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Add the trex tutorial document #559
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TRex是⼀款开源的发包⼯具,它跑在标准的intel处理芯⽚上,同时⽀持stateful和stateless模式,stateful可以描述L4~L7 层的应⽤场景,⽽stateless主要⽤来进⾏定制包的发送。 | ||
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**T-Rex 特性** | ||
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1. Stateful | ||
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- ⽀持⾼达200Gb/s的流量测试,需要⽹卡及CPU⽀持,⼀般跟core个数有关 | ||
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- ⽀持时延和抖动,⽀持NAT/PAT⾃动学习,⽀持L4~L7 | ||
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2. Stateless | ||
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- 轻易产⽣stateless traffic stream,⽀持⼤流量 20mpps,⽀持stream并发,⽀持更改报⽂字段范围 | ||
- ⽀持Continuous/Burst/Multi-burst support,⽀持console/GUI,⽀持每条流的统计 | ||
- ⽀持pythonAPI | ||
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**安装** | ||
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1. 下载最新v2.56版本: | ||
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``` | ||
# wget https://github.com/cisco-system-traffic-generator/trex-core/archive/v2.56.tar.gz | ||
# tar -xvf v2.56.tar.gz | ||
# cd trex-core-2.56/ | ||
``` | ||
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2. 编译源码: | ||
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``` | ||
# yum install gcc gcc-c++ kernel-devel | ||
# cd linux_dpdk/ | ||
# ./b configure | ||
# ./b build | ||
# cd ../linux | ||
# ./b configure | ||
# ./b build | ||
``` | ||
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3. 修改配置⽂件,绑定测试端⼝: | ||
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``` | ||
# cat /etc/trex_cfg.yaml | ||
### Config file generated by dpdk_setup_ports.py ### | ||
- version: 2 | ||
interfaces: ['02:00.0', '02:00.1'] | ||
port_info: | ||
- ip: 10.142.116.28 | ||
default_gw: 10.142.116.254 | ||
dest_mac: 00:00:0c:9f:f3:74 | ||
- ip: 10.142.117.28 | ||
default_gw: 10.142.117.254 | ||
dest_mac: 00:00:0c:9f:f3:75 | ||
platform: | ||
master_thread_id: 0 | ||
latency_thread_id: 8 | ||
dual_if: | ||
- socket: 0 | ||
threads: [1,2,3,4,5,6,7,16,17,18,19,20,21,22,23] | ||
``` | ||
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4. 启动t-rex服务 | ||
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``` | ||
# cd ../scripts | ||
# ./t-rex-64 -i | ||
``` | ||
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5. 另外开⼀个终端,启动trex-console,进⼊service模式,执⾏arp命令⾃动解析⽹关mac地址: | ||
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``` | ||
# ./trex-console | ||
… | ||
trex>service | ||
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Enabling service mode on port(s) [0, 1]: [SUCCESS] | ||
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8.51 [ms] | ||
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trex(service)>arp | ||
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Resolving destination on port(s) [0, 1]: [SUCCESS] | ||
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Port 0 - Recieved ARP reply from: 10.142.116.254, hw: 00:00:0c:9f:f3:74 | ||
Port 1 - Recieved ARP reply from: 10.142.117.254, hw: 00:00:0c:9f:f3:75 | ||
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443.34 [ms] | ||
``` | ||
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6. 执⾏ping测试⽹关连通性: | ||
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``` | ||
trex(service)>ping -p 0 -d 10.142.116.254 | ||
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Pinging 10.142.116.254 from port 0 with 64 bytes of data: | ||
Reply from 10.142.116.254: bytes=64, time=1.04ms, TTL=255 | ||
Reply from 10.142.116.254: bytes=64, time=0.84ms, TTL=255 | ||
Reply from 10.142.116.254: bytes=64, time=1.35ms, TTL=255 | ||
Reply from 10.142.116.254: bytes=64, time=1.43ms, TTL=255 | ||
Reply from 10.142.116.254: bytes=64, time=1.23ms, TTL=255 | ||
