feat: add accountapp login synthetic monitor

Ref: jenkins-infra/helpdesk#1323

Jenkinsfile_k8s

@@ -8,11 +8,13 @@ parallel(
         // TODO: create an empty account for staging
         string(variable: 'TF_VAR_datadog_api_key', credentialsId: 'datadog-api-key'),
         string(variable: 'TF_VAR_datadog_app_key', credentialsId: 'datadog-app-key'),
+        string(variable: 'TF_VAR_datadog_jenkinsuser_password', credentialsId: 'datadog-jenkinsuser-password'),
         file(variable: 'BACKEND_CONFIG_FILE', credentialsId: 'production-terraform-datadog-backend-config'),
       ],
       productionCredentials: [
         string(variable: 'TF_VAR_datadog_api_key', credentialsId: 'datadog-api-key'),
         string(variable: 'TF_VAR_datadog_app_key', credentialsId: 'datadog-app-key'),
+        string(variable: 'TF_VAR_datadog_jenkinsuser_password', credentialsId: 'datadog-jenkinsuser-password'),
         file(variable: 'BACKEND_CONFIG_FILE', credentialsId: 'production-terraform-datadog-backend-config'),
       ],
     )

synthetics_accountapp-login.tf

@@ -0,0 +1,28 @@
+resource "datadog_synthetics_test" "accountapp-login" {
+  type = "api"
+  request_definition {
+    method = "POST"
+    url    = "https://accounts.jenkins.io/doLogin"
+    body   = "userid=datadog_monitoring&password=${datadog_jenkinsuser_password}"
+  }
+  request_headers {
+    Content-Type   = "application/x-www-form-urlencoded"
+  }
+  assertion {
+    type     = "statusCode"
+    operator = "is"
+    target   = "302"
+  }
+  locations = ["aws:eu-central-1"]
+  options_list {
+    tick_every = 900
+  }
+  name    = "login account.jenkins.io"
+  message = "Notify @pagerduty"
+  tags = [
+    "jenkins.io",
+    "production"
+  ]
+
+  status = "live"
+}

variables.tf

@@ -1,2 +1,3 @@
 variable "datadog_api_key" {}
 variable "datadog_app_key" {}
+variable "datadog_jenkinsuser_password" {}