Prometheus部署各服务的Node监控

1、部署监控主机

部署主机监控，需要安装node_exporter

1.1 下载node exporter

wget https://github.com/prometheus/node_exporter/releases/download/v0.18.1/node_exporter-0.18.1.linux-amd64.tar.gz
tar -xf node_exporter-0.18.1.linux-amd64.tar.gz
#新建一个目录专门安装各种exporter
mkdir -p /export/prometheus_exporter
mv node_exporter-0.18.1.linux-amd64 /export/prometheus_exporter/
cd /export/prometheus_exporter/
mv node_exporter-0.18.1.linux-amd64/ node_exporter

1.2 加入linux服务，启动node exporter

直接打开node_exporter的可执行文件即可启动 node export，默认会启动9100端口。建议使用systemctl来启动

# vim /etc/systemd/system/node_exporter.service 

[Unit]
Description=node_exporter
After=network.target

[Service]
Restart=on-failure
ExecStart=/export/prometheus_exporter/node_exporter/node_exporter

[Install]
WantedBy=multi-user.target

1.3 加入开机启动

# systemctl enable node_exporter

# systemctl start node_exporter

1.4 配置Prometheus，收集node exporter的数据

可以看到node exporter启动后也就是暴露了9100端口，并没有把数据传到prometheus，我们还需要在prometheus中配置，让prometheus去pull这个接口的数据。
编辑prometheus.yml文件，增加后面4行.

scrape_configs:
  - job_name: 'prometheus'
    static_configs:
    - targets: ['localhost:9090']

   #采集node exporter监控数据
  - job_name: 'node'
    static_configs:
    - targets: ['localhost:9100']

然后重启prometheus，打开prometheus页面查看是不是有对应的数据了。

 在prometheus的web界面看到这个节点是up的状态了。

2、部署监控Redis

部署主机监控，需要安装redis_exporter

2.1 下载redis exporter

#使用docker启动redis监控客户端
docker run -d --name redis_exporter -p 9121:9121 oliver006/redis_exporter --restart=always
# docker ps
CONTAINER ID        IMAGE                      COMMAND                 CREATED             STATUS              PORTS                    NAMES
23f8171fb0af        oliver006/redis_exporter   "/bin/redis_exporter"   3 seconds ago       Up 3 seconds 

2.2 配置Prometheus.yaml文件

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']
  - job_name: node_exporter
    static_configs:
    - targets: ['10.39.43.120:9100']
  - job_name: 'mysql global status'
    scrape_interval: 15s
    static_configs:
    - targets:
        - 10.39.43.120:9104
    params:
      collect[]:
        - global_status
  - job_name: 'mysql performance'
    scrape_interval: 1m
    static_configs:
      - targets:
        - '10.39.43.120:9104'
    params:
      collect[]:
        - perf_schema.tableiowaits
        - perf_schema.indexiowaits
        - perf_schema.tablelocks
  - job_name: redis_exporter
    static_configs:
    - targets: ['10.39.43.120:9121']