Ansible 将变量传递给角色 [英] Ansible passing variables to roles
问题描述
我想根据环境和主机名创建文件夹、用户和组.
I would like to create folders, users and groups depending on the environment and hostname.
我的剧本将环境和主机名传递给角色，该角色应该从 defaults/main.yml 文件中选择正确的数据.
My playbook passes the environment and hostname to the role, which is supposed to pick the correct data from the defaults/main.yml file.
剧本:
roles:
- { role: myrole, environment: 'xxx', hostname: 'yyy' }
myrole/tasks/main.yml
myrole/tasks/main.yml
- name: add the group
group: name={{ item }} state=present
with_items: "{{ environment }}_{{ hostname }}_groups"
myrole/defaults/main.yml
myrole/defaults/main.yml
xxx_yyy_groups: [ '1', '2', '3', ]
但是，当我将变量传递给我的角色时，它无法使用 defaults/main.yml 文件，并且出现以下错误:
However when I pass variables to my role it fails to use the defaults/main.yml file and I get the following error:
TASK [internal/groups_users_folders : 添加组] ********************************
TASK [internal/groups_users_folders : add the group] ******************************
失败！=> {"failed": true, "msg": "环境必须是字典，收到xxx()"}
FAILED! => {"failed": true, "msg": "environment must be a dictionary, received xxx ()"}
为什么 Ansible 不能再访问 defaults 文件夹中的变量了?或者有更优雅的方式吗?
Why can't Ansible access the variables in the defaults folder anymore? Or is there a more elegant way?
显然 Ansible 不喜欢将变量称为环境"，我无法像这样将 with_items 变量粘合在一起.
Apparently Ansible doesn't like the variable to be called "environment" and I can't glue together the with_items variable like this.
- name: set groups variable
set_fact:
groups: "{{ env }}_{{ hostname }}_groups"
- name: add groups
group: name={{ item }} state=present
with_items: "{{ groups }}"
似乎适用于数组，如果我使用散列并想使用 item.xxx 访问变量，则会返回此错误:
Seems to work with arrays, if I use a hash and want to access the variables with item.xxx this error returns:
失败！=> {"failed": true, "msg": "字段 'args' 有一个无效的值，它似乎包含一个未定义的变量.这错误是:'unicode object' 没有属性 'name'\n\n错误似乎已经在'.../tasks/main.yml':第 25 行，第 3 列，但可能\n位于文件中的其他位置，具体取决于确切的语法问题.\n\n违规行似乎是:\n\n\n-名称:添加用户\n ^ 这里\n"}
FAILED! => {"failed": true, "msg": "the field 'args' has an invalid value, which appears to include a variable that is undefined. The error was: 'unicode object' has no attribute 'name'\n\nThe error appears to have been in '.../tasks/main.yml': line 25, 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: add users\n ^ here\n"}
推荐答案
您在 with_items: "{{ env }}_{{ hostname }}_groups" 中使用 with_items 的方式有点错误.实际上你传递的是字符串xxx_yyy_groups"，但是你需要将它作为一个变量名传递.
You use with_items in a bit wrong way with with_items: "{{ env }}_{{ hostname }}_groups".
In fact you pass string "xxx_yyy_groups", but you need to pass it as a variable name.
我做了一些研究，但似乎不可能这样做.您要么需要使用事实，要么使用变量加载文件(例如{{ env }}_{{ 主机名 }}.yml).实际上，人们通常如何处理环境和默认操作系统系列的不同任务和变量.
I did some research and it looks like it isn't possible to do it this way. You either need to use fact as you do or load file with variables(e.g.
{{ env }}_{{ hostname }}.yml).
Actually it how normally people handle different tasks and variables for environments and for default OS families.
我希望这会有所帮助！
UPD 你也可以看看这个答案:Ansible:如何从另一个变量构造一个变量，然后获取它的值获取一些细节/想法
UPD you can also take a look on this answer:Ansible: how to construct a variable from another variable and then fetch it's value to get some details/thoughts
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