Prometheus监控不携带metrics接口的服务

目录

• Prometheus监控不携带metrics接口的服务
  • 一、prometheus监控不携带metrics接口的服务的流程
  • 二、prometheus监控nginx
    • 2.1、创建实验环境：部署一个nginx，加载nginx监控插件
    • 2.2、部署expertor，创造一个metrics接口
    • 2.3、创建EndPrints，链接expertor暴漏出来的metrics接口
    • 2.4、部署Service，给予ServiceMonitor使用
    • 2.5、创建ServiceMonitor，注入prometheus

Prometheus监控不携带metrics接口的服务

prometheus监控分为两种：

​ 1、携带metircs接口的服务

​ 2、不携带metrics接口的服务

一、prometheus监控不携带metrics接口的服务的流程

监控不携带metrics接口的服务，需要先创建一个metrics接口，从而进行监控

1、部署expertor，从而创建一个metrics接口

2、部署EndPrints，连接expertor暴漏出来的metrics接口

3、部署Service，给予ServiceMonitor使用

4、创建ServiceMonitor，注入prometheus

5、测试

二、prometheus监控nginx

2.1、创建实验环境：部署一个nginx，加载nginx监控插件

#安装nginx
[root@k8s-node-02 ~]# vim /etc/yum.repos.d/nginx.repo
[nginx-stable]
name=nginx stable repo
baseurl=http://nginx.org/packages/centos/$releasever/$basearch/
gpgcheck=1
enabled=1
gpgkey=https://nginx.org/keys/nginx_signing.key
module_hotfixes=true

[root@k8s-node-02 ~]# yum clean all
[root@k8s-node-02 ~]# yum makecache
[root@k8s-node-02 ~]# yum install -y nginx

#修改配置文件，启动nginx监控
[root@k8s-node-02 ~]# vim /etc/nginx/conf.d/default.conf
server {
    listen       80;
    server_name  localhost;
    location = /status {
        stub_status;
    }
    location / {
        root   /usr/share/nginx/html;
        index  index.html index.htm;
    }
}
#重启nginx，载入配置文件
[root@k8s-node-02 ~]# systemctl restart nginx

#在其他服务器上访问测试
[root@k8s-master-01 ~]# curl 192.168.15.33/status
Active connections: 1 
server accepts handled requests
 1 1 1 
Reading: 0 Writing: 1 Waiting: 0

2.2、部署expertor，创造一个metrics接口

• 创建一个服务，获取并格式化metrics接口数据

kind: Deployment
apiVersion: apps/v1
metadata:
  name: nginx-prometheus-exporter
spec:
  selector:
    matchLabels:
      k8s: nginx-prometheus
  template:
    metadata:
      labels:
        k8s: nginx-prometheus
    spec:
      containers:
        - name: nginx-exporter
          image: nginx/nginx-prometheus-exporter:0.9.0
          imagePullPolicy: IfNotPresent
          command:
            - "nginx-prometheus-exporter"
            - "-nginx.scrape-uri=http://192.168.12.90/status"

• 创建一个sercice，给予peometheus集群获取metrics接口提供的格式化的监控数据

kind: Service
apiVersion: v1
metadata:
  name: nginx-prometheus-exporter
spec:
  ports:
    - port: 9113
      targetPort: 9113
      name: nginx-prometheus-exporter
      protocol: TCP
  selector:
    k8s: nginx-prometheus

• 查看创建结果

[root@k8s-master-01 prometheus-nginx]# kubectl apply -f ./[上述两个文件]
[root@k8s-master-01 prometheus-nginx]# kubectl get svc,pod
NAME                                TYPE        CLUSTER-IP      EXTERNAL-IP   PORT(S)          AGE
service/nginx-prometheus-exporter   ClusterIP   10.108.25.181   <none>        9113/TCP         45s

NAME                                                     READY   STATUS    RESTARTS   AGE
pod/nginx-prometheus-exporter-7cd66d4df-wll78            1/1     Running   0          44s

• 测试

[root@k8s-master-01 prometheus-nginx]# curl 10.108.25.181:9113/metrics
# HELP nginx_connections_accepted Accepted client connections
# TYPE nginx_connections_accepted counter
nginx_connections_accepted 25
# HELP nginx_connections_active Active client connections
# TYPE nginx_connections_active gauge
nginx_connections_active 2
# HELP nginx_connections_handled Handled client connections
# TYPE nginx_connections_handled counter
nginx_connections_handled 25
# HELP nginx_connections_reading Connections where NGINX is reading the request header
# TYPE nginx_connections_reading gauge
nginx_connections_reading 0
# HELP nginx_connections_waiting Idle client connections
# TYPE nginx_connections_waiting gauge
nginx_connections_waiting 1
# HELP nginx_connections_writing Connections where NGINX is writing the response back to the client
# TYPE nginx_connections_writing gauge
nginx_connections_writing 1
# HELP nginx_http_requests_total Total http requests
# TYPE nginx_http_requests_total counter
nginx_http_requests_total 16799
# HELP nginx_up Status of the last metric scrape
# TYPE nginx_up gauge
nginx_up 1
# HELP nginxexporter_build_info Exporter build information
# TYPE nginxexporter_build_info gauge
nginxexporter_build_info{commit="5f88afbd906baae02edfbab4f5715e06d88538a0",date="2021-03-22T20:16:09Z",version="0.9.0"} 1

2.3、创建EndPrints，链接expertor暴漏出来的metrics接口

# 参考上述Service，此处无需重复创建。

2.4、部署Service，给予ServiceMonitor使用

# 参考上述Service，此处无需重复创建。

2.5、创建ServiceMonitor，注入prometheus

kind: ServiceMonitor
apiVersion: monitoring.coreos.com/v1
metadata:
  labels:
    k8s: nginx-prometheus
  name: nginx-monitor
  namespace: monitoring
spec:
  endpoints:
    - interval: 3s
      port: nginx-prometheus-exporter
      path: metrics
  selector:
    matchLabels:
      k8s: nginx-prometheus
  namespaceSelector:
    matchNames:
      - "default"

• 查看部署结果

[root@k8s-master-01 prometheus-nginx]# kubectl apply -f servicemonitor.yaml 
servicemonitor.monitoring.coreos.com/nginx-monitor created
[root@k8s-master-01 prometheus-nginx]# kubectl get servicemonitors -n monitoring 
NAME                      AGE
nginx-monitor             18s