635 lines
19 KiB
Go
635 lines
19 KiB
Go
/*
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* Minio Cloud Storage, (C) 2018 Minio, Inc.
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*
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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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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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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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*/
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package cmd
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import (
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"bytes"
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"context"
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"encoding/json"
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"encoding/xml"
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"fmt"
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"net/url"
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"path"
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"sync"
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xerrors "github.com/minio/minio/pkg/errors"
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"github.com/minio/minio/pkg/event"
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"github.com/minio/minio/pkg/hash"
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xnet "github.com/minio/minio/pkg/net"
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)
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// NotificationSys - notification system.
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type NotificationSys struct {
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sync.RWMutex
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targetList *event.TargetList
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bucketRulesMap map[string]event.RulesMap
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bucketRemoteTargetRulesMap map[string]map[event.TargetID]event.RulesMap
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peerRPCClientMap map[xnet.Host]*PeerRPCClient
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}
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// GetARNList - returns available ARNs.
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func (sys *NotificationSys) GetARNList() []string {
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arns := []string{}
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region := globalServerConfig.GetRegion()
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for _, targetID := range sys.targetList.List() {
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arns = append(arns, targetID.ToARN(region).String())
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}
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return arns
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}
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// GetPeerRPCClient - returns PeerRPCClient of addr.
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func (sys *NotificationSys) GetPeerRPCClient(addr xnet.Host) *PeerRPCClient {
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return sys.peerRPCClientMap[addr]
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}
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// DeleteBucket - calls DeleteBucket RPC call on all peers.
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func (sys *NotificationSys) DeleteBucket(bucketName string) map[xnet.Host]error {
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errors := make(map[xnet.Host]error)
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var wg sync.WaitGroup
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for addr, client := range sys.peerRPCClientMap {
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wg.Add(1)
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go func(addr xnet.Host, client *PeerRPCClient) {
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defer wg.Done()
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if err := client.DeleteBucket(bucketName); err != nil {
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errors[addr] = err
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}
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}(addr, client)
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}
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wg.Wait()
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return errors
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}
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// UpdateBucketPolicy - calls UpdateBucketPolicy RPC call on all peers.
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func (sys *NotificationSys) UpdateBucketPolicy(bucketName string) map[xnet.Host]error {
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errors := make(map[xnet.Host]error)
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var wg sync.WaitGroup
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for addr, client := range sys.peerRPCClientMap {
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wg.Add(1)
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go func(addr xnet.Host, client *PeerRPCClient) {
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defer wg.Done()
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if err := client.UpdateBucketPolicy(bucketName); err != nil {
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errors[addr] = err
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}
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}(addr, client)
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}
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wg.Wait()
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return errors
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}
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// PutBucketNotification - calls PutBucketNotification RPC call on all peers.
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func (sys *NotificationSys) PutBucketNotification(bucketName string, rulesMap event.RulesMap) map[xnet.Host]error {
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errors := make(map[xnet.Host]error)
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var wg sync.WaitGroup
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for addr, client := range sys.peerRPCClientMap {
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wg.Add(1)
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go func(addr xnet.Host, client *PeerRPCClient, rulesMap event.RulesMap) {
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defer wg.Done()
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if err := client.PutBucketNotification(bucketName, rulesMap); err != nil {
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errors[addr] = err
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}
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}(addr, client, rulesMap.Clone())
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}
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wg.Wait()
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return errors
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}
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// ListenBucketNotification - calls ListenBucketNotification RPC call on all peers.
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func (sys *NotificationSys) ListenBucketNotification(bucketName string, eventNames []event.Name, pattern string, targetID event.TargetID, localPeer xnet.Host) map[xnet.Host]error {
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errors := make(map[xnet.Host]error)
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var wg sync.WaitGroup
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for addr, client := range sys.peerRPCClientMap {
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wg.Add(1)
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go func(addr xnet.Host, client *PeerRPCClient) {
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defer wg.Done()
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if err := client.ListenBucketNotification(bucketName, eventNames, pattern, targetID, localPeer); err != nil {
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errors[addr] = err
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}
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}(addr, client)
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}
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wg.Wait()
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return errors
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}
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// AddRemoteTarget - adds event rules map, HTTP/PeerRPC client target to bucket name.
