Cluster page in the Kubernetes view
The Cluster page is designed to provide capacity management insights for the Kubernetes cluster. Each page contains additional tabs, each of which presents capacity and efficiency KPIs related to the resources relevant for the analyzed entity. By default, some columns are hidden. You can show or hide columns using the action menu
that is located next to the table title.
Capacity
The Capacity tab is designed to provide a summary of the most important KPIs for managing capacity of Kubernetes clusters.
Column | Description | Statistics | Metrics |
|---|---|---|---|
Cluster | Name of the cluster. Clicking on one of the clusters in this column takes you to the Cluster Details page in the Kubernetes view. | Not Applicable |
|
Pod # | Number of pods in the cluster. | Last Value | KPOD_NUM |
Max Pods # | Maximum number of pods that can be created in the cluster. | Last Value | KPOD_NUM_MAX |
Spare Pods | Estimated number of residual capacity in terms of additional pods that can be scheduled. This considers the average size of existing pods in the cluster. | 95th percentile of the performance metrics; Average of KPOD_NUM | CPU_UTIL, CPU_REQUEST_UTIL, MEM_REAL_UTIL, MEM_REQUEST_CAPACITY, KPOD_NUM, KPOD_NUM_MAX |
Days To Saturation | Estimated number of days before one of the resources (CPU, Memory, or Storage) of the cluster breaches the configured warning threshold. If the resource usage has already exceeded thresholds, it displays Saturated. | Average of the hourly time series values is used for the estimation calculation | IND_DAYS_TO_SATURATION |
CPU# | Number of CPU cores currently configured for the Cluster. | Last Value | CPU_NUM |
CPU Request [cores] | Requested CPU cores for the cluster. It is the sum of the CPU request of the containers running in this cluster. CPU request of a container is the amount of CPU that the system will guarantee for a container. | Last Value | CPU_REQUEST |
CPU Limit [cores] | CPU Limit of the cluster. It is the sum of the CPU limit of the containers running in this cluster. CPU limit of a container is the maximum amount of CPU that the container is allowed to use. | Last Value | CPU_LIMIT |
CPU Used [cores] | Total CPU used by the cluster expressed in cores. | 95th percentile | CPU_USED_NUM |
CPU Used vs Capacity [%] | Percentage of CPUs actually used with respect to CPU capacity (number of CPUs). | 95th percentile | CPU_UTIL |
CPU Request vs Capacity [%] | Percentage of CPUs requested with respect to CPU capacity (number of CPUs). | 95th percentile | CPU_REQUEST_CAPACITY |
CPU Used vs Limit [%] | Percentage of CPU used with respect to CPU limit. | 95th percentile | CPU_UTIL_LIMIT |
CPU Limit vs Capacity [%] | Percentage of CPU limit with respect to CPU capacity (number of CPUs). | 95th percentile | CPU_LIMIT,CPU_NUM |
Memory [GB] | Total memory configured for the cluster. | Last Value | TOTAL_REAL_MEM |
Mem Limit [GB] | Memory Limit of the cluster. It is the sum of the memory limit of the containers running in this cluster. The memory limit of a container is the maximum amount of memory that the container is allowed to use. | Last Value | MEM_KLIMIT |
Mem Request [GB] | Requested memory for the cluster. It is the sum of the memory request of the containers running in this cluster. The memory request of a container is the amount of memory that the system will guarantee for a container. | Last Value | MEM_REQUEST |
Mem Used [GB] | Total memory used by the cluster. | 95th percentile | MEM_USED |
Mem Real Used [GB] | Real memory used by the cluster. | 95th percentile | MEM_REAL_USED |
Mem Used vs Capacity [%] | Percentage of memory actually used with respect to memory capacity (total memory). | 95th percentile | MEM_UTIL |
Mem Real Used vs Capacity [%] | Percentage of real memory used with respect to memory capacity (total memory). | 95th percentile | MEM_REAL_UTIL |
Mem Request vs Capacity [%] | Percentage of memory requested with respect to memory capacity (total memory). | 95th percentile | MEM_REQUEST_CAPACITY |
Mem Real Used vs Limit [%] | Percentage of real memory used with respect to memory limit. | 95th percentile | MEM_REAL_UTIL_LIMIT
|
Mem Limit vs Capacity [%] | Percentage of memory limit with respect to memory capacity (total memory). | 95th percentile | MEM_KLIMIT,TOTAL_REAL_MEM |
File System Size [GB] | Total file system configured for the cluster. | Last Value | TOTAL_FS_SIZE |
File System Util [%] | Percentage of file system actually used with respect to file system capacity (total file system). | 95th percentile | TOTAL_FS_UTIL |
Pod # vs Pod Max [%] | Percentage of pod with respect to the maximum number of pods configured for this cluster. | Last Value | KPOD_NUM, KPOD_NUM_MAX |
Bottleneck Resource | Name of the resource that has either saturated or will saturate in the next 90 days. Bottleneck resource can be CPU, Memory, or Storage. | Based on IND_DAYS_TO_SATURATION | IND_BNECK_RESOURCE |
CPU
The CPU tab presents the most important metrics related to the CPU.
