Embedded NATS Broker (#1110)
* if the address is produced by a default route don't hash it * embedded nats * fix url parsing * don't override help * add ready flag
This commit is contained in:
parent
b699d969e4
commit
1d311ab457
@ -106,8 +106,9 @@ func newTransport(config *tls.Config) *http.Transport {
|
||||
|
||||
func newHttpBroker(opts ...Option) Broker {
|
||||
options := Options{
|
||||
Codec: json.Marshaler{},
|
||||
Context: context.TODO(),
|
||||
Codec: json.Marshaler{},
|
||||
Context: context.TODO(),
|
||||
Registry: registry.DefaultRegistry,
|
||||
}
|
||||
|
||||
for _, o := range opts {
|
||||
@ -120,17 +121,11 @@ func newHttpBroker(opts ...Option) Broker {
|
||||
addr = options.Addrs[0]
|
||||
}
|
||||
|
||||
// get registry
|
||||
reg, ok := options.Context.Value(registryKey).(registry.Registry)
|
||||
if !ok {
|
||||
reg = registry.DefaultRegistry
|
||||
}
|
||||
|
||||
h := &httpBroker{
|
||||
id: uuid.New().String(),
|
||||
address: addr,
|
||||
opts: options,
|
||||
r: reg,
|
||||
r: options.Registry,
|
||||
c: &http.Client{Transport: newTransport(options.TLSConfig)},
|
||||
subscribers: make(map[string][]*httpSubscriber),
|
||||
exit: make(chan chan error),
|
||||
|
@ -4,23 +4,44 @@ package nats
|
||||
import (
|
||||
"context"
|
||||
"errors"
|
||||
"net"
|
||||
"net/url"
|
||||
"strconv"
|
||||
"strings"
|
||||
"sync"
|
||||
"time"
|
||||
|
||||
"github.com/micro/go-micro/broker"
|
||||
"github.com/micro/go-micro/codec/json"
|
||||
"github.com/micro/go-micro/registry"
|
||||
"github.com/micro/go-micro/util/addr"
|
||||
"github.com/micro/go-micro/util/log"
|
||||
"github.com/nats-io/nats-server/v2/server"
|
||||
nats "github.com/nats-io/nats.go"
|
||||
)
|
||||
|
||||
type natsBroker struct {
|
||||
sync.Once
|
||||
sync.RWMutex
|
||||
addrs []string
|
||||
conn *nats.Conn
|
||||
opts broker.Options
|
||||
nopts nats.Options
|
||||
|
||||
// indicate if we're connected
|
||||
connected bool
|
||||
|
||||
addrs []string
|
||||
conn *nats.Conn
|
||||
opts broker.Options
|
||||
nopts nats.Options
|
||||
|
||||
// should we drain the connection
|
||||
drain bool
|
||||
closeCh chan (error)
|
||||
|
||||
// embedded server
|
||||
server *server.Server
|
||||
// configure to use local server
|
||||
local bool
|
||||
// server exit channel
|
||||
exit chan bool
|
||||
}
|
||||
|
||||
type subscriber struct {
|
||||
@ -62,6 +83,7 @@ func (n *natsBroker) Address() string {
|
||||
if n.conn != nil && n.conn.IsConnected() {
|
||||
return n.conn.ConnectedUrl()
|
||||
}
|
||||
|
||||
if len(n.addrs) > 0 {
|
||||
return n.addrs[0]
|
||||
}
|
||||
@ -69,7 +91,7 @@ func (n *natsBroker) Address() string {
|
||||
return ""
|
||||
}
|
||||
|
||||
func setAddrs(addrs []string) []string {
|
||||
func (n *natsBroker) setAddrs(addrs []string) []string {
|
||||
//nolint:prealloc
|
||||
var cAddrs []string
|
||||
for _, addr := range addrs {
|
||||
@ -81,16 +103,178 @@ func setAddrs(addrs []string) []string {
|
||||
}
|
||||
cAddrs = append(cAddrs, addr)
|
||||
}
|
||||
if len(cAddrs) == 0 {
|
||||
// if there's no address and we weren't told to
|
||||
// embed a local server then use the default url
|
||||
if len(cAddrs) == 0 && !n.local {
|
||||
cAddrs = []string{nats.DefaultURL}
|
||||
}
|
||||
return cAddrs
|
||||
}
|
||||
|
||||
