Prometheus 安装和配置

  • 不错的发展史说明：https://caicloud.io/blog/5a5db4203255f5063f2bd462
  • 特别说明：一般这类环境要尽可能保证所有服务器时间一致
  • Prometheus 本地存储不适合存长久数据，一般存储一个月就够了。要永久存储需要用到远端存储，远端存储可以用 OpenTSDB
  • Prometheus 也不适合做日志存储，日志存储还是推荐 ELK 方案

Prometheus Docker 安装

# my global config
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:
  - job_name: 'springboot'
    metrics_path: '/tkey-actuator/actuator/prometheus'
    static_configs:
    - targets: ['192.168.2.225:8811']
  • 启动
docker run -d --name prometheus -p 9091:9090 \
-v /data/docker/prometheus/config/prometheus.yml:/etc/prometheus/prometheus.yml \
prom/prometheus

配置

CentOS7 服务器

  • 当前最新版本：node_exporter 0.18.1（201907）
mkdir -p /usr/local/prometheus/node_exporter

cd /usr/local/prometheus/node_exporter

wget https://github.com/prometheus/node_exporter/releases/download/v0.18.1/node_exporter-0.18.1.linux-amd64.tar.gz

tar -zxvf node_exporter-0.18.1.linux-amd64.tar.gz

创建Systemd服务
vim /etc/systemd/system/node_exporter.service



[Unit]
Description=node_exporter
After=network.target

[Service]
Type=simple
User=root
ExecStart=/usr/local/prometheus/node_exporter/node_exporter-0.18.1.linux-amd64/node_exporter
Restart=on-failure

[Install]
WantedBy=multi-user.target

启动 Node exporter
systemctl start node_exporter

systemctl daemon-reload

systemctl status node_exporter

修改prometheus.yml，加入下面的监控目标：

vim  /data/docker/prometheus/config/prometheus.yml

scrape_configs:
  - job_name: 'centos7'
    static_configs:
    - targets: ['192.168.1.3:9100']
      labels:
        instance: centos7_node1

Nginx 指标

git clone --depth=1 https://github.com/vozlt/nginx-module-vts.git


编译 nginx 的时候加上：
./configure --prefix=/usr/local/nginx --with-http_ssl_module --add-module=/opt/nginx-module-vts

make（已经安装过了，就不要再 make install）

也有人做好了 docker 镜像：
https://hub.docker.com/r/xcgd/nginx-vts

docker run --name nginx-vts -p 80:80 -v /data/docker/nginx/conf/nginx.conf:/etc/nginx/nginx.conf:ro -d xcgd/nginx-vts

修改Nginx配置


http {
    vhost_traffic_status_zone;
    vhost_traffic_status_filter_by_host on;

    ...

    server {

        ...

        location /status {
            vhost_traffic_status_display;
            vhost_traffic_status_display_format html;
        }
    }
}


验证nginx-module-vts模块：http://192.168.1.3/status，会展示：
Nginx Vhost Traffic Status 统计表

如果不想统计流量的server，可以禁用vhost_traffic_status，配置示例：
server {
    ...
    vhost_traffic_status off;
    ...
}
  • 安装 nginx-vts-exporter
官网版本：https://github.com/hnlq715/nginx-vts-exporter/releases

wget https://github.com/hnlq715/nginx-vts-exporter/releases/download/v0.10.3/nginx-vts-exporter-0.10.3.linux-amd64.tar.gz

tar zxvf nginx-vts-exporter-0.10.3.linux-amd64.tar.gz

chmod +x /usr/local/nginx-vts-exporter-0.10.3.linux-amd64/nginx-vts-exporter

创建Systemd服务
vim /etc/systemd/system/nginx_vts_exporter.service


[Unit]
Description=nginx_exporter
After=network.target

[Service]
Type=simple
User=root
ExecStart=/usr/local/nginx-vts-exporter-0.10.3.linux-amd64/nginx-vts-exporter -nginx.scrape_uri=http://192.168.1.3/status/format/json
Restart=on-failure

[Install]
WantedBy=multi-user.target

启动nginx-vts-exporter
systemctl start nginx_vts_exporter.service
systemctl daemon-reload
systemctl status nginx_vts_exporter.service

修改 prometheus.yml，加入下面的监控目标：
vim  /data/docker/prometheus/config/prometheus.yml

scrape_configs:
  - job_name: 'nginx'
    static_configs:
    - targets: ['192.168.1.3:9913']
      labels:
        instance: nginx1


如果nginx 有加 basic auth，则需要这样：
scrape_configs:
  - job_name: "nginx"
    metrics_path: /status/format/prometheus
    basic_auth:
      username: youmeek
      password: '123456'
    static_configs:
    - targets: ['192.168.1.3:9913']
      labels:
        instance: 'nginx1'

微服务下的多服务收集

告警

远端存储方案

其他资料

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