[  4]   4.00-5.00   sec  81.3 MBytes   682 Mbits/sec    0   0.00 Bytes
iperf3: getsockopt - Function not implemented
[  4]   5.00-6.00   sec  81.3 MBytes   682 Mbits/sec    0   0.00 Bytes
iperf3: getsockopt - Function not implemented
[  4]   6.00-7.00   sec  81.2 MBytes   681 Mbits/sec    0   0.00 Bytes
iperf3: getsockopt - Function not implemented
[  4]   7.00-8.00   sec  81.3 MBytes   682 Mbits/sec    0   0.00 Bytes
iperf3: getsockopt - Function not implemented
[  4]   8.00-9.00   sec  81.2 MBytes   682 Mbits/sec    0   0.00 Bytes
iperf3: getsockopt - Function not implemented
[  4]   9.00-10.00  sec  81.3 MBytes   682 Mbits/sec  4286328472   0.00 Bytes   
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bandwidth       Retr
[  4]   0.00-10.00  sec   831 MBytes   697 Mbits/sec    0             sender
[  4]   0.00-10.00  sec   831 MBytes   697 Mbits/sec                  receiver

iperf Done.

オプションはお好みで。

-pサーバ側でListenするポート。クライアントは接続先を指定。
-iインターバル。
-uUDPを使用する。
-t計測時間(秒)を指定する。
-Mtcp の mss。(MTU – 40バイト)
-B送受信に使用するインターフェース(IP)を指定する。
root@esxi-host02:~] /usr/lib/vmware/vsan/bin/iperf3.copy -h
Usage: iperf [-s|-c host] [options]
       iperf [-h|--help] [-v|--version]

Server or Client:
  -p, --port      #         server port to listen on/connect to
  -f, --format    [kmgKMG]  format to report: Kbits, Mbits, KBytes, MBytes
  -i, --interval  #         seconds between periodic bandwidth reports
  -F, --file name           xmit/recv the specified file
  -A, --affinity n/n,m      set CPU affinity
  -B, --bind      <host>    bind to a specific interface
  -V, --verbose             more detailed output
  -J, --json                output in JSON format
  --logfile f               send output to a log file
  --forceflush              force flushing output at every interval
  -d, --debug               emit debugging output
  -v, --version             show version information and quit
  -h, --help                show this message and quit
Server specific:
  -s, --server              run in server mode
  -D, --daemon              run the server as a daemon
  -I, --pidfile file        write PID file
  -1, --one-off             handle one client connection then exit
Client specific:
  -c, --client    <host>    run in client mode, connecting to <host>
  -u, --udp                 use UDP rather than TCP
  -b, --bandwidth #[KMG][/#] target bandwidth in bits/sec (0 for unlimited)
                            (default 1 Mbit/sec for UDP, unlimited for TCP)
                            (optional slash and packet count for burst mode)
  -t, --time      #         time in seconds to transmit for (default 10 secs)
  -n, --bytes     #[KMG]    number of bytes to transmit (instead of -t)
  -k, --blockcount #[KMG]   number of blocks (packets) to transmit (instead of -t or -n)
  -l, --len       #[KMG]    length of buffer to read or write
                            (default 128 KB for TCP, dynamic or 1 for UDP)
  --cport         <port>    bind to a specific client port (TCP and UDP, default: ephemeral port)
  -P, --parallel  #         number of parallel client streams to run
  -R, --reverse             run in reverse mode (server sends, client receives)
  -w, --window    #[KMG]    set window size / socket buffer size
  -C, --congestion <algo>   set TCP congestion control algorithm (Linux and FreeBSD only)
  -M, --set-mss   #         set TCP/SCTP maximum segment size (MTU - 40 bytes)
  -N, --no-delay            set TCP/SCTP no delay, disabling Nagle's Algorithm
  -4, --version4            only use IPv4
  -6, --version6            only use IPv6
  -S, --tos N               set the IP 'type of service'
  -L, --flowlabel N         set the IPv6 flow label (only supported on Linux)
  -Z, --zerocopy            use a 'zero copy' method of sending data
  -O, --omit N              omit the first n seconds
  -T, --title str           prefix every output line with this string
  --get-server-output       get results from server
  --udp-counters-64bit      use 64-bit counters in UDP test packets

[KMG] indicates options that support a K/M/G suffix for kilo-, mega-, or giga-

Report bugs to:     https://github.com/esnet/iperf

戻すのも忘れずに。

[root@esxi-host01:~] esxcli network firewall set --enabled true

[root@esxi-host01:~] esxcli network firewall get
   Default Action: DROP
   Enabled: true
   Loaded: true

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