为了让你的设备接入Shifu。我们用Go编写了一个简单的HTTP到 PowerShell 的中间件,供开发者使用。
这个HTTP到PowerShell的中间件是这样设计的:
将HTTP请求体代理到PowerShell shell并执行
接受HTTP请求体中的一切内容,并在规定超时时间内执行。
386
GOOS=windows GOARCH=386 go build -a -o http2powershell.exe cmd/httpstub/powershellstub/powershellstub.go
amd64
GOOS=windows GOARCH=amd64 go build -a -o http2powershell.exe cmd/httpstub/powershellstub/powershellstub.go
该可执行文件需要配置以下环境变量:
EDGEDEVICE_DRIVER_HTTP_PORT
(可选)
11112
。EDGEDEVICE_DRIVER_EXEC_TIMEOUT_SECOND
(可选)
timeout <seconds>
来实现。Windows
主机的操作:如果要运行中间件,请双击http2powershell.exe
,默认情况下,中间件会在0.0.0.0
上监听11112
端口。
使用/examples/simple-powershell-stub
中提供的样本部署文件。
在shifu
的根目录下发布:
kubectl apply -f driver_util/http-to-powershell-stub/examples/Simple-powershell-stub
使用curl
向Windows
主机发布请求:
root@nginx:/# curl "edgedevice-powershell/issue_cmd?flags_no_parameter=ls,C:" Directory: C:\ Mode LastWriteTime Length Name ---- ------------- ------ ---- d----- 6/5/2021 8:10 PM PerfLogs d-r--- 6/9/2022 2:48 PM Program Files d-r--- 4/29/2022 8:02 PM Program Files (x86) d-r--- 4/16/2022 1:46 AM Users d----- 6/9/2022 2:48 PM Windows d----- 4/17/2022 5:23 PM xampp root@nginx:/# curl "edgedevice-powershell/issue_cmd?flags_no_parameter=ping,8.8.8.8" Pinging 8.8.8.8 with 32 bytes of data: Reply from 8.8.8.8: bytes=32 time=64ms TTL=114 Reply from 8.8.8.8: bytes=32 time=56ms TTL=114 Reply from 8.8.8.8: bytes=32 time=57ms TTL=114 Reply from 8.8.8.8: bytes=32 time=59ms TTL=114 Ping statistics for 8.8.8.8: Packets: Sent = 4, Received = 4, Lost = 0 (0% loss), Approximate round trip times in milli-seconds: Minimum = 56ms, Maximum = 64ms, Average = 59ms
当使用curl
向一个给定的URL发布请求时,命令如下:
curl "example.com/issue_cmd?flags_no_parameter=ping,8.8.8.8
。
然后请求将从HTTP的中间件传到Windows
主机的PowerShell
。
> powershell.exe ping 8.8.8.8
。
请注意,默认的定时EDGEDEVICE_DRIVER_EXEC_TIMEOUT_SECOND
可以被URL中的timeout
标志所覆盖,例如:
timeout
标志(命令超时,输出不完整):root@nginx:/# curl "example.com/issue_cmd?flags_no_parameter=ping,-n,6,8.8.8.8" Pinging 8.8.8.8 with 32 bytes of data: Reply from 8.8.8.8: bytes=32 time=58ms TTL=114 Reply from 8.8.8.8: bytes=32 time=51ms TTL=114 Reply from 8.8.8.8: bytes=32 time=59ms TTL=114 Reply from 8.8.8.8: bytes=32 time=45ms TTL=114 Reply from 8.8.8.8: bytes=32 time=59ms TTL=114
timeout
标志(输出完整):root@nginx:/# curl "example.com/issue_cmd?timeout=10&flags_no_parameter=ping,-n,6,8.8.8.8" Pinging 8.8.8.8 with 32 bytes of data: Reply from 8.8.8.8: bytes=32 time=60ms TTL=114 Reply from 8.8.8.8: bytes=32 time=60ms TTL=114 Reply from 8.8.8.8: bytes=32 time=59ms TTL=114 Reply from 8.8.8.8: bytes=32 time=59ms TTL=114 Reply from 8.8.8.8: bytes=32 time=59ms TTL=114 Reply from 8.8.8.8: bytes=32 time=60ms TTL=114 Ping statistics for 8.8.8.8: Packets: Sent = 6, Received = 6, Lost = 0 (0% loss), Approximate round trip times in milli-seconds: Minimum = 59ms, Maximum = 60ms, Average = 59ms
我们还添加了一个参数stub_toleration
来处理deviceShifu和中间件之间的延迟问题。默认情况下,它被设置为1
秒,你可以用以下方法覆盖这个时间:
root@nginx:/# curl "example.com/issue_cmd?timeout=10&flags_no_parameter=ping,-n,6,8.8.8.8&stub_toleration=0"
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