k8s之监控集群资源利用率

2023-09-17 03:35| 来源: 网络整理| 查看: 265

1、集群整体状态 kubectl cluster-info 2、更多集群信息 kubectl cluster-info dump 3、查看资源信息 kubectl describe 4、实时查看资源信息 kubectl get pod --watch 一、Metrics Server介绍

Metrics Server是一个集群范围的资源使用情况的数据聚合器。作为一个应用部署在集群中。Metric server从每个节点上KubeletAPI收集指标，通过Kubernetes聚合器注册在Master APIServer中。

1、工作原理

2、Metrics Server部署 ①项目地址 https://github.com/kubernetes-sigs/metrics-server ②下载Yaml文件 wget https://github.com/kubernetes-sigs/metrics-server/releases/download/v0.3.7/components.yaml ③修改Yaml文件复制代码

containers: - name: metrics-server image: lizhenliang/metrics-server-amd64:v0.3.1 #修改成国内镜像，这里使用lizhenliang已有的镜像 imagePullPolicy: IfNotPresent args: - --cert-dir=/tmp - --secure-port=4443 - --kubelet-insecure-tls #跳过tls检查 - --kubelet-preferred-address-types=InternalIP #以node ip连接kubelet 复制代码

④部署Metrics kubectl apply -f components.yaml #yaml文件应用，可以在任何路径下面应用

验证是否部署成功

[root@k8s-master k8s]# kubectl get pods -n kube-system NAME READY STATUS RESTARTS AGE calico-kube-controllers-676c4cbdf-f9m8w 1/1 Running 0 3d23h calico-node-5wfdf 1/1 Running 0 3d23h calico-node-xzrwc 1/1 Running 0 3d23h coredns-7ff77c879f-c77qj 1/1 Running 0 3d23h coredns-7ff77c879f-tjws5 1/1 Running 0 3d23h etcd-k8s-master 1/1 Running 0 3d23h kube-apiserver-k8s-master 1/1 Running 0 3d23h kube-controller-manager-k8s-master 1/1 Running 0 3d23h kube-proxy-jmqnj 1/1 Running 0 3d23h kube-proxy-vnzhk 1/1 Running 0 3d23h kube-scheduler-k8s-master 1/1 Running 0 3d23h metrics-server-8fcfb55ff-j8vmz 1/1 Running 1 2m #状态已经Running 复制代码

⑤监控集群资源利用率

查看Metrics是否注册到APIsevice中

[root@k8s-master k8s]# kubectl get apiservice NAME SERVICE AVAILABLE AGE v1. Local True 4d19h v1.admissionregistration.k8s.io Local True 4d19h v1.apiextensions.k8s.io Local True 4d19h v1.apps Local True 4d19h v1.authentication.k8s.io Local True 4d19h v1.authorization.k8s.io Local True 4d19h v1.autoscaling Local True 4d19h v1.batch Local True 4d19h v1.coordination.k8s.io Local True 4d19h v1.crd.projectcalico.org Local True 9m2s v1.networking.k8s.io Local True 4d19h v1.rbac.authorization.k8s.io Local True 4d19h v1.scheduling.k8s.io Local True 4d19h v1.storage.k8s.io Local True 4d19h v1beta1.admissionregistration.k8s.io Local True 4d19h v1beta1.apiextensions.k8s.io Local True 4d19h v1beta1.authentication.k8s.io Local True 4d19h v1beta1.authorization.k8s.io Local True 4d19h v1beta1.batch Local True 4d19h v1beta1.certificates.k8s.io Local True 4d19h v1beta1.coordination.k8s.io Local True 4d19h v1beta1.discovery.k8s.io Local True 4d19h v1beta1.events.k8s.io Local True 4d19h v1beta1.extensions Local True 4d19h v1beta1.metrics.k8s.io kube-system/metrics-server True 53s v1beta1.networking.k8s.io Local True 4d19h v1beta1.node.k8s.io Local True 4d19h v1beta1.policy Local True 4d19h v1beta1.rbac.authorization.k8s.io Local True 4d19h v1beta1.scheduling.k8s.io Local True 4d19h v1beta1.storage.k8s.io Local True 4d19h v2beta1.autoscaling Local True 4d19h v2beta2.autoscaling Local True 4d19h 复制代码

查看节点资源使用率

[root@k8s-master k8s]# kubectl top node NAME CPU(cores) CPU% MEMORY(bytes) MEMORY% k8s-master 211m 21% 977Mi 33% k8s-node1 87m 8% 398Mi 13%

查看Pod资源使用率，未排序

[root@k8s-master k8s]# kubectl top pod -A NAMESPACE NAME CPU(cores) MEMORY(bytes) kube-system calico-kube-controllers-676c4cbdf-f9m8w 1m 13Mi kube-system calico-node-5wfdf 25m 76Mi kube-system calico-node-xzrwc 23m 85Mi kube-system coredns-7ff77c879f-c77qj 3m 11Mi kube-system coredns-7ff77c879f-tjws5 3m 11Mi kube-system etcd-k8s-master 17m 52Mi kube-system kube-apiserver-k8s-master 36m 439Mi kube-system kube-controller-manager-k8s-master 12m 41Mi kube-system kube-proxy-7v26z 1m 17Mi kube-system kube-proxy-nxlrh 1m 16Mi kube-system kube-scheduler-k8s-master 4m 16Mi kube-system metrics-server-6767f6d894-jsbff 1m 14Mi kubernetes-dashboard dashboard-metrics-scraper-6b4884c9d5-rdgz8 1m 7Mi kubernetes-dashboard kubernetes-dashboard-7b544877d5-5thm9 1m 14Mi 复制代码

查看Pod资源使用率，并按照内存大小进行排序（cpu列说明：1000m=1c，即1000m代表1个cpu逻辑核，当cpu值显示大于100m时，建议留意下）

[root@k8s-master metrics-server]# kubectl top pod -A --sort-by=memory NAMESPACE NAME CPU(cores) MEMORY(bytes) kube-system kube-apiserver-k8s-master 57m 365Mi kube-system etcd-k8s-master 27m 217Mi kube-system kube-controller-manager-k8s-master 24m 58Mi kube-system calico-node-m4nq6 42m 40Mi kube-system calico-node-679b4 40m 26Mi kube-system calico-node-ghght 51m 23Mi kubernetes-dashboard kubernetes-dashboard-7f99b75bf4-phgc5 1m 22Mi kube-system kube-scheduler-k8s-master 7m 20Mi kube-system kube-proxy-trgz8 1m 14Mi kube-system calico-kube-controllers-65f8bc95db-qxcwb 3m 14Mi kube-system metrics-server-5667498b7d-9sst9 2m 13Mi kube-system coredns-7ff77c879f-2wqw5 4m 8Mi kube-system kube-proxy-rxdn5 1m 8Mi kube-system kube-proxy-t55wt 1m 8Mi kube-system coredns-7ff77c879f-4kk6t 4m 7Mi kubernetes-dashboard dashboard-metrics-scraper-6b4884c9d5-dp7wh 1m 5Mi default nginx-f89759699-k5rmn 0m 1Mi cka aliang-666-74689c47f4-vwjr6 0m 1Mi default nginx-deploy 0m 1Mi default aliang-666 0m 1Mi 复制代码

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