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287 lines (245 loc) · 7.06 KB
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// Copyright (c) 2015-2023 MinIO, Inc.
//
// This file is part of MinIO Object Storage stack
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package target
import (
"context"
"crypto/tls"
"encoding/json"
"errors"
"fmt"
"net/url"
"os"
"path/filepath"
"github.com/nsqio/go-nsq"
"github.com/minio/minio/internal/event"
"github.com/minio/minio/internal/logger"
"github.com/minio/minio/internal/once"
"github.com/minio/minio/internal/store"
xnet "github.com/minio/pkg/v2/net"
)
// NSQ constants
const (
NSQAddress = "nsqd_address"
NSQTopic = "topic"
NSQTLS = "tls"
NSQTLSSkipVerify = "tls_skip_verify"
NSQQueueDir = "queue_dir"
NSQQueueLimit = "queue_limit"
EnvNSQEnable = "MINIO_NOTIFY_NSQ_ENABLE"
EnvNSQAddress = "MINIO_NOTIFY_NSQ_NSQD_ADDRESS"
EnvNSQTopic = "MINIO_NOTIFY_NSQ_TOPIC"
EnvNSQTLS = "MINIO_NOTIFY_NSQ_TLS"
EnvNSQTLSSkipVerify = "MINIO_NOTIFY_NSQ_TLS_SKIP_VERIFY"
EnvNSQQueueDir = "MINIO_NOTIFY_NSQ_QUEUE_DIR"
EnvNSQQueueLimit = "MINIO_NOTIFY_NSQ_QUEUE_LIMIT"
)
// NSQArgs - NSQ target arguments.
type NSQArgs struct {
Enable bool `json:"enable"`
NSQDAddress xnet.Host `json:"nsqdAddress"`
Topic string `json:"topic"`
TLS struct {
Enable bool `json:"enable"`
SkipVerify bool `json:"skipVerify"`
} `json:"tls"`
QueueDir string `json:"queueDir"`
QueueLimit uint64 `json:"queueLimit"`
}
// Validate NSQArgs fields
func (n NSQArgs) Validate() error {
if !n.Enable {
return nil
}
if n.NSQDAddress.IsEmpty() {
return errors.New("empty nsqdAddress")
}
if n.Topic == "" {
return errors.New("empty topic")
}
if n.QueueDir != "" {
if !filepath.IsAbs(n.QueueDir) {
return errors.New("queueDir path should be absolute")
}
}
return nil
}
// NSQTarget - NSQ target.
type NSQTarget struct {
initOnce once.Init
id event.TargetID
args NSQArgs
producer *nsq.Producer
store store.Store[event.Event]
config *nsq.Config
loggerOnce logger.LogOnce
quitCh chan struct{}
}
// ID - returns target ID.
func (target *NSQTarget) ID() event.TargetID {
return target.id
}
// Name - returns the Name of the target.
func (target *NSQTarget) Nam
8000
e() string {
return target.ID().String()
}
// Store returns any underlying store if set.
func (target *NSQTarget) Store() event.TargetStore {
return target.store
}
// IsActive - Return true if target is up and active
func (target *NSQTarget) IsActive() (bool, error) {
if err := target.init(); err != nil {
return false, err
}
return target.isActive()
}
func (target *NSQTarget) isActive() (bool, error) {
if target.producer == nil {
producer, err := nsq.NewProducer(target.args.NSQDAddress.String(), target.config)
if err != nil {
return false, err
}
target.producer = producer
}
if err := target.producer.Ping(); err != nil {
// To treat "connection refused" errors as errNotConnected.
if xnet.IsConnRefusedErr(err) {
return false, store.ErrNotConnected
}
return false, err
}
return true, nil
}
// Save - saves the events to the store which will be replayed when the nsq connection is active.
func (target *NSQTarget) Save(eventData event.Event) error {
if target.store != nil {
return target.store.Put(eventData)
}
if err := target.init(); err != nil {
return err
}
_, err := target.isActive()
if err != nil {
return err
}
return target.send(eventData)
}
// send - sends an event to the NSQ.
func (target *NSQTarget) send(eventData event.Event) error {
objectName, err := url.QueryUnescape(eventData.S3.Object.Key)
if err != nil {
return err
}
key := eventData.S3.Bucket.Name + "/" + objectName
data, err := json.Marshal(event.Log{EventName: eventData.EventName, Key: key, Records: []event.Event{eventData}})
if err != nil {
return err
}
return target.producer.Publish(target.args.Topic, data)
}
// SendFromStore - reads an event from store and sends it to NSQ.
func (target *NSQTarget) SendFromStore(key store.Key) error {
if err := target.init(); err != nil {
return err
}
_, err := target.isActive()
if err != nil {
return err
}
eventData, eErr := target.store.Get(key.Name)
if eErr != nil {
// The last event key in a successful batch will be sent in the channel atmost once by the replayEvents()
// Such events will not exist and wouldve been already been sent successfully.
if os.IsNotExist(eErr) {
return nil
}
return eErr
}
if err := target.send(eventData); err != nil {
return err
}
// Delete the event from store.
return target.store.Del(key.Name)
}
// Close - closes underneath connections to NSQD server.
func (target *NSQTarget) Close() (err error) {
close(target.quitCh)
if target.producer != nil {
// this blocks until complete:
target.producer.Stop()
}
return nil
}
func (target *NSQTarget) init() error {
return target.initOnce.Do(target.initNSQ)
}
func (target *NSQTarget) initNSQ() error {
args := target.args
config := nsq.NewConfig()
if args.TLS.Enable {
config.TlsV1 = true
config.TlsConfig = &tls.Config{
InsecureSkipVerify: args.TLS.SkipVerify,
}
}
target.config = config
producer, err := nsq.NewProducer(args.NSQDAddress.String(), config)
if err != nil {
target.loggerOnce(context.Background(), err, target.ID().String())
return err
}
target.producer = producer
err = target.producer.Ping()
if err != nil {
// To treat &qu
57F3
ot;connection refused" errors as errNotConnected.
if !(xnet.IsConnRefusedErr(err) || xnet.IsConnResetErr(err)) {
target.loggerOnce(context.Background(), err, target.ID().String())
}
target.producer.Stop()
return err
}
yes, err := target.isActive()
if err != nil {
return err
}
if !yes {
return store.ErrNotConnected
}
return nil
}
// NewNSQTarget - creates new NSQ target.
func NewNSQTarget(id string, args NSQArgs, loggerOnce logger.LogOnce) (*NSQTarget, error) {
var queueStore store.Store[event.Event]
if args.QueueDir != "" {
queueDir := filepath.Join(args.QueueDir, storePrefix+"-nsq-"+id)
queueStore = store.NewQueueStore[event.Event](queueDir, args.QueueLimit, event.StoreExtension)
if err := queueStore.Open(); err != nil {
return nil, fmt.Errorf("unable to initialize the queue store of NSQ `%s`: %w", id, err)
}
}
target := &NSQTarget{
id: event.TargetID{ID: id, Name: "nsq"},
args: args,
loggerOnce: loggerOnce,
store: queueStore,
quitCh: make(chan struct{}),
}
if target.store != nil {
store.StreamItems(target.store, target, target.quitCh, target.loggerOnce)
}
return target, nil
}