ansible 模板将值添加到列表 - [英] ansible template add value to list -

问题描述

基于以下 ansible playbook 值..

based on the following ansible playbook values ..

target:  "actual.domain.com"
aliases:
  - "alias1.domain.com"
  - "alias2.domain.com"

我正在尝试设置一个 ansible 模板来生成 nginx server_name在这种情况下应该是:

I am trying to setup an ansible template to produce the nginx server_name which in this case should be:

server_name: "actual.domain.com alias1.domain.com alias2.domain.com"

所以，我尝试了以下 jinja2 脚本...

so , I tried the following jinja2 script ...

{% if item.aliases is defined %}
    {% set servername = [ item.target ] %}
    {% for alias in item.aliases.iteritems() %}
       {% if alias|length > 0 %}
           {% servername|join(' '), alias %}  # <= line 30
       {% endif %}
    {% endfor %}
    server_name {{ servername }};
 {% else %}
     server_name {{ item.target }};
 {% endif %}
  ....

但它失败了，行号:30，错误:遇到未知标签服务器名"

but it's failing , line number: 30, error: Encountered unknown tag 'servername'

我哪里错了?

感谢您的帮助和 HNY！

thanks for help and HNY !

推荐答案

您似乎使这件事变得过于复杂.为什么不是这样的?

It seems you've made this substantially more complicated than necessary. Why not something like this?

$ ansible-playbook -i hosts play.yml

PLAY [localhost] **************************************************************

TASK: [template src='servername.j2' dest=tmp/servername-{{item.target}}] ******
changed: [localhost] => (item={'target': 'actual.domain.com', 'aliases': ['alias1.domain.com', 'alias2.domain.com']})

PLAY RECAP ********************************************************************
localhost                  : ok=1    changed=1    unreachable=0    failed=0

文件内容

$ tail -n 1000 `find ./ -type f`

==> .//hosts <==
[localhost]
localhost ansible_connection=local


==> .//play.yml <==
- hosts: localhost
  gather_facts: false
  vars:
    servers:
      - target: "actual.domain.com"
        aliases:
          - "alias1.domain.com"
          - "alias2.domain.com"
  tasks:
    - template: src='servername.j2' dest=tmp/servername-{{item.target}}
      with_items: servers


==> .//servername.j2 <==
server_name {{ item.target }} {{ item.aliases|join(" ") }}


==> .//tmp/servername-actual.domain.com <==
server_name actual.domain.com alias1.domain.com alias2.domain.com

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