Prometheus Docker 无法以 `Template: (dynamic): parse: template: :10: undefined variable "$labels"` 开头

Question

我正在尝试运行 Nomad 上的普罗米修斯。一切看起来都很好，但是当我在 annotations 中添加带有模板的警报规则时，它失败了。

这是一个简单的警报规则：

groups:
- name: alertmanager.rules
  rules:
  - alert: AlertmanagerDown
    expr: up{job="alertmanager"} == 0
    for: 1s
    labels:
      severity: critical
    annotations:
      description: 'Alertmanager on {{ $labels.role }} instance {{ $labels.node }} has not produced any metrics for 5 minutes'
      summary: 'Alertmanager is down on {{ $labels.role }} instance {{ $labels.node }}'

容器失败 Template: (dynamic): parse: template: :10: undefined variable "$labels"

如果我删除 annotations 部分，它可以正常启动。

Answer 1

必须将 left_delimiter 和 right_delimiter 设置为 {{ 和 }} 以外的值 https://www.nomadproject.io/docs/job-specification/template.html#left_delimiter

Prometheus Docker 无法以 `Template: (dynamic): parse: template: :10: undefined variable "$labels"` 开头

Prometheus Docker fails to start with `Template: (dynamic): parse: template: :10: undefined variable "$labels"`

prometheus

prometheus-alertmanager