kube-prometheus安装

下载kube-prometheus

wget https://github.com/prometheus-operator/kube-prometheus/archive/refs/tags/v0.14.0.tar.gz

安装

tar -zxvf v0.14.0.tar.gz 
cd v0.14.0
kubectl apply --server-side -f manifests/setup
kubectl wait --for condition=Established --all CustomResourceDefinition --namespace=monitoring
kubectl apply -f manifests/

查看安装情况

kubectl get pod,svc -n monitoring -o wide

删除

kubectl delete --ignore-not-found=true -f manifests/ -f manifests/setup

参考

https://www.cnblogs.com/liugp/p/16444580.html

使用NodePort类型访问

• prometheus-service.yaml

apiVersion: v1
kind: Service
metadata:
  labels:
    app.kubernetes.io/component: prometheus
    app.kubernetes.io/instance: k8s
    app.kubernetes.io/name: prometheus
    app.kubernetes.io/part-of: kube-prometheus
    app.kubernetes.io/version: 2.54.1
  name: prometheus-k8s
  namespace: monitoring
spec:
  type: NodePort #增加
  ports:
  - name: web
    port: 9090
    nodePort: 30080 #增加
    targetPort: web
  - name: reloader-web
    port: 8080
    targetPort: reloader-web
  selector:
    app.kubernetes.io/component: prometheus
    app.kubernetes.io/instance: k8s
    app.kubernetes.io/name: prometheus
    app.kubernetes.io/part-of: kube-prometheus
  sessionAffinity: ClientIP

• grafana-service.yaml

apiVersion: v1
kind: Service
metadata:
  labels:
    app.kubernetes.io/component: grafana
    app.kubernetes.io/name: grafana
    app.kubernetes.io/part-of: kube-prometheus
    app.kubernetes.io/version: 11.2.0
  name: grafana
  namespace: monitoring
spec:
  type: NodePort #增加
  ports:
  - name: http
    port: 3000
    nodePort: 30081 #增加
    targetPort: http
  selector:
    app.kubernetes.io/component: grafana
    app.kubernetes.io/name: grafana
    app.kubernetes.io/part-of: kube-prometheus

• alertmanager-service.yaml

apiVersion: v1
kind: Service
metadata:
  labels:
    app.kubernetes.io/component: alert-router
    app.kubernetes.io/instance: main
    app.kubernetes.io/name: alertmanager
    app.kubernetes.io/part-of: kube-prometheus
    app.kubernetes.io/version: 0.27.0
  name: alertmanager-main
  namespace: monitoring
spec:
  type: NodePort #增加
  ports:
  - name: web
    port: 9093
    nodePort: 30082 #增加
    targetPort: web
  - name: reloader-web
    port: 8080
    targetPort: reloader-web
  selector:
    app.kubernetes.io/component: alert-router
    app.kubernetes.io/instance: main
    app.kubernetes.io/name: alertmanager
    app.kubernetes.io/part-of: kube-prometheus
  sessionAffinity: ClientIP

将service类型由"ClusterIP"改为"NodePort"无法使用nodeip+端口访问服务解决方法.

解决方法是删除monitoring命名空间下的网络策略让其从新加载pod间网络

kubectl delete networkpolicy --all -n monitoring

替换国内可用镜像

cd 0.14.0/manifests
 
grep -riE 'ghcr.io/|egistry.k8s.io/|quay.io|k8s.gcr|grafana/' *

grafana/grafana:11.2.0 替换成 swr.cn-north-4.myhuaweicloud.com/ddn-k8s/docker.io/grafana/grafana:11.2.0

registry.k8s.io/prometheus-adapter/prometheus-adapter:v0.12.0 替换成 swr.cn-north-4.myhuaweicloud.com/ddn-k8s/registry.k8s.io/prometheus-adapter/prometheus-adapter:v0.12.0

ghcr.io/jimmidyson/configmap-reload:v0.13.1 替换成 swr.cn-east-3.myhuaweicloud.com/kubesre/ghcr.io/jimmidyson/configmap-reload:v0.13.1

registry.k8s.io/kube-state-metrics/kube-state-metrics:v2.13.0 替换成 swr.cn-north-4.myhuaweicloud.com/ddn-k8s/registry.k8s.io/kube-state-metrics/kube-state-metrics:v2.13.0

查看自定义资源CRD

kubectl get customresourcedefinitions.apiextensions.k8s.io | grep monitoring.coreos.com 

定义规则

https://developer.aliyun.com/article/1046908

apiVersion: monitoring.coreos.com/v1

kind: PrometheusRule
metadata:
labels:
prometheus: k8s
ole: alert-rules
name: cusstom-rule
namespace: monitoring
spec:
groups:

• name: disk
  rules:
  • alert: diskFree
    annotations:
    summary: "{{ $labels.job }} 项目实例 {{ $labels.instance }} 磁盘使用率大于 80%"
    description: "{{ $labels.instance }} {{ $labels.mountpoint }} 磁盘使用率大于80% (当前的值: {{ $value }}%),请及时处理"
    expr: |
    (1-(node_filesystem_free_bytes{fstype=~"ext4|xfs",mountpoint!="/boot"} / node_filesystem_size_bytes{fstype=~"ext4|xfs",mountpoint!="/boot"}) )*100 > 80
    for: 1m
    labels:
    level: disaster
    severity: warning

https://gitee.com/crazywjj/K8S/blob/main/promethues/prometheus告警规则.md

参考
 
https://cloud.tencent.cn/developer/article/2327634
https://docker.aityp.com/manage/add
https://github.com/prometheus-operator/kube-prometheus
https://www.cnblogs.com/huangjiabobk/p/18126130