prometheus simple monitoring of Linux, mysql, nginx

prometheus installation

Download and install

#官网下载 解压即可使用
https://prometheus.io/download/
#docker 方式安装
sudo docker run -n prometheus -d -p 9090:9090 prom/prometheus

Profiles

 /etc/prometheus/prometheus.yml 或 可执行文件当前目录下/prometheus.yml

Complete profile

  scheme: http
  static_configs:
  - targets:
    - localhost:9090
- job_name: node1_self
  honor_timestamps: true
  scrape_interval: 15s
  scrape_timeout: 10s
  metrics_path: /metrics
  scheme: http
  static_configs:
  - targets:
    - 192.168.3.103:9100
- job_name: mysql
  honor_timestamps: true
  scrape_interval: 15s
  scrape_timeout: 10s
  metrics_path: /metrics
  scheme: http
  static_configs:
  - targets:
    - 192.168.3.103:9104
    labels:
      instance: db1
- job_name: nginx
  honor_timestamps: true
  scrape_interval: 15s
  scrape_timeout: 10s
  metrics_path: /status/format/prometheus
  scheme: http
  static_configs:
  - targets:
    - 192.168.3.139:80
    labels:
      instance: web1
  basic_auth:
    username: UserName
    password: PassWord

Restart Service

Restart the service or signal reload the configuration
killall -HUP prometheus

Daquan official exports

https://prometheus.io/docs/instrumenting/exporters/

Linux server configuration

Download and install node_exporter (download extract can be used)

https://github.com/prometheus/node_exporter/releases/download/v0.18.1/node_exporter-0.18.1.linux-amd64.tar.gz
./node_exporter
测试node_exporter
curl http://localhost:9100/metrics

mysql download and configure the exporter

Mysql can be installed on the machine can also be installed on other machines
`the old way must extract
https://github.com/prometheus/mysqld_exporter/releases

1. To configure what information is being monitored mysql account
   best configure permissions individually
   to mysqld_exporter create a separate user
   and give it limited authority (PROCESS, REPLICATION CLIENT, SELECT)
   preferably also limit its maximum number (MAX_USER_CONNECTIONS) connection

CREATE USER 'exporter'@'localhost' IDENTIFIED BY 'password' WITH MAX_USER_CONNECTIONS 3;
GRANT PROCESS, REPLICATION CLIENT, SELECT ON *.* TO 'exporter'@'localhost';

$ cat .my.cnf
[client]
host=localhost
port=3306
user=root
password=123456

1. 运行mysqld_exporter
   `./mysqld_exporter --config.my-cnf=".my.cnf"

2. In prometheus server configuration files prometheus.ymlfound in the scrape_configAdd child a job
   such as:

  - job_name: mysql
    static_configs:
      - targets: ['192.168.1.7:9104']
        labels:
          instance: db1

1. Overload signal transmission profile
   killall -SIGHUP prometheus
2. Prometheus pages to 导航栏->status->targetsee just added success!

Installation and Configuration nginx exporter

Many ways can .lua script, openresty and so
we have chosen to compile the nginx nginx-module-vtsThis means that we have to manually compile their own.

1. Download nginx source after decompression.
   wget https://github.com/nginx/nginx/releases/tag/release-1.17.1
tar -xvf nginx-release-1.17.1.tar.gz
cd nginx-release-1.17.1
2. Download or cloning nginx-module-vtsmodule https://github.com/vozlt/nginx-module-vts
3. Compile and install nginx
   compiled rely skip
   ..
   ./auto/configure --add-module=/home/pi/nginx-module-vts --with-http_ssl_module --with-debug
   kill nginx
   make -j4using four threads compiler. Raspberry Pi has four threads
   make installinstall nginx default
   4. Configure nginx configuration file
   vim /usr/local/nginx/conf/nginx.conf

user root;
#user  nobody;
worker_processes  2;

#error_log  logs/error.log;
#error_log  logs/error.log  notice;
#error_log  logs/error.log  info;

#pid        logs/nginx.pid;


events {
    worker_connections  1024;
}



http {
    include       mime.types;
    default_type  application/octet-stream;
    vhost_traffic_status_zone;
    #log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
    #                  '$status $body_bytes_sent "$http_referer" '
    #                  '"$http_user_agent" "$http_x_forwarded_for"';

    #access_log  logs/access.log  main;

    sendfile        on;
    #tcp_nopush     on;

    #keepalive_timeout  0;
    keepalive_timeout  65;

    #gzip  on;

    server {
        listen       80;
        server_name  localhost;

        #charset koi8-r;
    charset utf-8;
        #access_log  logs/host.access.log  main;

        location / {
            root   html;
        auth_basic "needAuth";
        auth_basic_user_file /usr/local/nginx/conf/passwd.db;
        }
    location /status {
        vhost_traffic_status_display;
        vhost_traffic_status_display_format html;
    }
        #error_page  404              /404.html;

        # redirect server error pages to the static page /50x.html
        #
        error_page   500 502 503 504  /50x.html;
        location = /50x.html {
            root   html;
        }

   
    }

}

Configuring http password
apt install apache2-utils -y
htpasswd -c /usr/local/nginx/conf/passwd.db UserName
to start nginx
look under the module has not compiled in

cd /usr/local/nginx/
/usr/local/nginx/sbin/nginx -V |grep nginx-module-vts

You can see the information on behalf of the compiler module successfully.

1. Running nginx
   /usr/local/nginx/sbin/nginx
   4.1 View ip nginx machine
   ip a
2. Add a monitoring mission in prometheus the nginx
   add content configuration profile prometheus.ymlattention because we nginx configuration verification, validation prometheus so they will have to add in. Otherwise there is no way supports access

- job_name: nginx
  honor_timestamps: true
  scrape_interval: 15s
  scrape_timeout: 10s
  metrics_path: /status/format/prometheus
  scheme: http
  static_configs:
  - targets:
    - 192.168.3.139:80
    labels:
      instance: web1
  basic_auth:
    username: UserName
    password: PassWord

1. Overload signal transmission profile
   killall -SIGHUP prometheus
2. Prometheus pages to 导航栏->status->targetsee just added success!

And be followed with a Grafana can have fun.