// serve stats a local nats server if needed
|
||||
func (n *natsBroker) serve(exit chan bool) error {
|
||||
var host string
|
||||
var port int
|
||||
var local bool
|
||||
|
||||
// with no address we just default it
|
||||
// this is a local client address
|
||||
if len(n.addrs) == 0 || n.local {
|
||||
host = "127.0.0.1"
|
||||
port = -1
|
||||
local = true
|
||||
// with a local address we parse it
|
||||
} else {
|
||||
address := n.addrs[0]
|
||||
if strings.HasPrefix(address, "nats://") {
|
||||
address = strings.TrimPrefix(address, "nats://")
|
||||
}
|
||||
|
||||
if addr.IsLocal(address) {
|
||||
h, p, err := net.SplitHostPort(address)
|
||||
if err == nil {
|
||||
host = h
|
||||
port, _ = strconv.Atoi(p)
|
||||
local = true
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// we only setup a server for local things
|
||||
if !local {
|
||||
return nil
|
||||
}
|
||||
|
||||
// 1. create new server
|
||||
// 2. register the server
|
||||
// 3. connect to other servers
|
||||
var cOpts server.ClusterOpts
|
||||
var routes []*url.URL
|
||||
|
||||
// get existing nats servers to connect to
|
||||
services, err := n.opts.Registry.GetService("go.micro.nats.broker")
|
||||
if err == nil {
|
||||
for _, service := range services {
|
||||
for _, node := range service.Nodes {
|
||||
u, err := url.Parse("nats://" + node.Address)
|
||||
if err != nil {
|
||||
log.Log(err)
|
||||
continue
|
||||
}
|
||||
// append to the cluster routes
|
||||
routes = append(routes, u)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// try get existing server
|
||||
s := n.server
|
||||
|
||||
// get a host address
|
||||
caddr, err := addr.Extract("")
|
||||
if err != nil {
|
||||
caddr = "0.0.0.0"
|
||||
}
|
||||
|
||||
// set cluster opts
|
||||
cOpts = server.ClusterOpts{
|
||||
Host: caddr,
|
||||
Port: -1,
|
||||
}
|
||||
|
||||
if s == nil {
|
||||
var err error
|
||||
s, err = server.NewServer(&server.Options{
|
||||
// Specify the host
|
||||
Host: host,
|
||||
// Use a random port
|
||||
Port: port,
|
||||
// Set the cluster ops
|
||||
Cluster: cOpts,
|
||||
// Set the routes
|
||||
Routes: routes,
|
||||
NoLog: true,
|
||||
NoSigs: true,
|
||||
MaxControlLine: 2048,
|
||||
TLSConfig: n.opts.TLSConfig,
|
||||
})
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
// save the server
|
||||
n.server = s
|
||||
}
|
||||
|
||||
// start the server
|
||||
go s.Start()
|
||||
|
||||
var ready bool
|
||||
|
||||
// wait till its ready for connections
|
||||
for i := 0; i < 3; i++ {
|
||||
if s.ReadyForConnections(time.Second) {
|
||||
ready = true
|
||||
break
|
||||
}
|
||||
}
|
||||
|
||||
if !ready {
|
||||
return errors.New("server not ready")
|
||||
}
|
||||
|
||||
// set the client address
|
||||
n.addrs = []string{s.ClientURL()}
|
||||
|
||||
go func() {
|
||||
// register the cluster address
|
||||
for {
|
||||
select {
|
||||
case <-exit:
|
||||
// deregister on exit
|
||||
n.opts.Registry.Deregister(®istry.Service{
|
||||
Name: "go.micro.nats.broker",
|
||||
Version: "v2",
|
||||
Nodes: []*registry.Node{
|
||||
{Id: s.ID(), Address: s.ClusterAddr().String()},
|
||||
},
|
||||
})
|
||||
s.Shutdown()
|
||||
return
|
||||
default:
|
||||
// register the broker
|
||||
n.opts.Registry.Register(®istry.Service{
|
||||
Name: "go.micro.nats.broker",
|
||||
Version: "v2",