trex(service)>ping -p 1 -d 10.142.117.254 | ||
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Pinging 10.142.117.254 from port 1 with 64 bytes of data: | ||
Reply from 10.142.117.254: bytes=64, time=1.48ms, TTL=255 | ||
Reply from 10.142.117.254: bytes=64, time=2.33ms, TTL=255 | ||
Reply from 10.142.117.254: bytes=64, time=1.63ms, TTL=255 | ||
Reply from 10.142.117.254: bytes=64, time=1.44ms, TTL=255 | ||
Reply from 10.142.117.254: bytes=64, time=1.29ms, TTL=255 **Stateful** | ||
``` | ||
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**Stateful** | ||
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Stateful模式指的是⽹络设备对每条流保存其五元组,TRex通常先录制⼀条流的⼀组报⽂,随后以这组报⽂为模板,在真 正测试的时候,更改其src/dst IP和Port,TRex⾃身没有协议栈,却让⽹络设备有了状态,因此它可以测试L4~L7层的应 ⽤,重点是提前录制连接的过程。 | ||
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1. 设置端⼝与DUT相连,修改trex配置: | ||
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``` | ||
![pcap](E:\code\github\dpvs\doc\pics\pcap.png)# cat /etc/trex_cfg.yaml | ||
- port_limit : 2 | ||
version : 2 | ||
#List of interfaces. Change to suit your setup. Use ./dpdk_setup_ports.py -s to see available | ||
options | ||
interfaces : ["07:00.0", "07:00.1"] | ||
port_info : # Port IPs. Change to suit your needs. In case of loopback, you can leave as | ||
is. | ||
- ip : 10.142.117.100 | ||
default_gw : 10.142.117.254 | ||
dest_mac : 6c:92:bf:13:ee:36 | ||
- ip : 10.142.117.101 | ||
default_gw : 10.142.117.254 | ||
dest_mac : 6c:92:bf:13:ee:37 | ||
``` | ||
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2. 以http访问测试为例,⾸先抓取访问http⼀次访问的包作为模板,保存为http_test.pcap,内容参考如下: ![pcap](pics\pcap.png) | ||
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3. 新增yaml设定,内容参考如下: | ||
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``` | ||
# cat http_test.yaml | ||
- duration : 0.1 | ||
generator : | ||
distribution : "seq" | ||
clients_start : "10.142.117.100" | ||
clients_end : "10.142.117.131" | ||
servers_start : "10.142.116.1" | ||
servers_end : "10.142.116.1" | ||
clients_per_gb : 201 | ||
min_clients : 101 | ||
dual_port_mask : "1.0.0.0" | ||
tcp_aging : 0 | ||
udp_aging : 0 | ||
cap_ipg : true | ||
cap_info : | ||
- name: http_test.pcap | ||
cps : 2.776 | ||
ipg : 10000 | ||
rtt : 10000 | ||
w : 1 | ||
``` | ||
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4. 执⾏trex命令测试: | ||
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``` | ||
# ./t-rex-64 -f http_test.yaml -d 100 -m 100 -v 7 | ||
``` | ||
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**ASTF** | ||
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ASTF是⾼级statefull测试模式,可以通过python脚本⾃动化测试L4~L7场景,尤其对TCP协议栈⽀持⽐较完善。下⾯以通 过wget访问nginx⻚⾯为例,步骤如下: | ||
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1. ⽹络拓扑参考如下: | ||
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![topology](pics\topology.png) | ||
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2. 修改python测试脚本: | ||
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``` | ||
# cat astf/nginx_wget.py | ||
from trex.astf.api import * | ||
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class Prof1(): | ||
def get_profile(self, **kwargs): | ||
# ip generator | ||
ip_gen_c = ASTFIPGenDist(ip_range = ["10.142.165.100", "10.142.165.131"], | ||
distribution="seq") | ||
ip_gen_s = ASTFIPGenDist(ip_range = ["10.142.166.100", "10.142.166.131"], | ||
distribution="seq") | ||
ip_gen = ASTFIPGen(glob = ASTFIPGenGlobal(ip_offset="1.0.0.0"), | ||
dist_client = ip_gen_c, | ||
dist_server = ip_gen_s) | ||
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return ASTFProfile(default_ip_gen = ip_gen, | ||
cap_list = [ASTFCapInfo(file = 'nginx.pcap', | ||
cps = 1)]) | ||
def register(): | ||
return Prof1() | ||
``` | ||
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3. 以astf模式开启trex服务: | ||
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``` | ||
# ./t-rex-64 -i --astf | ||
``` | ||
