prometheus安装和oracle告警配置

news2024/9/22 15:29:50

一、安装Prometheus

通过git下载新版本promethus

mv prometheus-2.40.1.linux-amd64.tar.gz /usr/local/
cd /usr/local
tar zxvf prometheus-2.40.1.linux-amd64.tar.gz
cd /usr/local/prometheus-2.40.1.linux-amd64

vim prometheus.yml

global:
  scrape_interval: 15s # Set the scrape interval to every 15 seconds. Default is every 1 minute.
  evaluation_interval: 15s # Evaluate rules every 15 seconds. The default is every 1 minute.
  # scrape_timeout is set to the global default (10s).

# Alertmanager configuration
alerting:
  alertmanagers:
    - static_configs:
        - targets:
          # - alertmanager:9093

# Load rules once and periodically evaluate them according to the global 'evaluation_interval'.
rule_files:
  # - "first_rules.yml"
  # - "second_rules.yml"

# A scrape configuration containing exactly one endpoint to scrape:
# Here it's Prometheus itself.
scrape_configs:
  # The job name is added as a label `job=<job_name>` to any timeseries scraped from this config.
  - job_name: "prometheus"

    # metrics_path defaults to '/metrics'
    # scheme defaults to 'http'.

    static_configs:
      - targets: ["localhost:9090"]

启动方式：

nohup ./prometheus &

访问 http://ip:9090

二、配置邮件告警

1、下载邮件模块

Tags · prometheus/alertmanager · GitHub

tar zxvf alertmanager-0.24.0.linux-amd64.tar.gz
mv alertmanager-0.24.0.linux-amd64 /usr/local/
cd /usr/local/alertmanager-0.24.0.linux-amd64

2、修改配置

vim alertmanager.yml

这里以163邮件为准

global:
  resolve_timeout: 5m
  ###################################
  smtp_auth_username: "********@163.com"
  smtp_auth_password: "********"
  #smtp_auth_secret: "********"
  smtp_require_tls: false
  smtp_smarthost: "smtp.163.com:25"
  smtp_from: "********@163.com"
  ####################################
route:
  group_by: ['alertname']
  group_wait: 10s
  group_interval: 10s
  repeat_interval: 1h
  receiver: 'email'

receivers:
- name: 'email'
  email_configs:
  - send_resolved: true
    to: '********@qq.com'
inhibit_rules:
  - source_match:
      severity: 'critical'
    target_match:
      severity: 'warning'
    equal: ['alertname', 'dev', 'instance']

如果需要添加多人告警则receivers的to后面添加邮箱地址：

receivers:
- name: 'email'
  email_configs:
  - send_resolved: true
    to: '********@qq.com,*****@163.com'

3、启动alertmanager告警模块

nohup ./alertmanager &

检查告警模块配置文件是否正常

./amtool check-config alertmanager.yml

启动后看到的界面

4、集合到prometheus

修改以下一行即可

这里的10.60.10.198改为对应alertmanager的模块地址重启prometheus即可

# Alertmanager configuration
alerting:
  alertmanagers:
    - static_configs:
      - targets:
          - 10.60.10.198:9093

三、监控Oracle

下载oracle_exporter

Tags · iamseth/oracledb_exporter · GitHub

1 、安装

tar zxvf oracledb_exporter.0.3.0rc1-ora18.5.linux-amd64.tar.gz
mv oracledb_exporter.0.3.0rc1-ora18.5.linux-amd64 /usr/local

2、配置添加oracle参数

这里就是要监控的数据库实例的用户名和密码

su - oracle
vim ~/.bah_profile
# oracledb_exporter
export DATA_SOURCE_NAME=oratest/oratest
export LD_LIBRARY_PATH=$ORACLE_HOME/lib

启动的时候正常会报一个 libclntsh.so.18.1缺失的报错(这里要注意针对自己环境的ORACLE_HOME路径去做这个软链接)

ln -s /u01/app/oracle/product/11.2.0/db_1/lib/libclntsh.so.11.1 /u01/app/oracle/product/11.2.0/db_1/lib/libclntsh.so.18.1

3、启动oracle监控

cd /usr/local/oracledb_exporter.0.3.0rc1-ora18.5.linux-amd64
nohup ./oracledb_exporter &

4、结合到Prometheus

在prometheus.yml最后增加以下内容，重启Prometheus即可（IP即Oracle数据库的IP）

######################## Oracle监控 ##########################
  - job_name: 'oracle'
    metrics_path: '/metrics'
    static_configs:
    - targets: ['10.60.10.190:9161']

四、配置告警

修改Prometheus配置文件启用rule_files(这个在默认配置里面有该配置没有的话加到alertmanagers后面即可)配置完成重启prometheus进程

rule_files:
   - "first_rules.yml"

配置oracle实例监控进程

这里有个关键字oracledb_up 1

我们通过监控这个关键字来确认数据库实例是否启动

配置启用的rule文件

cd /usr/local/prometheus-2.40.1.linux-amd64
vim first_rules.yml

groups:
  - name: node-alert
    rules:
    - alert: Oracle Status
      expr: oracledb_up == 0
      for: 5s
      labels:
        severity: warning
      annotations:
        summary: "{{$labels.instance}}: Oracle has stop "
        description: "数据库挂了,请检查"

重启Prometheus

在Alerts下出现一个oracle status