|
||||
Nodes: []*registry.Node{
|
||||
{Id: s.ID(), Address: s.ClusterAddr().String()},
|
||||
},
|
||||
}, registry.RegisterTTL(time.Minute))
|
||||
time.Sleep(time.Minute)
|
||||
}
|
||||
}
|
||||
}()
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
func (n *natsBroker) Connect() error {
|
||||
n.Lock()
|
||||
defer n.Unlock()
|
||||
|
||||
if !n.connected {
|
||||
// create exit chan
|
||||
n.exit = make(chan bool)
|
||||
|
||||
// start the server if needed
|
||||
if err := n.serve(n.exit); err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
// set to connected
|
||||
n.connected = true
|
||||
}
|
||||
|
||||
status := nats.CLOSED
|
||||
if n.conn != nil {
|
||||
status = n.conn.Status()
|
||||
@ -122,11 +306,29 @@ func (n *natsBroker) Connect() error {
|
||||
func (n *natsBroker) Disconnect() error {
|
||||
n.RLock()
|
||||
defer n.RUnlock()
|
||||
|
||||
// drain the connection if specified
|
||||
if n.drain {
|
||||
n.conn.Drain()
|
||||
return <-n.closeCh
|
||||
}
|
||||
|
||||
// close the client connection
|
||||
n.conn.Close()
|
||||
|
||||
// shutdown the local server
|
||||
// and deregister
|
||||
if n.server != nil {
|
||||
select {
|
||||
case <-n.exit:
|
||||
default:
|
||||
close(n.exit)
|
||||
}
|
||||
}
|
||||
|
||||
// set not connected
|
||||
n.connected = false
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
@ -191,21 +393,6 @@ func (n *natsBroker) String() string {
|
||||
return "nats"
|
||||
}
|
||||
|
||||
func NewBroker(opts ...broker.Option) broker.Broker {
|
||||
options := broker.Options{
|
||||
// Default codec
|
||||
Codec: json.Marshaler{},
|
||||
Context: context.Background(),
|
||||
}
|
||||
|
||||
n := &natsBroker{
|
||||
opts: options,
|
||||
}
|
||||
n.setOption(opts...)
|
||||
|
||||
return n
|
||||
}
|
||||
|
||||
func (n *natsBroker) setOption(opts ...broker.Option) {
|
||||
for _, o := range opts {
|
||||
o(&n.opts)
|
||||
@ -219,10 +406,15 @@ func (n *natsBroker) setOption(opts ...broker.Option) {
|
||||
n.nopts = nopts
|
||||
}
|
||||
|
||||
local, ok := n.opts.Context.Value(localServerKey{}).(bool)
|
||||
if ok {
|
||||
n.local = local
|
||||
}
|
||||
|
||||
// broker.Options have higher priority than nats.Options
|
||||
// only if Addrs, Secure or TLSConfig were not set through a broker.Option
|
||||
// we read them from nats.Option
|
||||
if len(n.opts.Addrs) == 0 {
|
||||
if len(n.opts.Addrs) == 0 && !n.local {
|
||||
n.opts.Addrs = n.nopts.Servers
|
||||
}
|
||||
|
||||
@ -233,7 +425,7 @@ func (n *natsBroker) setOption(opts ...broker.Option) {
|
||||
if n.opts.TLSConfig == nil {
|
||||
n.opts.TLSConfig = n.nopts.TLSConfig
|
||||
}
|
||||
n.addrs = setAddrs(n.opts.Addrs)
|
||||
n.addrs = n.setAddrs(n.opts.Addrs)
|
||||
|
||||
if n.opts.Context.Value(drainConnectionKey{}) != nil {
|
||||
n.drain = true
|
||||
@ -254,3 +446,19 @@ func (n *natsBroker) onAsyncError(conn *nats.Conn, sub *nats.Subscription, err e
|
||||
n.closeCh <- err
|
||||
}
|
||||
}
|
||||
|
||||
func NewBroker(opts ...broker.Option) broker.Broker {
|
||||
options := broker.Options{
|
||||
// Default codec
|
||||
Codec: json.Marshaler{},
|
||||
Context: context.Background(),
|
||||
Registry: registry.DefaultRegistry,
|
||||
}
|
||||
|
||||
n := &natsBroker{
|
||||
opts: options,
|
||||
}
|
||||
n.setOption(opts...)
