MON-402 Add Total connection threshold variables

cloud/azure/mysql/README.md

@@ -22,7 +22,7 @@ Creates DataDog monitors with the following checks:
 - Mysql Server IO consumption
 - Mysql Server memory usage
 - Mysql Server storage
-- Mysql Server total connection reach 80 percent of the total limit
+- Mysql Server total connection reach
 
 ## Inputs
 
@@ -68,9 +68,11 @@ Creates DataDog monitors with the following checks:
 | new\_host\_delay | Delay in seconds before monitor new resource | string | `"300"` | no |
 | total\_connection\_enabled | Flag to enable Mysql status monitor | string | `"true"` | no |
 | total\_connection\_extra\_tags | Extra tags for Mysql status monitor | list | `[]` | no |
-| total\_connection\_limit | Limit for Mysql total connection [See details : https://docs.microsoft.com/en-us/azure/mysql/concepts-limits] | string | `""` | no |
+| total\_connection\_limit | Limit for Mysql total connection [See details : https://docs.microsoft.com/en-us/azure/mysql/concepts-limits] | string | n/a | yes |
 | total\_connection\_message | Custom message for Mysql total connection monitor | string | `""` | no |
 | total\_connection\_silenced | Groups to mute for Mysql total connection monitor | map | `{}` | no |
+| total\_connection\_threshold\_critical | Mysql total connection threshold in percent (critical threshold) | string | `"80"` | no |
+| total\_connection\_threshold\_warning | Mysql total connection threshold in percent (warning threshold) | string | `"70"` | no |
 | total\_connection\_time\_aggregator | Monitor aggregator for Mysql total connection [available values: min, max or avg] | string | `"min"` | no |
 | total\_connection\_timeframe | Monitor timeframe for Mysql total connection [available values: `last_#m` (1, 5, 10, 15, or 30), `last_#h` (1, 2, or 4), or `last_1d`] | string | `"last_5m"` | no |
 

cloud/azure/mysql/inputs.tf

@@ -115,7 +115,16 @@ variable "total_connection_timeframe" {
 variable "total_connection_limit" {
   description = "Limit for Mysql total connection [See details : https://docs.microsoft.com/en-us/azure/mysql/concepts-limits]"
   type        = "string"
-  default     = ""
+}
+
+variable "total_connection_threshold_warning" {
+  description = "Mysql total connection threshold in percent (warning threshold)"
+  default     = "70"
+}
+
+variable "total_connection_threshold_critical" {
+  description = "Mysql total connection threshold in percent (critical threshold)"
+  default     = "80"
 }
 
 variable "free_storage_silenced" {

cloud/azure/mysql/monitors-mysql.tf

@@ -33,17 +33,22 @@ resource "datadog_monitor" "mysql_cpu_usage" {
 
 resource "datadog_monitor" "mysql_total_connection" {
   count   = "${var.total_connection_enabled ? 1 : 0}"
-  name    = "[${var.environment}] Mysql Server total connection reach 80 percent of the total limit"
+  name    = "[${var.environment}] Mysql Server total connection reach {{#is_alert}} {{threshold}}% ({{value}}%){{/is_alert}}{{#is_warning}} {{warn_threshold}}% ({{value}}%){{/is_warning}} of the total limit"
   message = "${coalesce(var.total_connection_message, var.message)}"
 
   query = <<EOF
     ${var.total_connection_time_aggregator}(${var.total_connection_timeframe}): (
       avg:azure.dbformysql_servers.active_connections${module.filter-tags.query_alert} by {resource_group,region,name} / ${var.total_connection_limit}
-    ) * 100 > 80
+    ) * 100 > "${var.total_connection_threshold_critical}"
   EOF
 
   type = "metric alert"
 
+  thresholds {
+    critical = "${var.total_connection_threshold_critical}"
+    warning  = "${var.total_connection_threshold_warning}"
+  }
+
   silenced = "${var.total_connection_silenced}"
 
   notify_no_data      = true