kubernetes 性能与监控

it2023-07-22  74

kubernetes 性能与监控

部署metrics-server

开启apiserver聚合服务
[root@master ~]# vim /etc/kubernetes/manifests/kube-apiserver.yaml # spec.containers.command 最下面手动添加如下一行 - --enable-aggregator-routing=true [root@master ~]# systemctl restart kubelet [root@master ~]# kubectl -n kube-system get pod kube-apiserver-master -o yaml |grep enable-aggregator-routing - --enable-aggregator-routing=true
证书的申请与签发

要在所有节点执行(master,node-0001,node-0002,node-0003)

申请的多余证书可以使用 (kubectl delete certificatesigningrequests 证书名称) 删除

[root@node-0001 ~]# vim /var/lib/kubelet/config.yaml # 在文件的最后一行添加 serverTLSBootstrap: true [root@node-0001 ~]# systemctl restart kubelet #-------------------------签发证书必须在 master 上执行 ------------------------------------ [root@master ~]# kubectl get certificatesigningrequests NAME AGE REQUESTOR CONDITION csr-wsfz7 8s system:node:master Pending [root@master ~]# kubectl certificate approve csr-wsfz7 [root@master ~]# kubectl get certificatesigningrequests NAME AGE REQUESTOR CONDITION csr-wsfz7 86s system:node:master Approved,Issued
安装mertics插件

拷贝 云盘的kubernetes/v1.17.6/mertics 目录到 master 上

[root@master metrics]# docker load -i metrisc-server.tar.gz [root@master metrics]# docker tag gcr.io/k8s-staging-metrics-server/metrics-server:master 192.168.1.100:5000/metrics-server:master [root@master metrics]# docker push 192.168.1.100:5000/metrics-server:master [root@master metrics]# vim deployment.yaml 29: image: 192.168.1.100:5000/metrics-server:master [root@master metrics]# kubectl apply -f rbac.yaml [root@master metrics]# kubectl apply -f pdb.yaml [root@master metrics]# kubectl apply -f deployment.yaml [root@master metrics]# kubectl apply -f service.yaml [root@master metrics]# kubectl apply -f apiservice.yaml #-------------------------------- 查询验证 ---------------------------------------------- [root@master metrics]# kubectl -n kube-system get pod NAME READY STATUS RESTARTS AGE metrics-server-78dfb54777-4dcjl 1/1 Running 0 116s [root@master metrics]# kubectl -n kube-system get apiservices NAME SERVICE AVAILABLE AGE v1beta1.metrics.k8s.io kube-system/metrics-server True 2m20s [root@master metrics]# kubectl top node NAME CPU(cores) CPU% MEMORY(bytes) MEMORY% master 95m 4% 840Mi 48% node-0001 24m 1% 266Mi 15% node-0002 24m 1% 270Mi 15% node-0003 26m 1% 280Mi 16%

部署Dashboard

拷贝 云盘的kubernetes/v1.17.6/dashboard 目录到 master 上

上传镜像到私有仓库
# 上传 dashboard 镜像 [root@master dashboard]# docker load -i dashboard.tar.gz [root@master dashboard]# docker tag kubernetesui/dashboard:v2.0.0 192.168.1.100:5000/dashboard:v2.0.0 [root@master dashboard]# docker push 192.168.1.100:5000/dashboard:v2.0.0 # 上传 metrics-scraper 镜像 [root@master dashboard]# docker load -i metrics-scraper.tar.gz [root@master dashboard]# docker tag kubernetesui/metrics-scraper:v1.0.4 192.168.1.100:5000/metrics-scraper:v1.0.4 [root@master dashboard]# docker push 192.168.1.100:5000/metrics-scraper:v1.0.4
安装dashboard
[root@master dashboard]# vim recommended.yaml # 43 行新添加 nodePort: 30090 # 46 行新添加 type: NodePort # 191 行修改为 image: 192.168.1.100:5000/dashboard:v2.0.0 # 275 行修改为 image: 192.168.1.100:5000/metrics-scraper:v1.0.4 [root@master dashboard]# kubectl apply -f recommended.yaml # ---------------------------------- 查询验证 -------------------------------------- [root@master dashboard]# kubectl -n kubernetes-dashboard get pod NAME READY STATUS RESTARTS AGE dashboard-metrics-scraper-57bf85fcc9-vsz74 1/1 Running 0 52s kubernetes-dashboard-7b7f78bcf9-5k8vq 1/1 Running 0 52s [root@master dashboard]# kubectl -n kubernetes-dashboard get service NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) dashboard-metrics-scraper ClusterIP 10.254.76.85 <none> 8000/TCP kubernetes-dashboard NodePort 10.254.211.125 <none> 443:30090/TCP

