在公司内网，用了3台mac-mini来实验并记录如下:
n1(mac): 192.168.51.165 server mode n2(mac): 192.168.51.65 server mode with Consul Web UI n3(mac): 192.168.51.207 client mode n1 ./consul agent -server -bootstrap-expect 2 -data-dir /tmp/consul -node=n1 -bind=192.168.51.165 -dc=dc1 n2 ./consul agent -server -bootstrap-expect 2 -data-dir /tmp/consul -node=n2 -bind=192.168.51.65 -ui-dir ./dist -dc=dc1 n1 ./consul join 192.168.51.65 n2 ./consul leave n1的/tmp/consul/raft/peers.json ["192.168.51.165:8300"] n2的/tmp/consul/raft/peers.json null 我们打开n1和n2的/tmp/consul/raft/peers.json，将其内容统一修改为： ["192.168.51.65:8300","192.168.51.165:8300"] 注意:如果失败，需要在n1和n2上 rm /tmp/consul/raft/peers.json 否则 这个文件的内容为null 会导致rejoin失败 n2 ./consul agent -server -bootstrap-expect 2 -data-dir /tmp/consul -node=n2 -bind=192.168.51.65 -ui-dir ./dist -dc=dc1 -rejoin n1被选举为Leader ################################# 给cluster添加一个client ################################# n3 ./consul agent -data-dir /tmp/consul -node=n3 -bind=192.168.51.207 -dc=dc1 n3 作为client可加入Cluster的任一server(n1/n2都可以) ./consul join 192.168.51.65 ################################# 服务注册 ################################# n3 ./consul leave n3 新建配置文件 conf/web3.json { "service": { "name": "web3", "tags": ["master"], "address": "127.0.0.1", "port": 10000, "checks": [ { "http": "http://localhost:10000/health", "interval": "10s" } ] } } n3 ./consul agent -data-dir /tmp/consul -node=n3 -bind=192.168.51.207 -dc=dc1 -config-dir=./conf vi web3.go package main import ( "fmt" "net/http" ) func handler(w http.ResponseWriter, r *http.Request) { fmt.Println("hello Web3! This is n3") fmt.Fprintf(w, "Hello Web3! This is n3") } func healthHandler(w http.ResponseWriter, r *http.Request) { fmt.Println("health check!") } func main() { http.HandleFunc("/", handler) http.HandleFunc("/health", healthHandler) http.ListenAndServe(":10000", nil) } go run web3.go n2 跟n2一样新建web3.json 和 web3.go ./consul agent -server -bootstrap-expect 2 -data-dir /tmp/consul -node=n2 -bind=192.168.51.65 -ui-dir ./dist -dc=dc1 -rejoin -config-dir=./conf go run web3.go n1 dig @127.0.0.1 -p 8600 web3.service.consul SRV ################################# 服务发现 ################################# $go get github.com/miekg/dns $vi servicediscovery.go $go run servicediscovery.go n2.node.dc1.consul. – 192.168.51.65:10000 n3.node.dc1.consul. – 192.168.51.207:10000
