无法在python AWS Lambda函数中运行二进制文件 [英] Can't run binary from within python aws lambda function

问题描述

我正在尝试在lambda函数中运行此工具: https://github.com/nicolas-f/7DTD-传单

I am trying to run this tool within a lambda function: https://github.com/nicolas-f/7DTD-leaflet

该工具取决于Pillow，后者取决于AWS lambda容器中不可用的映像库.为了解决这个问题，我运行了pyinstaller来创建可以希望执行的二进制文件.该文件名为map_reader，位于lambda zip软件包的顶层.

The tool depends on Pillow which depends on imaging libraries not available in the AWS lambda container. To try and get round this I've ran pyinstaller to create a binary that I can hopefully execute. This file is named map_reader and sits at the top level of the lambda zip package.

以下是我用来尝试运行该工具的代码:

Below is the code I am using to try and run the tool:

command = 'chmod 755 map_reader'
args = shlex.split(command)
print subprocess.Popen(args)

command = './map_reader -g "{}" -t "{}"'.format('/tmp/mapFiles', '/tmp/tiles')
args = shlex.split(command)
print subprocess.Popen(args)

这是错误，它在第二个subprocess.Popen调用中发生:

And here is the error, which occurs on the second subprocess.Popen call:

<subprocess.Popen object at 0x7f08fa100d10>
[Errno 13] Permission denied: OSError

如何正确运行此程序?

How can I run this correctly?

推荐答案

您可能被误导了问题的根源所在.

You may have been misled into what the issue actually is.

我不认为第一个Popen运行成功.我认为它只是在标准错误中转储了一条消息，而您却没有看到它.可能是说

I don't think that the first Popen ran successfully. I think that it just dumped a message in standard error and you're not seeing it. It's probably saying that

chmod: map_reader: No such file or directory

我建议您可以尝试以下2种方法之一:

I suggest you can try either of these 2:

1. 从包中提取map_reader到/tmp中.然后用/tmp/map_reader引用它.
2. 按照AWS Lambda总经理Tim Wagner的建议进行操作，他在文章

1. Extract the map_reader from the package into /tmp. Then reference it with /tmp/map_reader.
2. Do it as recommended by Tim Wagner, General Manager of AWS Lambda who said the following in the article Running Arbitrary Executables in AWS Lambda:

包含您自己的可执行文件很容易；只需将它们打包在您上载的ZIP文件中，然后在从Node.js或以前启动的其他进程中调用它们时就引用它们(包括创建的ZIP文件中的相对路径).确保在功能代码的开头包括以下内容:

process.env[‘PATH’] = process.env[‘PATH’] + ‘:’ + process.env[‘LAMBDA_TASK_ROOT’]

上面的代码适用于Node JS，但适用于Python，就像下面的

The above code is for Node JS but for Python, it's like the following

import os os.environ['PATH']

import os os.environ['PATH']

这应该使命令command = './map_reader <arguments>起作用.

如果它们仍然不起作用，您还可以考虑在创建包并上传之前先chmod 755 map_reader 运行(如建议

If they still don't work, you may also consider running chmod 755 map_reader before creating the package and uploading it (as suggested in this other question).

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