|
||||
|
||||
return n
|
||||
}
|
||||
|
@ -7,12 +7,18 @@ import (
|
||||
|
||||
type optionsKey struct{}
|
||||
type drainConnectionKey struct{}
|
||||
type localServerKey struct{}
|
||||
|
||||
// Options accepts nats.Options
|
||||
func Options(opts nats.Options) broker.Option {
|
||||
return setBrokerOption(optionsKey{}, opts)
|
||||
}
|
||||
|
||||
// LocalServer embeds a local server rather than connecting to one
|
||||
func LocalServer() broker.Option {
|
||||
return setBrokerOption(localServerKey{}, true)
|
||||
}
|
||||
|
||||
// DrainConnection will drain subscription on close
|
||||
func DrainConnection() broker.Option {
|
||||
return setBrokerOption(drainConnectionKey{}, struct{}{})
|
||||
|
@ -13,6 +13,8 @@ type Options struct {
|
||||
Secure bool
|
||||
Codec codec.Marshaler
|
||||
TLSConfig *tls.Config
|
||||
// Registry used for clustering
|
||||
Registry registry.Registry
|
||||
// Other options for implementations of the interface
|
||||
// can be stored in a context
|
||||
Context context.Context
|
||||
@ -92,7 +94,7 @@ func Queue(name string) SubscribeOption {
|
||||
|
||||
func Registry(r registry.Registry) Option {
|
||||
return func(o *Options) {
|
||||
o.Context = context.WithValue(o.Context, registryKey, r)
|
||||
o.Registry = r
|
||||
}
|
||||
}
|
||||
|
||||
|
@ -3,9 +3,7 @@ package cmd
|
||||
|
||||
import (
|
||||
"fmt"
|
||||
"io"
|
||||
"math/rand"
|
||||
"os"
|
||||
"strings"
|
||||
"time"
|
||||
|
||||
@ -273,7 +271,7 @@ var (
|
||||
// used for default selection as the fall back
|
||||
defaultClient = "grpc"
|
||||
defaultServer = "grpc"
|
||||
defaultBroker = "http"
|
||||
defaultBroker = "nats"
|
||||
defaultRegistry = "mdns"
|
||||
defaultSelector = "registry"
|
||||
defaultTransport = "http"
|
||||
@ -283,11 +281,6 @@ var (
|
||||
|
||||
func init() {
|
||||
rand.Seed(time.Now().Unix())
|
||||
help := cli.HelpPrinter
|
||||
cli.HelpPrinter = func(writer io.Writer, templ string, data interface{}) {
|
||||
help(writer, templ, data)
|
||||
os.Exit(0)
|
||||
}
|
||||
}
|
||||
|
||||
func newCmd(opts ...Option) Cmd {
|
||||
|
@ -1,17 +1,24 @@
|
||||
package micro
|
||||
|
||||
import (
|
||||
"github.com/micro/go-micro/broker"
|
||||
"github.com/micro/go-micro/client"
|
||||
"github.com/micro/go-micro/server"
|
||||
"github.com/micro/go-micro/store"
|
||||
|
