switch to go vendoring
This commit is contained in:
Michael Barz
+191
@@ -0,0 +1,191 @@
|
||||
|
||||
Apache License
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Version 2.0, January 2004
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http://www.apache.org/licenses/
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TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
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"control" means (i) the power, direct or indirect, to cause the
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Copyright 2015 Asim Aslam.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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See the License for the specific language governing permissions and
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limitations under the License.
|
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+423
@@ -0,0 +1,423 @@
|
||||
// Package etcd provides an etcd service registry
|
||||
package etcd
|
||||
|
||||
import (
|
||||
"context"
|
||||
"crypto/tls"
|
||||
"encoding/json"
|
||||
"errors"
|
||||
"net"
|
||||
"os"
|
||||
"path"
|
||||
"sort"
|
||||
"strings"
|
||||
"sync"
|
||||
"time"
|
||||
|
||||
hash "github.com/mitchellh/hashstructure"
|
||||
"go-micro.dev/v4/logger"
|
||||
"go-micro.dev/v4/registry"
|
||||
"go-micro.dev/v4/util/cmd"
|
||||
"go.etcd.io/etcd/api/v3/v3rpc/rpctypes"
|
||||
clientv3 "go.etcd.io/etcd/client/v3"
|
||||
"go.uber.org/zap"
|
||||
)
|
||||
|
||||
var (
|
||||
prefix = "/micro/registry/"
|
||||
)
|
||||
|
||||
type etcdRegistry struct {
|
||||
client *clientv3.Client
|
||||
options registry.Options
|
||||
|
||||
sync.RWMutex
|
||||
register map[string]uint64
|
||||
leases map[string]clientv3.LeaseID
|
||||
}
|
||||
|
||||
func init() {
|
||||
cmd.DefaultRegistries["etcd"] = NewRegistry
|
||||
}
|
||||
|
||||
func NewRegistry(opts ...registry.Option) registry.Registry {
|
||||
e := &etcdRegistry{
|
||||
options: registry.Options{},
|
||||
register: make(map[string]uint64),
|
||||
leases: make(map[string]clientv3.LeaseID),
|
||||
}
|
||||
username, password := os.Getenv("ETCD_USERNAME"), os.Getenv("ETCD_PASSWORD")
|
||||
if len(username) > 0 && len(password) > 0 {
|
||||
opts = append(opts, Auth(username, password))
|
||||
}
|
||||
address := os.Getenv("MICRO_REGISTRY_ADDRESS")
|
||||
if len(address) > 0 {
|
||||
opts = append(opts, registry.Addrs(address))
|
||||
}
|
||||
configure(e, opts...)
|
||||
return e
|
||||
}
|
||||
|
||||
func configure(e *etcdRegistry, opts ...registry.Option) error {
|
||||
config := clientv3.Config{
|
||||
Endpoints: []string{"127.0.0.1:2379"},
|
||||
}
|
||||
|
||||
for _, o := range opts {
|
||||
o(&e.options)
|
||||
}
|
||||
|
||||
if e.options.Timeout == 0 {
|
||||
e.options.Timeout = 5 * time.Second
|
||||
}
|
||||
|
||||
if e.options.Logger == nil {
|
||||
e.options.Logger = logger.DefaultLogger
|
||||
}
|
||||
|
||||
config.DialTimeout = e.options.Timeout
|
||||
|
||||
if e.options.Secure || e.options.TLSConfig != nil {
|
||||
tlsConfig := e.options.TLSConfig
|
||||
if tlsConfig == nil {
|
||||
tlsConfig = &tls.Config{
|
||||
InsecureSkipVerify: true,
|
||||
}
|
||||
}
|
||||
|
||||
config.TLS = tlsConfig
|
||||
}
|
||||
|
||||
if e.options.Context != nil {
|
||||
u, ok := e.options.Context.Value(authKey{}).(*authCreds)
|
||||
if ok {
|
||||
config.Username = u.Username
|
||||
