Ansible json_query - 在语法上苦苦挣扎

Question

我已阅读 and as well as the relevant Ansible documentation。

我仍然无法弄清楚要使用的正确语法是什么。我正在尝试以下操作：

# Find all of the load-balancers reference
- name: Gather facts about all load-balancers
  elb_application_lb_facts:
  register: load_balancers

# Get the load-balancer we want
- name: Find the correct load-balancer
  set_fact:
    load_balancer_dns: "{{ load_balancer_dns }}"
    elb_zone_id: "{{ elb_zone_id }}"
  with_items: "{{ load_balancers | json_query(lb_query) }}"
  vars:
    lb_query: "load_balancers[?load_balancer_name=='{{load_balancer_name}}'].{load_balancer_dns: dns_name, elb_zone_id: canonical_hosted_zone_id}"

这总是导致错误（在第二个任务中）：The task includes an option with an undefined variable. The error was: 'load_balancer_dns' is undefined。

elb_application_lb_facts 的 JSON 输出包含 dns_name 和 canonical_hosted_zone_id 键，它们与 load_balancer_name 处于同一级别（未嵌套某处）。

有人可以帮我解决这个问题吗？

Answer 1

您需要在设置事实时包含 "item"，因为您正在循环 "with_items":

# Get the load-balancer we want
- name: Find the correct load-balancer
  set_fact:
    load_balancer_dns: "{{ item.load_balancer_dns }}"
    elb_zone_id: "{{ item.elb_zone_id }}"
  with_items: "{{ load_balancers | json_query(lb_query) }}"
  vars:
    lb_query: "load_balancers[?load_balancer_name=='simple-application-load-balancer'].{load_balancer_dns: dns_name, elb_zone_id: canonical_hosted_zone_id}"

记录在此处：https://docs.ansible.com/ansible/latest/user_guide/playbooks_loops.html#with-items

Ansible json_query - 在语法上苦苦挣扎

Ansible json_query - struggling with syntax

ansible

json-query