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Datadog Fundamentals Certification > Tags > Flashcards

Tags Flashcards

1
Q

What does Datadog use to observe aggregate data points?

A

Tags

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2
Q

What are the reserved tags in Datadog?

A

host: Correlation between metrics, traces, processes, and logs.
device: Segregation of metrics, traces, processes, and logs by device or disk.
source: Span filtering and automated pipeline creation for Log Management.
service: Scoping of application specific data across metrics, traces, and logs.
env: Scoping of application specific data across metrics, traces, and logs.
version: Scoping of application specific data across metrics, traces, and logs.

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3
Q

What level does Datadog recommend looking at containers, VMs, and cloud infrastructure (what tag is used)?

A

service

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4
Q

Are tags required to start with a letter?

A

Yes, tags must start with a letter

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5
Q

A tag must start with a letter but after that may contain what type of characters (there are 6)?

A
  • Alphanumerics
  • Underscores
  • Minuses
  • Colons
  • Periods
  • Slashes
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6
Q

What is the max number of characters for a tag?

A

200 characters

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7
Q

Are tags converted to lowercase?

A

Yes, tags are converted to lowercase

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8
Q

What will infinitely increase the number of metrics for your organization and impact your billing when tagging?

A

Originating tags from unbounded sources, such as epoch timestamps, user IDs, or request IDs

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9
Q

What are the 4 methods for assigning tags?

A

Configuration Files: Manually in your main Agent or integration configuration files.
UI: In the Datadog site.
API: When using Datadog’s API.
DogStatsD: When submitting metrics with DogStatsD.

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10
Q

What tag does the agent automatically assign in a non-containerized environment?

A

The host tag

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11
Q

What allows the Datadog Agent automatically identifies which services are running on this new container, looks for corresponding monitoring configuration, and starts to collect metrics?

A

Autodiscovery

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12
Q

What happens to tagging in a containerized environment when Autodiscovery is not in use?

A

The Agent automatically assigns the host tag and inherits tags from integrations the same as within a non-containerized environments.

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13
Q

How long does the hostname remain in the Datadog UI if you modify it with tags set on the agent configuration?

A

2 hours

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14
Q

How do you graph metrics using an old and new hostname?

A

Use arithmetic between two metrics

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15
Q

What is the most efficient method for assigning tags?

A

Rely on integration inheritance. eg. Tags you assign to your AWS instances, Chef recipes, and other integrations are automatically inherited by hosts and metrics you send to Datadog.

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16
Q

What does Datadog do to CamelCase tags?

A

Converts them to underscores. eg. TestTag –> test_tag

17
Q

How can you set your host tags after installing the containerized Datadog Agent?

A

Using the environment variable DD_TAGS in your Agents main configuration file

18
Q

Datadog automatically collects common tags from Docker, Kubernetes, ECS, Swarm, Mesos, Nomad, and Rancher. What options extract even more tags (there are 5)?

A

DD_CONTAINER_LABELS_AS_TAGS: Extract container labels. This env is equivalent to the old DD_DOCKER_LABELS_AS_TAGS env.
DD_CONTAINER_ENV_AS_TAGS: Extract container environment variables. This env is equivalent to the old DD_DOCKER_ENV_AS_TAGS env.
DD_KUBERNETES_POD_LABELS_AS_TAGS: Extract pod labels
DD_CHECKS_TAG_CARDINALITY: Add tags to check metrics (low, orchestrator, high)
DD_DOGSTATSD_TAG_CARDINALITY: Add tags to custom metrics (low, orchestrator, high)

19
Q

Can you use wildcards in the format when using DD_KUBERNETES_POD_LABELS_AS_TAGS?

A

Yes

20
Q

hat do you need to do when using the DD_CONTAINER_LABELS_AS_TAGS variable within a Docker Swarm docker-compose.yaml file?

A

Remove the apostrophes

21
Q

Where should you place labels if the container needs to be labeled outside of the docker-compose.yaml file?

A

Place the labels: keyword inside the services: section not inside the deploy: section

22
Q

When is the only time you should place the labels: keyword inside the deploy: section?

A

Only when the service needs to be labeled. The Datadog Agent does not have any labels to extract from the containers without this placement.

23
Q

What are the two environment variables that set tag cardinality?

A

DD_CHECKS_TAG_CARDINALITY
DD_DOGSTATSD_TAG_CARDINALITY

24
Q

Why is the DD_DOGSTATSD_TAG_CARDINALITY setting separated for finer configuration than the DD_CHECKS_TAG_CARDINALITY?

A

DogStatsD is priced differently

25
Q

What are the values for the DD_CHECKS_TAG_CARDINALITY and DD_DOGSTATSD_TAG_CARDINALITY variables and what is their default?

A

Low, orchestrator, or high. They both default to low, which pulls in host-level tags.

26
Q

What does setting the DD_DOGSTATSD_TAG_CARDINALITY variable to orchestrator do for ECS and Fargate?

A

Adds the task_arn tag

Datadog Fundamentals Certification (2 decks)

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