如何在Heroku上推送dockerized项目 [英] How to push a dockerized project on heroku

问题描述

希望你很好！

实际上，我有一个正在使用的dockerized rails API.我必须将其推到Heroku上.

Actually, I have a dockerized rails API I'm working on.& I have to push it on Heroku.

我将pg gem添加到我的生产环境中&将MySql gem移至开发环境

I add pg gem to my production environment & move MySql gem to the development environment

group :development, :test do
  # Call 'byebug' anywhere in the code to stop execution and get a   console
  gem 'byebug', platforms: [:mri, :mingw, :x64_mingw]
  # Adds support for Capybara system testing and selenium driver
  gem 'capybara', '~> 2.13'
  gem 'selenium-webdriver'
  gem 'mocha'
  gem 'webmock'
  gem 'mysql2'
  
end

group :production do
  gem 'pg', '1.2.3'
end

然后，我运行 docker-compose up --build &将代码推送到git后，我运行 git push heroku<分支名称> 一切正常.但是当我运行 heroku运行rails db:migrate 时，我得到了一个错误

And after that, I run docker-compose up --build & after pushing my code to git I run git push heroku <branch name> everything works fine. but when I run heroku run rails db:migrate i got an error

铁轨中止了！NoMethodError:无法加载数据库配置:nil:NilClass的未定义方法"[]"

rails aborted! NoMethodError: Cannot load database configuration: undefined method `[]' for nil:NilClass

这是我第一次在Heroku上推送dockerized项目，我不知道该怎么做.有人可以指导我吗?

This is my first time to push a dockerized project on Heroku, I don't know how to do this. can anyone please guide me?

推荐答案

在部署Docker容器Heroku时，您需要采用其他方法(当前您只是在推送代码 git push heroku master )

When deploying a Docker container Heroku you need to follow a different method (currently you are just pushing the code git push heroku master).

第一步:在本地构建Docker映像并对其进行测试.

First step: build your Docker image locally and test it.

# build image
docker build -t com.example/myapp .
# run container using mapping port 8886 to 8886
docker run -it --name myapp -p 8886:8886 com.example/myapp 

第二步:登录Heroku注册表(只需一次)

Second step: login into Heroku registry (only needed once)

heroku container:login

第三步:标记并推送

# tag to match Heroku naming template (this is example uses `web` Dyno)
docker tag com.example/myapp registry.heroku.com/myapp/web
docker push registry.heroku.com/myapp/web

最后一步:释放(也称为启动应用程序)

Final step: release (aka start the application)

heroku container:release web -a myapp

请参见 Heroku文档

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