Ansible 访问分子测试中的可解释变量

我在研究inspec以及如何在ansible中使用它时，拿起了这个分子。我觉得这个分子很酷，于是就采用了它。我想用两种方式使用它

1- When developing a role or playbook
2- After a particular playbook have been run on production.

关于第1点：我发现这非常有用，这有助于我形成我的思维。我将角色卡夫卡的变量文件放在小组变量/all下，正如stackoverflow帖子中建议的那样

- kafka
- - molecule
- - - default
- - - - molecule.yml
- - - - playbook.yml
- - - - ...
- - - - group_vars
- - - - - all.yml
- - - - tests
- - - - - test_default.py
- - tasks
- - - main.yml
- - ....

测试默认值.py

import os

import testinfra.utils.ansible_runner
import pytest


testinfra_hosts = testinfra.utils.ansible_runner.AnsibleRunner(
    os.environ['MOLECULE_INVENTORY_FILE']).get_hosts('all')


@pytest.fixture()
def AnsibleVars(host):
    all_vars = host.ansible.get_variables()
    return all_vars


def test_hosts_file(host):
    f = host.file('/etc/hosts')

    assert f.exists
    assert f.user == 'root'
    assert f.group == 'root'


def test_downloaded_binary(host, AnsibleVars):
    # arch = host.file(AnsibleVars['kafka_archive_temp'])
    result = host.ansible('debug','var=kafka_archive_temp')
    arch = host.file(result['kafka_archive_temp'])
    assert arch.exists
    assert arch.is_file

def test_installation_directory(host,AnsibleVars):
    # dir = host.file(AnsibleVars['kafka_final_path'])
    result = host.ansible('debug','var=kafka_final_path')
    dir = host.file(result['kafka_final_path'])
    assert dir.exists
    assert dir.is_directory
    assert dir.user == AnsibleVars['kafka_user_on_os']
    assert dir.group == AnsibleVars['kafka_group_on_os']


def test_user_created(host,AnsibleVars):
    user = host.user(AnsibleVars['kafka_user_on_os'])

    assert user.name == AnsibleVars['kafka_user_on_os']
    assert user.group == AnsibleVars['kafka_group_on_os']

molecule verify
--> Validating schema /Users/joseph/Engineering/configuration-management-ansible/roles/kafka/molecule/default/molecule.yml.
Validation completed successfully.
--> Test matrix

└── default
    └── verify

--> Scenario: 'default'
--> Action: 'verify'
--> Executing Testinfra tests found in /Users/joseph/Engineering/configuration-management-ansible/roles/kafka/molecule/default/tests/...
============================= test session starts ==============================
platform darwin -- Python 3.7.4, pytest-5.1.2, py-1.8.0, pluggy-0.12.0
rootdir: /Users/joseph/Engineering/configuration-management-ansible/roles/kafka/molecule/default
plugins: testinfra-3.1.0
collected 8 items

tests/test_default.py ........                                             [100%]

============================== 8 passed in 18.34s  ==============================

组变量/all.yml

kafka_version: "2.2.1"
kafka_file_name: "kafka_2.12-{{ kafka_version }}.tgz"
kafka_user_on_os: kafka
kafka_group_on_os: kafka
kafka_zookeeper_service: zookeeper
kafka_service: kafka
kafka_log_folder: /var/log/kafka
kafka_zookeeper_port: 2181
kafka_archive_temp: "/tmp/{{ kafka_file_name }}"
kafka_final_path: "/usr/local/kafka/{{ kafka_version }}"
kafka_get_binaries_details:
  - {
    dest: "{{ kafka_archive_temp }}",
    url: "http://www-us.apache.org/dist/kafka/2.2.1/kafka_2.12-2.2.1.tgz"
  }
  ....

分子验证

import os

import testinfra.utils.ansible_runner
import pytest


testinfra_hosts = testinfra.utils.ansible_runner.AnsibleRunner(
    os.environ['MOLECULE_INVENTORY_FILE']).get_hosts('all')


@pytest.fixture()
def AnsibleVars(host):
    all_vars = host.ansible.get_variables()
    return all_vars


def test_hosts_file(host):
    f = host.file('/etc/hosts')

    assert f.exists
    assert f.user == 'root'
    assert f.group == 'root'


def test_downloaded_binary(host, AnsibleVars):
    # arch = host.file(AnsibleVars['kafka_archive_temp'])
    result = host.ansible('debug','var=kafka_archive_temp')
    arch = host.file(result['kafka_archive_temp'])
    assert arch.exists
    assert arch.is_file

def test_installation_directory(host,AnsibleVars):
    # dir = host.file(AnsibleVars['kafka_final_path'])
    result = host.ansible('debug','var=kafka_final_path')
    dir = host.file(result['kafka_final_path'])
    assert dir.exists
    assert dir.is_directory
    assert dir.user == AnsibleVars['kafka_user_on_os']
    assert dir.group == AnsibleVars['kafka_group_on_os']


def test_user_created(host,AnsibleVars):
    user = host.user(AnsibleVars['kafka_user_on_os'])

    assert user.name == AnsibleVars['kafka_user_on_os']
    assert user.group == AnsibleVars['kafka_group_on_os']

molecule verify
--> Validating schema /Users/joseph/Engineering/configuration-management-ansible/roles/kafka/molecule/default/molecule.yml.
Validation completed successfully.
--> Test matrix

└── default
    └── verify

--> Scenario: 'default'
--> Action: 'verify'
--> Executing Testinfra tests found in /Users/joseph/Engineering/configuration-management-ansible/roles/kafka/molecule/default/tests/...
============================= test session starts ==============================
platform darwin -- Python 3.7.4, pytest-5.1.2, py-1.8.0, pluggy-0.12.0
rootdir: /Users/joseph/Engineering/configuration-management-ansible/roles/kafka/molecule/default
plugins: testinfra-3.1.0
collected 8 items

tests/test_default.py ........                                             [100%]

============================== 8 passed in 18.34s  ==============================

验证程序已成功完成。 但是，方法

host.ansible.get_variables（）

无法解析另一个变量中的变量，如：

kafka_final_path:“/usr/local/kafka/{{kafka_version}}”

我最终使用了以下方法：

 result = host.ansible('debug','var=kafka_final_path')
 dir = host.file(result['kafka_final_path'])

获取卡夫卡最终路径的值

问题1.1：看看在使用所有需要的插值检索变量之前，如何需要进行一些操作，我想知道有没有更好的方法来编写这些测试

问题2.1：在第2个问题上，我想为测试创建一个不同的场景，比如AWS上的EC2。在这些剧本上，我使用传递给ansible剧本的外部变量文件，因为它们具有更高的优先级。在这种情况下，我想知道如何从testinfra中的外部vars_文件访问这些变量