config.Password = u.Password
|
||||
}
|
||||
cfg, ok := e.options.Context.Value(logConfigKey{}).(*zap.Config)
|
||||
if ok && cfg != nil {
|
||||
config.LogConfig = cfg
|
||||
}
|
||||
}
|
||||
|
||||
var cAddrs []string
|
||||
|
||||
for _, address := range e.options.Addrs {
|
||||
if len(address) == 0 {
|
||||
continue
|
||||
}
|
||||
addr, port, err := net.SplitHostPort(address)
|
||||
if ae, ok := err.(*net.AddrError); ok && ae.Err == "missing port in address" {
|
||||
port = "2379"
|
||||
addr = address
|
||||
cAddrs = append(cAddrs, net.JoinHostPort(addr, port))
|
||||
} else if err == nil {
|
||||
cAddrs = append(cAddrs, net.JoinHostPort(addr, port))
|
||||
}
|
||||
}
|
||||
|
||||
// if we got addrs then we'll update
|
||||
if len(cAddrs) > 0 {
|
||||
config.Endpoints = cAddrs
|
||||
}
|
||||
|
||||
cli, err := clientv3.New(config)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
e.client = cli
|
||||
return nil
|
||||
}
|
||||
|
||||
func encode(s *registry.Service) string {
|
||||
b, _ := json.Marshal(s)
|
||||
return string(b)
|
||||
}
|
||||
|
||||
func decode(ds []byte) *registry.Service {
|
||||
var s *registry.Service
|
||||
json.Unmarshal(ds, &s)
|
||||
return s
|
||||
}
|
||||
|
||||
func nodePath(s, id string) string {
|
||||
service := strings.Replace(s, "/", "-", -1)
|
||||
node := strings.Replace(id, "/", "-", -1)
|
||||
return path.Join(prefix, service, node)
|
||||
}
|
||||
|
||||
func servicePath(s string) string {
|
||||
return path.Join(prefix, strings.Replace(s, "/", "-", -1))
|
||||
}
|
||||
|
||||
func (e *etcdRegistry) Init(opts ...registry.Option) error {
|
||||
return configure(e, opts...)
|
||||
}
|
||||
|
||||
func (e *etcdRegistry) Options() registry.Options {
|
||||
return e.options
|
||||
}
|
||||
|
||||
func (e *etcdRegistry) registerNode(s *registry.Service, node *registry.Node, opts ...registry.RegisterOption) error {
|
||||
if len(s.Nodes) == 0 {
|
||||
return errors.New("Require at least one node")
|
||||
}
|
||||
|
||||
// check existing lease cache
|
||||
e.RLock()
|
||||
leaseID, ok := e.leases[s.Name+node.Id]
|
||||
e.RUnlock()
|
||||
|
||||
log := e.options.Logger
|
||||
|
||||
if !ok {
|
||||
// missing lease, check if the key exists
|
||||
ctx, cancel := context.WithTimeout(context.Background(), e.options.Timeout)
|
||||
defer cancel()
|
||||
|
||||
// look for the existing key
|
||||
rsp, err := e.client.Get(ctx, nodePath(s.Name, node.Id), clientv3.WithSerializable())
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
// get the existing lease
|
||||
for _, kv := range rsp.Kvs {
|
||||
if kv.Lease > 0 {
|
||||
leaseID = clientv3.LeaseID(kv.Lease)
|
||||
|
||||
// decode the existing node
|
||||
srv := decode(kv.Value)
|
||||
if srv == nil || len(srv.Nodes) == 0 {
|
||||
continue
|
||||
}
|
||||
|
||||
// create hash of service; uint64
|
||||
h, err := hash.Hash(srv.Nodes[0], nil)
|
||||
if err != nil {
|
||||
continue
|
||||
}
|
||||
|
||||
// save the info
|
||||
e.Lock()
|
||||
e.leases[s.Name+node.Id] = leaseID
|
||||
e.register[s.Name+node.Id] = h
|
||||
e.Unlock()
|
||||
|
||||
break
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
var leaseNotFound bool
|
||||
|
||||
// renew the lease if it exists
|
||||
if leaseID > 0 {
|
||||
log.Logf(logger.TraceLevel, "Renewing existing lease for %s %d", s.Name, leaseID)
|
||||
if _, err := e.client.KeepAliveOnce(context.TODO(), leaseID); err != nil {
