netdata/docs/dashboards-and-charts/kubernetes-tab.md

Kubernetes tab

The Netdata dashboards feature enhanced visualizations for the resource utilization of Kubernetes (k8s) clusters, embedded in the default Metrics tab dashboard.

These visualizations include a health map for viewing the status of k8s pods/containers, in addition to Netdata charts for viewing per-second CPU, memory, disk, and networking metrics from k8s nodes.

See our Kubernetes deployment instructions for details on deploying Netdata on your Kubernetes cluster.

Available Kubernetes metrics

Netdata Cloud organizes and visualizes the following metrics from your Kubernetes cluster from every container:

Metric	Description
k8s.cgroup.cpu_limit	CPU utilization as a percentage of the limit defined by the pod specification spec.containers[].resources.limits.cpu or a LimitRange object.
k8s.cgroup.cpu	CPU utilization of the pod/container. 100% usage equals 1 fully-utilized core, 200% equals 2 fully-utilized cores, and so on.
k8s.cgroup.throttled	The percentage of runnable periods when tasks in a cgroup have been throttled.
k8s.cgroup.throttled_duration	The total time duration for which tasks in a cgroup have been throttled.
k8s.cgroup.mem_utilization	Memory utilization within the configured or system-wide (if not set) limits.
k8s.cgroup.mem_usage_limit	Memory utilization, without cache, as a percentage of the limit defined by the pod specification spec.containers[].resources.limits.memory or a LimitRange object.
k8s.cgroup.mem_usage	Used memory, without cache.
k8s.cgroup.mem	The sum of cache and rss (resident set size) memory usage.
k8s.cgroup.writeback	The size of dirty and writeback cache.
k8s.cgroup.pgfaults	Sum of page fault bandwidth, which are raised when the Kubernetes cluster tries accessing a memory page that is mapped into the virtual address space, but not actually loaded into main memory.
k8s.cgroup.throttle_io	Sum of read and write per second across all PVs/PVCs attached to the container.
k8s.cgroup.throttle_serviced_ops	Sum of the read and write operations per second across all PVs/PVCs attached to the container.
k8s.cgroup.net_net	Sum of received and sent bandwidth per second.
k8s.cgroup.net_packets	Sum of multicast, received, and sent packets.

When viewing the overview of this dashboard, Netdata presents the above metrics per container, or aggregated based on their associated pods.

Kubernetes Containers overview

At the top of the Kubernetes containers section, there is a map that with a given context colorizes the containers in terms of their utilization.

The filtering of this map is controlled by using the NIDL framework from the definition bar of the chart.

Detailed information

Hover over any of the pods/containers in the map to display a modal window, which contains contextual information and real-time metrics from that resource.