groups:
- name: targets
  rules:
  - alert: monitor_service_down
    expr: up == 0
    for: 30s
    labels:
      severity: critical
    annotations:
      summary: "Monitor service non-operational"
      description: "Service {{ $labels.instance }} is down."

- name: containers in example server
  rules:
  - alert: example_server_container_down
    expr: |
        (absent(container_memory_usage_bytes{name="container1"}) 
        or absent(container_memory_usage_bytes{name="container2"}) 
        or absent(container_memory_usage_bytes{name="container3"}) 
        or absent(container_memory_usage_bytes{name="nginx"}) 
        )
    for: 1m
    labels:
      severity: critical
    annotations:
      summary: "Container '{{ $labels.name }}' down"
      description:  "container with  name '{{ $labels.name }}' is down for more than one minute in main VM"

- name: containers in monitor server
  rules:
  - alert: monitoring_server_container_down
    expr: |
        (absent(container_memory_usage_bytes{name="prometheus"}) 
        or absent(container_memory_usage_bytes{name="grafana"}) 
        or absent(container_memory_usage_bytes{name="alertmanager"}) 
        )
    for: 1m
    labels:
      severity: critical
    annotations:
      summary: "Container '{{ $labels.name }}' down"
      description:  "container with  name '{{ $labels.name }}' is down for more than one minute on monitoring server"