1、基础知识

1.1、官方文档

https://docs.influxdata.com/influxdb/v1.8/supported_protocols/prometh

1.2、需求

需把要prometheus数据存到其他远程服务器上

2、Influxdb部署

2.1、配置yum源

cat <<EOF | sudo tee /etc/yum.repos.d/influxdb.repo
[influxdb]
name = InfluxDB Repository - RHEL \$releasever
baseurl = https://repos.influxdata.com/rhel/\$releasever/\$basearch/stable
enabled = 1
gpgcheck = 0
EOF

2.2、安装Influxdb

yum install influxdb -y

2.3、启动Influxdb服务

2.3.1、启动

systemctl start influxdb
systemctl enable influxdb

2.3.2、查询运行状态

]# netstat  -tunlp | grep influxd
tcp        0      0 127.0.0.1:8088          0.0.0.0:*               LISTEN      29082/influxd       
tcp6       0      0 :::8086                 :::*                    LISTEN      29082/influxd 

2.4、创建 prometheus 数据库

]# influx
Connected to http://localhost:8086 version 1.8.10
InfluxDB shell version: 1.8.10
> create database prometheus;
> show databases;
name: databases
name
----
_internal
prometheus

2.5、修改prometheus启动脚本

2.5.1、创建存放的数据的目录

mkdir -p /usr/local/prometheus/data

2.5.2、修改prometheus.service

]# cat /usr/lib/systemd/system/prometheus.service
[Unit]
Description=prometheus server project
After=network.target
[Service]
Type=simple
ExecStart=/data/server/prometheus/bin/prometheus \
--config.file=/data/server/prometheus/etc/prometheus.yml \
--storage.tsdb.path=/usr/local/prometheus/data # 修改这里的数据目录
Restart=on-failure
[Install]
WantedBy=multi-user.target

# 修改服务脚本，需要重新加载一下
systemctl daemon-reload

2.6、配置 prometheus.yaml【添加远程读写】

2.6.1、配置

]# vi /data/server/prometheus/etc/prometheus.yml
scrape_configs:
  - job_name: "prometheus"
    static_configs:
      - targets: ["localhost:9090"]

remote_write:
  - url: "http://192.168.10.34:8086/api/v1/prom/write?db=prometheus"
remote_read:
  - url: "http://192.168.10.34:8086/api/v1/prom/read?db=prometheus"

2.6.2、检查语法

]# promtool check config /data/server/prometheus/etc/prometheus.yml 
Checking /data/server/prometheus/etc/prometheus.yml
  SUCCESS: 1 rule files found
 SUCCESS: /data/server/prometheus/etc/prometheus.yml is valid prometheus config file syntax

Checking /data/server/prometheus/rules/metrics_request_rules.yaml
  SUCCESS: 2 rules found

2.6.3、重启prometheus服务

systemctl restart prometheus

2.7、登陆Influxdb查询

2.7.1、登陆数据库

]# influx
Connected to http://localhost:8086 version 1.8.10
InfluxDB shell version: 1.8.10
> use prometheus
Using database prometheus

2.7.2、查询监控项

> show measurements
...
promhttp_metric_handler_requests_total
scrape_duration_seconds
scrape_samples_post_metric_relabeling
scrape_samples_scraped
scrape_series_added
up

2.7.3、查询监控的数据

> select * from prometheus_http_requests_total limit 5;
name: prometheus_http_requests_total
time                __name__                       code handler  instance       job        value
----                --------                       ---- -------  --------       ---        -----
1681271646440000000 prometheus_http_requests_total 200  /metrics localhost:9090 prometheus 1
1681271661440000000 prometheus_http_requests_total 200  /metrics localhost:9090 prometheus 2
1681271676440000000 prometheus_http_requests_total 200  /metrics localhost:9090 prometheus 3
1681271691440000000 prometheus_http_requests_total 200  /metrics localhost:9090 prometheus 4
1681271706440000000 prometheus_http_requests_total 200  /metrics localhost:9090 prometheus 5

2.8、数据库已经变更成功

]# ll /usr/local/prometheus/data/
总用量 20
drwxr-xr-x 2 root root     6 4月  12 11:53 chunks_head
-rw-r--r-- 1 root root     0 4月  12 11:53 lock
-rw-r--r-- 1 root root 20001 4月  12 11:57 queries.active
drwxr-xr-x 2 root root    22 4月  12 11:53 wal