<p>I have a <code>Prometheus</code> monitoring running on <code>Kubernetes</code> cluster. I want to receive SMS notification when my alerts firing.
How should i set my number for receive SMS in <code>Alertmanager</code>?</p>

<p>Couple options coming from official docs: <a href="https://prometheus.io/docs/alerting/configuration/" rel="nofollow noreferrer">https://prometheus.io/docs/alerting/configuration/</a></p>

<p>Option 1. If you have PagerDuty / VictorOps subscription use <a href="https://prometheus.io/docs/alerting/configuration/#pagerduty_config" rel="nofollow noreferrer">https://prometheus.io/docs/alerting/configuration/#pagerduty_config</a> receiver, and setup SMS rule inside the service. </p>

<p>Option 2. Use a webhook receiver <a href="https://prometheus.io/docs/alerting/configuration/#webhook_config" rel="nofollow noreferrer">https://prometheus.io/docs/alerting/configuration/#webhook_config</a> 
Set it to send notification to AWS SNS <a href="https://docs.aws.amazon.com/sns/latest/dg/sns-http-https-endpoint-as-subscriber.html" rel="nofollow noreferrer">https://docs.aws.amazon.com/sns/latest/dg/sns-http-https-endpoint-as-subscriber.html</a>, then use AWS SNS to send an SMS. Or use any other webhook based SMS sender.</p>
