make uptime alert duration configurable

modules/prober/README.md

@@ -127,6 +127,7 @@ No requirements.
 | <a name="input_slo_threshold"></a> [slo\_threshold](#input\_slo\_threshold) | The uptime percent required to meet the SLO for the service, expressed as a decimal in {0, 1} | `number` | `0.999` | no |
 | <a name="input_squad"></a> [squad](#input\_squad) | squad label to apply to the service. | `string` | `""` | no |
 | <a name="input_timeout"></a> [timeout](#input\_timeout) | The timeout for the prober in seconds. | `string` | `"60s"` | no |
+| <a name="input_uptime_alert_duration"></a> [uptime\_alert\_duration](#input\_uptime\_alert\_duration) | duration for uptime alert policy. | `string` | `"600s"` | no |
 | <a name="input_working_dir"></a> [working\_dir](#input\_working\_dir) | The working directory that contains the importpath. | `string` | n/a | yes |
 
 ## Outputs

modules/prober/alert.tf

@@ -17,14 +17,14 @@ resource "google_monitoring_alert_policy" "uptime_alert" {
   conditions {
     condition_threshold {
       aggregations {
-        alignment_period     = "300s"
+        alignment_period     = "60s"
         cross_series_reducer = "REDUCE_COUNT_FALSE"
         group_by_fields      = ["resource.*"]
         per_series_aligner   = "ALIGN_NEXT_OLDER"
       }
 
       comparison = "COMPARISON_GT"
-      duration   = "60s"
+      duration   = var.uptime_alert_duration
       filter     = <<-EOT
         metric.type="monitoring.googleapis.com/uptime_check/check_passed"
         resource.type="uptime_url"

modules/prober/main.tf

@@ -25,8 +25,8 @@ module "this" {
   regions    = var.regions
   scaling    = var.scaling
 
-  squad            = var.squad
-  require_squad    = var.require_squad
+  squad         = var.squad
+  require_squad = var.require_squad
 
   // If we're using GCLB then disallow external traffic,
   // otherwise allow the prober URI to be used directly.

modules/prober/variables.tf

@@ -115,6 +115,12 @@ variable "alert_description" {
   description = "Alert documentation. Use this to link to playbooks or give additional context."
 }
 
+variable "uptime_alert_duration" {
+  type        = string
+  default     = "600s"
+  description = "duration for uptime alert policy."
+}
+
 variable "notification_channels" {
   description = "A list of notification channels to send alerts to."
   type        = list(string)