||||
// set defaults
|
||||
"github.com/micro/go-micro/broker/nats"
|
||||
gcli "github.com/micro/go-micro/client/grpc"
|
||||
gsrv "github.com/micro/go-micro/server/grpc"
|
||||
memStore "github.com/micro/go-micro/store/memory"
|
||||
)
|
||||
|
||||
func init() {
|
||||
// default broker
|
||||
broker.DefaultBroker = nats.NewBroker(
|
||||
// embedded nats server
|
||||
nats.LocalServer(),
|
||||
)
|
||||
// default client
|
||||
client.DefaultClient = gcli.NewClient()
|
||||
// default server
|
||||
|
3
go.mod
3
go.mod
@ -32,6 +32,9 @@ require (
|
||||
github.com/micro/mdns v0.3.0
|
||||
github.com/miekg/dns v1.1.26
|
||||
github.com/mitchellh/hashstructure v1.0.0
|
||||
github.com/nats-io/gnatsd v1.4.1 // indirect
|
||||
github.com/nats-io/nats-server v1.4.1
|
||||
github.com/nats-io/nats-server/v2 v2.1.2
|
||||
github.com/nats-io/nats.go v1.9.1
|
||||
github.com/nlopes/slack v0.6.0
|
||||
github.com/oxtoacart/bpool v0.0.0-20190530202638-03653db5a59c
|
||||
|
10
go.sum
10
go.sum
@ -253,12 +253,22 @@ github.com/morikuni/aec v0.0.0-20170113033406-39771216ff4c h1:nXxl5PrvVm2L/wCy8d
|
||||
github.com/morikuni/aec v0.0.0-20170113033406-39771216ff4c/go.mod h1:BbKIizmSmc5MMPqRYbxO4ZU0S0+P200+tUnFx7PXmsc=
|
||||
github.com/mwitkow/go-conntrack v0.0.0-20161129095857-cc309e4a2223/go.mod h1:qRWi+5nqEBWmkhHvq77mSJWrCKwh8bxhgT7d/eI7P4U=
|
||||
github.com/namedotcom/go v0.0.0-20180403034216-08470befbe04/go.mod h1:5sN+Lt1CaY4wsPvgQH/jsuJi4XO2ssZbdsIizr4CVC8=
|
||||
github.com/nats-io/gnatsd v1.4.1 h1:RconcfDeWpKCD6QIIwiVFcvForlXpWeJP7i5/lDLy44=
|
||||
github.com/nats-io/gnatsd v1.4.1/go.mod h1:nqco77VO78hLCJpIcVfygDP2rPGfsEHkGTUk94uh5DQ=
|
||||
github.com/nats-io/jwt v0.3.0 h1:xdnzwFETV++jNc4W1mw//qFyJGb2ABOombmZJQS4+Qo=
|
||||
github.com/nats-io/jwt v0.3.0/go.mod h1:fRYCDE99xlTsqUzISS1Bi75UBJ6ljOJQOAAu5VglpSg=
|
||||
github.com/nats-io/jwt v0.3.2 h1:+RB5hMpXUUA2dfxuhBTEkMOrYmM+gKIZYS1KjSostMI=
|
||||
github.com/nats-io/jwt v0.3.2/go.mod h1:/euKqTS1ZD+zzjYrY7pseZrTtWQSjujC7xjPc8wL6eU=
|
||||
github.com/nats-io/nats-server v1.4.1 h1:Ul1oSOGNV/L8kjr4v6l2f9Yet6WY+LevH1/7cRZ/qyA=
|
||||
github.com/nats-io/nats-server v1.4.1/go.mod h1:c8f/fHd2B6Hgms3LtCaI7y6pC4WD1f4SUxcCud5vhBc=
|
||||
github.com/nats-io/nats-server/v2 v2.1.2 h1:i2Ly0B+1+rzNZHHWtD4ZwKi+OU5l+uQo1iDHZ2PmiIc=
|
||||
