DATABASES MONGODB DataDog monitors

How to use this module

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

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

Purpose

Creates DataDog monitors with the following checks :

Member down in the replica set

Inputs

Name	Description	Type	Default	Required
delay	Delay in seconds for the metric evaluation	string	`15`	no
environment	Architecture Environment	string	-	yes
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
mongodb_replicaset_time_aggregator	Monitor aggregator for Mongodb replicaset [available values: min, max or avg]	string	`max`	no
mongodb_replicaset_timeframe	Monitor timeframe for Mongodb replicaset [available values: `last_#m` (1, 5, 10, 15, or 30), `last_#h` (1, 2, or 4), or `last_1d`]	string	`last_5m`	no

Outputs

Name	Description
mongodb_replicaset_state_id	id for monitor mongodb_replicaset_state

DataDog documentation: https://docs.datadoghq.com/integrations/mongo/

Custom settings

Prepare your ReplicaSet

Add a user to your ReplicaSet (on the primary instance)

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.

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