在Heroku上部署（托管）你的Rails应用
Heroku 是Ruby on Rails的托管提供商，提供运行Ruby on Rails应用的整套环境。和传统的托管商相比，他并不仅仅是提供一个服务器给你，而且提供有趣的工具和接口来帮助你更加容易的工作，使你从繁重的安装、配置、管理和保证服务器安全中解脱出来。 Heroku是用git来管理项目的，另外还要用到ssh来登录，这两个工具在Linux环境下的安装方法如下： git安装
ssh安装
当然要使用Heroku，你就要到其 官方网 注册一个账号； 以上工作完成后，并可进行如下操作，将你的Rails应用托管到Heroku：
以来内容转自： http://hi.baidu.com/haifreeidea/blog/item/e09279c53b7d06c338db49c9.html
①、＄ gem install heroku
②、先要生成一个公钥，使用命令: $ ssh-keygen -t rsa Generating public/private rsa key pair. Enter file in which to save the key (/home/user/.ssh/id_rsa): Enter passphrase (empty for no passphrase): Enter same passphrase again: Your identification has been saved in /home/user/.ssh/id_rsa. Your public key has been saved in /home/user/.ssh/id_rsa.pub. The key fingerprint is: a6:88:0a:bb:74:70:c6:e0:d5:49:65:e3:04:d5:6c:3e user@workstation.local
把公钥加入到Heroku $ heroku keys:add Uploading ssh public key /home/user/.ssh/id_rsa.pub
如果想删除公钥，可以用命令： $ heroku keys:remove user@workstation.local
查看公钥，用命令： $ heroku keys
③、现在就可以创建一个项目了(预先要安装好rails)。 $ rails myapp (如果是已有的应用，这一步可以跳过)
$ cd myapp $ git init $ git add . $ git commit -m “my first commit” Created initial commit 5df2d09: my first commit 44 files changed, 8393 insertions(+), 0 deletions(–) create mode 100644 README create mode 100644 Rakefile create mode 100644 app/controllers/application.rb …
In heroku how to control the ruby version
Usage: heroku stack
show the list of available stacks
—all # include deprecated stacks
Additional commands, type “heroku help COMMAND” for more details:
stack:migrate STACK # prepare migration of this app to a new stack
use heroku create —stack to creat the stack
heroku create —stack bamboo-ree-1.8.7
④、把这个项目创建到Heroku上。 ＄ heroku create myapp Enter your Heroku credentials. Email: user@example.com Password: Uploading ssh public key /home/user/.ssh/id_rsa.pub （当第一次运行heroku命令时，要求输入Email，password，这个是你在Heroku注册的Email和密码，以便创建~/.heroku/credentials文件，这个文件记录了你输入的用户名和密码，以后就不再需要输入了。）
⑤、接下来运行： $ git push heroku master Counting objects: 65, done. Compressing objects: 100% (58/58), done. Writing objects: 100% (65/65), 80.54 KiB, done. Total 65 (delta 14), reused 0 (delta 0)
——–> Heroku receiving push ——–> Rails app detected Compiled slug size is 0.1MB ——–> Launching……. done App deployed to Heroku
To git@heroku.com:vivid-mountain-91.git * [new branch] master –> master
⑥、再做一个数据库迁移： $ heroku rake db:migrate
现在就可以像平常使用Rails一样编写程序了。
更新代码可以用： $ git push heroku
The rake db:reset task is not supported. Heroku apps do not have permission to drop and create databases. Use the heroku pg:reset command instead.
将本地数据更新到Heroku网站上: $ heroku db:push （这个命令会使用taps，如果没有安装，请先安装。）
要打开网页浏览，就可以用 $ heroku open
Permission denied (publickey) when deploying heroku code. fatal: The remote end hung up unexpectedly
jhjguxin@jhjguxin-virtual-machine:~/heroku_enki$ git push heroku master Permission denied (publickey). fatal: The remote end hung up unexpectedly jhjguxin@jhjguxin-virtual-machine:~/heroku_enki$ heroku keys:add ~/.ssh/id_rsa.pub Uploading ssh public key /home/jhjguxin/.ssh/id_rsa.pub jhjguxin@jhjguxin-virtual-machine:~/heroku_enki$ git push heroku masterCounting objects: 460, done. Delta compression using up to 2 threads. Compressing objects: 100% (418/418), done. Writing objects: 100% (460/460), 447.32 KiB | 141 KiB/s, done. Total 460 (delta 55), reused 0 (delta 0)
about db
To ease deployment of typical Rails applications, Heroku automatically generates a new database.yml file on deployment. This auto-generated database.yml file configures your RACK_ENV environment to your selected postgres db. This enables you to simply push a Rails app up to Heroku and have it automatically connect to your database.
I had the same problem, and although I did not solve the problem, I found a workaround.
Instead of using:
heroku run rake db:migrate
You can use:
heroku run:detached rake db:migrate
This runs the command in the background, writing the output to the log. When it is finished you can view the log for the result.
自己生成的git地址不好看，最好在本地改
- heroku rename newname
帐号下改完要
- $ git remote rm heroku
- $ git remote add heroku git@heroku.com:newname.git