1 环境准备
Centos7/CPU：2核+/内存：8G+/磁盘：50G+
1. 1 机器环境
| 节点hostname | 作用 | IP |
|---|---|---|
| cmaster | master | 192.168.8.124 |
| cnode1 | node1 | 192.168.8.125 |
| cnode2 | node2 | 192.168.8.126 |
1.2 hostname
[root@base1 ~]# hostnamectl set-hostname cmaster --static
[root@base2 ~]# hostnamectl set-hostname cnode1 --static
[root@base3 ~]# hostnamectl set-hostname cnode2 --static
1.3 网络设置
[root@base1 ~]# vi /etc/sysconfig/network-scripts/ifcfg-ens33
BOOTPROTO="static" #dhcp改为static
ONBOOT="yes" #开机启用本配置
IPADDR=192.168.8.124 #静态IP 192.168.8.125/192.168.8.126
GATEWAY=192.168.8.2 #默认网关
NETMASK=255.255.255.0 #子网掩码
DNS1=114.114.114.114 #DNS 配置
DNS2=8.8.8.8 #DNS 配置
$# reboot
1.4 查看主机名
hostname
1.5 配置IP host映射关系
echo "192.168.8.124 cmaster.local.com" >> /etc/hosts
echo "192.168.8.125 cnode1.local.com" >> /etc/hosts
echo "192.168.8.126 cnode2.local.com" >> /etc/hosts
1.6 安装依赖
$ yum install -y conntrack ntpdate ntp ipvsadm ipset jq iptables curl sysstatlibseccomp wget vim net-tools git iproute lrzsz bash-completion tree bridge-utils unzip bind-utils gcc
2 安装Consul
2.1 下载二进制包
$ wget https://releases.hashicorp.com/consul/1.9.1/consul_1.9.1_linux_amd64.zip
$ unzip consul_1.9.1_linux_amd64.zip -d /usr/local/bin
2.2 环境配置
$ vi /etc/profile
$ export CONSUL_HOME=/usr/local/bin/consul
$ export PATH=$PATH:CONSUL_HOME
// 使用环境变量配置生效
$ source /etc/profile
2.3 验证安装结果
$ consul --version
Consul v1.9.1
Revision ca5c38943
Protocol 2 spoken by default, understands 2 to 3 (agent will automatically use protocol >2 when speaking to compatible agents)
2.4 防火墙
$ systemctl stop firewalld && systemctl disable firewalld
# 置空iptables
$ yum -y install iptables-services && systemctl start iptables && systemctl enable iptables && iptables -F && service iptables save
至此为止，可以关闭cmaster，然后进行克隆后设置下1.2，1.3
3 搭建Consul集群
3.1 建立Master
$ consul agent -server -ui -bootstrap-expect=3 -data-dir=/data/consul -node=agent-1 -client=0.0.0.0 -log-file=/usr/service/log/consul_log-$(date +%Y-%m-%d--%H-%M) -bind=192.168.8.124 -datacenter=dc1
3.2 Node1
$ consul agent -server -ui -bootstrap-expect=3 -data-dir=/data/consul -node=agent-2 -client=0.0.0.0 -log-file=/usr/service/log/consul_log-$(date +%Y-%m-%d--%H-%M) -bind=192.168.8.125 -datacenter=dc1 -join 192.168.8.124
3.3 Node2
$ consul agent -server -ui -bootstrap-expect=3 -data-dir=/data/consul -node=agent-3 -client=0.0.0.0 -log-file=/usr/service/log/consul_log-$(date +%Y-%m-%d--%H-%M) -bind=192.168.8.126 -datacenter=dc1 -join 192.168.8.124
3.4 查看启动结果
$ consul members
Node Address Status Type Build Protocol DC Segment
agent-1 192.168.8.124:8301 alive server 1.9.1 2 dc1 <all>
agent-2 192.168.8.125:8301 alive server 1.9.1 2 dc1 <all>
agent-3 192.168.8.126:8301 alive server 1.9.1 2 dc1 <all>
3.5 停止agent服务
[root@cnode2 ~]# consul leave
Graceful leave complete
$ consul members
Node Address Status Type Build Protocol DC Segment
agent-1 192.168.8.124:8301 alive server 1.9.1 2 dc1 <all>
agent-2 192.168.8.125:8301 alive server 1.9.1 2 dc1 <all>
agent-3 192.168.8.126:8301 left server 1.9.1 2 dc1 <all>
4 访问Consul的WebUI控制台
如果想和Kubernetes集成，官方建议采用Helm方式
