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For Kubernetes environments, the Datadog Cluster Agent (DCA) can be configured to use the Network Device Monitoring (NDM) auto-discovery logic as a source of cluster checks.
Agent auto-discovery combined with the DCA is scalable. It can monitor a large number of devices.
Below is an example of the cluster-agent-values.yaml:
cluster-agent-values.yaml
datadog:## @param apiKey - string - required## Set this to your Datadog API key before the Agent runs.## ref: https://app.datadoghq.com/account/settings/agent/latest?platform=kubernetes#apiKey:<DATADOG_API_KEY>## @param clusterName - string - optional## Set a unique cluster name to allow scoping hosts and Cluster Checks easily## The name must be unique and must be dot-separated tokens where a token can be up to 40 characters with the following restrictions:## * Lowercase letters, numbers, and hyphens only.## * Must start with a letter.## * Must end with a number or a letter.## Compared to the rules of GKE, dots are allowed whereas they are not allowed on GKE:## https://cloud.google.com/kubernetes-engine/docs/reference/rest/v1beta1/projects.locations.clusters#Cluster.FIELDS.name#clusterName:my-snmp-cluster## @param clusterChecks - object - required## Enable the Cluster Checks feature on both the cluster-agents and the daemonset## ref: https://docs.datadoghq.com/agent/autodiscovery/clusterchecks/## Autodiscovery via Kube Service annotations is automatically enabled#clusterChecks:enabled:true## @param tags - list of key:value elements - optional## List of tags to attach to every metric, event and service check collected by this Agent.#### Learn more about tagging: https://docs.datadoghq.com/tagging/#tags:- 'env:test-snmp-cluster-agent'## @param clusterAgent - object - required## This is the Datadog Cluster Agent implementation that handles cluster-wide## metrics more cleanly, separates concerns for better rbac, and implements## the external metrics API so you can autoscale HPAs based on datadog metrics## ref: https://docs.datadoghq.com/agent/kubernetes/cluster/#clusterAgent:## @param enabled - boolean - required## Set this to true to enable Datadog Cluster Agent#enabled:true## @param confd - list of objects - optional## Provide additional cluster check configurations## Each key will become a file in /conf.d## ref: https://docs.datadoghq.com/agent/autodiscovery/#confd:# Static checkshttp_check.yaml:|- cluster_check: true
instances:
- name: 'Check Example Site1'
url: http://example.net
- name: 'Check Example Site2'
url: http://example.net
- name: 'Check Example Site3'
url: http://example.net# Autodiscovery template needed for `snmp_listener` to create instance configssnmp.yaml:|- cluster_check: true
ad_identifiers:
- snmp
init_config:
instances:
-
## @param ip_address - string - optional
## The IP address of the device to monitor.
#
ip_address: "%%host%%"
## @param port - integer - optional - default: 161
## Default SNMP port.
#
port: "%%port%%"
## @param snmp_version - integer - optional - default: 2
## If you are using SNMP v1 set snmp_version to 1 (required)
## If you are using SNMP v3 set snmp_version to 3 (required)
#
snmp_version: "%%extra_version%%"
## @param timeout - integer - optional - default: 5
## Amount of second before timing out.
#
timeout: "%%extra_timeout%%"
## @param retries - integer - optional - default: 5
## Amount of retries before failure.
#
retries: "%%extra_retries%%"
## @param community_string - string - optional
## Only useful for SNMP v1 & v2.
#
community_string: "%%extra_community%%"
## @param user - string - optional
## USERNAME to connect to your SNMP devices.
#
user: "%%extra_user%%"
## @param authKey - string - optional
## Authentication key to use with your Authentication type.
#
authKey: "%%extra_auth_key%%"
## @param authProtocol - string - optional
## Authentication type to use when connecting to your SNMP devices.
## It can be one of: MD5, SHA, SHA224, SHA256, SHA384, SHA512.
## Default to MD5 when `authKey` is specified.
#
authProtocol: "%%extra_auth_protocol%%"
## @param privKey - string - optional
## Privacy type key to use with your Privacy type.
#
privKey: "%%extra_priv_key%%"
## @param privProtocol - string - optional
## Privacy type to use when connecting to your SNMP devices.
## It can be one of: DES, 3DES, AES, AES192, AES256, AES192C, AES256C.
## Default to DES when `privKey` is specified.
#
privProtocol: "%%extra_priv_protocol%%"
## @param context_engine_id - string - optional
## ID of your context engine; typically unneeded.
## (optional SNMP v3-only parameter)
#
context_engine_id: "%%extra_context_engine_id%%"
## @param context_name - string - optional
## Name of your context (optional SNMP v3-only parameter).
#
context_name: "%%extra_context_name%%"
## @param tags - list of key:value element - optional
## List of tags to attach to every metric, event and service check emitted by this integration.
##
## Learn more about tagging: https://docs.datadoghq.com/tagging/
#
tags:
# The autodiscovery subnet the device is part of.
# Used by Agent autodiscovery to pass subnet name.
- "autodiscovery_subnet:%%extra_autodiscovery_subnet%%"
## @param extra_tags - string - optional
## Comma separated tags to attach to every metric, event and service check emitted by this integration.
## Example:
## extra_tags: "tag1:val1,tag2:val2"
#
extra_tags: "%%extra_tags%%"
## @param oid_batch_size - integer - optional - default: 60
## The number of OIDs handled by each batch. Increasing this number improves performance but
## uses more resources.
#
oid_batch_size: "%%extra_oid_batch_size%%"## @param datadog-cluster.yaml - object - optional## Specify custom contents for the datadog cluster agent config (datadog-cluster.yaml).#datadog_cluster_yaml:# See here for all `network_devices.autodiscovery` configs: https://github.com/DataDog/datadog-agent/blob/master/pkg/config/config_template.yamlautodiscovery:workers:2discovery_interval:10configs:- network:192.168.1.16/29version:2port:1161community:cisco_icm- network:192.168.1.16/29version:2port:1161community:public
Further Reading
Additional helpful documentation, links, and articles: