如何解决Ansible：从playbook json输出中提取字符串并注册为变量
使用Ansible 2.9.10
运行一本手册，将vmware_guest_disk_info存储到名为disk_info的变量中。
vmware_guest_disk_info:
hostname: "{{ vcenter_hostname }}"
username: "{{ vcenter_username }}"
password: "{{ vcenter_password }}"
validate_certs: no
datacenter: "{{ dc }}"
name: "{{ vm_name }}"
register: disk_info
delegate_to: localhost
我正在尝试从密钥backing_datastore中提取值EEE-EEE-EEEE-033。我需要将值注册为变量，以便在剧本中进一步用作变量。
{
"hosts": {
"localhost": {
"_ansible_delegated_vars": {},"_ansible_no_log": false,"action": "vmware_guest_disk_info","changed": false,"guest_disk_info": {
"0": {
"backing_datastore": "EEE-EEE-EEEE-033","backing_eagerlyscrub": true,"backing_filename": "[EEE-EEE-EEEE-033]
serverhostname/serverhostname.vmdk","label": "Hard disk 1","summary": "62,914,560 KB","unit_number": 0
}
},我尝试使用循环，json_query，查找，子元素，但是我对这些还不太熟悉。
- name: get datastore
loop: "{{ hosts | json_query('localhost.guest_disk_info[*].backing_datastore') }}"
register: ds_result
delegate_to: localhost
- name: get backing_datastore value from the variable'disk_info'
debug: msg="{{ lookup('vars','disk_info')}}"
vars:
disk_info: "{{ disk_info }}"
debug: msg="{{ disk_info.json | json_query(jmesquery)}}"
vars:
jmesquery: "[*].backing_datastore"
更新的代码：
- name: extract backing_datastore value from variable "disk_info"
debug: var=disk_info.hosts.localhost.guest_disk_info.0.backing_datastore
register: ds
delegate_to: localhost
- name: show me variable ds contents
debug: var= ds
收到错误：
"disk_info.hosts.localhost.guest_disk_info.0.backing_datastore": "VARIABLE IS NOT DEFINED!: 'dict object' has no attribute 'hosts'"
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