Column name | Meaning | Statistics | Metrics |
|---|---|---|---|
Cluster | Name of the cluster. Clicking on one of the clusters in this column takes you to the Cluster Details page in the Kubernetes view. | Not applicable |
|
Days To Saturation | Estimated number of days when the CPU is predicted to breach the configured warning threshold. | Average of the hourly time series values is used for the estimation calculation | IND_DAYS_TO_SATURATION |
CPU # | Number of CPU cores currently configured for the cluster. | Last Value | CPU_NUM |
CPU Used [cores] | Total CPU used by the cluster expressed in cores. | 95th percentile | CPU_USED_NUM |
CPU Request [cores] | Requested CPU cores for the cluster. It is the sum of the CPU request of the containers running in this cluster. CPU request of a container is the amount of CPU that the system will guarantee for a container. | Last Value | CPU_REQUEST |
CPU Limit [cores] | CPU Limit of the cluster. It is the sum of the CPU limit of the containers running in this cluster. CPU limit of a container is the maximum amount of CPU that the container is allowed to use. | Last Value | CPU_LIMIT |
CPU Used vs Request [%] | Percentage of CPU used with respect to the CPU request. | 95th percentile | CPU_UTIL_REQUEST |
CPU Used vs Capacity [%] | Percentage of CPUs actually used with respect to CPU capacity (number of CPUs). | 95th percentile | CPU_UTIL |
CPU Request vs Capacity [%] | Percentage of CPUs requested with respect to CPU capacity (number of CPUs). | 95th percentile | CPU_REQUEST,CPU_NUM |
CPU Used vs Limit [%] | Percentage of CPU used with respect to the CPU limit. | 95th percentile | CPU_UTIL_LIMIT |
CPU Limit vs Capacity [%] | Percentage of CPU limit with respect to CPU capacity (number of CPUs). | 95th percentile | CPU_LIMIT,CPU_NUM |
CPU Oversubscription [%] | Percentage of CPU limit with respect to the CPU capacity (number of CPUs). | 95th percentile | CPU_LIMIT,CPU_NUM |
Memory
The Memory tabs presents the key metrics related to the memory.
Column name | Meaning | Statistics | Metrics |
|---|---|---|---|
Cluster | Name of the cluster. Clicking on one of the clusters in this column takes you to the Cluster Details page in the Kubernetes view. | Not applicable |
|
Days To Saturation | Estimated number of days when the Memory is predicted to breach the configured warning threshold. | Average of the hourly time series values is used for the estimation calculation | IND_DAYS_TO_SATURATION |
Memory [GB] | Total memory configured for the cluster. | Last Value | TOTAL_REAL_MEM |
Mem Used [GB] | Memory used by the cluster. | 95th percentile | MEM_USED |
Mem Real Used [GB] | Real memory used by the cluster excluding buffer cache and slab memory. | 95th percentile | MEM_REAL_USED |
Mem Request [GB] | Requested memory for the cluster. It is the sum of the memory request of the containers running in this cluster. The memory request of a container is the amount of memory that the system will guarantee for a container. | Last Value | MEM_REQUEST |
Mem Limit [GB] | Memory Limit of the cluster. It is the sum of the memory limit of the containers running in this cluster. The memory limit of a container is the maximum amount of memory that the container is allowed to use. | Last Value | MEM_KLIMIT |
Mem Used vs Request [%] | Percentage of memory used with respect to memory request. | 95th percentile | MEM_UTIL_REQUEST |
Mem Real Used vs Request [%] | Percentage of real memory used with respect to memory capacity (total memory). | 95th percentile | MEM_REAL_UTIL_REQUEST |
Mem Used vs Capacity [%] | Percentage of memory used with respect to memory capacity (total memory). | 95th percentile | MEM_UTIL |
Mem Request vs Capacity [%] | Percentage of memory request with respect to memory capacity (total memory). | 95th percentile | MEM_REQUEST,TOTAL_REAL_MEM |
Mem Real Used vs Limit [%] | Percentage of real memory used with respect to memory limit. | 95th percentile | MEM_REAL_UTIL_LIMIT |
Mem Limit vs Capacity [%] | Percentage of memory limit with respect to memory capacity (total memory). | 95th percentile | MEM_KLIMIT,TOTAL_REAL_MEM |
Mem Oversubscription [%] | Percentage of memory limit with respect to memory capacity (total memory). | 95th percentile | MEM_KLIMIT,TOTAL_REAL_MEM |
Storage
The Storage tabs presents the key metrics related to the storage.
Since in Kubernetes the persistent volumes can be requested only from the cluster, the cluster tab is the only one with this subsection. Since the persistent volume management is still at the early stages of the developments by Kubernetes, the only relevant information available up to now are the following.
Column name | Meaning | Statistics | Metrics |
|---|---|---|---|
Cluster | Name of the cluster. Clicking on one of the clusters in this column takes you to the Cluster Details page in the Kubernetes view. | Not applicable |
|
Number of PV | Number of persistent volumes. | Last Value | Count of the number of PV entities |
PV Capacity [GB] | Storage capacity aggregated across all of the configured persistent volumes. | Last Value | SUM of ST_SIZE of PV associated with the cluster |
PV Allocated [GB] | Storage allocated space aggregated across all of the configured persistent volumes. | Last Value | SUM of ST_ALLOCATED of PV associated with the cluster |
PV Free [GB] | Storage free space aggregated across all of the configured persistent volumes. | Last Value | SUM of ST_SIZE - SUM of ST_ALLOCATED of PV associated with the cluster |
PV Allocated vs Capacity [%] | Percentage of storage allocated with respect to capacity. | Last Value | AVG of ST_SIZE / ST_ALLOCATED of PV associated with the cluster |
Detailed information about a specific cluster
After you click on the cluster in the Cluster column, the Cluster Details page is displayed. You can use the sorting and filtering options on the page to find a specific cluster.
Section or Panel | Description |
|---|---|
General details section | General details, such as cluster name and type are displayed. The type is Kubernetes - Cluster. |
Related Information panel | Clicking the links in the Related Information panel displays the other information such as nodes of the cluster and image analysis. |
Summary tab | A quick graphical summary of the CPU, memory, and storage utilization, and pod number of the cluster. Core metrics for the selected entity are displayed as analysis charts, depending on available data. |
Configuration Details tab | The configuration matrix for the selected cluster. |
