Kubernetes Prometheus，非云原生监控项添加方式 非云原生监控Exports

这里拿mysql举例

在harbor主机下载个mysql镜像然后上传到harbor仓库。

然后创建svc deployment

root@k8s-master1:/apps/mysql# cat svc-deployument-mysql.yaml
apiVersion: v1
kind: Service
metadata:
  name: mysql-svc
spec:
  type: ClusterIP
  selector:
    apps: mysql
  ports:
  - port: 3306
    protocol: TCP
    targetPort: 3306
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: mysql-deployment
spec:
  replicas: 1
  selector:
    matchLabels:
      apps: mysql
  template:
    metadata:
      labels:
        apps: mysql
    spec:
      containers:
      - name: mysql
        image: images.guoguo.com/apps/mysql:5.7.23
        ports:
        - containerPort: 3306
        env:
        - name: MYSQL_ROOT_PASSWORD
          value: "mysql"

测试一下是否能登录

root@k8s-master1:/apps/mysql# kubectl get svc mysql-svc
NAME        TYPE        CLUSTER-IP       EXTERNAL-IP   PORT(S)    AGE
mysql-svc   ClusterIP   10.104.104.251   <none>        3306/TCP   89s

root@k8s-master1:/apps/mysql# telnet 10.104.104.251 3306
Trying 10.104.104.251...
Connected to 10.104.104.251.
Escape character is '^]'.
J
5.7.23TkgY0,RzYuz'\./V;mysql_native_password
#telnet测试一下 是否通

#进入数据库 创建监控用户
root@k8s-master1:/apps/mysql# mysql -uroot -h 10.104.104.251 -p'mysql'
mysql: [Warning] Using a password on the command line interface can be insecure.
Welcome to the MySQL monor.  Commands end wh ; or \g.
Your MySQL connection id is 3
Server version: 5.7.23 MySQL Communy Server (GPL)

Copyright (c) 2000, 2023, Oracle and/or s affiliates.

Oracle is a registered trademark of Oracle Corporation and/or s
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql> create user 'exporter@%' identified by '123456';
Query OK, 0 rows affected (0.01 sec)
##创建用户 

mysql> grant PROCESS,REPLICATION CLIENT,SELECT on *.* to 'exporter@%';
Query OK, 0 rows affected (0.00 sec)
#授权
mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)
#刷新权限
mysql>

创建用户授权

create user 'exporter@%' identified by '123456';
grant PROCESS,REPLICATION CLIENT,SELECT on *.* to 'exporter@%';

mysql监控的用户有了 现在需要一个mysql 的pxports

去prometheus官方下载

https://prometheus.io/download/

如果不是k8s 运行的那么在这下载就行

这就是个二进制文件，在运行mysql服务器上运行这个进程就行了

因为我们是k8s运行的mysql 我们需要下载镜像

docker pull prom/mysqld-exporter:latest

提前下载这个镜像 并在harbor仓库创建项目

docker tag prom/mysqld-exporter:latest images.guoguo.com/prom/mysqld-exporter:latest
docker push images.guoguo.com/prom/mysqld-exporter:latest
#改名上传到仓库

root@k8s-master1:/apps/mysql# cat mysql-export.yaml
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: mysql-exporter
  namespace: monoring
spec:
  replicas: 1
  selector:
    matchLabels:
      k8s-app: mysql-exporter
  template:
    metadata:
      labels:
        k8s-app: mysql-exporter
    spec:
      containers:
      - name: mysql-exporter
        image: images.guoguo.com/prom/mysqld-exporter:latest
        env:
        - name: DATA_SOURCE_NAME #变量名
          value: "exporter:123456@(mysql-svc.default:3306)/" #用户和密码 格式是固定的 mysql-svc是 service名称 .default 是default名称空间下的 service名称  这个mysql 就是service名称 上面不是创建了个mysql-svc的service嘛   3306 是端口号  如果上面创建在别的名称空间里面 那么就把default 改成对应的ns
        imagePullPolicy: IfNotPresent
        ports:
        - containerPort: 9104 #自己定义端口号 后面要通过这个端口号访问 接口
---
apiVersion: v1
kind: Service
metadata:
  name: mysql-exporter
  namespace: monoring
  labels:
    k8s-app: mysql-exporter
spec:
  type: ClusterIP
  selector:
    k8s-app: mysql-exporter
  ports:
    - name: api
      port: 9104 #这个端口号和上面那个关联
      protocol: TCP

