kube-prometheus 是一整套监控解决方案，它使用 Prometheus 采集集群指标，Grafana 做展示，包含如下组件：
- The Prometheus Operator
- Highly available Prometheus
- Highly available Alertmanager
- Prometheus node-exporter
- Prometheus Adapter for Kubernetes Metrics APIs （k8s-prometheus-adapter）
- kube-state-metrics
- Grafana
其中 k8s-prometheus-adapter使用 Prometheus 实现了 metrics.k8s.io和 custom.metrics.k8s.io API，所以不需要再部署 metrics-server。
#下载
https://github.com/prometheus-operator/kube-prometheus.git
#修改service类型为NodePort
prometheus service
$ cat prometheus-service.yaml
apiVersion: v1
kind: Service
metadata:
labels:
prometheus: k8s
name: prometheus-k8s
namespace: monitoring
spec:
type: NodePort
ports:
- name: web
port: 9090
targetPort: web
nodePort: 30090
selector:
app: prometheus
prometheus: k8s
sessionAffinity: ClientIP
alertmanager service
$ cat alertmanager-service.yaml
apiVersion: v1
kind: Service
metadata:
labels:
alertmanager: main
name: alertmanager-main
namespace: monitoring
spec:
type: NodePort
ports:
- name: web
port: 9093
targetPort: web
nodePort: 30093
selector:
alertmanager: main
app: alertmanager
sessionAffinity: ClientIP
grafana service
$ cat grafana-service.yaml
apiVersion: v1
kind: Service
metadata:
labels:
app: grafana
name: grafana
namespace: monitoring
spec:
type: NodePort
ports:
- name: http
port: 3000
targetPort: http
nodePort: 32000
selector:
app: grafana
#安装
cd kube-prometheus/
kubectl apply -f manifests/setup # 安装 prometheus-operator
kubectl apply -f manifests/ # 安装 promethes metric adapter
#访问地址
http://NodeIP:32000/ # grafana
http://NodeIP:30090/ # prometheus
http://NodeIP:30093/ # alertmanager
#相关文档
https://blog.csdn.net/guoxiaobo2010/article/details/106532357/
https://k8s-install.opsnull.com/08-4.kube-prometheus%E6%8F%92%E4%BB%B6.html
https://github.com/prometheus-operator/kube-prometheus
