Prometheus 监控linux服务器

Prometheus 监控linux服务器

node_exporter：用于*NIX系统监控，使用Go语言编写的收集器。

 

• 使用版本
• node_exporter 0.17.0

• 相关文档
• 使用文档：https://prometheus.io/docs/guides/node-exporter/
• GitHub：https://github.com/prometheus/node_exporter
• exporter列表：https://prometheus.io/docs/instrumenting/exporters/

• 百度云下载：node_exporter 0.17.0
• 地址：https://pan.baidu.com/s/1kXKs6oiGFwubsJ-cGvWykg
• 密码：vrpk

安装监控客户端

1、下载到被监控的linux系统

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

2、解压压缩包

[root@server02 ~]# tar xvfz node_exporter-0.17.0.linux-amd64.tar.gz

3、移动并进入目录

[root@server02 ~]# mv node_exporter-0.17.0.linux-amd64 /usr/local/node_exporter

4、启动node_exporter服务，默认9100端口

[root@server02 ~]# cd /usr/local/node_exporter
[root@server02 node_exporter]# ./node_exporter

常用参数：
# 收集文件系统，忽略哪些不搜集
--collector.filesystem.ignored-mount-points="^/(dev|proc|sys|var/lib/docker/.+)($|/)"  
# 管理的系统服务
--collector.systemd.unit-whitelist=".+"
# 指定监听端口 默认9100
--web.listen-address=":9100"
常用启动参数

5、添加系统服务：vi /usr/lib/systemd/system/node_exporter.service

[Unit]
Description=https://prometheus.io

[Service]
Restart=on-failure
ExecStart=/usr/local/node_exporter/node_exporter --conllector.systemd --conllector.systemd.unit-whitelist=(docker|kubelet|kube-proxy|flanneld).service

[Install]
WantedBy=multi-user.target

6、启动添加后的系统服务

systemctl daemon-reload
systemctl restart node_exporter

7、查看导出器导出的数据信息：http://192.168.1.221:9100/metrics

# HELP go_gc_duration_seconds A summary of the GC invocation durations.
# TYPE go_gc_duration_seconds summary
go_gc_duration_seconds{quantile="0"} 0
go_gc_duration_seconds{quantile="0.25"} 0
go_gc_duration_seconds{quantile="0.5"} 0
go_gc_duration_seconds{quantile="0.75"} 0
go_gc_duration_seconds{quantile="1"} 0
go_gc_duration_seconds_sum 0
go_gc_duration_seconds_count 0
# HELP go_goroutines Number of goroutines that currently exist.
# TYPE go_goroutines gauge
go_goroutines 7
# HELP go_info Information about the Go environment.
# TYPE go_info gauge
go_info{version="go1.11.2"} 1
# HELP go_memstats_alloc_bytes Number of bytes allocated and still in use.
# TYPE go_memstats_alloc_bytes gauge
go_memstats_alloc_bytes 1.075736e+06
# HELP go_memstats_alloc_bytes_total Total number of bytes allocated, even if freed.
# TYPE go_memstats_alloc_bytes_total counter
go_memstats_alloc_bytes_total 1.075736e+06
# HELP go_memstats_buck_hash_sys_bytes Number of bytes used by the profiling bucket hash table.

使用prometheus监控客户端实例

1、添加新的job服务发现获取新的node：vim prometheus.yml

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: ['server04:9090']
  - job_name: 'server02'
    file_sd_configs:
      - files: ['/usr/local/prometheus/sd_config/node01.yml']
        refresh_interval: 5s
  - job_name: 'server03'
    file_sd_configs:
      - files: ['/usr/local/prometheus/sd_config/node02.yml']
        refresh_interval: 5s

2、新建配置文件并添加node：vim /usr/local/prometheus/sd_config/node.yml

[root@server04 sd_config]# ll
总用量 8
-rw-r--r-- 1 root root 34 6月   8 22:09 node01.yml
-rw-r--r-- 1 root root 34 6月   8 22:12 node02.yml
[root@server04 sd_config]# cat node01.yml node02.yml 
- targets:
  - 192.168.1.221:9100
- targets:
  - 192.168.1.222:9100

 

 5、通过promSQL进行简单查询