|
||||
if err != rpctypes.ErrLeaseNotFound {
|
||||
return err
|
||||
}
|
||||
|
||||
log.Logf(logger.TraceLevel, "Lease not found for %s %d", s.Name, leaseID)
|
||||
// lease not found do register
|
||||
leaseNotFound = true
|
||||
}
|
||||
}
|
||||
|
||||
// create hash of service; uint64
|
||||
h, err := hash.Hash(node, nil)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
// get existing hash for the service node
|
||||
e.Lock()
|
||||
v, ok := e.register[s.Name+node.Id]
|
||||
e.Unlock()
|
||||
|
||||
// the service is unchanged, skip registering
|
||||
if ok && v == h && !leaseNotFound {
|
||||
log.Logf(logger.TraceLevel, "Service %s node %s unchanged skipping registration", s.Name, node.Id)
|
||||
return nil
|
||||
}
|
||||
|
||||
service := ®istry.Service{
|
||||
Name: s.Name,
|
||||
Version: s.Version,
|
||||
Metadata: s.Metadata,
|
||||
Endpoints: s.Endpoints,
|
||||
Nodes: []*registry.Node{node},
|
||||
}
|
||||
|
||||
var options registry.RegisterOptions
|
||||
for _, o := range opts {
|
||||
o(&options)
|
||||
}
|
||||
|
||||
ctx, cancel := context.WithTimeout(context.Background(), e.options.Timeout)
|
||||
defer cancel()
|
||||
|
||||
var lgr *clientv3.LeaseGrantResponse
|
||||
if options.TTL.Seconds() > 0 {
|
||||
// get a lease used to expire keys since we have a ttl
|
||||
lgr, err = e.client.Grant(ctx, int64(options.TTL.Seconds()))
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
}
|
||||
|
||||
log.Logf(logger.TraceLevel, "Registering %s id %s with lease %v and leaseID %v and ttl %v", service.Name, node.Id, lgr, lgr.ID, options.TTL)
|
||||
// create an entry for the node
|
||||
if lgr != nil {
|
||||
_, err = e.client.Put(ctx, nodePath(service.Name, node.Id), encode(service), clientv3.WithLease(lgr.ID))
|
||||
} else {
|
||||
_, err = e.client.Put(ctx, nodePath(service.Name, node.Id), encode(service))
|
||||
}
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
e.Lock()
|
||||
// save our hash of the service
|
||||
e.register[s.Name+node.Id] = h
|
||||
// save our leaseID of the service
|
||||
if lgr != nil {
|
||||
e.leases[s.Name+node.Id] = lgr.ID
|
||||
}
|
||||
e.Unlock()
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
func (e *etcdRegistry) Deregister(s *registry.Service, opts ...registry.DeregisterOption) error {
|
||||
if len(s.Nodes) == 0 {
|
||||
return errors.New("Require at least one node")
|
||||
}
|
||||
|
||||
for _, node := range s.Nodes {
|
||||
e.Lock()
|
||||
// delete our hash of the service
|
||||
delete(e.register, s.Name+node.Id)
|
||||
// delete our lease of the service
|
||||
delete(e.leases, s.Name+node.Id)
|
||||
e.Unlock()
|
||||
|
||||
ctx, cancel := context.WithTimeout(context.Background(), e.options.Timeout)
|
||||
defer cancel()
|
||||
|
||||
e.options.Logger.Logf(logger.TraceLevel, "Deregistering %s id %s", s.Name, node.Id)
|
||||
_, err := e.client.Delete(ctx, nodePath(s.Name, node.Id))
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
}
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
func (e *etcdRegistry) Register(s *registry.Service, opts ...registry.RegisterOption) error {
|
||||
if len(s.Nodes) == 0 {
|
||||
return errors.New("Require at least one node")
|
||||
}
|
||||
|
||||
var gerr error
|
||||
|
||||
// register each node individually
|
||||
for _, node := range s.Nodes {
|
||||
err := e.registerNode(s, node, opts...)