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func (sys *NotificationSys) AddRemoteTarget(bucketName string, target event.Target, rulesMap event.RulesMap) error {
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if err := sys.targetList.Add(target); err != nil {
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return err
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}
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sys.Lock()
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targetMap := sys.bucketRemoteTargetRulesMap[bucketName]
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if targetMap == nil {
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targetMap = make(map[event.TargetID]event.RulesMap)
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}
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targetMap[target.ID()] = rulesMap.Clone()
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sys.bucketRemoteTargetRulesMap[bucketName] = targetMap
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sys.Unlock()
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sys.AddRulesMap(bucketName, rulesMap)
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return nil
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}
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// RemoteTargetExist - checks whether given target ID is a HTTP/PeerRPC client target or not.
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func (sys *NotificationSys) RemoteTargetExist(bucketName string, targetID event.TargetID) bool {
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sys.Lock()
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defer sys.Unlock()
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targetMap, ok := sys.bucketRemoteTargetRulesMap[bucketName]
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if ok {
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_, ok = targetMap[targetID]
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}
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return ok
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}
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// initListeners - initializes PeerRPC clients available in listener.json.
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func (sys *NotificationSys) initListeners(objAPI ObjectLayer, bucketName string) error {
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// listener.json is available/applicable only in DistXL mode.
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if !globalIsDistXL {
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return nil
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}
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// Construct path to listener.json for the given bucket.
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configFile := path.Join(bucketConfigPrefix, bucketName, bucketListenerConfig)
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transactionConfigFile := configFile + ".transaction"
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// As object layer's GetObject() and PutObject() take respective lock on minioMetaBucket
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// and configFile, take a transaction lock to avoid data race between readConfig()
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// and saveConfig().
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objLock := globalNSMutex.NewNSLock(minioMetaBucket, transactionConfigFile)
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if err := objLock.GetLock(globalOperationTimeout); err != nil {
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return err
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}
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defer objLock.Unlock()
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reader, err := readConfig(objAPI, configFile)
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if err != nil && !xerrors.IsErrIgnored(err, errDiskNotFound, errNoSuchNotifications) {
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return err
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}
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listenerList := []ListenBucketNotificationArgs{}
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if reader != nil {
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if err = json.NewDecoder(reader).Decode(&listenerList); err != nil {
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errorIf(err, "Unable to parse listener.json.")
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return xerrors.Trace(err)
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}
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}
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if len(listenerList) == 0 {
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// Nothing to initialize for empty listener list.
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return nil
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}
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activeListenerList := []ListenBucketNotificationArgs{}
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for _, args := range listenerList {
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var found bool
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if found, err = isLocalHost(args.Addr.Name); err != nil {
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errorIf(err, "unable to check address %v is local host", args.Addr)
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return err
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}
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if found {
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// As this function is called at startup, skip HTTP listener to this host.
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continue
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}
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rpcClient := sys.GetPeerRPCClient(args.Addr)
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if rpcClient == nil {
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return fmt.Errorf("unable to find PeerRPCClient by address %v in listener.json for bucket %v", args.Addr, bucketName)
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}
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var exist bool
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if exist, err = rpcClient.RemoteTargetExist(bucketName, args.TargetID); err != nil {
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return err
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}
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if !exist {
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// Skip previously connected HTTP listener which is not found in remote peer.
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continue
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}
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target := NewPeerRPCClientTarget(bucketName, args.TargetID, rpcClient)
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rulesMap := event.NewRulesMap(args.EventNames, args.Pattern, target.ID())
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if err = sys.AddRemoteTarget(bucketName, target, rulesMap); err != nil {
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return err
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}
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activeListenerList = append(activeListenerList, args)
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}
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data, err := json.Marshal(activeListenerList)
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if err != nil {
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return err
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}
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return saveConfig(objAPI, configFile, data)
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}
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// Init - initializes notification system from notification.xml and listener.json of all buckets.
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func (sys *NotificationSys) Init(objAPI ObjectLayer) error {
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if objAPI == nil {
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return errInvalidArgument
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}
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buckets, err := objAPI.ListBuckets(context.Background())
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if err != nil {
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return err
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}
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for _, bucket := range buckets {
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config, err := readNotificationConfig(objAPI, bucket.Name)
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if err != nil {
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if !xerrors.IsErrIgnored(err, errDiskNotFound, errNoSuchNotifications) {
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errorIf(err, "Unable to load notification configuration of bucket %v", bucket.Name)
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return err
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}
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} else {
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sys.AddRulesMap(bucket.Name, config.ToRulesMap())
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}
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if err = sys.initListeners(objAPI, bucket.Name); err != nil {
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errorIf(err, "Unable to initialize HTTP listener for bucket %v", bucket.Name)
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return err
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}
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}
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return nil
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}
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// AddRulesMap - adds rules map for bucket name.
