Metrics in Kubernetes: Difference between revisions
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Aside from [[#Resource_Metric|resource metrics]], there are two other types of metrics, both of which are considered [[#Custom_Metric|custom metrics]]: [[#Pod_Metric|pod metrics]] and [[#Object_Metrics|object metrics]]. | Aside from [[#Resource_Metric|resource metrics]], there are two other types of metrics, both of which are considered [[#Custom_Metric|custom metrics]]: [[#Pod_Metric|pod metrics]] and [[#Object_Metrics|object metrics]]. | ||
===<span id='Pod_Metric'></span>Pod Metrics=== | ===<span id='Pod_Metric'></span>Pod Metrics=== | ||
These resource describe pods. | |||
===<span id='Object_Metric'></span>Object Metrics=== | ===<span id='Object_Metric'></span>Object Metrics=== | ||
Revision as of 20:09, 5 October 2020
Internal
Overview
Resource
Metrics
Resource Metrics
A resource metric is a numeric quantity that tracks the value of a resource specified by a Kubernetes API resource. By default, the only two supported resource metrics are the CPU utilization of a container and the memory consumed by a container. These resources do not change names from cluster to cluster and they should be available as long the Resource Metrics API is available.
Custom Metrics
Aside from resource metrics, there are two other types of metrics, both of which are considered custom metrics: pod metrics and object metrics.
Pod Metrics
These resource describe pods.
Object Metrics
Kubernetes Metrics Server
Resource Metrics API
metrics.k8s.io
TODO:
- https://github.com/kubernetes/community/blob/master/contributors/design-proposals/instrumentation/resource-metrics-api.md
- https://github.com/kubernetes/community/blob/master/contributors/design-proposals/instrumentation/custom-metrics-api.md
Notes
- More details about resource metrics API.
- Metrics: raw values, utilization values.
- Metric server: https://kubernetes.io/docs/tasks/debug-application-cluster/resource-metrics-pipeline/, https://github.com/kubernetes-sigs/metrics-server
- Custom metrics API: https://github.com/kubernetes/community/blob/master/contributors/design-proposals/instrumentation/custom-metrics-api.md
- External metrics API: https://github.com/kubernetes/community/blob/master/contributors/design-proposals/instrumentation/external-metrics-api.md