Ansible 角色内环境变量的可用资源清册

我得到了一个我想要执行psql脚本的Ansible角色。该角色的名称为“db_scripts”，我将在下面列出各个目录/文件的内容

db_脚本/任务/mail.yml

-
  name: "Run the SQLS"
  command: "psql -f \"{{ script }}\"/files/my_sql_script.sql"
  environment:
    PGDATABASE: "{{ db_name }}"
    PGUSER: "{{ db_user }}"
    PGHOST: "{{ db_host }}"
    PGPORT: "{{ db_port }}"
  delegate_to: localhost

insert into employees(name, contact) values (Jack, 5555555);

script: "{{ role_path }}"

- name: Run sql
  hosts: dbservers
  roles:
    - db_scripts

db\u scripts/files/my\u sql\u script.yml

-
  name: "Run the SQLS"
  command: "psql -f \"{{ script }}\"/files/my_sql_script.sql"
  environment:
    PGDATABASE: "{{ db_name }}"
    PGUSER: "{{ db_user }}"
    PGHOST: "{{ db_host }}"
    PGPORT: "{{ db_port }}"
  delegate_to: localhost

insert into employees(name, contact) values (Jack, 5555555);

script: "{{ role_path }}"

- name: Run sql
  hosts: dbservers
  roles:
    - db_scripts

db\u脚本/default/main.yml

-
  name: "Run the SQLS"
  command: "psql -f \"{{ script }}\"/files/my_sql_script.sql"
  environment:
    PGDATABASE: "{{ db_name }}"
    PGUSER: "{{ db_user }}"
    PGHOST: "{{ db_host }}"
    PGPORT: "{{ db_port }}"
  delegate_to: localhost

insert into employees(name, contact) values (Jack, 5555555);

script: "{{ role_path }}"

- name: Run sql
  hosts: dbservers
  roles:
    - db_scripts

/app/production/inventory

[dbservers]
db_host=192.168.1.100 db_name=mycompany db_user=abc db_port=3308

[dbservers]
192.168.1.100 db_name=mycompany db_user=abc db_port=3308

/app/playbooks/run_-sqls.yml

-
  name: "Run the SQLS"
  command: "psql -f \"{{ script }}\"/files/my_sql_script.sql"
  environment:
    PGDATABASE: "{{ db_name }}"
    PGUSER: "{{ db_user }}"
    PGHOST: "{{ db_host }}"
    PGPORT: "{{ db_port }}"
  delegate_to: localhost

insert into employees(name, contact) values (Jack, 5555555);

script: "{{ role_path }}"

- name: Run sql
  hosts: dbservers
  roles:
    - db_scripts

我运行剧本“run_sqls”，如下所示

ansible-playbook run_sqls.yml -i inventories/app/production/inventory

我想了解的是，我应该如何为以下环境变量指定值，以便它们可以是动态的，并且可以被其他环境（例如：开发等）的主机使用

PGDATABASE: "{{ db_name }}"
PGUSER: "{{ db_user }}"
PGHOST: "{{ db_host }}"
PGPORT: "{{ db_port }}"

在各自的清单文件中指定它们似乎不起作用，对于“未定义的变量”，playbook错误是有意义的。以下是我的尝试。 /app/production/inventory

[dbservers]
db_host=192.168.1.100 db_name=mycompany db_user=abc db_port=3308

[dbservers]
192.168.1.100 db_name=mycompany db_user=abc db_port=3308

运行剧本时的错误

TASK [db_scripts : Run the SQLS] ******************************************************************************************************************************************************************
fatal: [localhost]: FAILED! => {"msg": "The field 'environment' has an invalid value, which includes an undefined variable. The error was: 'db_host' is undefined\n\nThe error appears to be in '/home/db_scripts/tasks/mail.yml': line 37, column 3, but may\nbe elsewhere in the file depending on the exact syntax problem.\n\nThe offending line appears to be:\n\n-\n  name: \"Run the SQLS\"\n  ^ here\n"}

请注意，当在“db_scripts/default/main.yml”下指定上述环境变量的值时 ，playbook运行良好。非常感谢你的一些意见。我刚开始学习ansible，所以请尽可能简单地使用示例。提前感谢：）

问：“在各自的清单文件中指定它们（变量）似乎不起作用，因为“未定义变量”的剧本错误是有意义的。”

答：该清单中的变量应按预期工作。简单地测试一下

- hosts: dbservers
  tasks:
    - debug:
        msg:
          - '{{ db_name }}'
          - '{{ db_user }}'
          - '{{ db_host }}'
          - '{{ db_port }}'

有两个问题

1）

db\u主机

在资源清册中缺失

2） 命令

inventory/app/production/inventory

中的路径与描述的路径不同

/app/production/inventory

ansible-playbook run_sqls.yml -i inventories/app/production/inventory

---

你说：

“…剧本中的“未定义变量”错误是有道理的。”

有没有可能解释一下到底什么是有道理的？谢谢@Vladimir Yeah db_在发布问题时错误地遗漏了库存中的主机。然而，仍然没有运气。我已经用剧本错误更新了我的原始问题。