|
||||
if err != nil {
|
||||
gerr = err
|
||||
}
|
||||
}
|
||||
|
||||
return gerr
|
||||
}
|
||||
|
||||
func (e *etcdRegistry) GetService(name string, opts ...registry.GetOption) ([]*registry.Service, error) {
|
||||
ctx, cancel := context.WithTimeout(context.Background(), e.options.Timeout)
|
||||
defer cancel()
|
||||
|
||||
rsp, err := e.client.Get(ctx, servicePath(name)+"/", clientv3.WithPrefix(), clientv3.WithSerializable())
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
if len(rsp.Kvs) == 0 {
|
||||
return nil, registry.ErrNotFound
|
||||
}
|
||||
|
||||
serviceMap := map[string]*registry.Service{}
|
||||
|
||||
for _, n := range rsp.Kvs {
|
||||
if sn := decode(n.Value); sn != nil {
|
||||
s, ok := serviceMap[sn.Version]
|
||||
if !ok {
|
||||
s = ®istry.Service{
|
||||
Name: sn.Name,
|
||||
Version: sn.Version,
|
||||
Metadata: sn.Metadata,
|
||||
Endpoints: sn.Endpoints,
|
||||
}
|
||||
serviceMap[s.Version] = s
|
||||
}
|
||||
|
||||
s.Nodes = append(s.Nodes, sn.Nodes...)
|
||||
}
|
||||
}
|
||||
|
||||
services := make([]*registry.Service, 0, len(serviceMap))
|
||||
for _, service := range serviceMap {
|
||||
services = append(services, service)
|
||||
}
|
||||
|
||||
return services, nil
|
||||
}
|
||||
|
||||
func (e *etcdRegistry) ListServices(opts ...registry.ListOption) ([]*registry.Service, error) {
|
||||
versions := make(map[string]*registry.Service)
|
||||
|
||||
ctx, cancel := context.WithTimeout(context.Background(), e.options.Timeout)
|
||||
defer cancel()
|
||||
|
||||
rsp, err := e.client.Get(ctx, prefix, clientv3.WithPrefix(), clientv3.WithSerializable())
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
if len(rsp.Kvs) == 0 {
|
||||
return []*registry.Service{}, nil
|
||||
}
|
||||
|
||||
for _, n := range rsp.Kvs {
|
||||
sn := decode(n.Value)
|
||||
if sn == nil {
|
||||
continue
|
||||
}
|
||||
v, ok := versions[sn.Name+sn.Version]
|
||||
if !ok {
|
||||
versions[sn.Name+sn.Version] = sn
|
||||
continue
|
||||
}
|
||||
// append to service:version nodes
|
||||
v.Nodes = append(v.Nodes, sn.Nodes...)
|
||||
}
|
||||
|
||||
services := make([]*registry.Service, 0, len(versions))
|
||||
for _, service := range versions {
|
||||
services = append(services, service)
|
||||
}
|
||||
|
||||
// sort the services
|
||||
sort.Slice(services, func(i, j int) bool { return services[i].Name < services[j].Name })
|
||||
|
||||
return services, nil
|
||||
}
|
||||
|
||||
func (e *etcdRegistry) Watch(opts ...registry.WatchOption) (registry.Watcher, error) {
|
||||
return newEtcdWatcher(e, e.options.Timeout, opts...)
|
||||
}
|
||||
|
||||
func (e *etcdRegistry) String() string {
|
||||
return "etcd"
|
||||
}
|
||||
+37
@@ -0,0 +1,37 @@
|
||||
package etcd
|
||||
|
||||
import (
|
||||
"context"
|
||||
|
||||
"go-micro.dev/v4/registry"
|
||||
"go.uber.org/zap"
|
||||
)
|
||||
|
||||
type authKey struct{}
|
||||
|
||||
type logConfigKey struct{}
|
||||
|
||||
type authCreds struct {
|
||||
Username string
|
||||
Password string
|
||||
}
|
||||
|
||||
// Auth allows you to specify username/password.
