一、准备工作

1、下载consul

consul各版本下载地址，点击如下连接前往：

Consul Versions | HashiCorp Releases

本案例使用版本：Consul v1.15.0 ；下载的文件解压皆可，consul为可执行文件。

2、创建目录：

mkdir -p /picc/location/consul/node1/data

mkdir -p /picc/location/consul/node1/logs

mkdir -p /picc/location/consul/node2/data

mkdir -p /picc/location/consul/node2/logs

mkdir -p /picc/location/consul/node3/data

mkdir -p /picc/location/consul/node3/logs

二、单机集群部署

1、创建node1

创建配置文件basic.json 

cd /picc/location/consul/node1
touch basic.json
vi basic.json

{
    "datacenter":"dc1",
    "data_dir":"/picc/location/consul/node1/data",
    "log_level":"INFO",
    "server":true,
    "node_name":"node1",
    "ui_config":{
        "enabled":true
    },
    "bind_addr":"0.0.0.0",
    "client_addr":"0.0.0.0",
    "advertise_addr":"192.168.0.9",
    "bootstrap_expect":3,
    "ports":{
        "http":8500,
        "dns":8600,
        "grpc_tls":8503,
        "server":8300,
        "serf_lan":8301,
        "serf_wan":8302
    }
}

 启动脚本start.sh

#!/bin/bash
nohup ./consul agent -config-file=/picc/location/consul/node1/basic.json >/picc/location/consul/node1/consul.log  2>&1 &

2、node2

创建配置文件basic.json 

cd /picc/location/consul/node2
touch basic.json
vi basic.json

{
    "datacenter":"dc1",
    "data_dir":"/picc/location/consul/node2/data",
    "log_level":"INFO",
    "server":true,
    "node_name":"node2",
    "bind_addr":"0.0.0.0",
    "client_addr":"0.0.0.0",
    "advertise_addr":"192.168.0.9",
    "ports":{
        "http":8510,
        "dns":8610,
        "grpc_tls":8513,
        "server":8310,
        "serf_lan":8311,
        "serf_wan":8312
    }
}

  启动脚本start.sh

#!/bin/bash
nohup ./consul agent -config-file=/picc/location/consul/node2/basic.json  -retry-join=192.168.0.9:8301 > /picc/location/consul/node2/logs/consul.log 2>&1 &

 3、node3

创建配置文件basic.json 

cd /picc/location/consul/node3
touch basic.json
vi basic.json

{
    "datacenter":"dc1",
    "data_dir":"/picc/location/consul/node3/data",
    "log_level":"INFO",
    "server":true,
    "node_name":"node3",
    "bind_addr":"0.0.0.0",
    "client_addr":"0.0.0.0",
    "advertise_addr":"192.168.0.9",
    "ports":{
        "http":8520,
        "dns":8620,
        "grpc_tls":8523,
        "server":8320,
        "serf_lan":8321,
        "serf_wan":8322
    }
}

 启动脚本start.sh 

#!/bin/bash  
nohup ./consul agent -config-file=/picc/location/consul/node3/basic.json  -retry-join=192.168.0.9:8301 > /picc/location/consul/node3/logs/consul.log 2>&1 &

4、consul端口介绍

"ports" #端口

"http":  8500  #提供http服务的端口。

"grpc_tls":  8503  #consul1.14新添加，用于GRPC加密。

"dns":  8600  #提供dns服务的端口。

"server":  8300  #选取Leader节点（raft协议通信）和提供RPC调用时，consul节点之间的通信端口。

"serf_lan":  8301  #集群通信端口，用在LAN网。

"serf_wan":  8302  #数据中心通信端口，用在WAN网 。

 三、启动consul

分别执行node1、node2、node3下的脚本start.sh

./start.sh

 四、检查服务

./consul members -http-addr=192.168.0.9:8500

./consul info -http-addr=192.168.0.9:8500

打开浏览器录入url：http://192.168.0.9:8500检查集群节点