在华为云上为 node 节点绑定弹性公网IP [ https://弹性公网IP:30090/ ]

token认证登录
[root@master dashboard]# kubectl apply -f admin-token.yaml [root@master ~]# kubectl -n kubernetes-dashboard get secrets NAME TYPE DATA AGE admin-user-token-bxjlz kubernetes.io/service-account-token 3 23s [root@master ~]# kubectl -n kubernetes-dashboard describe secrets admin-user-token-bxjlz Name: admin-user-token-bxjlz ... ... ca.crt: 1025 bytes namespace: 20 bytes token: 这里这个很长的字符串就是你要找的认证 token

使用获取的 token 登录,通过 web 页面访问即可

部署Prometheus

导入镜像

kubernetes/v1.17.6/prometheus/images/ 下所有镜像导入到私有仓库

拷贝所有镜像到 master 的 images 目录下

[root@master images]# for i in *.gz;do docker load -i ${i};done [root@master images]# img="prom/node-exporter v1.0.0 quay.io/coreos/prometheus-config-reloader v0.35.1 quay.io/coreos/prometheus-operator v0.35.1 quay.io/coreos/kube-state-metrics v1.9.2 grafana/grafana 6.4.3 jimmidyson/configmap-reload v0.3.0 quay.io/prometheus/prometheus v2.11.0 quay.io/prometheus/alertmanager v0.18.0 quay.io/coreos/k8s-prometheus-adapter-amd64 v0.5.0 quay.io/coreos/kube-rbac-proxy v0.4.1" [root@master images]# while read _f _v;do docker tag ${_f}:${_v} 192.168.1.100:5000/${_f##*/}:${_v} docker push 192.168.1.100:5000/${_f##*/}:${_v} docker rmi ${_f}:${_v} done <<<"${img}" [root@master images]# curl http://192.168.1.100:5000/v2/_catalog {"repositories":["alertmanager","configmap-reload","coredns","dashboard","etcd","flannel","grafana","k8s-prometheus-adapter-amd64","kube-apiserver","kube-controller-manager","kube-proxy","kube-rbac-proxy","kube-scheduler","kube-state-metrics","metrics-scraper","metrics-server","myos","nginx-ingress-controller","node-exporter","pause","prometheus","prometheus-config-reloader","prometheus-operator"]}
operator安装

拷贝prometheus/setup 目录到 master 下

[root@master prometheus]# curl http://192.168.1.100:5000/v2/configmap-reload/tags/list {"name":"configmap-reload","tags":["v0.3.0"]} [root@master prometheus]# curl http://192.168.1.100:5000/v2/prometheus-config-reloader/tags/list {"name":"prometheus-config-reloader","tags":["v0.35.1"]} [root@master prometheus]# curl http://192.168.1.100:5000/v2/prometheus-operator/tags/list {"name":"prometheus-operator","tags":["v0.35.1"]} [root@master prometheus]# vim setup/prometheus-operator-deployment.yaml 27: - --config-reloader-image=192.168.1.100:5000/configmap-reload:v0.3.0 28: - --prometheus-config-reloader=192.168.1.100:5000/prometheus-config-reloader:v0.35.1 29: image: 192.168.1.100:5000/prometheus-operator:v0.35.1 # 验证安装 [root@master prometheus]# kubectl apply -f setup/ [root@master prometheus]# kubectl -n monitoring get pod NAME READY STATUS RESTARTS AGE prometheus-operator-75b4b59b74-72qhg 1/1 Running 0 47s
prom-adapter安装

