Forward alerts to different Slack channels

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1

AlertManager ver. 0.26.0

I’ve been trying to forward alerts to 2 Slack channels, but without success…

Here’s my Prometheus config file:

  - job_name: 'node_exporter_metrics_staging'
    scrape_interval: 5s
    static_configs:
      - targets:
          [
            'staging.domain.tld:9100',
          ]

  - job_name: 'node_exporter_metrics_test'
    scrape_interval: 5s
    static_configs:
      - targets:
          [
            'test.cli:9100',
          ]

This is the Alert Manager config file:

route:
  group_by: ['alertname', 'group', 'instance']
  group_wait: 30s
  group_interval: 5m
  repeat_interval: 1h
  # default receiver
  receiver: 'test-receiver'
  routes:
    - match:
        group: 'node_exporter_metrics_staging'
      continue: true
      receiver: 'staging-receiver'
    - match:
        group: 'node_exporter_metrics_test'
      continue: true
      receiver: 'test-receiver'

And this is the alerts file

groups:
- name: alert.rules
  rules:
  # INSTANCE DOWN
  - alert: Instance_Down
    expr: up == 0
    for: 1m
    labels:
      severity: "critical"
    annotations:
      summary: "Instance {{ $labels.instance }} is down"
      description: "{{ $labels.instance }} has been down for more than 1 minutes."

With this config, alerts are being forwarded only to default receiver (test-receiver).

Am I missing something?