docker: influxDb + telegraf + gr

名称
influxDb	时序数据库
telegraf	数据采集agent

使用 telegraf 采集数据写入 influxDb 中存储,然后通过grafana展示成BI报表

1.influxDb 在 docker下的安装

• docker-compose.yml

version: '2'
services:
  influxdb:
    image: tutum/influxdb:latest
    container_name: influxdb
    volumes:
      - /opt/influxdb/conf:/etc/influxdb
      - /opt/influxdb/data:/var/lib/influxdb
      - /etc/localtime:/etc/localtime
    ports:
      - "8086:8086"
      - "8083:8083"
    restart: always
    environment:
      - ADMIN_USER="root"
      - INFLUXDB_INIT_PWD="123456"
      - PRE_CREATE_DB="telegraf"

• 由镜像生成容器运行

docker-compost up -d

• 测试

访问 IP:8083 可访问influxDb的web界面

image.png

或者使用命令访问
root@xxxx:/opt/influxdb# docker exec -it influxdb bash
root@7823c55b1e4f:/# influx
Visit https://enterprise.influxdata.com to register for updates, InfluxDB server management, and monitoring.
Connected to http://localhost:8086 version 1.0.0
InfluxDB shell version: 1.0.0
> show databases
name: databases
---------------
name
_internal
telegraf

> show users
user    admin
root    true

> use telegraf
Using database telegraf
> SHOW MEASUREMENTS
name: measurements
------------------
name
cpu
disk
diskio
kernel
mem
processes
swap
system

> select * from cpu limit 5
name: cpu
---------
time            cpu     host            usage_guest usage_guest_nice    usage_idle      usage_iowait        usage_irq   usage_nice  usage_softirq       usage_steal usage_system        usage_user
1605171380000000000 cpu-total   iZ8vbealpwhng8ovp3fyz6Z 0       0           97.14141158872732   0.025297242601537845    0       0       0.050594485201925304    0       1.188970402249271   1.5937262838738766
1605171380000000000 cpu3        iZ8vbealpwhng8ovp3fyz6Z 0       0           97.77777778039092   0.10101010101153356 0       0       0.10101010101153356 0       1.0101010101325607  1.0101010101325607
1605171380000000000 cpu1        iZ8vbealpwhng8ovp3fyz6Z 0       0           98.09045226190388   0           0       0       0           0       1.0050251255947016  0.9045226130498564
1605171380000000000 cpu0        iZ8vbealpwhng8ovp3fyz6Z 0       0           96.73802242782325   0           0       0       0           0       1.325178389401408   1.9367991845183081
1605171380000000000 cpu2        iZ8vbealpwhng8ovp3fyz6Z 0       0           96.34146341590379   0           0       0       0           0       1.321138211375501   2.337398373977728

2.telegraf的安装和启动 - 非docker模式

安装启动

mkdir /downloads
cd /downloads
wget https://dl.influxdata.com/telegraf/releases/telegraf_1.12.1-1_amd64.deb
dpkg -i telegraf_1.12.1-1_amd64.deb
systemctl enable --now telegraf
systemctl status telegraf
启动成功后 telegraf 就会默默的写入cpu,disk等信息到influxdb中

查telegraf 状态

root@xxx:/# telegraf status
2020-11-12T09:34:48Z I! Starting Telegraf 1.12.1
2020-11-12T09:34:48Z I! Using config file: /etc/telegraf/telegraf.conf
2020-11-12T09:34:48Z I! Loaded inputs: cpu disk diskio kernel mem processes swap system
2020-11-12T09:34:48Z I! Loaded aggregators: 
2020-11-12T09:34:48Z I! Loaded processors: 
2020-11-12T09:34:48Z I! Loaded outputs: influxdb
2020-11-12T09:34:48Z I! Tags enabled: host=iZ8vbealpwhng8ovp3fyz6Z
2020-11-12T09:34:48Z I! [agent] Config: Interval:10s, Quiet:false, Hostname:"xxx", Flush Interval:10s
^C2020-11-12T09:34:52Z I! [agent] Hang on, flushing any cached metrics before shutdown

由上可知配置文件为 /etc/telegraf/telegraf.conf ,有其他操作可修改配置文件

3.最后用grafana展示influxDb中的数据

如果需要在docker中安装grafana请参考 : https://www.jianshu.com/p/87e1ca5b84c9

• 下图为在grafana中的explore模块查找influxDb中的数据做出的时序报表

image.png