/
consul.go
109 lines (93 loc) · 2.28 KB
/
consul.go
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package consul
import (
"context"
"net/url"
"strconv"
"github.com/duke-git/lancet/cryptor"
"github.com/google/wire"
consulApi "github.com/hashicorp/consul/api"
"github.com/pkg/errors"
"github.com/spf13/viper"
"google.golang.org/grpc/resolver"
)
// ProviderSet
var (
ProviderSet = wire.NewSet(NewClient, NewOptions)
)
func init() {
resolver.Register(NewBuilder())
}
// NewOptions
func NewOptions(v *viper.Viper) (*consulApi.Config, error) {
var (
err error
o = new(consulApi.Config)
)
if err = v.UnmarshalKey("consul", o); err != nil {
return nil, errors.Wrapf(err, "viper unmarshal consul options error")
}
return o, nil
}
// Client
type Client struct {
Config *consulApi.Config
Client *consulApi.Client
}
// NewClient
func NewClient(ctx context.Context, conf *consulApi.Config) (*Client, error) {
// initialize consul
var (
consulCli *consulApi.Client
err error
)
consulCli, err = consulApi.NewClient(conf)
if err != nil {
return nil, errors.Wrap(err, "create consul client error")
}
c := &Client{
Config: conf,
Client: consulCli,
}
return c, nil
}
// ServiceRegister
func (p *Client) ServiceRegister(ctx context.Context, service, addr string, tags []string, meta map[string]string) error {
u, err := url.Parse(addr)
if err != nil {
return err
}
check := &consulApi.AgentServiceCheck{
Interval: "10s",
DeregisterCriticalServiceAfter: "24h",
TCP: u.Host,
}
id := cryptor.Md5String(addr)
port, err := strconv.Atoi(u.Port())
if err != nil {
return err
}
svcReg := &consulApi.AgentServiceRegistration{
ID: id,
Name: service,
Tags: tags,
Port: port,
Address: u.Hostname(),
EnableTagOverride: true,
Check: check,
Checks: nil,
}
err = p.Client.Agent().ServiceRegister(svcReg)
if err != nil {
return err
}
return nil
}
// ServiceDeregister
func (p *Client) ServiceDeregister(ctx context.Context, service string) error {
return p.Client.Agent().ServiceDeregister(service)
}
// Resolver
func (p *Client) Resolver(ctx context.Context, service string, tags []string) (addr string, err error) {
r := newConsulResolver(service, tags, nil, p.Client, healthFilterOnlyHealthy)
return r.Resolver(ctx)
}