问题描述
如果我在 Ansible 中有一个 ip 地址列表,我可以对它使用 ipaddr
过滤器并且只取回传递的值:
If I had a list of ip addresses in Ansible, I could use the ipaddr
filter to it and only get the passing values back:
- debug:
msg: "{{ ['127.0.0.1', 'foo', '2001:db8:32c:faad::'] | ipaddr('address') }}"
不幸的是,我正在处理一个对象列表(准确地说是组成员的hostvars).我想对列表进行一些测试,只保留条目通过 - 但作为对象.
Unfortunately I am working with a list of objects (hostvars of group members to be precise). I want to do some tests on the list and only keeping the entries passing - but as objects.
在阅读 Jinja 文档时,我偶然发现了 selectattr
.不幸的是,ipaddr
似乎不是测试,所以它不起作用:
When reading the Jinja docs I stumbled across selectattr
. Unfortunately it seems that ipaddr
isn't a test, so it doesn't work:
- debug:
msg: "{{ [{'ip':'127.0.0.1'}, {'ip':'foo'}, {'ip':'2001:db8:32c:faad::'}] | selectattr('ip', 'ipaddr', 'address') | list}} "
结果
jinja2.exceptions.TemplateRuntimeError: 没有名为 'ipaddr' 的测试
有没有什么办法可以使用ipaddr
来过滤对象列表?
Is there any way to use ipaddr
to filter a list of objects?
推荐答案
当然!您可以使用 map
函数将过滤器应用于您的列表以获取(有效)true
/false
值的列表,然后使用结合您的原始列表以仅选择具有有效地址的条目.例如:
Sure! You can use the map
function to apply the filter to your list to get a list of (effectively) true
/false
values, and then use that in combination with your original list to select only entries with a valid address. For example:
---
- hosts: localhost
gather_facts: false
vars:
addresses:
- name: host0
ip: 127.0.0.1
- name: host1
ip: foo
- name: host2
ip: '2001:db8:32c:faad::'
tasks:
- set_fact:
valid_addresses: "{{ addresses|json_query('[*].ip')|map('ipaddr')|list }}"
- debug:
msg: "host {{ item.0.name }} has valid address {{ item.0.ip }}"
when: item.1
loop: "{{ addresses|zip(valid_addresses)|list }}"
这篇关于在 Ansible 中使用 ipaddr 过滤对象列表的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!