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func (sys *NotificationSys) AddRulesMap(bucketName string, rulesMap event.RulesMap) {
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sys.Lock()
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defer sys.Unlock()
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rulesMap = rulesMap.Clone()
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for _, targetRulesMap := range sys.bucketRemoteTargetRulesMap[bucketName] {
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rulesMap.Add(targetRulesMap)
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}
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rulesMap.Add(sys.bucketRulesMap[bucketName])
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sys.bucketRulesMap[bucketName] = rulesMap
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}
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// RemoveRulesMap - removes rules map for bucket name.
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func (sys *NotificationSys) RemoveRulesMap(bucketName string, rulesMap event.RulesMap) {
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sys.Lock()
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defer sys.Unlock()
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sys.bucketRulesMap[bucketName].Remove(rulesMap)
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if len(sys.bucketRulesMap[bucketName]) == 0 {
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delete(sys.bucketRulesMap, bucketName)
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}
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}
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// RemoveNotification - removes all notification configuration for bucket name.
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func (sys *NotificationSys) RemoveNotification(bucketName string) {
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sys.Lock()
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defer sys.Unlock()
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delete(sys.bucketRulesMap, bucketName)
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for targetID := range sys.bucketRemoteTargetRulesMap[bucketName] {
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sys.targetList.Remove(targetID)
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delete(sys.bucketRemoteTargetRulesMap[bucketName], targetID)
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}
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delete(sys.bucketRemoteTargetRulesMap, bucketName)
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}
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// RemoveAllRemoteTargets - closes and removes all HTTP/PeerRPC client targets.
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func (sys *NotificationSys) RemoveAllRemoteTargets() {
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for _, targetMap := range sys.bucketRemoteTargetRulesMap {
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for targetID := range targetMap {
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sys.targetList.Remove(targetID)
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}
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}
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}
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// RemoveRemoteTarget - closes and removes target by target ID.
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func (sys *NotificationSys) RemoveRemoteTarget(bucketName string, targetID event.TargetID) {
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for id, err := range sys.targetList.Remove(targetID) {
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errorIf(err, "unable to close target ID %v", id)
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}
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sys.Lock()
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defer sys.Unlock()
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if _, ok := sys.bucketRemoteTargetRulesMap[bucketName]; ok {
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delete(sys.bucketRemoteTargetRulesMap[bucketName], targetID)
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if len(sys.bucketRemoteTargetRulesMap[bucketName]) == 0 {
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delete(sys.bucketRemoteTargetRulesMap, bucketName)
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}
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}
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}
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func (sys *NotificationSys) send(bucketName string, eventData event.Event, targetIDs ...event.TargetID) map[event.TargetID]error {
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errMap := sys.targetList.Send(eventData, targetIDs...)
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for targetID := range errMap {
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if sys.RemoteTargetExist(bucketName, targetID) {
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sys.RemoveRemoteTarget(bucketName, targetID)
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}
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}
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return errMap
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}
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// Send - sends event data to all matching targets.
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func (sys *NotificationSys) Send(args eventArgs) map[event.TargetID]error {
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sys.RLock()
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targetIDSet := sys.bucketRulesMap[args.BucketName].Match(args.EventName, args.Object.Name)
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sys.RUnlock()
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if len(targetIDSet) == 0 {
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return nil
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}
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targetIDs := targetIDSet.ToSlice()
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return sys.send(args.BucketName, args.ToEvent(), targetIDs...)
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}
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// NewNotificationSys - creates new notification system object.