拷贝 prometheus/prom-adapter 目录到 master 下

[root@master prometheus]# curl http://192.168.1.100:5000/v2/k8s-prometheus-adapter-amd64/tags/list {"name":"k8s-prometheus-adapter-amd64","tags":["v0.5.0"]} [root@master prometheus]# vim prom-adapter/prometheus-adapter-deployment.yaml 28: image: 192.168.1.100:5000/k8s-prometheus-adapter-amd64:v0.5.0 [root@master prometheus]# kubectl apply -f prom-adapter/ [root@master prometheus]# kubectl -n monitoring get pod NAME READY STATUS RESTARTS AGE prometheus-adapter-856854f9f6-knqtq 1/1 Running 0 6s
metrics-state安装

拷贝 prometheus/metrics-state 目录到 master 下

[root@master prometheus]# curl http://192.168.1.100:5000/v2/kube-state-metrics/tags/list {"name":"kube-state-metrics","tags":["v1.9.2"]} [root@master prometheus]# curl http://192.168.1.100:5000/v2/kube-rbac-proxy/tags/list {"name":"kube-rbac-proxy","tags":["v0.4.1"]} [root@master prometheus]# vim metrics-state/kube-state-metrics-deployment.yaml 24: image: 192.168.1.100:5000/kube-rbac-proxy:v0.4.1 41: image: 192.168.1.100:5000/kube-rbac-proxy:v0.4.1 58: image: 192.168.1.100:5000/kube-state-metrics:v1.9.2 [root@master prometheus]# kubectl apply -f metrics-state/ [root@master prometheus]# kubectl -n monitoring get pod NAME READY STATUS RESTARTS AGE kube-state-metrics-5894f64799-krvn6 3/3 Running 0 4s
node-exporter安装

拷贝 prometheus/node-exporter 目录到 master 下

[root@master prometheus]# curl http://192.168.1.100:5000/v2/node-exporter/tags/list {"name":"node-exporter","tags":["v1.0.0"]} [root@master prometheus]# curl http://192.168.1.100:5000/v2/kube-rbac-proxy/tags/list {"name":"kube-rbac-proxy","tags":["v0.4.1"]} [root@master prometheus]# vim node-exporter/node-exporter-daemonset.yaml 27: image: 192.168.1.100:5000/node-exporter:v1.0.0 57: image: 192.168.1.100:5000/kube-rbac-proxy:v0.4.1 [root@master prometheus]# kubectl apply -f node-exporter/ [root@master prometheus]# kubectl -n monitoring get pod NAME READY STATUS RESTARTS AGE node-exporter-7h4l9 2/2 Running 0 7s node-exporter-7vxmx 2/2 Running 0 7s node-exporter-mr6lw 2/2 Running 0 7s node-exporter-zg2j8 2/2 Running 0 7s
Prometheus server安装

拷贝 prometheus/prom-server 目录到 master 下

[root@master prometheus]# curl http://192.168.1.100:5000/v2/prometheus/tags/list {"name":"prometheus","tags":["v2.11.0"]} [root@master prometheus]# vim prom-server/prometheus-prometheus.yaml 14: baseImage: 192.168.1.100:5000/prometheus 34: version: v2.11.0 [root@master prometheus]# kubectl apply -f prom-server/ [root@master prometheus]# kubectl -n monitoring get pod NAME READY STATUS RESTARTS AGE prometheus-k8s-0 3/3 Running 1 45s prometheus-k8s-1 3/3 Running 1 45s
alertmanager安装

拷贝 prometheus/alertmanager 目录到 master 下

[root@master prometheus]# curl http://192.168.1.100:5000/v2/alertmanager/tags/list {"name":"alertmanager","tags":["v0.18.0"]} [root@master prometheus]# vim alertmanager/alertmanager-alertmanager.yaml 09: baseImage: 192.168.1.100:5000/alertmanager 18: version: v0.18.0 [root@master prometheus]# kubectl apply -f alertmanager/ [root@master prometheus]# kubectl -n monitoring get pod NAME READY STATUS RESTARTS AGE alertmanager-main-0 2/2 Running 0 16s alertmanager-main-1 2/2 Running 0 16s alertmanager-main-2 2/2 Running 0 16s
grafana安装

