当 EB 环境为 python 3.6 时，使用 python 2.7 安装要求时出现 AWS 错误

Question

如何让 AWS EB 实例使用实例上已安装的 python 3 版本？ 我无法获得运行 Python 3.6 运行 Django 2.1+ 的新环境。

本地（不在虚拟环境中）：

which python -> /usr/local/bin/python
python -V -> Python 2.7.15
which python3 -> /usr/local/bin/python3
python3 -V -> Python 3.6.5
which pip -> /usr/local/bin/pip
pip -V -> pip 18.0 from /usr/local/lib/python3.6/site-packages/pip (python 3.6)`
which pip3 -> /usr/local/bin/pip3
pip3 -V -> pip 18.0 from /usr/local/lib/python3.6/site-packages/pip (python 3.6)

本地在 virtualenv mstFirst中：

which python -> /Users/me/.virtualenvs/mstFirst/bin/python
which python3 -> /Users/me/.virtualenvs/mstFirst/bin/python
python -V -> Python 3.6.5
python3 -V -> Python 3.6.5
which pip -> /Users/me/.virtualenvs/mstFirst/bin/pip
which pip3 -> /Users/me/.virtualenvs/mstFirst/bin/pip3
pip -V -> pip 18.0 from /Users/me/.virtualenvs/mstFirst/lib/python3.6/site-packages/pip (python 3.6)
pip3 -V -> pip 18.0 from /Users/me/.virtualenvs/mstFirst/lib/python3.6/site-packages/pip (python 3.6)
aws --version -> aws-cli/1.16.9 Python/3.6.5 Darwin/17.7.0 botocore/1.11.9
eb --version -> EB CLI 3.14.4 (Python 3.6.5)
eb -list -> * mst-p3
eb -config ->
  ApplicationName: mst
  DateUpdated: 2018-09-07 02:15:51+00:00
  EnvironmentName: mst-p3
  PlatformArn: arn:aws:elasticbeanstalk:us-east-1::platform/Python 3.6 running on 64bit Amazon Linux/2.7.3
  settings: …

文件：

“.elasticbeanstalk/config.yml”

branch-defaults:
  master:
    environment: mst-p3
environment-defaults:
  mst-p3: …
global:
  application_name: mst
  default_platform: 64bit Amazon Linux 2018.03 v2.7.3 running Python 3.6
  default_region: us-east-1
  workspace_type: Application
…

“.ebextensions/01_packages.config”

packages:
  yum:
    git: []
    python36: []
    python36-devel: []
    postgresql93: []
    postgresql93-devel: []
    mod24_ssl : []

commands:
  pip_upgrade:
    command: /opt/python/run/venv/bin/pip install --upgrade pip
    ignoreErrors: false

尝试eb deploy时出错，它在尝试运行pip install -r requirements.py时指向错误的 python 版本 (2.7)：

Command "python setup.py egg_info" failed with error code 1 in /tmp/pip-install-jt3_s4in/slugger/
2018-09-07 03:28:35,315 ERROR    Error installing dependencies: Command '/opt/python/run/venv/bin/pip install -r /opt/python/ondeck/app/requirements.txt' returned non-zero exit status 1
Traceback (most recent call last):
  File "/opt/elasticbeanstalk/hooks/appdeploy/pre/03deploy.py", line 22, in main
    install_dependencies()
  File "/opt/elasticbeanstalk/hooks/appdeploy/pre/03deploy.py", line 18, in install_dependencies
    check_call('%s install -r %s' % (os.path.join(APP_VIRTUAL_ENV, 'bin', 'pip'), requirements_file), shell=True)
  File "/usr/lib64/python2.7/subprocess.py", line 186, in check_call
    raise CalledProcessError(retcode, cmd)
CalledProcessError: Command '/opt/python/run/venv/bin/pip install -r /opt/python/ondeck/app/requirements.txt' returned non-zero exit status 1 (Executor::NonZeroExitStatus)

远程实例 ssh ( eb ssh ) ：

pyhthon -V -> Python 2.7.14
pyhthon3 -V -> Python 3.6.5

我尝试过的事情：

• 用当前版本替换环境 AMI 并根据https://stackoverflow.com/a/47157777/1234721进行重建，但是对于“Amazon Linux AMI 2018.03.0 (HVM)”AMI 为“ami-0ff8a91507f77f867”的环境错误， SSD卷类型”
• 尝试连接到 YAML 配置以切换 python 版本
• 使用eb init重新初始化
• 验证了我的 ssh 个密钥： https://stackoverflow.com/a/51669982/1234721

Answer 1

使用eb init绝对有效：

eb init -p "64bit Amazon Linux 2017.09 v2.7.3 running Python 3.6" ...

然后，只需从.ebextension文件中删除所有python内容.ebextension 。

对于yum section ，我所使用的是：

packages:
  yum:
    postgresql94-devel: []

应该没有必要升级点数。

Answer 2

您的问题是由Python 2.7安装中的pip版本错误（Python 3.x pip）引起的。

AWS工具是为Python 2.7编写的

我也不确定aws cli或eb是否已通过pip 18进行了完整测试。

从Python 2目录中卸载pip。 卸载eb

重新安装。

我建议即使不使用AWS CLI，也要先安装它。 这将确保您的Python环境对于AWS工具而言设置正确。

您没有指定操作系统，因此我无法为您提供特定于操作系统的卸载/安装说明。

Answer 3

尝试：

• 备份和删除.elasticbeanstalk/config.yml
• 运行：eb init 然后你可以在 eb init 中运行 select python 版本 3.6