Ansible 變數範本問題

Question

我在 Ansible 中有一個模板可以為 Prometheus 製作設定檔。我想使用變數動態新增主機prometheus_hosts。該變數在每個主機的 host_vars 中定義，但 Ansible 的模板可能存在一些問題。

變數設定如下：prometheus_hosts: [ host1, host2, host3 ]

範本

global:
    scrape_interval: 15s

global:
    scrape_interval: 15s

scrape_configs:
- job_name: 'prometheus'
    scrape_interval: 5s
    static_configs:
       - targets: ['localhost:9090']

{% if prometheus_hosts is defined %}
{% for host in prometheus_hosts %}
- job_name: '{{ host }}'
    scrape_interval: 5s
    static_configs:
       - targets: ['{{ host }}:9100']
{% endfor %}
- job_name: 'mysql'
    scrape_interval: 5s
    static_configs:
       - targets: ['localhost:9104']
- job_name: 'redis'
    scrape_interval: 5s
    static_configs:
       - targets: ['localhost:9121']

{% for host in prometheus_hosts if host.name.startswith('edge') %}
- job_name: '{{ host }}_varnish'
   scrape_interval: 5s
   static_configs:
       - targets: ['{{ host }}:9131']
{% endfor %}
{% endif %}

錯誤

致命：[test-mw]：失敗！ => {"changed": false, "msg": "AnsibleUndefinedVariable: 'ansible.parsing.yaml.objects.AnsibleUnicode object' has no attribute 'name'"} 若要重試，請使用： --limit @/home/ gitlab-跑者/builds/xw_vGpUQ/0/ansible/middleware/middleware.retry

您知道如何修復它嗎？謝謝你！

Answer 1

在表達式中

 {% for host in prometheus_hosts if host.name.startswith('edge') %}

「host」是清單「prometheus_hosts」中的一項。此清單中的項目沒有屬性「名稱」。這就是錯誤的原因

"msg": "AnsibleUndefinedVariable: 'ansible.parsing.yaml.objects.AnsibleUnicode 物件'沒有屬性'名稱'

---

可以使用測試字串。例如

{% for host in my_hosts %}
{% if host is regex('^edge(.*)$') %}