Table of Contents

1. Challenge

   Combine the Web Server Down Alerts into a Single Group

   1. Log in to the Prometheus server.

   2. Edit the Alertmanager configuration file:

      sudo vi /etc/alertmanager/alertmanager.yml
      

   3. Add a new node to routing tree to combine the WebServer.*Down alerts:

      route:
      
        ...
      
        routes:
        - receiver: 'web.hook'
          group_by: ['service']
          match_re:
            alertname: 'WebServer.*Down'
      

   4. Load the new configuration:

      sudo killall -HUP alertmanager
      

   5. Check Alertmanager in a web browser at http://<PROMETHEUS_SERVER_PUBLIC_IP>:9093. You should see the Web Server alerts grouped together under the group service="webserver".

2. Challenge

   Create an Inhibition to Stop the `WebBadGateway` Alert When a `WebServerDown` Alert Is Already Firing

   1. Edit the Alertmanager configuration file:

      sudo vi /etc/alertmanager/alertmanager.yml
      

   2. Add a new inhibit rule:

      inhibit_rules:
      
        ...
      
        - source_match_re:
            alertname: 'WebServer.*Down'
          target_match:
            alertname: 'WebBadGateway'
      

   3. Load the new configuration:

      sudo killall -HUP alertmanager
      

   4. Check Alertmanager in a web browser at http://<PROMETHEUS_SERVER_PUBLIC_IP>:9093. The WebBadGateway should no longer appear. You can click the Inhibited box to make it appear again.

3. Challenge

   Silence the `WebServer1Down` Alert

   1. Access Alertmanager in a web browser at http://<PROMETHEUS_SERVER_PUBLIC_IP>:9093.

   2. Expand the service="webserver" group.

   3. Locate the alert with alertname="WebServer1Down", and click the Silence button for that alert.

   4. Fill out the Creator and Comment fields, and then click Create.

   5. If you return to the main Alertmanager page, the WebServer1Down should no longer appear.