Alertmanager

Group and repeat intervals

Set the sum of route.repeat_interval↰ and route.group_interval↰ Alertmanager's options less than incident.timeouts.firing↰ (the explanation is here):

alertmanager.yml

route:
  repeat_interval: 354m
  group_interval: 5m

Inhibition

IMPulse's inhibition is similar to Alertmanager's.

In order for IMPulse to work correctly, you need to move the inhibit_rules section from Alertmanager to IMPulse config as is. This will help avoid the appearance of unnecessary unknown statuses.

Receiver

Set IMPulse as default receiver:

alertmanager.yml

receivers:
  - name: 'impulse'
    webhook_configs:
      - url: 'http://<impulse_host>:<impulse_port>/'

route:
  receiver: 'impulse'

Routing

IMPulse's route is similar to Alertmanager's, but simpler.

If you used alert routing in Alertmanager, the routing rules need to be moved to IMPulse. For this, you can move the entire Alertmanager's route↰ block from alertmanager.yml↰ to impulse.yml↰. Don't forget to remove all unused fields and replace all receiver↰ entries with chain↰ and channel↰. Fill them in correctly.