github.com/nats-io/nats-server/v2 v2.1.2/go.mod h1:Afk+wRZqkMQs/p45uXdrVLuab3gwv3Z8C4HTBu8GD/k=
|
||||
github.com/nats-io/nats.go v1.9.1 h1:ik3HbLhZ0YABLto7iX80pZLPw/6dx3T+++MZJwLnMrQ=
|
||||
github.com/nats-io/nats.go v1.9.1/go.mod h1:ZjDU1L/7fJ09jvUSRVBR2e7+RnLiiIQyqyzEE/Zbp4w=
|
||||
github.com/nats-io/nkeys v0.1.0 h1:qMd4+pRHgdr1nAClu+2h/2a5F2TmKcCzjCDazVgRoX4=
|
||||
github.com/nats-io/nkeys v0.1.0/go.mod h1:xpnFELMwJABBLVhffcfd1MZx6VsNRFpEugbxziKVo7w=
|
||||
github.com/nats-io/nkeys v0.1.3 h1:6JrEfig+HzTH85yxzhSVbjHRJv9cn0p6n3IngIcM5/k=
|
||||
github.com/nats-io/nkeys v0.1.3/go.mod h1:xpnFELMwJABBLVhffcfd1MZx6VsNRFpEugbxziKVo7w=
|
||||
github.com/nats-io/nuid v1.0.1 h1:5iA8DT8V7q8WK2EScv2padNa/rTESc1KdnPw4TC2paw=
|
||||
github.com/nats-io/nuid v1.0.1/go.mod h1:19wcPz3Ph3q0Jbyiqsd0kePYG7A95tJPxeL+1OSON2c=
|
||||
github.com/nbio/st v0.0.0-20140626010706-e9e8d9816f32/go.mod h1:9wM+0iRr9ahx58uYLpLIr5fm8diHn0JbqRycJi6w0Ms=
|
||||
|
@ -27,6 +27,29 @@ func isPrivateIP(ipAddr string) bool {
|
||||
return false
|
||||
}
|
||||
|
||||
// IsLocal tells us whether an ip is local
|
||||
func IsLocal(addr string) bool {
|
||||
// extract the host
|
||||
host, _, err := net.SplitHostPort(addr)
|
||||
if err == nil {
|
||||
addr = host
|
||||
}
|
||||
|
||||
// check if its localhost
|
||||
if addr == "localhost" {
|
||||
return true
|
||||
}
|
||||
|
||||
// check against all local ips
|
||||
for _, ip := range IPs() {
|
||||
if addr == ip {
|
||||
return true
|
||||
}
|
||||
}
|
||||
|
||||
return false
|
||||
}
|
||||
|
||||
// Extract returns a real ip
|
||||
func Extract(addr string) (string, error) {
|
||||
// if addr specified then its returned
|
||||
|
@ -5,6 +5,26 @@ import (
|
||||
"testing"
|
||||
)
|
||||
|
||||
func TestIsLocal(t *testing.T) {
|
||||
testData := []struct {
|
||||
addr string
|
||||
expect bool
|
||||
}{
|
||||
{"localhost", true},
|
||||
{"localhost:8080", true},
|
||||
{"127.0.0.1", true},
|
||||
{"127.0.0.1:1001", true},
|
||||
{"80.1.1.1", false},
|
||||
}
|
||||
|
||||
for _, d := range testData {
|
||||
res := IsLocal(d.addr)
|
||||
if res != d.expect {
|
||||
t.Fatalf("expected %t got %t", d.expect, res)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
func TestExtractor(t *testing.T) {
|
||||
testData := []struct {
|
||||
addr string
|
||||
|
Loading…
x
Reference in New Issue
Block a user