Ansible Jinja2从字典中的列表中获取元素

Question

我无法从Jinja 2的字典中的列表中获取第n个元素（IP地址）。

我的剧本

---
- name: Test dictionaries playbook
  hosts: test
  remote_user: user

  vars:
    list_dict:
      - {"hostname": "server01", "ip": [ '10.10.10.161', '10.10.10.250', '10.228.115.120', '10.10.10.224' ] }
      - {"hostname": "server02", "ip": [ '10.10.10.162', '10.10.10.253', '10.228.115.121', '10.10.10.225' ] }

  tasks:
    - name: Get Facts
      template:
       src: ../template.j2
       dest: /tmp/template-out
      delegate_to: localhost
      with_items: list_dict

模板使用的是“ template.j2”

{% for host in list_dict %}
   Current host is {{host.hostname}}
   The ips for this host are:
   {% for ip in host.ip %}
     {{ ip[0] }}
   {% endfor %}
{% endfor %}

当前输出（我想它是每个IP的第一个元素为“ 1”

Current host is server01
The ips for this host are:
     1
     1
     1
     1

Current host is server02
The ips for this host are:
     1
     1
     1
     1

所需的输出（我想为每个主机获取整个第一个IP）

知道我该如何完成吗？

The ips for this host are:
     10.10.10.161


Current host is server02
The ips for this host are:
    10.10.10.162

在Python中，应该是这样的：

hostname = { "name" : "server02", "ip": [ '10.10.10.162', '10.228.115.121', '10.10.10.225', '10.10.10.251' ]  }

print hostname["ip"][0]
10.10.10.162

Answer 1

与您已经提到的完全相同。不需要内部循环。

{% for host in list_dict %}
   Current host is {{host.hostname}}
   The ips for this host are:
   {{ host.ip[0] }}
{% endfor %}