Use this data source to get information about a specific escalation policy that you can use for other PagerDuty resources.
data "pagerduty_escalation_policy" "test" {
  name = "Engineering Escalation Policy"
}
resource "pagerduty_service" "test" {
  name                    = "My Web App"
  auto_resolve_timeout    = 14400
  acknowledgement_timeout = 600
  escalation_policy       = "${data.pagerduty_escalation_policy.test.id}"
}
The following arguments are supported:
name - (Required) The name to use to find an escalation policy in the PagerDuty API. name - The short name of the found escalation policy. 
    © 2018 HashiCorpLicensed under the MPL 2.0 License.
    https://www.terraform.io/docs/providers/pagerduty/d/escalation_policy.html