對將要上線的功能進行檢查

網絡穩定性測試

• 關注的指標，avg(平均耗時)、loss(丟包率)
• route -n 網關ip查詢,從IP routing table中可以看到0.0.0.0對應的ip

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• ping
  • -c表示運行的秒數,運行完會反饋下面的結果
  • 實際執行的時間可能會大於設置的秒數

[root@iZ2ze5i5qr1kmeajdt3k6kZ ~]# ping -i 1 -q -c 86400 192.168.71.253
PING 192.168.71.253 (192.168.71.253) 56(84) bytes of data.
--- 192.168.71.253 ping statistics ---
86400 packets transmitted, 86400 received, 0% packet loss, time 86398301ms
rtt min/avg/max/mdev = 0.013/0.035/9.915/0.040 ms

• mtr
  • -c表示運行的秒數,運行完會反饋下面的結果
  • 會把經歷了哪些IP最終到的IP都顯示出來

[root@9Z2ze2i5Dr1gmeajpd8k2kZ ~]# mtr --report --no-dns --show-ips -i 1 -c 86400 172.36.10.8
Start: Tue May  8 20:32:46 2018
HOST: iZ2ze5i5qr1gmeajtd8k6kZ     Loss%   Snt   Last   Avg  Best  Wrst StDev
  1.|-- 192.168.69.139             0.0% 86400    1.1   1.0   1.0   7.3   0.1
  2.|-- 172.36.10.8                0.0% 86400    1.1   1.1   1.1  20.1   0.1

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HTTP壓測

• 關注的指標，RT(Latency Avg)、QPS(Requests/sec)、TPS(Transfer/sec)

• 測試的時候在接口中直接輸出4K、16K、32K的數據，模擬真實的情況。比直接壓測一個hello Word更有說服力

• netstat -ant | grep xxxx 、 lsof -i:port 可以對壓測中的數據進行查看

• siege

  • 併發數限制爲255,需要改配置文件
  • 造成的壓力不明顯

• ab

  • 併發數限制爲0-20000

• wrk

  • -latency 延時統計
  • -timeout 請求超時時間
  • -c 併發
  • -t 要使用的線程數
  • -d 測試持續時間

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• wrk

[root@chons ~]# wrk --latency --timeout 5 -c 1000 -t 1 -d 60 http://192.168.69.145:8080/output/data16k
Running 1m test @ http://192.168.69.145:8080/output/data16k
  1 threads and 1000 connections
  Thread Stats   Avg      Stdev     Max   +/- Stdev
    Latency     1.41s     1.12s    5.00s    69.06%
    Req/Sec   476.65    112.18     2.81k    93.50%
  Latency Distribution
     50%    1.08s
     75%    2.08s
     90%    3.11s
     99%    4.62s
  28476 requests in 1.00m, 463.92MB read
  Socket errors: connect 0, read 0, write 0, timeout 1909
Requests/sec:    474.47
Transfer/sec:      7.73MB

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DNS測試

• 生成了10W個隨機子域名
• 測試工具queryperf
• 關注指標QPS、RT、成功率（失敗率）

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工具安裝

• https://www.isc.org/downloads/
• wget https://www.isc.org/downloads/file/bind-9-10-7/?version=tar-gz
• 注意docker裏面的系統無法直接wget,把下載好的文件放到宿主機器。使用docker cp命令
• 解壓 && cd contrib/queryperf
• ./configure && make
• cp queryperf /usr/bin/

生成隨機子域名

for i in $(seq 0 100000); do  echo $i; echo "$(tr -dc a-z < /dev/urandom | head -c 12).default.svc.cluster.local A" >>testdata.txt; done

測試

• queryperf [-d datafile] [-s server_addr] [-p port] [-q num_queries]

  • -d: 後面接上一個文件，文件的內容是用戶對DNS的請求，一行爲一條請求，所以爲了測試，我們可以在裏面寫上幾千幾萬條。

  • -s: DNS服務器地址

  • -p: DNS服務器端口

  • -q: 請求多少次

• bash-4.3# queryperf -d testdata.txt -s 172.26.0.10 -q 5000

DNS Query Performance Testing Tool
Version: $Id: queryperf.c,v 1.12 2007/09/05 07:36:04 marka Exp $

[Status] Processing input data
[Status] Sending queries (beginning with 172.26.0.10)
Statistics:

[Timeout] Query timed out: msg id 4571
[Timeout] Query timed out: msg id 4572
[Timeout] Query timed out: msg id 4573
[Timeout] Query timed out: msg id 4574
[Timeout] Query timed out: msg id 4575
[Timeout] Query timed out: msg id 4576
[Timeout] Query timed out: msg id 4577
[Timeout] Query timed out: msg id 26478
[Status] Testing complete

Statistics:

  Parse input file:     once
  Ended due to:         reaching end of file

  Queries sent:         100001 queries
  Queries completed:    100001 queries
  Queries lost:         0 queries
  Queries delayed(?):   0 queries

  RTT max:         	0.137697 sec
  RTT min:              0.000201 sec
  RTT average:          0.000520 sec
  RTT std deviation:    0.001675 sec
  RTT out of range:     0 queries

  Percentage completed: 100.00%
  Percentage lost:        0.00%

  Started at:           Mon May 14 18:59:04 2018
  Finished at:          Mon May 14 18:59:13 2018
  Ran for:              8.893822 seconds

  Queries per second:   11243.872432 qps

#測試