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373 lines (319 loc) · 9.99 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"
"encoding/json"
"errors"
"fmt"
"net"
"net/url"
"os"
"path/filepath"
"sync"
"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"
"github.com/rabbitmq/amqp091-go"
)
// AMQPArgs - AMQP target arguments.
type AMQPArgs struct {
Enable bool `json:"enable"`
URL xnet.URL `json:"url"`
Exchange string `json:"exchange"`
RoutingKey string `json:"routingKey"`
ExchangeType string `json:"exchangeType"`
DeliveryMode uint8 `json:"deliveryMode"`
Mandatory bool `json:"mandatory"`
Immediate bool `json:"immediate"`
Durable bool `json:"durable"`
Internal bool `json:"internal"`
NoWait bool `json:"noWait"`
AutoDeleted bool `json:"autoDeleted"`
PublisherConfirms bool `json:"publisherConfirms"`
QueueDir string `json:"queueDir"`
QueueLimit uint64 `json:"queueLimit"`
}
//lint:file-ignore ST1003 We cannot change these exported names.
// AMQP input constants.
const (
AmqpQueueDir = "queue_dir"
AmqpQueueLimit = "queue_limit"
AmqpURL = "url"
AmqpExchange = "exchange"
AmqpRoutingKey = "routing_key"
AmqpExchangeType = "exchange_type"
AmqpDeliveryMode = "delivery_mode"
AmqpMandatory = "mandatory"
AmqpImmediate = "immediate"
AmqpDurable = "durable"
AmqpInternal = "internal"
AmqpNoWait = "no_wait"
AmqpAutoDeleted = "auto_deleted"
AmqpArguments = "arguments"
AmqpPublisherConfirms = "publisher_confirms"
EnvAMQPEnable = "MINIO_NOTIFY_AMQP_ENABLE"
EnvAMQPURL = "MINIO_NOTIFY_AMQP_URL"
EnvAMQPExchange = "MINIO_NOTIFY_AMQP_EXCHANGE"
EnvAMQPRoutingKey = "MINIO_NOTIFY_AMQP_ROUTING_KEY"
EnvAMQPExchangeType = "MINIO_NOTIFY_AMQP_EXCHANGE_TYPE"
EnvAMQPDeliveryMode = "MINIO_NOTIFY_AMQP_DELIVERY_MODE"
EnvAMQPMandatory = "MINIO_NOTIFY_AMQP_MANDATORY"
EnvAMQPImmediate = "MINIO_NOTIFY_AMQP_IMMEDIATE"
EnvAMQPDurable = "MINIO_NOTIFY_AMQP_DURABLE"
EnvAMQPInternal = "MINIO_NOTIFY_AMQP_INTERNAL"
EnvAMQPNoWait = "MINIO_NOTIFY_AMQP_NO_WAIT"
EnvAMQPAutoDeleted = "MINIO_NOTIFY_AMQP_AUTO_DELETED"
EnvAMQPArguments = "MINIO_NOTIFY_AMQP_ARGUMENTS"
EnvAMQPPublisherConfirms = "MINIO_NOTIFY_AMQP_PUBLISHING_CONFIRMS"
EnvAMQPQueueDir = "MINIO_NOTIFY_AMQP_QUEUE_DIR"
EnvAMQPQueueLimit = "MINIO_NOTIFY_AMQP_QUEUE_LIMIT"
)
// Validate AMQP arguments
func (a *AMQPArgs) Validate() error {
if !a.Enable {
return nil
}
if _, err := amqp091.ParseURI(a.URL.String()); err != nil {
return err
}
if a.QueueDir != "" {
if !filepath.IsAbs(a.QueueDir) {
return errors.New("queueDir path should be absolute")
}
}
return nil
}
// AMQPTarget - AMQP target
type AMQPTarget struct {
initOnce once.Init
id event.TargetID
args AMQPArgs
conn *amqp091.Connection
connMutex sync.Mutex
store store.Store[event.Event]
loggerOnce logger.LogOnce
quitCh chan struct{}
}
// ID - returns TargetID.
func (target *AMQPTarget) ID() event.TargetID {
return target.id
}
// Name - returns the Name of the target.
func (target *AMQPTarget) Name() string {
return target.ID().String()
}
// Store returns any underlying store if set.
