使用 chef Python cookbook 为我的 virtualenv 指定不同的 Python 版本答案

【问题标题】：Specify a different Python version for my virtualenv using chef Python cookbook使用 chef Python cookbook 为我的 virtualenv 指定不同的 Python 版本
【发布时间】：2013-03-26 03:37:15
【问题描述】：

我正在尝试使用 Chef 在 ubuntu 11.10 VM 内使用 opscode Python cookbook 的节点上安装 virtualenv。特别是，我正在使用 application 食谱为 Django 和 Gunicorn 执行此操作。

python_virtual 资源的default setting 是python2.6。我试图通过覆盖我的角色文件中的默认属性来指定 python2.7，如下所示：

override_attributes(
  :authorization => {
    :sudo => {
      :users => ["vagrant"],
      :passwordless => true
    }
  },
  :python_virtualenv => {
    :interpreter => "python2.7"
  }
)

但是，这不起作用：

[Thu, 26 Jan 2012 17:34:31 -0500] FATAL: Chef::Exceptions::ShellCommandFailed: execute[virtualenv --python=python2.6 /home/deploy/shared/env] (/srv/chef/file_store/cookbooks/python/providers/virtualenv.rb line 28) had an error: Chef::Exceptions::ShellCommandFailed: Expected process to exit with [0], but received '3'
---- Begin output of virtualenv --python=python2.6 /home/deploy/shared/env ----
STDOUT: The executable python2.6 (from --python=python2.6) does not exist

在这里覆盖默认值的正确语法是什么？

【问题讨论】：

标签： python virtualenv chef-infra

【解决方案1】：

这是我为使解释器成为 application::django 提供程序的参数所做的工作

diff --git a/cookbooks/application_python/providers/gunicorn.rb b/cookbooks/application_python/providers/gunicorn.rb
index 08c5925..210e508 100644
--- a/cookbooks/application_python/providers/gunicorn.rb
+++ b/cookbooks/application_python/providers/gunicorn.rb
@@ -27,6 +27,7 @@ action :before_compile do
   django_resource = new_resource.application.sub_resources.select{|res| res.type == :django}.first
   gunicorn_install "gunicorn-#{new_resource.application.name}" do
     virtualenv django_resource ? django_resource.virtualenv : nil
+    interpreter django_resource.interpreter
   end

   if !new_resource.restart_command
diff --git a/cookbooks/application_python/resources/django.rb b/cookbooks/application_python/resources/django.rb
index 6429cee..b4d4b38 100644
--- a/cookbooks/application_python/resources/django.rb
+++ b/cookbooks/application_python/resources/django.rb
@@ -30,7 +30,7 @@ attribute :settings_template, :kind_of => [String, NilClass], :default => nil
 attribute :local_settings_file, :kind_of => String, :default => 'local_settings.py'
 attribute :debug, :kind_of => [TrueClass, FalseClass], :default => false
 attribute :collectstatic, :kind_of => [TrueClass, FalseClass, String], :default => false

 def local_settings_base
   local_settings_file.split(/[\\\/]/).last
diff --git a/cookbooks/application_python/resources/gunicorn.rb b/cookbooks/application_python/resources/gunicorn.rb
index 50d3c2b..f68c868 100644
--- a/cookbooks/application_python/resources/gunicorn.rb
+++ b/cookbooks/application_python/resources/gunicorn.rb
@@ -42,3 +42,4 @@ attribute :logfile, :kind_of => String, :default => '-'
 attribute :loglevel, :kind_of => [String, Symbol], :default => :info
 attribute :proc_name, :kind_of => [String, NilClass], :default => nil
 attribute :command, :kind_of => [String, NilClass], :default => ""
+attribute :interpreter, :kind_of => String, :default => nil
diff --git a/cookbooks/gunicorn/providers/install.rb b/cookbooks/gunicorn/providers/install.rb
index 19266ad..67f526c 100644
--- a/cookbooks/gunicorn/providers/install.rb
+++ b/cookbooks/gunicorn/providers/install.rb
@@ -20,6 +20,7 @@

 action :install do
   python_virtualenv new_resource.virtualenv do
+    interpreter new_resource.interpreter
     action :create
   end if new_resource.virtualenv

diff --git a/cookbooks/gunicorn/resources/install.rb b/cookbooks/gunicorn/resources/install.rb
index 6c7f8b6..f52fe09 100644
--- a/cookbooks/gunicorn/resources/install.rb
+++ b/cookbooks/gunicorn/resources/install.rb
@@ -21,6 +21,7 @@
 actions :install

 attribute :virtualenv, :kind_of => String, :default => nil
+attribute :interpreter, :kind_of => String, :default => nil

 def initialize(*args)
   super
diff --git a/cookbooks/webplayer/recipes/default.rb b/cookbooks/webplayer/recipes/default.rb
index 8c812ce..1981c09 100644
--- a/cookbooks/webplayer/recipes/default.rb
+++ b/cookbooks/webplayer/recipes/default.rb
@@ -22,6 +22,11 @@ file "/etc/chef/deploy" do
   :create_if_missing
 end

+directory "/root/.ssh" do
+  owner "root"
+  group "root"
+end
+
 file "/root/.ssh/config" do
   owner "root"
   group "root"

【讨论】：

【解决方案2】：

我很确定您不能在不实际更改资源的情况下更改资源的默认值。可能不是你想要的答案。您可能需要在使用资源的任何位置指定覆盖值。

【讨论】：

【解决方案3】：

您可能需要将完整路径传递给 python 解释器：

:interpreter => "/usr/bin/python2.7"

【讨论】：