The metrics-server component is used to collect monitoring metrics. You can use metrics-server to collect monitoring metrics from your cluster. This topic introduces metrics-server, and describes the usage notes and release notes for metrics-server.

Introduction

The metrics-server component is a monitoring tool that Container Service for Kubernetes (ACK) develops based on open source Metrics Server. You can use metrics-server to collect monitoring metrics from your cluster, monitor basic resources that are used in your cluster, and configure Horizontal Pod Autoscaler (HPA) to work based on the collected metrics. You can call the Metrics API to retrieve monitoring metrics.

For more information about open source Metrics Server, see Kubernetes Metrics Server.

Usage notes

You can use metrics-server to collect monitoring metrics about the basic resources that are used by the pods in your cluster. For more information, see Monitor basic resources.

Release notes

March 2023

VersionImage addressRelease dateDescriptionImpact
v0.3.9.3-ff225cd-aliyunregistry.{REGION}.aliyuncs.com/acs/metrics-server:v0.3.9.3-ff225cd-aliyunMarch 2023The issue that metrics are not collected from virtual nodes in ACK edge clusters is fixed. No impact on workloads
v0.3.9.3-628a248-aliyunregistry.{REGION}.aliyuncs.com/acs/metrics-server:v0.3.9.3-628a248-aliyunFebruary 2023The issue that CPU metrics spike when the collection of monitoring data is interrupted is fixed. No impact on workloads

July 2022

VersionImage addressRelease dateDescriptionImpact
v0.3.9-d554015-aliyunregistry.{REGION}.aliyuncs.com/acs/metrics-server:v0.3.9-d554015-aliyunJuly 2022
  • Vulnerabilities in the component image are patched.
  • This image version is compatible with ACK clusters that run Kubernetes 1.22.
No impact on workloads

May 2022

VersionImage addressRelease dateDescriptionImpact
v0.3.8.7-307cf45-aliyunregistry.{REGION}.aliyuncs.com/acs/metrics-server:v0.3.8.5-307cf45-aliyunMay 2022

This image version is compatible with ACK clusters that run Kubernetes 1.22.

No impact on workloads

February 2022

VersionImage addressRelease dateDescriptionImpact
v0.3.8.6-307cf45-aliyunregistry.{REGION}.aliyuncs.com/acs/metrics-server:v0.3.8.5-307cf45-aliyunFebruary 2022

This version is in canary release.

This image version is compatible with ACK clusters that run Kubernetes 1.22 and earlier.

No impact on workloads

May 2021

VersionImage addressRelease dateDescriptionImpact
v0.3.8.5-307cf45-aliyunregistry.{REGION}.aliyuncs.com/acs/metrics-server:v0.3.8.5-307cf45-aliyunMay 2021
  • This image version is compatible with ACK clusters that run Kubernetes 1.20 and earlier.
  • Monitoring of basic resources used by pods is supported by the latest version of CloudMonitor.
No impact on workloads

April 2021

VersionImage addressRelease dateDescriptionImpact
v0.2.2-b4bf266-aliyunregistry.{REGION}.aliyuncs.com/acs/metrics-server:v0.2.2-b4bf266-aliyunApril 2021
  • Metric collection from Windows nodes and Linux nodes is supported.
  • The following scaling periods are supported: 15 seconds, 20 seconds, 30 seconds, and 60 seconds.
  • The issue that HPA adds excess pods during rolling updates of applications is fixed.
We recommend that you upgrade the component to the latest version.