|
||||
func Auth(username, password string) registry.Option {
|
||||
return func(o *registry.Options) {
|
||||
if o.Context == nil {
|
||||
o.Context = context.Background()
|
||||
}
|
||||
o.Context = context.WithValue(o.Context, authKey{}, &authCreds{Username: username, Password: password})
|
||||
}
|
||||
}
|
||||
|
||||
// LogConfig allows you to set etcd log config.
|
||||
func LogConfig(config *zap.Config) registry.Option {
|
||||
return func(o *registry.Options) {
|
||||
if o.Context == nil {
|
||||
o.Context = context.Background()
|
||||
}
|
||||
o.Context = context.WithValue(o.Context, logConfigKey{}, config)
|
||||
}
|
||||
}
|
||||
+91
@@ -0,0 +1,91 @@
|
||||
package etcd
|
||||
|
||||
import (
|
||||
"context"
|
||||
"errors"
|
||||
"time"
|
||||
|
||||
"go-micro.dev/v4/registry"
|
||||
clientv3 "go.etcd.io/etcd/client/v3"
|
||||
)
|
||||
|
||||
type etcdWatcher struct {
|
||||
stop chan bool
|
||||
w clientv3.WatchChan
|
||||
client *clientv3.Client
|
||||
timeout time.Duration
|
||||
}
|
||||
|
||||
func newEtcdWatcher(r *etcdRegistry, timeout time.Duration, opts ...registry.WatchOption) (registry.Watcher, error) {
|
||||
var wo registry.WatchOptions
|
||||
for _, o := range opts {
|
||||
o(&wo)
|
||||
}
|
||||
|
||||
ctx, cancel := context.WithCancel(context.Background())
|
||||
stop := make(chan bool, 1)
|
||||
|
||||
go func() {
|
||||
<-stop
|
||||
cancel()
|
||||
}()
|
||||
|
||||
watchPath := prefix
|
||||
if len(wo.Service) > 0 {
|
||||
watchPath = servicePath(wo.Service) + "/"
|
||||
}
|
||||
|
||||
return &etcdWatcher{
|
||||
stop: stop,
|
||||
w: r.client.Watch(ctx, watchPath, clientv3.WithPrefix(), clientv3.WithPrevKV()),
|
||||
client: r.client,
|
||||
timeout: timeout,
|
||||
}, nil
|
||||
}
|
||||
|
||||
func (ew *etcdWatcher) Next() (*registry.Result, error) {
|
||||
for wresp := range ew.w {
|
||||
if wresp.Err() != nil {
|
||||
return nil, wresp.Err()
|
||||
}
|
||||
if wresp.Canceled {
|
||||
return nil, errors.New("could not get next")
|
||||
}
|
||||
for _, ev := range wresp.Events {
|
||||
service := decode(ev.Kv.Value)
|
||||
var action string
|
||||
|
||||
switch ev.Type {
|
||||
case clientv3.EventTypePut:
|
||||
if ev.IsCreate() {
|
||||
action = "create"
|
||||
} else if ev.IsModify() {
|
||||
action = "update"
|
||||
}
|
||||
case clientv3.EventTypeDelete:
|
||||
action = "delete"
|
||||
|
||||
// get service from prevKv
|
||||
service = decode(ev.PrevKv.Value)
|
||||
}
|
||||
|
||||
if service == nil {
|
||||
continue
|
||||
}
|
||||
return ®istry.Result{
|
||||
Action: action,
|
||||
Service: service,
|
||||
}, nil
|
||||
}
|
||||
}
|
||||
return nil, errors.New("could not get next")
|
||||
}
|
||||
|
||||
func (ew *etcdWatcher) Stop() {
|
||||
select {
|
||||
case <-ew.stop:
|
||||
return
|
||||
default:
|
||||
close(ew.stop)
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user