當 EB 環境為 python 3.6 時，使用 python 2.7 安裝要求時出現 AWS 錯誤

Question

如何讓 AWS EB 實例使用實例上已安裝的 python 3 版本？ 我無法獲得運行 Python 3.6 運行 Django 2.1+ 的新環境。

本地（不在虛擬環境中）：

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

嘗試eb deploy時出錯，它在嘗試運行pip install -r requirements.py時指向錯誤的 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)

遠程實例 ssh ( eb ssh ) ：

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

我嘗試過的事情：

• 用當前版本替換環境 AMI 並根據https://stackoverflow.com/a/47157777/1234721進行重建，但是對於“Amazon Linux AMI 2018.03.0 (HVM)”AMI 為“ami-0ff8a91507f77f867”的環境錯誤， SSD卷類型”
• 嘗試連接到 YAML 配置以切換 python 版本
• 使用eb init重新初始化
• 驗證了我的 ssh 個密鑰： https://stackoverflow.com/a/51669982/1234721

Answer 1

使用eb init絕對有效：

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

然后，只需從.ebextension文件中刪除所有python內容.ebextension 。

對於yum section ，我所使用的是：

packages:
  yum:
    postgresql94-devel: []

應該沒有必要升級點數。

Answer 2

您的問題是由Python 2.7安裝中的pip版本錯誤（Python 3.x pip）引起的。

AWS工具是為Python 2.7編寫的

我也不確定aws cli或eb是否已通過pip 18進行了完整測試。

從Python 2目錄中卸載pip。 卸載eb

重新安裝。

我建議即使不使用AWS CLI，也要先安裝它。 這將確保您的Python環境對於AWS工具而言設置正確。

您沒有指定操作系統，因此我無法為您提供特定於操作系統的卸載/安裝說明。

Answer 3

嘗試：

• 備份和刪除.elasticbeanstalk/config.yml
• 運行：eb init 然后你可以在 eb init 中運行 select python 版本 3.6