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4. 另外开终端,打开trex-console: | ||
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``` | ||
# ./trex-console | ||
``` | ||
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5. 执⾏start命令模拟wget访问nginx服务: | ||
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``` | ||
![tui](E:\code\github\dpvs\doc\pics\tui.png)trex>start -f astf/nginx_wget.py -m 90000 -d 1000 | ||
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Loading traffic at acquired ports. [SUCCESS] | ||
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Starting traffic. [SUCCESS] | ||
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31.48 [ms] | ||
``` | ||
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6. 执⾏tui命令在后台监控流量情况,可以看到带宽基本都被打满(tx:10.01Gbps,rx:9.92Gbps): | ||
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![tui](pics\tui.png) | ||
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**Stateless测试** | ||
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Stateless是基于构包和发包两个阶段来完成, 构包完全基于python的scapy库,⽽发包则是其⾃开发的trex_stl_lib来完 成。 | ||
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1. Stateless测试默认⽀持GUI模式,既远程通过界⾯配置trex,⾸先需要安装客户端,下载链接如下: | ||
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https://github.com/cisco-system-traffic-generator/trex-stateless-gui/releases | ||
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2. 在服务端以交互模式开启t-rex-64: | ||
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``` | ||
# t-rex-64 -i | ||
``` | ||
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3. 打开客户端界⾯,连接trex服务: ![trex-gui1](pics\trex-gui1.png) | ||
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4. 这边port0跟port1分别对应dpdk绑定的⽹卡端⼝,发包在0端⼝发,1端⼝收: ![trex-gui2](pics\trex-gui2.png) | ||
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5. 点进port,开启Service模式,并强制获取配置权限: | ||
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![trex-gui3](pics\trex-gui3.png) | ||
There was a problem hiding this comment. Choose a reason for hiding this commentThe reason will be displayed to describe this comment to others. Learn more. the pics link is invalid There was a problem hiding this comment. Choose a reason for hiding this commentThe reason will be displayed to describe this comment to others. Learn more. done |
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6. 进Configuration菜单,设置端⼝ip及⽹关,点击Apply,如果⽹关地址arp解析成功说明配置正确: | ||
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![trex-gui4](pics\trex-gui4.png) | ||
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7. 新建profile配置,带宽100%,添加udp⼩包(64字节)测试项: | ||
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![trex-gui5](pics\trex-gui5.png) | ||
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![trex-gui6](pics\trex-gui6.png) | ||
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![trex-gui7](pics\trex-gui7.png) | ||
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8. 右击profile,执⾏play动作进⾏发包压测: | ||
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![trex-gui8](pics\trex-gui8.png) | ||
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9. 查看stat监控,如果TX跟RX的pps基本保持⼀致,说明丢包率较低,以下截图中测试结果是在万兆⽹卡上压测数 据,pps为14Mpps说明已经接近100%线速,这是最理想的数据: | ||
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![trex-gui9](pics\trex-gui9.png) | ||
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![trex-gui10](pics\trex-gui10.png) | ||
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**参考链接:** | ||
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https://trex-tgn.cisco.com/trex/doc/index.html | ||
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https://github.com/cisco-system-traffic-generator/trex-core/wiki | ||
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https://trex-tgn.cisco.com/trex/doc/trex_faq.html |
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