django - 工具错误 : Command 01_migrate failed on Amazon LM2

Question

我正在尝试将在 django 上制作的 web 应用程序部署到 AWS Elastic BeanStalk，但它显示以下错误:

cfnbootstrap.construction_errors.ToolError: Command 01_migrate failed

追溯:

2021-08-04 09:49:56,443 [ERROR] -----------------------BUILD FAILED!------------------------
2021-08-04 09:49:56,443 [ERROR] Unhandled exception during build: Command 01_migrate failed
Traceback (most recent call last):
  File "/opt/aws/bin/cfn-init", line 176, in <module>
    worklog.build(metadata, configSets)
  File "/usr/lib/python3.7/site-packages/cfnbootstrap/construction.py", line 135, in build
    Contractor(metadata).build(configSets, self)
  File "/usr/lib/python3.7/site-packages/cfnbootstrap/construction.py", line 561, in build
    self.run_config(config, worklog)
  File "/usr/lib/python3.7/site-packages/cfnbootstrap/construction.py", line 573, in run_config
    CloudFormationCarpenter(config, self._auth_config).build(worklog)
  File "/usr/lib/python3.7/site-packages/cfnbootstrap/construction.py", line 273, in build
    self._config.commands)
  File "/usr/lib/python3.7/site-packages/cfnbootstrap/command_tool.py", line 127, in apply
    raise ToolError(u"Command %s failed" % name)
cfnbootstrap.construction_errors.ToolError: Command 01_migrate failed

db-migrate.config
在 LM1 上是:

container_commands:
  01_migrate:
    command: "django-admin.py migrate --noinput"
    leader_only: true
option_settings:
  aws:elasticbeanstalk:application:environment:
    DJANGO_SETTINGS_MODULE: packsapp.settings

对于 LM2 我试过这个:

container_commands:
    01_migrate:
        command: "source /var/app/venv/*/bin/activate && python3 manage.py migrate"
        leader_only: true
option_settings:
  aws:elasticbeanstalk:application:environment:
    DJANGO_SETTINGS_MODULE: packsapp.settings

也试过这个

container_commands:
  01_migrate:
    command: "source /var/app/venv/*/bin/activate && django-admin.py migrate --noinput"
    leader_only: true
option_settings:
  aws:elasticbeanstalk:application:environment:
    DJANGO_SETTINGS_MODULE: packsapp.settings

但它仍然失败。我需要改变什么？

Answer 1

正如前面的回答中提到的，Amazon Linux 2 (AL2) 与 Amazon Linux 1 (AL1) 有很大不同——更令人沮丧的是，AWS 文档没有提供准确的迁移方法。经过数小时的挖掘，这是我发现有效的方法:
Hook
AL2 介绍 hooks作为在部署的不同阶段运行 shell 命令的一种方法。我们正在寻找的钩子(Hook)是 postdeploy Hook 如下图:
首先，我们的目录结构应该是这样的:

my_project
|-- .platform/
|    |-- hooks/              
|        |-- postdeploy/
|            |-- 01_migrate.sh
|-- my_first_app
|-- my_second_app

接下来，我们添加 01_migrate.sh仅在领导者上执行的脚本:

#!/bin/bash

source "$PYTHONPATH/activate" && {
    
    if [[ $EB_IS_COMMAND_LEADER == "true" ]];
    then 
        # log which migrations have already been applied
        python manage.py showmigrations;
        
        # migrate
        python manage.py migrate --noinput;
    else 
        echo "this instance is NOT the leader";
    fi
    
}

日志
如果配置正确，我们将看到在 /var/log/eb-hooks.log 下打印的迁移eb 日志的部分(即运行 eb logs):

----------------------------------------
/var/log/eb-hooks.log
----------------------------------------
my_first_app
 [X] 0001_my_first_app_migration_1
 [X] 0002_my_first_app_migration_2
my_second_app
 [X] 0001_my_second_app_migration_1
 [X] 0002_my_second_app_migration_2

我们现在可以删除进行迁移的容器命令。
笔记

您需要将上面的shell文件添加到postdeploy在我看来，钩子(Hook)完全不直观

您可以添加其他 django 命令，例如 collectstatic (通常我只是将它包含在上面的文件中)

与 AL1 上的命令一样，shell 脚本“钩子(Hook)”按字母顺序执行(因此是 01 前缀)

祝你好运!