Configuring Alert Manager to use Slack

Open the Alertmanager configuration:

 $ sudo $EDITOR /etc/alertmanager/alertmanager.yml

Set the default route’s repeat_interval to one minute and update the receiver to use our Slack endpoint:

 route:
   receiver: 'slack'
   group_by: ['alertname']
   group_wait: 10s
   group_interval: 10s
   repeat_interval: 1m

Create a secondary route that will send severe: page alerts to the Slack receiver; group by the team label:

 route:
   receiver: 'slack'
   group_by: ['alertname']
   group_wait: 10s
   group_interval: 10s
   repeat_interval: 1m
   routes:
     - match:
         severity: page
       group_by: ['team']
       receiver: 'slack'

Add a tertiary route that sends all alerts for the devops team to Slack:

 route:
   receiver: 'slack'
   group_by: ['alertname']
   repeat_interval: 1m
   routes:
     - match:
         severity: page
       group_by: ['team']
       receiver: 'slack'
       routes:
         - match:
             team: devops
           receiver: 'slack'

Update the receiver to use Slack:

 receivers:
 - name: 'slack'
   slack_configs:
     - channel: "#prometheus"
       api_url: APIKEY
       text: "Overview: {{ .CommonAnnotations.overview }}"

Update the inhibit_rules so that any alerts with the severity of ticket for the DevOps team are suppressed when a page-level alert is happening:
```
 inhibit_rules:
   - source_match:
       severity: 'page'
     target_match:
       severity: 'ticket'
     equal: ['team']
```
Save and exit.
Restart Alertmanager:
```
 $ sudo systemctl restart alertmanager
```
View your Slack chat and wait to see the firing alert.

Configuring Alert Manager to use Slack

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