Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Add the trex tutorial document #559

Open
wants to merge 11 commits into
base: devel
Choose a base branch
from
Open
Show file tree
Hide file tree
Changes from 8 commits
Commits
File filter

Filter by extension

Filter by extension

Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
276 changes: 276 additions & 0 deletions doc/Trex tutorial document.md
Original file line number Diff line number Diff line change
@@ -0,0 +1,276 @@
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。

**T-Rex 特性**

1. Stateful

- 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

- ⽀持时延和抖动,⽀持NAT/PAT⾃动学习,⽀持L4~L7

2. Stateless

- 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

**安装**

1. 下载最新v2.56版本:

```
# 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/
```

2. 编译源码:

```
# yum install gcc gcc-c++ kernel-devel
# cd linux_dpdk/
# ./b configure
# ./b build
# cd ../linux
# ./b configure
# ./b build
```

3. 修改配置⽂件,绑定测试端⼝:

```
# 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]
```

4. 启动t-rex服务

```
# cd ../scripts
# ./t-rex-64 -i
```

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:

```
# ./trex-console
trex>service

Enabling service mode on port(s) [0, 1]: [SUCCESS]

8.51 [ms]

trex(service)>arp

Resolving destination on port(s) [0, 1]: [SUCCESS]

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

443.34 [ms]
```

6. 执⾏ping测试⽹关连通性:

```
trex(service)>ping -p 0 -d 10.142.116.254

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

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**
```

**Stateful**

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。

1. 设置端⼝与DUT相连,修改trex配置:

```
![pcap](E:\code\github\dpvs\doc\pics\pcap.png)# cat /etc/trex_cfg.yaml
Copy link
Contributor

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

  • Wrong link position; move out of code block
  • Invalid link URL

- 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
```

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)

3. 新增yaml设定,内容参考如下:

```
# 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
```

4. 执⾏trex命令测试:

```
# ./t-rex-64 -f http_test.yaml -d 100 -m 100 -v 7
```

**ASTF**

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:

1. ⽹络拓扑参考如下:

![topology](pics\topology.png)

2. 修改python测试脚本:

```
# cat astf/nginx_wget.py
from trex.astf.api import *

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)

return ASTFProfile(default_ip_gen = ip_gen,
cap_list = [ASTFCapInfo(file = 'nginx.pcap',
cps = 1)])
def register():
return Prof1()
```

3. 以astf模式开启trex服务:

```
# ./t-rex-64 -i --astf
```

4. 另外开终端,打开trex-console:

```
# ./trex-console
```

5. 执⾏start命令模拟wget访问nginx服务:

```
![tui](E:\code\github\dpvs\doc\pics\tui.png)trex>start -f astf/nginx_wget.py -m 90000 -d 1000
Copy link
Contributor

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

  • The link should be moved out of code block
  • The link URL is invalid


Loading traffic at acquired ports. [SUCCESS]

Starting traffic. [SUCCESS]

31.48 [ms]
```

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):

![tui](pics\tui.png)

**Stateless测试**

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。

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:

https://github.com/cisco-system-traffic-generator/trex-stateless-gui/releases

2. 在服务端以交互模式开启t-rex-64:

```
# t-rex-64 -i
```

3. 打开客户端界⾯,连接trex服务: ![trex-gui1](pics\trex-gui1.png)

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)

5. 点进port,开启Service模式,并强制获取配置权限:

![trex-gui3](pics\trex-gui3.png)
Copy link
Collaborator

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

the pics link is invalid

Copy link
Author

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

done


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:

![trex-gui4](pics\trex-gui4.png)

7. 新建profile配置,带宽100%,添加udp⼩包(64字节)测试项:

![trex-gui5](pics\trex-gui5.png)

![trex-gui6](pics\trex-gui6.png)

![trex-gui7](pics\trex-gui7.png)

8. 右击profile,执⾏play动作进⾏发包压测:

![trex-gui8](pics\trex-gui8.png)

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:

![trex-gui9](pics\trex-gui9.png)

![trex-gui10](pics\trex-gui10.png)

**参考链接:**

https://trex-tgn.cisco.com/trex/doc/index.html

https://github.com/cisco-system-traffic-generator/trex-core/wiki

https://trex-tgn.cisco.com/trex/doc/trex_faq.html
Binary file added doc/pics/pcap.png
Loading
Sorry, something went wrong. Reload?
Sorry, we cannot display this file.
Sorry, this file is invalid so it cannot be displayed.
Binary file added doc/pics/topology.png
Loading
Sorry, something went wrong. Reload?
Sorry, we cannot display this file.
Sorry, this file is invalid so it cannot be displayed.
Binary file added doc/pics/trex-gui1.png
Loading
Sorry, something went wrong. Reload?
Sorry, we cannot display this file.
Sorry, this file is invalid so it cannot be displayed.
Binary file added doc/pics/trex-gui10.png
Loading
Sorry, something went wrong. Reload?
Sorry, we cannot display this file.
Sorry, this file is invalid so it cannot be displayed.
Binary file added doc/pics/trex-gui2.png
Loading
Sorry, something went wrong. Reload?
Sorry, we cannot display this file.
Sorry, this file is invalid so it cannot be displayed.
Binary file added doc/pics/trex-gui3.png
Loading
Sorry, something went wrong. Reload?
Sorry, we cannot display this file.
Sorry, this file is invalid so it cannot be displayed.
Binary file added doc/pics/trex-gui4.png
Loading
Sorry, something went wrong. Reload?
Sorry, we cannot display this file.
Sorry, this file is invalid so it cannot be displayed.
Binary file added doc/pics/trex-gui5.png
Loading
Sorry, something went wrong. Reload?
Sorry, we cannot display this file.
Sorry, this file is invalid so it cannot be displayed.
Binary file added doc/pics/trex-gui6.png
Loading
Sorry, something went wrong. Reload?
Sorry, we cannot display this file.
Sorry, this file is invalid so it cannot be displayed.
Binary file added doc/pics/trex-gui7.png
Loading
Sorry, something went wrong. Reload?
Sorry, we cannot display this file.
Sorry, this file is invalid so it cannot be displayed.
Binary file added doc/pics/trex-gui8.png
Loading
Sorry, something went wrong. Reload?
Sorry, we cannot display this file.
Sorry, this file is invalid so it cannot be displayed.
Binary file added doc/pics/trex-gui9.png
Loading
Sorry, something went wrong. Reload?
Sorry, we cannot display this file.
Sorry, this file is invalid so it cannot be displayed.
Binary file added doc/pics/tui.png
Loading
Sorry, something went wrong. Reload?
Sorry, we cannot display this file.
Sorry, this file is invalid so it cannot be displayed.