use admin  
db.auth("admin", "admin-password") ## This is optional is you don't have any admin password  
db.createUser({"user":"datadog", "pwd": "{{PASSWORD}}", "roles" : [ {role: 'read', db: 'admin' }, {role: 'clusterMonitor', db: 'admin'}, {role: 'read', db: 'local' }]})

Configure your Datadog agent

Add this file conf.d/mongo.yaml


init_config:

instances:
      -   server: mongodb://datadog:password@[MONGO_URI]
          tags:
              - mytag1
              - mytag2
      -   server: mongodb://datadog:password@[MONGO_URI]
          tags:
              - mytag1
              - mytag2

Monitor ReplicaSet Health

Name: [environment] Replica Set heath for {{ replset_name }}

This monitor will check the health of your ReplicaSet

Metrics are :

1: The replicaSet is OK
0: The replicaSet is KO

This monitor will trigger an alert for each ReplicaSet.

How to use this module

module "datadog-monitors-aws-mongodb" {
  source = "git::ssh://git@bitbucket.org/morea/terraform.feature.datadog.git//databases/mongodb?ref={revision}"

  message     = "${module.datadog-message-alerting.alerting-message}"
  environment = "${var.environment}"

}

Purpose

Creates a DataDog monitors with the following checks :

Mongodb ReplicaSet status

Inputs

Name	Description	Type	Default	Required
environment	Architecture Environment	string	-	yes
delay	Delay in seconds for the metric evaluation	string	`15`	no
filter_tags_custom	Tags used for custom filtering when filter_tags_use_defaults is false	string	`*`	no
filter_tags_use_defaults	Use default filter tags convention	string	`true`	no
message	Message sent when an alert is triggered	string	-	yes
mongodb_replicaset_message	Custom message for Mongodb replicaset monitor	string	``	no
mongodb_replicaset_silenced	Groups to mute for Mongodb replicaset monitor	map	`<map>`	no