Cluster Agent Troubleshooting
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This document contains troubleshooting information for the following components:
Datadog Cluster Agent
To execute the troubleshooting commands for the Cluster Agent, you first need to be inside the Cluster Agent or the node-based Agent pod. For this, use:
kubectl exec -it <DATADOG_CLUSTER_AGENT_POD_NAME> bash
To see what cluster level metadata is served by the Datadog Cluster Agent, run:
You should see the following result:
root@datadog-cluster-agent-8568545574-x9tc9:/# agent metamap
===============
Metadata Mapper
===============
Node detected: gke-test-default-pool-068cb9c0-sf1w
- Namespace: kube-system
- Pod: kube-dns-788979dc8f-hzbj5
Services: [kube-dns]
- Pod: kube-state-metrics-5587867c9f-xllnm
Services: [kube-state-metrics]
- Pod: kubernetes-dashboard-598d75cb96-5khmj
Services: [kubernetes-dashboard]
Node detected: gke-test-default-pool-068cb9c0-wntj
- Namespace: default
- Pod: datadog-cluster-agent-8568545574-x9tc9
Services: [datadog-custom-metrics-server dca]
- Namespace: kube-system
- Pod: heapster-v1.5.2-6d59ff54cf-g7q4h
Services: [heapster]
- Pod: kube-dns-788979dc8f-q9qkt
Services: [kube-dns]
- Pod: l7-default-backend-5d5b9874d5-b2lts
Services: [default-http-backend]
- Pod: metrics-server-v0.2.1-7486f5bd67-v827f
Services: [metrics-server]
To verify that the Datadog Cluster Agent is being queried, look for:
root@datadog-cluster-agent-8568545574-x9tc9:/# tail -f /var/log/datadog/cluster-agent.log
2018-06-11 09:37:20 UTC | DEBUG | (metadata.go:40 in GetPodMetadataNames) | CacheKey: agent/KubernetesMetadataMapping/ip-192-168-226-77.ec2.internal, with 1 services
2018-06-11 09:37:20 UTC | DEBUG | (metadata.go:40 in GetPodMetadataNames) | CacheKey: agent/KubernetesMetadataMapping/ip-192-168-226-77.ec2.internal, with 1 services
If you are not collecting events properly, ensure that DD_LEADER_ELECTION
and DD_COLLECT_KUBERNETES_EVENTS
are set to true
, as well as the proper verbs listed in the RBAC (notably, watch events
).
If you have enabled those, check the leader election status and the kube_apiserver
check with the following command:
This should produce the following result:
root@datadog-cluster-agent-8568545574-x9tc9:/# agent status
[...]
Leader Election
===============
Leader Election Status: Running
Leader Name is: datadog-cluster-agent-8568545574-x9tc9
Last Acquisition of the lease: Mon, 11 Jun 2018 06:38:53 UTC
Renewed leadership: Mon, 11 Jun 2018 09:41:34 UTC
Number of leader transitions: 2 transitions
[...]
Running Checks
==============
kubernetes_apiserver
--------------------
Total Runs: 736
Metrics: 0, Total Metrics: 0
Events: 0, Total Events: 100
Service Checks: 3, Total Service Checks: 2193
[...]
Node Agent
You can check the status of the Datadog Cluster Agent by running the Agent status command:
agent status
If the Datadog Cluster Agent is enabled and correctly configured, you should see:
[...]
=====================
Datadog Cluster Agent
=====================
- Datadog Cluster Agent endpoint detected: https://XXX.XXX.XXX.XXX:5005
Successfully Connected to the Datadog Cluster Agent.
- Running: {Major:1 Minor:0 Pre:xxx Meta:xxx Commit:xxxxx}
Make sure the Cluster Agent service was created before the Agents’ Pods, so that the DNS is available in the environment variables:
root@datadog-agent-9d5bl:/# env | grep DATADOG_CLUSTER_AGENT | sort
DATADOG_CLUSTER_AGENT_PORT=tcp://10.100.202.234:5005
DATADOG_CLUSTER_AGENT_PORT_5005_TCP=tcp://10.100.202.234:5005
DATADOG_CLUSTER_AGENT_PORT_5005_TCP_ADDR=10.100.202.234
DATADOG_CLUSTER_AGENT_PORT_5005_TCP_PORT=5005
DATADOG_CLUSTER_AGENT_PORT_5005_TCP_PROTO=tcp
DATADOG_CLUSTER_AGENT_SERVICE_HOST=10.100.202.234
DATADOG_CLUSTER_AGENT_SERVICE_PORT=5005
DATADOG_CLUSTER_AGENT_SERVICE_PORT_AGENTPORT=5005
root@datadog-agent-9d5bl:/# echo ${DD_CLUSTER_AGENT_AUTH_TOKEN}
DD_CLUSTER_AGENT_AUTH_TOKEN=1234****9
Further Reading
Documentation, liens et articles supplémentaires utiles: