Prometheus监控PHP应用

要监控PHP状态信息，必须先配置显示PHP状态页，这样Prometheus才能通过Exporter进行监控。

1、配置PHP-FPM，暴露php-fpm状态信息

官方参考:https://easyengine.io/tutorials/php/fpm-status-page/
修改/usr/local/php/etc/php-fpm.conf，增加以下内容

pm.status_path = /status
ping.path = /ping

目前可用于监控PHP的Exporter有三个：

• https://github.com/bakins/php-fpm-exporter
• https://github.com/hipages/php-fpm_exporter
• https://github.com/Lusitaniae/phpfpm_exporter

本文只介绍前边两个

2、bakins/php-fpm-exporter监控PHP应用

bakins/php-fpm-exporter只能通过http读取PHP状态页信息，需要借助nginx来提供PHP状态页数据

2.1、配置php状态页的http访问

nginx.conf

server {
    listen 9010; 
    allow 127.0.0.1;   #限制ip
    allow 192.168.28.131;   #限制ip
    deny all;

    location ~ ^/(status|ping)$ {
        fastcgi_pass  unix:/tmp/php-cgi.sock; # unix socket
        #fastcgi_pass 127.0.0.1:9000;         # tcp
        fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
        include fastcgi_params;
    }
}

查看状态页数据

[root@ ~]# curl http://127.0.0.1:9010/status

# php-fpm状态页的内容如下
pool:                 www
process manager:      dynamic
start time:           24/Sep/2022:22:50:44 +0800
start since:          2219
accepted conn:        42
listen queue:         0
max listen queue:     0
listen queue len:     0
idle processes:       12
active processes:     1
total processes:      13
max active processes: 5
max children reached: 0
slow requests:        0

2.2、下载bakins/php-fpm-exporter

下载地址：https://github.com/bakins/php-fpm-exporter
下载文件:php-fpm-exporter.linux.amd64

mv php-fpm-exporter.linux.amd64 /usr/local/php-fpm-exporter
chmod u+x /usr/local/php-fpm-exporter

# php-fpm-exporter命令参数
usage: php-fpm-exporter []

Flags:
  -h, --help                   Show context-sensitive help (also try --help-long and --help-man).
      --addr="127.0.0.1:8080"  listen address for metrics handler
      --endpoint="http://127.0.0.1:9000/status"  url for php-fpm status
      --fastcgi=FASTCGI        fastcgi url. If this is set, fastcgi will be used instead of HTTP
      --web.telemetry-path="/metrics"
                               Path under which to expose metrics. Cannot be /

# 运行
/usr/local/php-fpm-exporter --addr 0.0.0.0:9011 --endpoint="http://127.0.0.1:9010/status" --web.telemetry-path="/metrics"

查看转成Prometheus监控指标的状态页数据

[root@s2 ~]# curl http://127.0.0.1:9011/metrics

2.3、配置为系统服务

vi /usr/lib/systemd/system/php_exporter.service

[Unit]
Description=php_exporter
Wants=network-online.target
After=network-online.target

[Service]
User=root
Group=root
Type=simple
ExecStart=/usr/local/php-fpm-exporter \
    --addr=0.0.0.0:9011 \
    --endpoint=http://127.0.0.1:9010/status \
    --web.telemetry-path=/metrics

[Install]
WantedBy=multi-user.target

php_exporter服务命令

systemctl daemon-reload       # 通知systemd重新加载配置文件
systemctl enable php_exporter   # 设置开机启动
systemctl disable php_exporter  # 取消开机启动
systemctl start php_exporter    # 启动服务
systemctl restart php_exporter  # 重启服务
systemctl stop php_exporter     # 关闭服务
systemctl status php_exporter   # 查看状态

2.4、配置防火墙

如果端口未开启，需要开启相关端口

#启动防火墙
systemctl start firewalld.service
#开通端口
firewall-cmd --zone=public --add-port=9011/tcp --permanent
#重启防火墙
firewall-cmd --reload

2.5、与Prometheus集成

prometheus.yml

scrape_configs:
  - job_name: 'PHP-FPM'
    static_configs:
      - targets: ['192.168.28.132:9011','192.168.28.136:9011']

重新加载配置

curl -X POST  http://127.0.0.1:9090/-/reload   # prmetheus不需要登录 
curl -X POST  http://admin@123456:127.0.0.1:9090/-/reload  # prmetheus需要登录

2.6、与Grafana集成

可视化模板：https://grafana.com/grafana/dashboards/3901-php-fpm/

3、hipages/php-fpm_exporter监控php应用

3.1、下载

下载:https://github.com/hipages/php-fpm_exporter
下载文件：php-fpm_exporter_2.2.0_linux_amd64

mv php-fpm_exporter_2.2.0_linux_amd64 /usr/local/php-fpm_exporter
chmod u+x /usr/local/php-fpm_exporter

# 运行命令有两个
# get方式是在命令行下显示结果 
sudo -u www /usr/local/php-fpm_exporter get --phpfpm.scrape-uri "unix:///tmp/php-cgi.sock;/status"

# server方式是以web方式示结果
sudo -u www /usr/local/php-fpm_exporter server --web.listen-address ":9253" --phpfpm.scrape-uri "unix:///tmp/php-cgi.sock;/status"
# web方式示结果查看监控数据
curl http://127.0.0.1:9253/metrics

3.2、配置为系统服务

vi /usr/lib/systemd/system/php_exporter2.service

[Unit]
Description=php_exporter2
Wants=network-online.target
After=network-online.target

[Service]
User=www
Group=www
Type=simple
ExecStart=/usr/local/php-fpm_exporter server \
    --web.listen-address ":9253" \
    --web.telemetry-path "/metrics" \
    --phpfpm.scrape-uri "unix:///tmp/php-cgi.sock;/status"
#    --phpfpm.scrape-uri "tcp://127.0.0.1:9000/status"
[Install]
WantedBy=multi-user.target

php_exporter2服务命令

systemctl daemon-reload       # 通知systemd重新加载配置文件
systemctl enable php_exporter2   # 设置开机启动
systemctl disable php_exporter2  # 取消开机启动
systemctl start php_exporter2    # 启动服务
systemctl restart php_exporter2  # 重启服务
systemctl stop php_exporter2     # 关闭服务
systemctl status php_exporter2   # 查看状态

vi /etc/passwd

www:x:1002:1002::/home/www:/sbin/nologin
# 修改为
www:x:1002:1002::/home/www:/bin/bash

3.3、与Prometheus集成

scrape_configs:
  - job_name: 'PHP-FPM2'
    static_configs:
      - targets: ['192.168.28.136:9253']
        labels:
          namespace: '192.168.28.136:9253'
      - targets: ['192.168.28.132:9253']
        labels:
          namespace: '192.168.28.132:9253'

3.4、与Grafana集成

可视化模板:https://grafana.com/grafana/dashboards/15796-php-fpm/