傀儡清单脚本中的Hiera变量

Question

我让Hiera和puppet/vagrant一起运行

假设我有一个傀儡执行执行以下操作

      exec { create-project-database:
    command => 'mysql -u root -e "CREATE DATABASE project_db DEFAULT CHARACTER SET = 'utf8';"',
    unless  => 'mysql -u root information_schema -e "select * from information_schema.schemata;" | grep "project_db"',
    require => Package[mysql-server],
  }

我想将字符串"project_db"替换为我在目录

的common.yaml中的变量

---
machine_message: 'This is the dev machine!'
codes_path: '/vagrant/code/laravel/'
project_db: 'project_db'

我该怎么做呢?语法对我来说不是很清楚，像这样的东西会带来错误:

    command => 'mysql -u root -e "CREATE DATABASE 'hiera('project_db)' DEFAULT CHARACTER SET = 'utf8';"',

Answer 1

您在'hiera('project_db)'中的引号有问题(即您在括号之前没有关闭，因此hiera('project_db')应该是正确的)

通常我之前会从层次中声明变量所以像这样

$DB_NAME = hiera('project_db')
exec { create-project-database:
  command => "mysql -u root -e "CREATE DATABASE $DB_NAME DEFAULT CHARACTER SET = 'utf8';"",
  unless  => 'mysql -u root information_schema -e "select * from information_schema.schemata;" | grep "project_db"',
  require => Package[mysql-server],
}