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Foglight for Container Management 4.0 - User Guide

Understanding Foglight for Container Management Using Foglight for Container Management Reference

Kubernetes Nodes Summary view

The Kubernetes Nodes Summary view appears on the right when you select a node in the Kubernetes Nodes tree view.

Figure 6. Kubernetes Nodes Summary view

The Kubernetes Nodes Summary view displays the following data:

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Resource Entitlement: The resource allocation for the selected Kubernetes node over a selected period of time, which includes the following:
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CPU Allocatable: Shows the current allocatable CPU resources of this node.
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Memory Allocatable: Shows the current allocatable Memory resources of this node.
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CPU Request and Limit: Shows the trend of CPU request, limit, and capacity of this node.
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Memory Request and Limit: Shows the trend of Memory request, limit, and capacity of this node.
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Resource Utilizations: The resource utilization for the selected Kubernetes node over a selected period of time, which includes the following:
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CPU Utilization: shows the percentage of CPU usage divide CPU capacity.
CPU Usage: shows the usage, request, and limit of CPU.
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Memory Utilization: shows the percentage of Memory usage divide Memory capacity.
Memory Usage: shows the usage, request and limit of Memory.
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Total Network I/O: shows the sending, receiving, and transferring rate in byte/s, aggregated from all interfaces.
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Filesystem Utilization: shows the filesystem utilization.
Filesystem Inodes Usage: shows the inodes usage and total inodes.
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Total Disk I/O Load: shows the number of IOs in progress per second, aggregated from all disk devices.
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Total Disk I/O Latency: shows the read and write latency in percentage.
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: The icon indicates this metrics is collected by Prometheus metrics collector.
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Summary: Displays the detailed information about the selected Kubernetes node, including Name, Pod CIDR, OS, Architecture, OS Image, Address, Capacity, Allocatable, and Status.

Click Explore on the upper right of the Kubernetes Nodes Summary view to open the Nodes Explorer view, which shows more detailed information about this Kubernetes node.

Figure 7. Kubernetes Nodes Summary view for VMware

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Explore to VMware VM: Click the button to open the VMware Explorer view, which is the same view from VMware cartridge. The Explore to xx button varies from the cartridge that is monitoring the machines. Currently, the supported cartridges include: VMware, Infrastructure, AWS, and Azure.
Nodes Explorer view

The Nodes Explorer view opens when you click Explore in the Kubernetes Nodes Summary view, which includes the following tabs:

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General tab: The General tab displays the overall information of the selected Kubernetes node over a selected period of time, including the Summary and Resource Information table and the Pods table. For more information, see Node metrics .
Figure 8. Kubernetes Nodes Explorer view General Tab
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Metrics tab: The Metrics tab displays a Metric Selector allowing you to choose the metrics to be plotted on this dashboard. Charts of CPU Usage, Utilization, Memory Usage, and Network I/O are presented by default.
Figure 9. Kubernetes Nodes Explorer view Metrics Tab
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Events tab: The Events tab lists all the events occur on the nodes.
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Name: name of the event.
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Type: type of the event, Warning or Normal.
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Namespace: namespace of where this event happens.
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Kind: type of the Kubernetes component on which this event occurs.
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Involved Object: name of the Kubernetes component on which this event occurs.
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Source: where this event has been triggered from.
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Reason: reason of this event.
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Message: detailed message of this event.
Figure 10. Kubernetes Nodes Explorer view Events tab

Monitoring Kubernetes Workloads

Kubernetes workload is a group of Kubernetes resources. It includes the following Kubernetes resources types: deployment, daemon set, stateful set, replica set, replication controller, cron job, job, and pod. The Kubernetes Workloads Quick View, which appears after clicking Monitoring > Workloads, shows the data collected about the selected clusters and namespaces. This view consists of the following two panes:

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The Kubernetes Workloads tree view, which appears on the left of Kubernetes Workloads Quick View, lists the workloads existing in the monitored Kubernetes environment. The menu level differs from different workload types, following are some examples of the menu levels:
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Cluster -> Namespace -> Deployment -> Replica Set -> Pod
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Cluster -> Namespace -> Cron Job -> Job -> Pod
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Cluster -> Namespace -> Daemon Set -> Job -> Pod
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Cluster -> Namespace -> Stateful Set -> Pod
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The Kubernetes Pods Summary view, which appears on the right after you select an individual pod in the Kubernetes Workloads tree view.

Kubernetes Workloads Summary view

The Kubernetes Workloads Summary view appears on the right when you select a workload in the Kubernetes Workloads tree view.

