Kubernetes Data Collector

Contributors netapp-alavoie dgracenetapp

Cloud Insights uses this data collector to gather Kubernetes Pod, Node, and Container metrics.

Installation

For Kubernetes Installation instructions, please see the Agent Installation page.

Note Information about kube-state-metrics has been moved to the Agent Installation page.

Objects and Counters

The following objects and their counters are collected:

Object: Identifiers: Attributes: Datapoints:

Kubernetes Container

Namespace
Pod
Container
Cluster

Kubernetes Node
Node Name
Node OS
Node UUID
Node IP

CPU Nanoseconds
CPU Usage Nanocores
Memory Major Page Faults
Memory Resident Set Size (RSS)
Memory Working Set
Memory Page Faults
Memory Usage
Root Filesystem Available
Root Filesystem Capacity
Root Filesystem Used

Kubernetes Node

Kubernetes Node
Cluster

Node Name
Node OS
Node UUID
Node IP

CPU Usage Nanocores
CPU Usage Nanoseconds
Filesystem Available
Filesystem Total
Filesystem Used
Memory Available
Memory Usage
Memory Major Page Faults
Memory Page Faults
Memory Resident Set Size (RSS)
Memory Working Set
Network RX Errors (per sec)
Network RX Bytes (per sec)
Network TX Errors (per sec)
Network TX Bytes (per sec)
Runtime Image Filesystem Available
Runtime Image Filesystem Used
Runtime Image Filesystem Capacity

Kubernetes Pod

Namespace
Pod
Cluster

Kubernetes Node
Node Name
Node IP
Node OS
Node UUID

Network TX Bytes (per sec)
Network TX Errors (per sec)
Network RX Bytes (per sec)
Network RX Errors (per sec)

Kubernetes Pod Volume

Volume
Pod
Cluster
Namespace

Kubernetes Node
Node Name
Node UUID
Node IP
Node OS

Available
Capacity
Used

Kubernetes System Container

System Container
Kubernetes Node
Cluster

Node Name
Node IP
Node OS
Node UUID

CPU Usage Nanocores
CPU Usage Core Nanoseconds
Memory Major Page Faults
Memory Page Faults
Memory Resident Set Size (RSS)
Memory Usage
Memory Working Set
Root Filesystem Available
Root Filesystem Capacity
Logs Filesystem Available
Logs Filesystem Capacity

Troubleshooting

Problem: Try this:

I ran the Kubernetes agent installer command, but I do not see a Telegraf agent pod running via:

sudo kubectl --namespace ci-monitoring get pods

Check if there were any errors deploying the DaemonSet:

sudo kubectl --namespace ci-monitoring describe ds telegraf-ds

If there are errors related to SecurityContextConstraints, do the following:

1. Generate the Telegraf DaemonSet YAML

sudo kubectl --namespace ci-monitoring get ds telegraf-ds -o yaml > /tmp/telegraf-ds.yaml

2. Stop the Telegraf service

sudo kubectl --namespace ci-monitoring delete ds telegraf-ds

3. Create the necessary SecurityContextConstraint (see "Configuring Agent to Collect Data" section)

4. Re-create the Telegraf DaemonSet

I configured Telegraf to obtain information about my Kubernetes cluster, but I don’t see any information in Cloud Insights. I see "invalid header field value" errors in the Telegraf log file pertaining to the kubernetes input plugin I configured.

Ensure the referenced bearer_token file does not have a trailing newline. To verify, run the following command, and confirm that it returns 0:

tail -c1 <bearer_token_file>

Additional information may be found from the Support page.