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component/datadog-monitor
layer/datadog
provider/aws
provider/datadog

Component: datadog-monitor

This component is responsible for provisioning Datadog monitors and assigning Datadog roles to the monitors.

It depends on the datadog-configuration component to get the Datadog API keys.

Usage

Stack Level: Regional

Here's an example snippet for how to use this component:

components:
  terraform:
    datadog-monitor:
      settings:
        spacelift:
          workspace_enabled: true
      vars:
        enabled: true
        local_datadog_monitors_config_paths:
          - "catalog/monitors/dev/*.yaml"

Conventions

Adjust Thresholds per Stack

Since there are so many parameters that may be adjusted for a given monitor, we define all monitors through YAML. By convention, we define the default monitors that should apply to all environments, and then adjust the thresholds per environment. This is accomplished using the datadog-monitor components variable local_datadog_monitors_config_paths which defines the path to the YAML configuration files. By passing a path for dev and prod, we can define configurations that are different per environment.

For example, you might have the following settings defined for prod and dev stacks that override the defaults.

For the dev stack:

components:
  terraform:
    datadog-monitor:
      vars:
        # Located in the components/terraform/datadog-monitor directory
        local_datadog_monitors_config_paths:
          - catalog/monitors/*.yaml
          - catalog/monitors/dev/*.yaml # note this line

For prod stack:

components:
  terraform:
    datadog-monitor:
      vars:
        # Located in the components/terraform/datadog-monitor directory
        local_datadog_monitors_config_paths:
          - catalog/monitors/*.yaml
          - catalog/monitors/prod/*.yaml # note this line

Behind the scenes (with atmos) we fetch all files from these glob patterns, template them, and merge them by key. If we peek into the *.yaml and dev/*.yaml files above you could see an example like this:

components/terraform/datadog-monitor/catalog/monitors/elb.yaml

elb-lb-httpcode-5xx-notify:
  name: "(ELB) {{ env }} HTTP 5XX client error detected"
  type: query alert
  query: |
    avg(last_15m):max:aws.elb.httpcode_elb_5xx{${context_dd_tags}} by {env,host} > 20
  message: |
    [${ dd_env }] [ {{ env }} ] lb:[ {{host}} ]
    {{#is_warning}}
    Number of HTTP 5XX client error codes generated by the load balancer > {{warn_threshold}}%
    {{/is_warning}}
    {{#is_alert}}
    Number of HTTP 5XX client error codes generated by the load balancer > {{threshold}}%
    {{/is_alert}}
    Check LB
  escalation_message: ""
  tags: {}
  options:
    renotify_interval: 60
    notify_audit: false
    require_full_window: true
    include_tags: true
    timeout_h: 0
    evaluation_delay: 60
    new_host_delay: 300
    new_group_delay: 0
    groupby_simple_monitor: false
    renotify_occurrences: 0
    renotify_statuses: []
    validate: true
    notify_no_data: false
    no_data_timeframe: 5
    priority: 3
    threshold_windows: {}
    thresholds:
      critical: 50
      warning: 20
  priority: 3
  restricted_roles: null

components/terraform/datadog-monitor/catalog/monitors/dev/elb.yaml

elb-lb-httpcode-5xx-notify:
  query: |
    avg(last_15m):max:aws.elb.httpcode_elb_5xx{${context_dd_tags}} by {env,host} > 30
  priority: 2
  options:
    thresholds:
      critical: 30
      warning: 10

Key Notes

Inheritance

The important thing to note here is that the default yaml is applied to every stage that it's deployed to. For dev specifically however, we want to override the thresholds and priority for this monitor. This merging is done by key of the monitor, in this case elb-lb-httpcode-5xx-notify.

Templating

The second thing to note is ${ dd_env }. This is terraform templating in action. While double braces ({{ env }}) refers to datadog templating, ${ dd_env } is a template variable we pass into our monitors. in this example we use it to specify a grouping int he message. This value is passed in and can be overridden via stacks.

We pass a value via:

components:
  terraform:
    datadog-monitor:
      vars:
        # Located in the components/terraform/datadog-monitor directory
        local_datadog_monitors_config_paths:
          - catalog/monitors/*.yaml
          - catalog/monitors/dev/*.yaml
        # templatefile() is used for all yaml config paths with these variables.
        datadog_monitors_config_parameters:
          dd_env: "dev"

This allows us to further use inheritance from stack configuration to keep our monitors dry, but configurable.

Another available option is to use our catalog as base monitors and then override them with your specific fine tuning.

components:
  terraform:
    datadog-monitor:
      vars:
        local_datadog_monitors_config_paths:
          - https://raw.githubusercontent.com/cloudposse/terraform-datadog-platform/0.27.0/catalog/monitors/ec2.yaml
          - catalog/monitors/ec2.yaml

Other Gotchas

Our integration action that checks for 'source_type_name' equals 'Monitor Alert' will also be true for synthetics. Whereas if we check for 'event_type' equals 'query_alert_monitor', that's only true for monitors, because synthetics will only be picked up by an integration action when event_type is synthetics_alert.

This is important if we need to distinguish between monitors and synthetics in OpsGenie, which is the case when we want to ensure clean messaging on OpsGenie incidents in Statuspage.

Requirements

Name Version
terraform >= 1.0.0
aws >= 4.9.0
datadog >= 3.3.0

Providers

No providers.

Modules

Name Source Version
datadog_configuration ../datadog-configuration/modules/datadog_keys n/a
datadog_monitors cloudposse/platform/datadog//modules/monitors 1.4.1
datadog_monitors_merge cloudposse/config/yaml//modules/deepmerge 1.0.2
iam_roles ../account-map/modules/iam-roles n/a
local_datadog_monitors_yaml_config cloudposse/config/yaml 1.0.2
remote_datadog_monitors_yaml_config cloudposse/config/yaml 1.0.2
this cloudposse/label/null 0.25.0

Resources

No resources.

Inputs

Name Description Type Default Required
additional_tag_map Additional key-value pairs to add to each map in tags_as_list_of_maps. Not added to tags or id.
This is for some rare cases where resources want additional configuration of tags
and therefore take a list of maps with tag key, value, and additional configuration.		 map(string) {} no
alert_tags List of alert tags to add to all alert messages, e.g. ["@opsgenie"] or ["@devops", "@opsgenie"] list(string) null no
alert_tags_separator Separator for the alert tags. All strings from the alert_tags variable will be joined into one string using the separator and then added to the alert message string "\n" no
attributes ID element. Additional attributes (e.g. workers or cluster) to add to id,
in the order they appear in the list. New attributes are appended to the
end of the list. The elements of the list are joined by the delimiter
and treated as a single ID element.		 list(string) [] no
context Single object for setting entire context at once.
See description of individual variables for details.
Leave string and numeric variables as null to use default value.
Individual variable settings (non-null) override settings in context object,
except for attributes, tags, and additional_tag_map, which are merged.		 any 
{
  "additional_tag_map": {},
  "attributes": [],
  "delimiter": null,
  "descriptor_formats": {},
  "enabled": true,
  "environment": null,
  "id_length_limit": null,
  "label_key_case": null,
  "label_order": [],
  "label_value_case": null,
  "labels_as_tags": [
    "unset"
  ],
  "name": null,
  "namespace": null,
  "regex_replace_chars": null,
  "stage": null,
  "tags": {},
  "tenant": null
}
 no
datadog_monitor_context_tags List of context tags to add to each monitor set(string) 
[
  "namespace",
  "tenant",
  "environment",
  "stage"
]
 no
datadog_monitor_context_tags_enabled Whether to add context tags to each monitor bool true no
datadog_monitor_globals Global parameters to add to each monitor any {} no
datadog_monitors_config_parameters Map of parameters to Datadog monitor configurations map(any) {} no
delimiter Delimiter to be used between ID elements.
Defaults to - (hyphen). Set to "" to use no delimiter at all.		 string null no
descriptor_formats Describe additional descriptors to be output in the descriptors output map.
Map of maps. Keys are names of descriptors. Values are maps of the form
{<br> format = string<br> labels = list(string)<br>}
(Type is any so the map values can later be enhanced to provide additional options.)
format is a Terraform format string to be passed to the format() function.
labels is a list of labels, in order, to pass to format() function.
Label values will be normalized before being passed to format() so they will be
identical to how they appear in id.
Default is {} (descriptors output will be empty).		 any {} no
enabled Set to false to prevent the module from creating any resources bool null no
environment ID element. Usually used for region e.g. 'uw2', 'us-west-2', OR role 'prod', 'staging', 'dev', 'UAT' string null no
id_length_limit Limit id to this many characters (minimum 6).
Set to 0 for unlimited length.
Set to null for keep the existing setting, which defaults to 0.
Does not affect id_full.		 number null no
label_key_case Controls the letter case of the tags keys (label names) for tags generated by this module.
Does not affect keys of tags passed in via the tags input.
Possible values: lower, title, upper.
Default value: title.		 string null no
label_order The order in which the labels (ID elements) appear in the id.
Defaults to ["namespace", "environment", "stage", "name", "attributes"].
You can omit any of the 6 labels ("tenant" is the 6th), but at least one must be present.		 list(string) null no
label_value_case Controls the letter case of ID elements (labels) as included in id,
set as tag values, and output by this module individually.
Does not affect values of tags passed in via the tags input.
Possible values: lower, title, upper and none (no transformation).
Set this to title and set delimiter to "" to yield Pascal Case IDs.
Default value: lower.		 string null no
labels_as_tags Set of labels (ID elements) to include as tags in the tags output.
Default is to include all labels.
Tags with empty values will not be included in the tags output.
Set to [] to suppress all generated tags.
Notes:
The value of the name tag, if included, will be the id, not the name.
Unlike other null-label inputs, the initial setting of labels_as_tags cannot be
changed in later chained modules. Attempts to change it will be silently ignored.		 set(string) 
[
  "default"
]
 no
local_datadog_monitors_config_paths List of paths to local Datadog monitor configurations list(string) [] no
message_postfix Additional information to put after each monitor message string "" no
message_prefix Additional information to put before each monitor message string "" no
name ID element. Usually the component or solution name, e.g. 'app' or 'jenkins'.
This is the only ID element not also included as a tag.
The "name" tag is set to the full id string. There is no tag with the value of the name input.		 string null no
namespace ID element. Usually an abbreviation of your organization name, e.g. 'eg' or 'cp', to help ensure generated IDs are globally unique string null no
regex_replace_chars Terraform regular expression (regex) string.
Characters matching the regex will be removed from the ID elements.
If not set, "/[^a-zA-Z0-9-]/" is used to remove all characters other than hyphens, letters and digits.		 string null no
region AWS Region string n/a yes
remote_datadog_monitors_base_path Base path to remote Datadog monitor configurations string "" no
remote_datadog_monitors_config_paths List of paths to remote Datadog monitor configurations list(string) [] no
stage ID element. Usually used to indicate role, e.g. 'prod', 'staging', 'source', 'build', 'test', 'deploy', 'release' string null no
tags Additional tags (e.g. {'BusinessUnit': 'XYZ'}).
Neither the tag keys nor the tag values will be modified by this module.		 map(string) {} no
tenant ID element _(Rarely used, not included by default)_. A customer identifier, indicating who this instance of a resource is for string null no

Outputs

Name Description
datadog_monitor_names Names of the created Datadog monitors

Related How-to Guides

Component Dependencies

References