Figure 11. Kubernetes Workloads Summary view

The Kubernetes Workloads Summary view displays the following data:

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NOTE: If the selected workload type is a Pod, the metrics values are from the Pod. If the selected workload type is other than a Pod, then the metrics values are the aggregated values from all the related pods of the current workload (e.g. Deployment, Daemon Set, and so on).
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Resource Utilizations: The resource utilization for the selected Kubernetes Workloads over a selected period of time, which includes the following:
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CPU Utilization: The CPU utilization is calculated as the percentage of CPU usage rate and limit, and it will be unset or blank if the CPU limit is not configured.
CPU Usage: A comparison of per-second usage, request, and limit.
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Memory Utilization: The Memory utilization is calculated as the percentage of memory usage and limit, and it will be unset or blank if the memory limit is not configured.
Memory Usage: A comparison of usage, request, and limit.
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Total Network I/O (Bytes Rate): transferring, sending, and receiving rate in bytes.
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Filesystem Utilization: temporary filesystem utilization.
Filesystem Usage: temporary filesystem reading or writing rate in bytes.
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Summary: Displays the detailed information about the selected Kubernetes workload. The listed information might vary from different types of workload.
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Alarms: Displays the alarms aggregated from the pod and the current workload related to the pod.

Click Explore on the upper right of the Kubernetes Workloads Summary view to open the Workloads Explorer view, which shows more detailed information about this Kubernetes workload.

Workloads Explorer view

The Workloads Explorer view opens when you click Explore in the Kubernetes Workloads Summary view, which includes the following tabs:

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Metrics tab: The Metrics tab displays a Metric Selector allowing you to choose the metrics to be plotted on this dashboard. Charts of Utilization, CPU Usage and Quota, Memory Usage and Quota, Total Network I/O, Total Filesystem Usage, and Filesystem Utilization by Device are presented by default.
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NOTE: If the current workload is a Pod, then the metrics values are from the Pod. Otherwise, the metrics values come from aggregated values of the related pods of this workload (e.g. Deployment, Daemon Set).
Figure 12. Kubernetes Workloads Explorer view Metrics Tab
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Events tab: The Event tab lists all the events occur on the workloads. It will not aggregate the alarms from other related workloads.
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Name: name of the event.
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Type: type of the event, Warning or Normal.
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Namespace: namespace of where this event happens.
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Involved Object: name of the Kubernetes component on which this event occurs.
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Source: where this event has been triggered from.
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Reason: reason of this event.
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Message: detailed message of this event.
Figure 13. Kubernetes Workloads Explorer view Events tab
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Configuration tab: The Configuration tab displays the overall information of the selected Kubernetes Workload over a selected period of time. It includes the following tables:
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Summary: Summary information of this workload.
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Pod Configuration: Pod related configuration. If the current workload is a pod, it displays the configuration of the pod. Otherwise, it displays the pod template information of the current workload to create related pods.
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Container Configuration: Including containers configurations and Init-containers configurations. If the current workload is a pod, it displays the configuration of the pod containers. Otherwise, it displays the container template of the pod containers created by this workload.
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Click to see detailed information on this item.
Figure 14. Kubernetes Workloads Explorer view Configuration Tab
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Pods tab: The Pods tab displays the related Pods of the workload. This tab is not displayed if the workload type is a Pod.
Click the Pod name or the button will navigate to the related Pod explorer view.
Figure 15. Kubernetes Workloads Explorer view Pods Tab
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Containers tab: The Containers tab displays the related created by this pod. This tab is displayed only when the workload type is a Pod.
Click the Container name or the button will navigate to the Container Dashboard.
Figure 16. Kubernetes Workloads Explorer view Containers Tab
Container Dashboard
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Metrics tab on Container Dashboard
The Metrics tab displays a Metric Selector allowing you to choose the metrics to be plotted on this dashboard. Charts of Utilization, CPU Usage and Quota, and Memory Usage and Quota are presented by default.
Figure 17. Metrics tab on Container Dashboard
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Configurations tab on Container Dashboard
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Summary: summary information of this container.
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Resources: resource request and limit configured for this container.
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Volume Devices and Mounts: volumes mounted by this container.
Figure 18. Configurations tab on Container Dashboard

Monitoring Kubernetes Pods

A pod contains one or multiple containers, such as Docker containers, which contains storage/network and the specification about how to run the containers. The Kubernetes Pods Quick View, which appears after clicking Monitoring > Pods, shows the data collected about the selected clusters and namespaces. This view consists of the following two panes:

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The Kubernetes Pods tree view, which appears on the left of Kubernetes Pods Quick View, lists the pods existing in the monitored Kubernetes environment.
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The Kubernetes Pods Summary view, which appears on the right after you select an individual pod in the Kubernetes Pods tree view.
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