厨师：如何在ruby_block中要求ruby/mysqlAPI？

Question

我是 ruby 的新人，也是厨师。我成功地建立了一个厨师服务器和 bootstrap 个节点。我想通过我的食谱访问节点上的 Mysql 而没有 Mysql 和数据库食谱。我用了 ruby/mysql API。在单个 ruby 文件中编程时效果很好。代码如下

require "rubygems"
require "mysql"

begin
    con = Mysql.new("localhost", "root", "123")
    res = con.query("create database abc")
rescue Mysql::Error => e
    puts e.errno
    puts e.error
ensure
    con.close if con
end

但是当我将此代码添加到我的食谱和 chef-client 中的 ruby_block 时，我在节点上遇到了错误。

================================================================================
Error executing action `run` on resource 'ruby_block[test1]'
================================================================================

LoadError
---------
cannot load such file -- mysql

Cookbook Trace:
---------------
/var/chef/cache/cookbooks/db_test/recipes/default.rb:14:in `block (2 levels) in from_file'

Resource Declaration:
---------------------
# In /var/chef/cache/cookbooks/db_test/recipes/default.rb

 11: ruby_block "test1" do
 12:        block do
 13:                require "rubygems"
 14:                require "mysql"
 15:
 16:                begin
 17:                        con = Mysql.new("localhost", "root", "123")
 18:                        res = con.query("create database abc")
 19:                rescue Mysql::Error => e
 20:                        puts e.errno
 21:                        puts e.error
 22:                ensure
 23:                        con.close if con
 24:                end
 25:        end
 26: #      action :run

Compiled Resource:
------------------
# Declared in /var/chef/cache/cookbooks/db_test/recipes/default.rb:11:in `from_file'

ruby_block("test1") do
  action "run"
  retries 0
  retry_delay 2
  default_guard_interpreter :default
  block_name "test1"
  declared_type :ruby_block
  cookbook_name "db_test"
  recipe_name "default"
  block #<Proc:0x000000051907a8@/var/chef/cache/cookbooks/db_test/recipes/default.rb:12>
end


Running handlers:
[2015-04-07T22:14:12-04:00] ERROR: Running exception handlers
Running handlers complete
[2015-04-07T22:14:12-04:00] ERROR: Exception handlers complete
[2015-04-07T22:14:12-04:00] FATAL: Stacktrace dumped to /var/chef/cache/chef-stacktrace.out
Chef Client failed. 0 resources updated in 0.962999999 seconds
[2015-04-07T22:14:12-04:00] ERROR: ruby_block[test1] (db_test::default line 11) had an error: LoadError: cannot load such file -- mysql
[2015-04-07T22:14:12-04:00] FATAL: Chef::Exceptions::ChildConvergeError: Chef run process exited unsuccessfully (exit code 1)

我想不通问题出在什么时候。有人可以帮忙吗？

Answer 1

Chef 在其自己的 ruby 实例中运行（假设您已使用 omnibus 安装）。您需要使用 chef_gem 资源将 mysql gem 安装到 Chef ruby 中。那么你应该能够加载 mysql ruby

Answer 2

在块的顶部添加 chef_gem "mysql2" 到 require 语句之前。

厨师：如何在ruby_block中要求ruby/mysqlAPI？

Chef: How to require ruby/mysql API in ruby_block?

mysql

ruby

chef-infra

cookbook