拷贝 prometheus/grafana 目录到 master 下

[root@master prometheus]# curl http://192.168.1.100:5000/v2/grafana/tags/list {"name":"grafana","tags":["6.4.3"]} [root@master prometheus]# vim grafana/grafana-deployment.yaml 19: - image: 192.168.1.100:5000/grafana:6.4.3 [root@master prometheus]# kubectl apply -f grafana/ [root@master prometheus]# kubectl -n monitoring get pod NAME READY STATUS RESTARTS AGE grafana-647d948b69-d2hv9 1/1 Running 0 19s
发布prometheus服务

1、prometheus服务

[root@master prometheus]# cp prom-server/prometheus-service.yaml ./ [root@master prometheus]# vim prometheus-service.yaml apiVersion: v1 kind: Service metadata: labels: prometheus: k8s name: prometheus-k8s namespace: monitoring spec: type: NodePort ports: - name: web port: 9090 nodePort: 30001 targetPort: web selector: app: prometheus prometheus: k8s sessionAffinity: ClientIP [root@master prometheus]# kubectl apply -f prometheus-service.yaml [root@master prometheus]# kubectl -n monitoring get service NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) prometheus-k8s NodePort 10.254.111.220 <none> 9090:30001/TCP

2、grafana服务

[root@master prometheus]# cp grafana/grafana-service.yaml ./ [root@master prometheus]# vim grafana-service.yaml apiVersion: v1 kind: Service metadata: labels: app: grafana name: grafana namespace: monitoring spec: type: NodePort ports: - name: http port: 3000 nodePort: 30002 targetPort: http selector: app: grafana [root@master prometheus]# kubectl apply -f grafana-service.yaml [root@master prometheus]# kubectl -n monitoring get service NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) grafana NodePort 10.254.79.49 <none> 3000:30002/TCP

服务发布以后可以通过华为云弹性公网IP直接访问即可

grafana 第一次默认登录的用户名/密码(admin/admin)

HPA集群

集群图例
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实验步骤
[root@master ~]# vim hpa-example.yaml --- apiVersion: apps/v1 kind: Deployment metadata: name: myweb spec: selector: matchLabels: app: apache replicas: 1 template: metadata: labels: app: apache spec: containers: - name: apache image: 192.168.1.100:5000/myos:httpd ports: - containerPort: 80 resources: requests: cpu: 200m restartPolicy: Always --- apiVersion: v1 kind: Service metadata: name: web-service spec: ports: - protocol: TCP port: 80 targetPort: 80 selector: app: apache type: ClusterIP --- apiVersion: extensions/v1beta1 kind: Ingress metadata: name: my-app annotations: kubernetes.io/ingress.class: "nginx" spec: backend: serviceName: web-service servicePort: 80 --- apiVersion: autoscaling/v1 kind: HorizontalPodAutoscaler metadata: name: myweb spec: minReplicas: 1 maxReplicas: 3 scaleTargetRef: apiVersion: apps/v1 kind: Deployment name: myweb targetCPUUtilizationPercentage: 50 [root@master ~]# kubectl apply -f hpa-example.yaml [root@master ~]# kubectl get hpa NAME REFERENCE TARGETS MINPODS MAXPODS REPLICAS AGE myweb Deployment/myweb 0%/50% 1 3 1 15m

当容器的cpu占用超过 50% 的时候,自动扩展一个POD,依次扩展,一直到最大值

如果cpu访问不足 50% 的时候,每 300s 缩减一个 POD 节点,直到最小值时停止

访问测试可以使用镜像内提供的 info.php增加系统负载,从而查看状态信息

访问地址 http://ip.xx.xx.xx/info.php?id=1000000

id 为计算结果集的数量,id 越大,占用内存和CPU越高,设置特别大容易死机

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