79 lines
2.0 KiB
Go
79 lines
2.0 KiB
Go
package consul
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import (
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"context"
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"errors"
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"fmt"
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"net"
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"github.com/gogf/gf/contrib/registry/consul/v2"
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"github.com/gogf/gf/v2/frame/g"
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"github.com/gogf/gf/v2/net/gsel"
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"github.com/gogf/gf/v2/net/gsvc"
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"github.com/gogf/gf/v2/util/grand"
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)
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func init() {
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consulAddr := g.Cfg().MustGet(context.Background(), "consul.address").String()
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registry, err := consul.New(consul.WithAddress(consulAddr))
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if err != nil {
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panic(err)
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}
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gsvc.SetRegistry(registry)
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gsel.SetBuilder(gsel.NewBuilderRoundRobin())
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}
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func getLocalIP() (string, error) {
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// 获取本机所有网络接口
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addrs, err := net.InterfaceAddrs()
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if err != nil {
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return "", err
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}
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for _, addr := range addrs {
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// 检查是否是IP地址
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if ipNet, ok := addr.(*net.IPNet); ok && !ipNet.IP.IsLoopback() {
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if ipNet.IP.To4() != nil {
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// 返回第一个非回环的IPv4地址
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return ipNet.IP.String(), nil
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}
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}
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}
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return "", fmt.Errorf("无法找到本地IP地址")
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}
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func getInstanceAddrByIp(ctx context.Context, ip string, services []gsvc.Service) (addr string) {
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for _, s := range services {
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if s.GetEndpoints()[0].Host() == addr {
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addr = s.GetEndpoints()[0].String()
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return
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}
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}
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return
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}
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func GetInstanceAddr(ctx context.Context, name string) (addr string, err error) {
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watch, err := gsvc.GetRegistry().Watch(ctx, name)
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service, err := watch.Proceed()
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if err != nil || service == nil {
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err = errors.New("获取customerService服务实例失败！")
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return
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}
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//优先使用客户端IP获取实例(前后端在同一台机器调试)
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addr = getInstanceAddrByIp(ctx, g.RequestFromCtx(ctx).GetRemoteIp(), service)
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if !g.IsEmpty(addr) {
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return
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}
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//优先使用gateway同IP的服务实例(前后端不同机器调试)
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addr, err = getLocalIP()
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if err != nil {
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return
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}
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addr = getInstanceAddrByIp(ctx, addr, service)
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if !g.IsEmpty(addr) {
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return
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}
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//随机获取一个服务实例
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maxService := grand.N(0, len(service)-1)
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addr = service[maxService].GetEndpoints()[0].String()
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return
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}
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