一.部署环境
* InfluxDB集群节点数：mate服务至少3个节点，节点数越多，集群性能越高。
* 操作系统：支持的操作系统包括Linux、Windows和MacOS。
* CPU：至少2核4线程，主频越高越好。
* 内存：至少8GB内存，推荐16GB或以上。
* 存储：至少100GB的磁盘空间，推荐使用SSD或NVMe SSD存储
二.集群文件配置修改
|-----------------|---------------|
| ip地址 | 服务名称 |
| 192.168.110.110 | influxdb,meta |
| 192.168.110.111 | influxdb,meta |
| 192.168.110.118 | meta |
1.influxdb-meta.conf配置文件修改
meta至少三个节点修改配置比较简单
hostname = "192.168.110.110"
dir = "/data/var/lib/influxdb/meta"
hostname = "192.168.110.111"
dir = "/data/var/lib/influxdb/meta"
hostname = "192.168.110.118"
dir = "/data/var/lib/influxdb/meta"
2.influxdb.conf配置修改：红色为修改参数
influxdb-mate.conf每台只需要修改下面参数
hostname = "192.168.110.110"
[meta].
dir = "/data/var/lib/influxdb/meta"
第一个influx的配置influxdb.conf修改
hostname = "192.168.110.110"
[meta]
Directory where the cluster metadata is stored.
dir = "/data/var/lib/influxdb/meta"
[data]
dir = "/data/var/lib/influxdb/data"
wal-dir = "/data/var/lib/influxdb/wal"
wal-fsync-delay = "1ms"
index-version = "tsi1"
cache-max-memory-size = "48g"
cache-snapshot-memory-size = "4096m"
max-concurrent-compactions = 12
series-id-set-cache-size = 100
[coordinator]
max-select-point = 1000000
max-select-series = 1000000
[hinted-handoff]
The directory where the hinted handoff queues are stored.
dir = "/data/var/lib/influxdb/hh"
第二个influx的配置influxdb.conf修改
hostname = "192.168.110.111"
[meta]
Directory where the cluster metadata is stored.
dir = "/data/var/lib/influxdb/meta"
[data]
dir = "/data/var/lib/influxdb/data"
wal-dir = "/data/var/lib/influxdb/wal"
wal-fsync-delay = "1ms"
index-version = "tsi1"
cache-max-memory-size = "48g"
cache-snapshot-memory-size = "4096m"
max-concurrent-compactions = 12
series-id-set-cache-size = 100
[coordinator]
max-select-point = 1000000
max-select-series = 1000000
[hinted-handoff]
The directory where the hinted handoff queues are stored.
dir = "/data/var/lib/influxdb/hh"
三.集群构建启动
1.meta元数据集群的构建
启动meta集群（所有的mate节点上执行）
nohup influxd-meta -config /data/influxdb/etc/influxdb/influxdb-meta.conf > nohup.out 2>&1 &
在其中一个节点上执行
influxd-ctl add-meta 192.168.110.110:8091 influxd-ctl add-meta 192.168.110.111:8091 influxd-ctl add-meta 192.168.110.88:8091
2.influxdb集群服务
启动data服务（所有influx的数据节点上执行）
nohup influxd -config /data/influxdb/etc/influxdb/influxdb.conf > nohup.out 2>&1 &
将data节点加入集群（其中一个data节点上）
influxd-ctl add-data 192.168.10.110:8088 influxd-ctl add-data 192.168.10.111:8088
四.配置负载均衡
nginx配置参数如下
#user nobody;
worker_processes 1;
#error_log logs/error.log;
#error_log logs/error.log notice;
#error_log logs/error.log info;
#pid logs/nginx.pid;
events {
worker_connections 1024;
}
http {
include mime.types;
default_type application/octet-stream;
#log_format main '$remote_addr - remote_user \[time_local] "$request" '
'$status body_bytes_sent "http_referer" '
'"http_user_agent" "http_x_forwarded_for"';
#access_log logs/access.log main;
sendfile on;
#tcp_nopush on;
#keepalive_timeout 0;
keepalive_timeout 65;
#gzip on;
upstream influxdb {
server 192.168.110.110:8086;
server 192.168.110.111:8086;
}
server {
listen 8181;
server_name localhost;
#charset koi8-r;
#access_log logs/host.access.log main;
location / {
proxy_set_header Host $proxy_host;
proxy_pass http://influxdb/;
}
error_page 500 502 503 504 /50x.html;
location = /50x.html {
root html;
}
}
}
负载均衡测试
数据测试写入
curl -i -XPOST 'http://192.168.110.110:8181/influx/write?db=test' --data-binary 'mymeasurement,mytag=1 myfield=90'
数据查询
curl -XPOST "http://192.168.10.110:8181/influx/query?db=test" --data-urlencode "q=Select * from mymeasurement" --header "Authorization: Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJ1c2VybmFtZSI6ImFkbWluIiwiZXhwIjoxNjc5NjQyNTEyfQ.7mIPMjB60kFGFQuTSyf7KvYF921MkMmL662_icTfvRQ"
五.命令手册
influxd-meta config 显示所有meta的配置
influxd config 显示所有influxdata的配置
influx-ctl show 显示集群节点
create database iot_env_data
创建用户设置密码
create user iot_admin with password 'xxx1' with all privileges