tencent cloud

Tencent Kubernetes Engine

소식 및 공지 사항
릴리스 노트
제품 릴리스 기록
제품 소개
제품 장점
제품 아키텍처
시나리오
제품 기능
리전 및 가용존
빠른 시작
신규 사용자 가이드
표준 클러스터를 빠르게 생성
Demo
클라우드에서 컨테이너화된 애플리케이션 배포 Check List
TKE 표준 클러스터 가이드
Tencent Kubernetes Engine(TKE)
클러스터 관리
네트워크 관리
스토리지 관리
Worker 노드 소개
Kubernetes Object Management
워크로드
클라우드 네이티브 서비스 가이드
Tencent Managed Service for Prometheus
TKE Serverless 클러스터 가이드
TKE 클러스터 등록 가이드
실습 튜토리얼
Serverless 클러스터
네트워크
로그
모니터링
유지보수
DevOps
탄력적 스케일링
자주 묻는 질문
클러스터
TKE Serverless 클러스터
유지보수
서비스
이미지 레지스트리
원격 터미널
문서Tencent Kubernetes Engine

NodeProblemDetectorPlus Add-on

포커스 모드
폰트 크기
마지막 업데이트 시간: 2024-02-01 10:15:37

Overview

Add-on description

Node-Problem-Detector-Plus is an add-on that monitors the health status of Kubernetes cluster nodes. It runs in the TKE environment as a DaemonSet to help users detect various exceptions on nodes in real time and report the detection results to the upstream Kube-apiserver.

Kubernetes objects deployed in a cluster

Kubernetes Object Name
Type
Resource Amount
Namespaces
node-problem-detector
DaemonSet
0.5C 80M
kube-system
node-problem-detector
ServiceAccount
-
kube-system
node-problem-detector
ClusterRole
-
-
node-problem-detector
ClusterRoleBinding
-
-

Use Cases

Node-Problem-Detector-Plus can be used to monitor the running status of nodes, including kernel deadlocks, OOM, system thread pressure, system file descriptor pressure, and other metrics. It reports such information to the API Server as Node Conditions and Events. You can estimate the resource pressure of nodes by detecting the corresponding metrics and then manually release or scale out node resources before nodes start draining pods. In this way, you can prevent potential losses resulted from Kubernetes resource repossessing or node unavailability.

Limits

To use NPD in your cluster, you need to install this add-on in your cluster. The system resources used by NPD containers is restricted to 0.5 CPU core and 80 MB memory.

Component Permission Description

Permission Description

The permission of this component is the minimal dependency required for the current feature to operate.

Permission Scenarios

Feature
Involved Object
Involved Operation Permission
It is required to report fault information when a node encounters a malfunction and modify its condition.
nodestatus
patch
It is required to send event notifications to the cluster.
event
create/patch/update

Permission Definition

rules:
- apiGroups:
  - ""
  resources:
  - nodes
  verbs:
  - get
- apiGroups:
  - ""
  resources:
  - nodes/status
  verbs:
  - patch
- apiGroups:
  - ""
  resources:
  - events
  verbs:
  - create
  - patch
  - update

Usage

1. Log in to the TKE console and select Cluster in the left sidebar.
2. On the “Cluster Management page, click the ID of the target cluster to go to the cluster details page.
3. In the left sidebar, click Add-on Management to go to the Add-on List page.
4. On the Add-on List page, click Create to go to the Create Add-on page, and select NodeProblemDetectorPlus.
5. Click Complete. After the installation is successful, the corresponding node-problem-detector resources are available in your cluster, and the corresponding conditions will be added to Node Conditions.

Appendix

Node Conditions

After the NPD plug-in is installed, the following specific Conditions will be added to nodes:
Condition
Default Value
Description
ReadonlyFilesystem
False
Indicates whether the file system is read-only.
FDPressure
False
Queries whether the number of file descriptors of the host reaches 80% of the max value.
FrequentKubeletRestart
False
Indicates whether Kubelet has restarted more than 5 times in 20 minutes.
CorruptDockerOverlay2
False
Indicates whether the DockerImage is faulty.
KubeletProblem
False
Indicates whether the Kubelet service is Running.
KernelDeadlock
False
Indicates whether a deadlock exists in the kernel.
FrequentDockerRestart
False
Indicates whether Docker has restarted more than 5 times in 20 minutes.
FrequentContainerdRestart
False
Indicates whether Containerd has restarted more than 5 times in 20 minutes.
DockerdProblem
False
Indicates whether the Docker service is Running (if the node runtime is Containerd, the value is always False).
ContainerdProblem
False
Indicates whether the Containerd service is Running (if the node runtime is Docker, the value is always False).
ThreadPressure
False
Indicates whether the current number of threads of the system reaches 90% of the max value.
NetworkUnavailable
False
Indicates whether the NTP service status is Running.
SerfFailed
False
Detects the node network health status in distributed mode.
다음 주제: TKE Serverless 클러스터 업데이트(2023년)

도움말 및 지원

문제 해결에 도움이 되었나요?

피드백