上面是要运行一个mysql的rxporter

就是个deployment

相当于我们从网上下载的exporter 运行成pod 运行到k8s里面来

查看一下pod

root@k8s-master1:/apps/mysql# kubectl get pods -n monitoring
NAME                                   READY   STATUS    RESTARTS   AGE
alertmanager-main-0                    2/2     Running   0          5h
alertmanager-main-1                    2/2     Running   0          5h
alertmanager-main-2                    2/2     Running   0          5h
blackbox-exporter-55c457d5fb-h2jn6     3/3     Running   0          5h
grafana-6dd5b5f65-cxc5f                1/1     Running   0          5h
kube-state-metrics-9bf64fb88-kfc8h     3/3     Running   0          5h
mysql-exporter-7f6dd9487d-f7b9l        1/1     Running   0          2m28s
#这个就是
node-exporter-745dt                    2/2     Running   0          5h
node-exporter-95sxn                    2/2     Running   0          5h
node-exporter-j7tqq                    2/2     Running   0          5h
node-exporter-znxs4                    2/2     Running   0          5h
prometheus-adapter-59df95d9f5-cgs28    1/1     Running   0          5h
prometheus-adapter-59df95d9f5-r89kq    1/1     Running   0          5h
prometheus-k8s-0                       2/2     Running   1          4h45m
prometheus-k8s-1                       2/2     Running   1          4h45m
prometheus-operator-7775c66ccf-7zq2t   2/2     Running   0          5h1m

查看一下svc

root@k8s-master1:/apps/mysql# kubectl get svc -n monitoring
NAME                    TYPE        CLUSTER-IP       EXTERNAL-IP   PORT(S)                      AGE
alertmanager-main       ClusterIP   10.100.115.250   <none>        9093/TCP                     5h2m
alertmanager-operated   ClusterIP   None             <none>        9093/TCP,9094/TCP,9094/UDP   5h2m
blackbox-exporter       ClusterIP   10.107.81.48     <none>        9115/TCP,19115/TCP           5h2m
grafana                 NodePort    10.102.231.22    <none>        3000:31922/TCP               5h2m
kube-state-metrics      ClusterIP   None             <none>        8443/TCP,9443/TCP            5h2m
mysql-exporter          ClusterIP   10.101.27.78     <none>        9104/TCP                     4m15s
#这个就是
node-exporter           ClusterIP   None             <none>        9100/TCP                     5h2m
prometheus-adapter      ClusterIP   10.100.91.102    <none>        443/TCP                      5h2m
prometheus-k8s          NodePort    10.106.149.216   <none>        9090:30610/TCP               5h2m
prometheus-operated     ClusterIP   None             <none>        9090/TCP                     5h2m
prometheus-operator     ClusterIP   None             <none>        8443/TCP                     5h3m

root@k8s-master1:/apps/mysql# curl http://10.101.27.78:9104/metrics -k
#测试查看

如果有输出 就说明配置正确了

现在我有了exporter 再创建个 service Monitor 就可以了

apiVersion: monitoring.coreos.com/v1
kind: ServiceMonitor
metadata:
  name: mysql-exporter
  namespace: monitoring
  labels:
    k8s-app: mysql-exporter
    namespace: monitoring
spec:
  jobLabel: k8s-app
  endpoints:
  - port: api
    interval: 30s
    scheme: http
  selector: #最主要的就是这个  这个要关联上 service   刚才创建的mysql-exporter的svc
    matchLabels:  # 这里面没有tls conf 因为接口是http的不需要证书 
      k8s-app: mysql-exporter
  namespaceSelector:
    matchNames:
    - monitoring

创建

查看一下

root@k8s-master1:/apps/mysql# kubectl get servicemonitors.monitoring.coreos.com -n monitoring
NAME                      AGE
alertmanager              5h20m
blackbox-exporter         5h20m
coredns                   5h20m
etcd                      5h3m
grafana                   5h20m
kube-apiserver            5h20m
kube-controller-manager   5h20m
kube-scheduler            5h20m
kube-state-metrics        5h20m
kubelet                   5h20m
mysql-exporter            4m21s
# 这里刚才创建的
node-exporter             5h20m
prometheus-adapter        5h20m
prometheus-k8s            5h20m
prometheus-operator       5h20m

然后到prometheus提供的 ui界面看下

就有了

然后去搜mysql

https://grafana.com/grafana/dashboards/?plcmt=footer

得到链接或者 id 去粘贴

就得到了

这就相当于把集群外或者集群内的 非云原生的服务监控起来了

这算是集群之内的

如果是集群之外 需要创建endpoiont连接svc 导入进来

最主要的方式是去找响应的exporter，云原生的不需要找exporter

云原生默认给提供了metrics接口

只需要通过把集群外的映射到集群内来

集群内的有service的 都不需要映射 直接创建service monitor就可以了

非云原生的 就需要下载exporter镜像 利用exporter镜像运行成pod 然后指定service 然后去创建service monitor 去指定创建的exporter service就可以了 就可以直接通过 service monitor去找对应的 exporter 去找对应的监控项里面的数据