varnish-4.x VTL--varnishtest

varnish-4.x VTL--varnishtest

The Varnish Test Case (VTC) Language

• Test against simulated or real backends

• Starts real instance of varnishd

• Simulates clients

• Asserts using expect

如下：是一个测试例子,保存为foo.vtc

varnishtest "Varnish as Proxy"

server s1 {

    rxreq

    txresp

} -start

server s2 {

    rxreq

    txresp

}

server s2 start

varnish v1 -arg "-b 192.168.192.10:8080" -start

varnish v2 -arg "-b ${s1_addr}:${s1_port}" -start

client c1 {

    txreq

    rxresp

    expect resp.http.via ~ "varnish"

} -run

client c2 {

    txreq

    rxresp

    expect resp.http.via ~ "varnish"

} -run

client c3 {

    txreq

    rxresp

    expect resp.http.via ~ "varnish"

}

client c3 run

1.VTC程序都以test命名开头

varnishtest "Varnish as Proxy"

2.定义模拟若干真实的后端origin server

s1,s2等命名都必须以s开头，字面意思上就可以看出，s1,s2接受一个请求rxreq,传输应答txresp,${s1_addr}:${s1_port}定义后端server的地址和端口，可以是真实的后端地址及端口,server启动可简写可新行完整申明

3.定义模拟若干varnish server

4.定义模拟若干client

varnish是完全为现代硬件架构和操作系统设计，多线程，所以几个角色(server,varnish,client)可能启动先后顺序会有一定影响，所以又提供了-wait参数

-run

-start

-wait

有兴趣的朋友可以试下如下，VTL

示例2

varnishtest "Synchronized"

server s1 {

    rxreq

    txresp

}

server s1 -start

client c1 -connect ${s1_sock} {

    txreq

    rxresp

}

# -run: -start - wait

client c1 -run

server s1 -wait

示例3

varnishtest "Unsynchronized"

server s1 {

    rxreq

    txresp

}

server s1 -start -wait

client c1 -connect ${s1_sock} {

    txreq

    rxresp

}

client c1 -run

root@config-p:~#varnishtest t2.vtc 

**** top   0.0 macro def varnishd=varnishd

**** top   0.0 macro def varnishadm=varnishadm

**** top   0.0 macro def varnishstat=varnishstat

**** top   0.0 macro def varnishhist=varnishhist

**** top   0.0 macro def varnishlog=varnishlog

**** top   0.0 macro def varnishncsa=varnishncsa

**** top   0.0 macro def vmod_std=std

**** top   0.0 macro def vmod_debug=debug

**** top   0.0 macro def vmod_directors=directors

**** top   0.0 macro def pwd=/root

**** top   0.0 macro def bad_ip=192.0.2.255

**** top   0.0 macro def tmpdir=/tmp/vtc.84399.1a833cf5

*    top   0.0 TEST t2.vtc starting

***  top   0.0 varnishtest

*    top   0.0 TEST Unsynchronized

***  top   0.0 server

***  top   0.0 server

**   s1    0.0 Starting server

**** s1    0.0 macro def s1_addr=127.0.0.1

**** s1    0.0 macro def s1_port=36877

**** s1    0.0 macro def s1_sock=127.0.0.1 36877

*    s1    0.0 Listen on 127.0.0.1 36877

**   s1    0.0 Waiting for server

**   s1    0.0 Started on 127.0.0.1 36877

#     top  TEST t2.vtc FAILED (60.007) signal=9 exit=0

失败是因为等待s1返回超时

测试命令

varnishtest foo.vtc [-v]