如何根据Chef中的环境设置属性的值? [英] How can I set the value of an attribute based on the environment I am in in Chef?

问题描述

当我将更新推送到Chef服务器时，我的更新首先被推送到我们的开发节点，然后最终将它们合并到生产节点.

When I push my updates to the chef server, my updates first get pushed to our development node and then I eventually merge them to the production node.

我有两个设置为数据库URL的属性，但是，根据我是在开发节点上还是在生产节点上，这些属性的值是不同的.

I have two attributes that set to a URL for a database, however, the value of the attributes are different based on whether I am on the development node or the production node.

如何设置我的属性，以便根据其所处的环境来设置属性的值?

How can set my attributes so it sets the value of the attribute based on what environment it is in?

这就是我所拥有的:

default['test_cookbook']['Development']['URL]='jdbc:mysql://exampleDB1.com'
default['test_cookbook']['Production']['URL]='jdbc:mysql://exampleDB2.com'

理想情况下是生产"，而不是生产".和开发方面，我需要一些厨师资源，例如"node.chef_environment"它将检查环境并根据环境决定要使用的URL.

Ideally instead of "Production" and Development, I would want some chef resource like "node.chef_environment" that will check the environment and decide what URL to use based on the environment.

推荐答案

您可以在属性文件中执行此操作:

You can do this in your attributes file:

default['test_cookbook']['Development']['URL']='jdbc:mysql://exampleDB1.com'
default['test_cookbook']['Production']['URL']='jdbc:mysql://exampleDB2.com'

然后在食谱顶部，将食谱的节点属性放入ruby变量中，并使用该变量:

Then at the top of your recipe pull the node attributes for the cookbook into a ruby variable and use that:

attributes = node['test_cookbook'][node.chef_environment]

remote_file attributes['download_location'] do
  source attributes['URL']
end

template attributes['config_file'] do
  source "myapp.conf.erb"
  variables({ attributes: attributes })
end

还有一种通过提升"通过PolicyFiles执行此操作的优雅方法，其中 policy_group 替换 chef_environment ，这是今后的推荐方法:

There's also an elegant way to do this via PolicyFiles using 'hoisting' where policy_group replaces chef_environment and is the recommended way going forwards:

https://docs.chef.io/release_notes_client/#policyfile-hoisting

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