vagrant - 无法将嵌套的哈希数组传递给 Vagrant 的 ansible_local 配置程序中的 ansible.host_vars

Question

我正在尝试添加自定义 HBA 条目，以允许主机连接到 Vagrant 盒子上运行的 PostgreSQL 实例:

config.vm.provision "ansible_local" do |ansible|
  ansible.playbook = "provisioning/playbook.yml"
  ansible.galaxy_role_file = "provisioning/requirements.yml"
  ansible.host_vars = {
    "default" => {
      "postgresql_listen_addresses" => "*",
      "postgresql_pg_hba_custom" => [{
        "type" => "host",
        "database" => "vagrant",
        "user" => "vagrant",
        "address" => "samenet",
        "method" => "password"
      }],
      "database_name" => "vagrant",
      "database_username" => "vagrant",
      "database_password" => "password",
      "node_environment" => "development"
    }
  }
end

我收到错误:

AnsibleUndefinedVariable: 'unicode object' has no attribute 'type'

如何在我的 Vagrantfile 内部传递主机变量的嵌套(复杂)配置值？

Answer 1

检查自动生成的 list 文件/tmp/vagrant-ansible/inventory/vagrant_ansible_local_inventory 中的主机条目的主机变量如何在单行中编码:

# Generated by Vagrantdefault ... postgresql_pg_hba_custom=[{"type"=>"host", "database"=>"vagrant", "user"=>"vagrant", "address"=>"samenet", "method"=>"password"}] database_name=vagrant database_username=vagrant database_password=password node_environment=development

The value passed to postgresql_pg_hba_custom is not in a valid format.

The Ansible documentation on variables states:

As of Ansible 1.2, you can also pass in extra vars as quoted JSON, like so:

--extra-vars '{"pacman":"mrs","ghosts":["inky","pinky","clyde","sue"]}'

So, you should pass complex values as JSON wrapped inside single-quotes. Instead of manually crafting the value, you can make use of Ruby's JSON module and string interpolation:

config.vm.provision "ansible_local" do |ansible|
  require 'json'

  postgresql_pg_hba_custom = [{
    "type" => "host",
    "database" => "vagrant",
    "user" => "vagrant",
    "address" => "samenet",
    "method" => "password"
  }]

  ansible.playbook = "provisioning/playbook.yml"
  ansible.galaxy_role_file = "provisioning/requirements.yml"
  ansible.host_vars = {
    "default" => {
      "postgresql_listen_addresses" => "*",
      "postgresql_pg_hba_custom" => "'#{postgresql_pg_hba_custom.to_json}'",
      "database_name" => "vagrant",
      "database_username" => "vagrant",
      "database_password" => "password",
      "node_environment" => "development"
    }
  }
end

生成的 list 文件现在将是:

# Generated by Vagrantdefault ... postgresql_pg_hba_custom='[{"type":"host","database":"vagrant","user":"vagrant","address":"samenet","method":"password"}]' database_name=vagrant database_username=vagrant database_password=password node_environment=development