consul 多节点/单节点集群搭建
三节点配置
- 下载安装包
mkdir /data/consul
mkdir /data/consul/data
curl -SLO https://github.com/consul/1.9.5/consul_1.9.5_linux_amd64.zip
unzip consul_1.9.5_linux_amd64.zip
mv consul /data/consul/
- 创建配置文件
生成集群密钥
/data/consul/consul keygen
# XYefgTnef1tB/X6Q3gVOfx2XlTbfbwvNzG0KLQMm1/s=
vim /data/consul/config.json
{
"bootstrap_expect": 3,
"client_addr": "0.0.0.0",
"bind_addr": "{{GetInterfaceIP \"eth0\"}}",
"datacenter": "lmtce",
"data_dir": "/data/consul/data",
"domain": "consul",
"enable_script_checks": true,
"dns_config": {
"enable_truncate": true,
"only_passing": true
},
"enable_syslog": true,
"encrypt": "P+8L7Z3K6ItXsvS9moNWlvnuYuT136tVVInmzsOxEVc=",
"leave_on_terminate": true,
"log_level": "INFO",
"rejoin_after_leave": true,
"server": true,
"start_join": [
"192.168.100.11",
"192.168.100.12",
"192.168.100.13"
],
"ui": true
}
注意修改 start_join
里面的节点 ip;如果节点有多个网卡,还要使用 bind_addr
指令将端口监听到具体的网卡上。
网卡名只能使用双引号引用并转义,不能使用单引号。
- 创建systemd启动文件
vim /usr/lib/systemd/system/consul.service
[Unit]
Description=Consul Startup process
After=network.target
[Service]
User=worker
Type=simple
ExecStart=/data/consul/consul agent -server -config-dir /data/consul
TimeoutStartSec=0
[Install]
WantedBy=default.target
- 启动服务
注意,由于是集群节点,当只启动一个节点时,服务状态是 error 的,这个不用担心,等其他两个节点启动起来就好了。
chown -R worker. /data
systemctl daemon-reload
systemctl restart consul
三个节点要重复执行上述配置。
单节点配置
{
"bootstrap_expect": 1,
"client_addr": "0.0.0.0",
"bind_addr": "{{GetInterfaceIP \"eth0\"}}",
"datacenter": "sloan",
"data_dir": "/data/consul/data",
"domain": "consul",
"enable_script_checks": true,
"dns_config": {
"enable_truncate": true,
"only_passing": true
},
"enable_syslog": true,
"encrypt": "XYefgTnef1tB/X6Q3gVOfx2XlTbfbwvNzG0KLQMm1/s=",
"leave_on_terminate": true,
"log_level": "INFO",
"rejoin_after_leave": true,
"server": true,
"start_join": [
"192.168.100.11"
],
"ui": true
}
注意 bootstrap_expect
为1 ,并且start_join
只有1个节点。