当 docker 容器 pod 处于错误或 CarshLoopBackOff kubernetes 状态时发出警报

Question

我在 AWS 上设置了我的 kubernetes 集群，我正在尝试使用 cAdvisor + Prometheus + Alert Manager 监控多个 Pod。我想做的是，如果容器/pod 出现故障或卡在错误或 CarshLoopBackOff 状态或 stcuk 处于除运行之外的任何其他状态，它会启动电子邮件警报(带有服务/容器名称(。

Answer 1

Prometheus 收集了广泛的指标。例如，您可以使用指标kube_pod_container_status_restarts_total来监视重启，这将反映你的问题。

它包含可在警报中使用的标记：

• 容器= container-name
• 命名空间 = pod-namespace
• 豆荚= pod-name

因此，您所需要的只是通过添加正确的SMTP设置，接收器和规则来配置alertmanager.yaml配置：

global:
  # The smarthost and SMTP sender used for mail notifications.
  smtp_smarthost: 'localhost:25'
  smtp_from: '[e-mail]'
  smtp_auth_username: 'alertmanager'
  smtp_auth_password: 'password'
receivers:
- name: 'team-X-mails'
  email_configs:
  - to: '[e-mail]'
# Only one default receiver
route:
  receiver: team-X-mails
# Example group with one alert
groups:
- name: example-alert
  rules:
    # Alert about restarts
  - alert: RestartAlerts
    expr: count(kube_pod_container_status_restarts_total) by (pod-name) > 5
    for: 10m
    annotations:
      summary: "More than 5 restarts in pod {{ $labels.pod-name }}"
      description: "{{ $labels.container-name }} restarted (current value: {{ $value }}s) times in pod {{ $labels.pod-namespace }}/{{ $labels.pod-name }}"

Answer 2

我正在使用这个：

    - alert: PodCrashLooping
  annotations:
    description: Pod {{ $labels.namespace }}/{{ $labels.pod }} ({{ $labels.container }}) is restarting {{ printf "%.2f" $value }} times / 5 minutes.
    summary: Pod is crash looping.
  expr: rate(kube_pod_container_status_restarts_total{job="kube-state-metrics",namespace=~".*"}[5m]) * 60 * 5 > 0
  for: 5m
  labels:
    severity: critical