在 Amazon Linux 2 上安装 AWS CDK

Question

根据here的说明，应该可以在CloudFormation中安装Python开发的CDK包。

我在 eu-west-2 中使用 t2.micro Amazon Linux 2：ami-0dd555eb7eb3b7c82 只是为了完整性。

说明状态运行此：python -m pip install aws-cdk-lib "/usr/bin/python: No module named pip" 失败了，但是用 python3 替换 python 解决了这个问题安装完成并显示以下消息：

Installing collected packages: attrs, typing-extensions, cattrs, six, python-dateutil, jsii, publication, constructs, aws-cdk-lib
Successfully installed attrs-21.4.0 aws-cdk-lib-2.13.0 cattrs-1.10.0 constructs-10.0.69 jsii-1.54.0 publication-0.0.3 python-dateutil-2.8.2 six-1.16.0 typing-extensions-4.1.1

此外，当在 python3 解释器中执行 >>>help('modules') 现在显示 aws_cdk - 因此我假设一切都很好！

说明表明下一步是使用导入运行 python - 所以我创建了这个：

#!/usr/bin/python3

import aws_cdk
print('hello')

但是，运行此返回很多的错误信息。我已经着手查看提到的文件并试图找出我做错了什么，但我已经走到了死胡同。我想知道是否有人有任何想法？

Traceback (most recent call last):
  File "/usr/lib64/python3.7/importlib/resources.py", line 188, in path
    yield Path(reader.resource_path(resource))
  File "/usr/local/lib/python3.7/site-packages/jsii/_runtime.py", line 43, in load
    _kernel.load(assembly.name, assembly.version, os.fspath(assembly_path))
  File "/usr/local/lib/python3.7/site-packages/jsii/_kernel/__init__.py", line 269, in load
    self.provider.load(LoadRequest(name=name, version=version, tarball=tarball))
  File "/usr/local/lib/python3.7/site-packages/jsii/_kernel/providers/process.py", line 338, in load
    return self._process.send(request, LoadResponse)
  File "/usr/local/lib/python3.7/site-packages/jsii/_utils.py", line 24, in wrapped
    stored.append(fgetter(self))
  File "/usr/local/lib/python3.7/site-packages/jsii/_kernel/providers/process.py", line 333, in _process
    process.start()
  File "/usr/local/lib/python3.7/site-packages/jsii/_kernel/providers/process.py", line 259, in start
    env=environ,
  File "/usr/lib64/python3.7/subprocess.py", line 800, in __init__
    restore_signals, start_new_session)
  File "/usr/lib64/python3.7/subprocess.py", line 1551, in _execute_child
    raise child_exception_type(errno_num, err_msg, err_filename)
FileNotFoundError: [Errno 2] No such file or directory: 'node': 'node'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "./l", line 3, in <module>
    import aws_cdk
  File "/usr/local/lib/python3.7/site-packages/aws_cdk/__init__.py", line 1051, in <module>
    from ._jsii import *
  File "/usr/local/lib/python3.7/site-packages/aws_cdk/_jsii/__init__.py", line 11, in <module>
    import constructs._jsii
  File "/usr/local/lib/python3.7/site-packages/constructs/__init__.py", line 41, in <module>
    from ._jsii import *
  File "/usr/local/lib/python3.7/site-packages/constructs/_jsii/__init__.py", line 12, in <module>
    "constructs", "10.0.69", __name__[0:-6], "constructs@10.0.69.jsii.tgz"
  File "/usr/local/lib/python3.7/site-packages/jsii/_runtime.py", line 43, in load
    _kernel.load(assembly.name, assembly.version, os.fspath(assembly_path))
  File "/usr/lib64/python3.7/contextlib.py", line 161, in __exit__
    raise RuntimeError("generator didn't stop after throw()")
RuntimeError: generator didn't stop after throw()
Exception ignored in: <function _NodeProcess.__del__ at 0x7f3fc99ebb90>
Traceback (most recent call last):
  File "/usr/local/lib/python3.7/site-packages/jsii/_kernel/providers/process.py", line 224, in __del__
    self.stop()
  File "/usr/local/lib/python3.7/site-packages/jsii/_kernel/providers/process.py", line 281, in stop
    if not self._process.stdin.closed:
AttributeError: '_NodeProcess' object has no attribute '_process'

我也有一台运行 Centos 的“家用机器”，并收到非常相似的消息。但是，我继续使用 ec2 实例来使问题更容易复制和记录。谢谢你。

Answer 1

谢谢“9769953” - 答案似乎是要使 AWS CDK python 库正常工作，您必须安装节点的依赖项。

这个article 也有帮助。

对于文档——这里是在 Amazon Linux 2 和其他类似的 Linux 发行版上为 python 安装 AWS CDK 的方法。

一种。安装节点版本管理器。

curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.37.2/install.sh | bash

b.激活 nvm。

. ~/.nvm/nvm.sh

C。安装节点。

nvm install node

d.检查版本（可选）。

node -v
npm -v

e.最后是蟒蛇位！

python3 -m pip install aws-cdk-lib

F。运行 Python 程序。

#!/usr/bin/python3
import aws_cdk
print('hello')

就是这样。

再次感谢“9769953”和“网络永恒”。

Answer 2

如链接页面所述，您应该首先安装 AWS CDK，这是通过 npm 完成的。这是node.js 包管理器；后者很可能是错误消息中提到的 'node'，因为它是通过 subprocess 运行的外部（可执行）文件。

所以首先安装node 和npm（它们可能一起出现），然后继续安装 Python AWS CDK。