func (target *AMQPTarget) Store() event.TargetStore {
return target.store
}
// IsActive - Return true if target is up and active
func (target *AMQPTarget) IsActive() (bool, error) {
if err := target.init(); err != nil {
return false, err
}
return target.isActive()
}
func (target *AMQPTarget) isActive() (bool, error) {
ch, _, err := target.channel()
if err != nil {
return false, err
}
defer func() {
ch.Close()
}()
return true, nil
}
func (target *AMQPTarget) channel() (*amqp091.Channel, chan amqp091.Confirmation, error) {
var err error
var conn *amqp091.Connection
var ch *amqp091.Channel
isAMQPClosedErr := func(err error) bool {
if err == amqp091.ErrClosed {
return true
}
if nerr, ok := err.(*net.OpError); ok {
return (nerr.Err.Error() == "use of closed network connection")
}
return false
}
target.connMutex.Lock()
defer target.connMutex.Unlock()
if target.conn != nil {
ch, err = target.conn.Channel()
if err == nil {
if target.args.PublisherConfirms {
confirms := ch.NotifyPublish(make(chan amqp091.Confirmation, 1))
if err := ch.Confirm(false); err != nil {
ch.Close()
return nil, nil, err
}
return ch, confirms, nil
}
return ch, nil, nil
}
if !isAMQPClosedErr(err) {
return nil, nil, err
}
// close when we know this is a network error.
target.conn.Close()
}
conn, err = amqp091.Dial(target.args.URL.String())
if err != nil {
if xnet.IsConnRefusedErr(err) {
return nil, nil, store.ErrNotConnected
}
return nil, nil, err
}
ch, err = conn.Channel()
if err != nil {
return nil, nil, err
}
target.conn = conn
if target.args.PublisherConfirms {
confirms := ch.NotifyPublish(make(chan amqp091.Confirmation, 1))
if err := ch.Confirm(false); err != nil {
ch.Close()
return nil, nil, err
}
return ch, confirms, nil
}
return ch, nil, nil
}
// send - sends an event to the AMQP091.
func (target *AMQPTarget) send(eventData event.Event, ch *amqp091.Channel, confirms chan amqp091.Confirmation) 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
}
headers := make(amqp091.Table)
// Add more information here as required, but be aware to not overload headers
headers["minio-bucket"] = eventData.S3.Bucket.Name
headers["minio-event"] = eventData.EventName.String()
if err = ch.ExchangeDeclare(target.args.Exchange, target.args.ExchangeType, target.args.Durable,
target.args.AutoDeleted, target.args.Internal, target.args.NoWait, nil); err != nil {
return err
}
if err = ch.Publish(target.args.Exchange, target.args.RoutingKey, target.args.Mandatory,
target.args.Immediate, amqp091.Publishing{
Headers: headers,
ContentType: "application/json",
DeliveryMode: target.args.DeliveryMode,
Body: data,
}); err != nil {
return err
}
// check for publisher confirms only if its enabled
if target.args.PublisherConfirms {
confirmed := <-confirms
if !confirmed.Ack {
return fmt.Errorf("failed delivery of delivery tag: %d", confirmed.DeliveryTag)
}
}
return nil
}
// Save - saves the events to the store which will be replayed when the amqp connection is active.
func (target *AMQPTarget) Save(eventData event.Event) error {
if target.store != nil {
return target.store.Put(eventData)
}
if err := target.init(); err != nil {
return err
}
ch, confirms, err := target.channel()
if err != nil {
return err
}
defer ch.Close()
return target.send(eventData, ch, confirms)
}
// SendFromStore - reads an event from store and sends it to AMQP091.
func (target *AMQPTarget) SendFromStore(key store.Key) error {
if err := target.init(); err != nil {
return err
}
ch, confirms, err := target.channel()
if err != nil {
return err
}
defer ch.Close()
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, ch, confirms); err != nil {
return err
}
// Delete the event from store.
return target.store.Del(key.Name)
}
// Close - does nothing and available for interface compatibility.
func (target *AMQPTarget) Close() error {
close(target.quitCh)
if target.conn != nil {
return target.conn.Close()
}
return nil
}
func (target *AMQPTarget) init() error {
return target.initOnce.Do(target.initAMQP)
}
func (target *AMQPTarget) initAMQP() error {
conn, err := amqp091.Dial(target.args.URL.String())
if err != nil {
if xnet.IsConnRefusedErr(err) || xnet.IsConnResetErr(err) {
target.loggerOnce(context.Background(), err, target.ID().String())
}
return err
}
target.conn = conn
return nil
}
// NewAMQPTarget - creates new AMQP target.
func NewAMQPTarget(id string, args AMQPArgs, loggerOnce logger.LogOnce) (*AMQPTarget, error) {
var queueStore store.Store[event.Event]
if args.QueueDir != "" {
queueDir := filepath.Join(args.QueueDir, storePrefix+"-amqp-"+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 AMQP `%s`: %w", id, err)
}
}
target := &AMQPTarget{
id: event.TargetID{ID: id, Name: "amqp"},
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
}