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func NewNotificationSys(config *serverConfig, endpoints EndpointList) (*NotificationSys, error) {
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targetList, err := getNotificationTargets(config)
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if err != nil {
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return nil, err
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}
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peerRPCClientMap := makeRemoteRPCClients(endpoints)
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// bucketRulesMap/bucketRemoteTargetRulesMap are initialized by NotificationSys.Init()
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return &NotificationSys{
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targetList: targetList,
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bucketRulesMap: make(map[string]event.RulesMap),
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bucketRemoteTargetRulesMap: make(map[string]map[event.TargetID]event.RulesMap),
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peerRPCClientMap: peerRPCClientMap,
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}, nil
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}
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type eventArgs struct {
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EventName event.Name
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BucketName string
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Object ObjectInfo
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ReqParams map[string]string
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Host string
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Port string
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UserAgent string
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}
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// ToEvent - converts to notification event.
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func (args eventArgs) ToEvent() event.Event {
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getOriginEndpoint := func() string {
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host := globalMinioHost
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if host == "" {
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// FIXME: Send FQDN or hostname of this machine than sending IP address.
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host = localIP4.ToSlice()[0]
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}
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return fmt.Sprintf("%s://%s:%s", getURLScheme(globalIsSSL), host, globalMinioPort)
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}
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creds := globalServerConfig.GetCredential()
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eventTime := UTCNow()
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uniqueID := fmt.Sprintf("%X", eventTime.UnixNano())
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newEvent := event.Event{
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EventVersion: "2.0",
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EventSource: "minio:s3",
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AwsRegion: globalServerConfig.GetRegion(),
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EventTime: eventTime.Format(event.AMZTimeFormat),
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EventName: args.EventName,
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UserIdentity: event.Identity{creds.AccessKey},
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RequestParameters: args.ReqParams,
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ResponseElements: map[string]string{
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"x-amz-request-id": uniqueID,
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"x-minio-origin-endpoint": getOriginEndpoint(), // Minio specific custom elements.
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},
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S3: event.Metadata{
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SchemaVersion: "1.0",
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ConfigurationID: "Config",
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Bucket: event.Bucket{
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Name: args.BucketName,
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OwnerIdentity: event.Identity{creds.AccessKey},
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ARN: bucketARNPrefix + args.BucketName,
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},
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Object: event.Object{
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Key: url.QueryEscape(args.Object.Name),
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VersionID: "1",
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Sequencer: uniqueID,
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},
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},
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Source: event.Source{
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Host: args.Host,
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Port: args.Port,
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UserAgent: args.UserAgent,
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},
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}
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if args.EventName != event.ObjectRemovedDelete {
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newEvent.S3.Object.ETag = args.Object.ETag
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newEvent.S3.Object.Size = args.Object.Size
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newEvent.S3.Object.ContentType = args.Object.ContentType
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newEvent.S3.Object.UserMetadata = args.Object.UserDefined
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}
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return newEvent
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}
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func sendEvent(args eventArgs) {
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// globalNotificationSys is not initialized in gateway mode.
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if globalNotificationSys == nil {
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return
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}
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for targetID, err := range globalNotificationSys.Send(args) {
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errorIf(err, "unable to send event %v of bucket: %v, object: %v to target %v",
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args.EventName, args.BucketName, args.Object.Name, targetID)
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}
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}
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func saveConfig(objAPI ObjectLayer, configFile string, data []byte) error {
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hashReader, err := hash.NewReader(bytes.NewReader(data), int64(len(data)), "", getSHA256Hash(data))
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if err != nil {
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return err
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}
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_, err = objAPI.PutObject(context.Background(), minioMetaBucket, configFile, hashReader, nil)
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return err
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}
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func readConfig(objAPI ObjectLayer, configFile string) (*bytes.Buffer, error) {
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var buffer bytes.Buffer
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// Read entire content by setting size to -1
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err := objAPI.GetObject(context.Background(), minioMetaBucket, configFile, 0, -1, &buffer, "")
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if err != nil {
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// Ignore if err is ObjectNotFound or IncompleteBody when bucket is not configured with notification
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if isErrObjectNotFound(err) || isErrIncompleteBody(err) {
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return nil, xerrors.Trace(errNoSuchNotifications)
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}
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errorIf(err, "Unable to read file %v", configFile)
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return nil, err
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}
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// Return NoSuchNotifications on empty content.
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if buffer.Len() == 0 {
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return nil, xerrors.Trace(errNoSuchNotifications)
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}
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return &buffer, nil
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}
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func readNotificationConfig(objAPI ObjectLayer, bucketName string) (*event.Config, error) {
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// Construct path to notification.xml for the given bucket.
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configFile := path.Join(bucketConfigPrefix, bucketName, bucketNotificationConfig)
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// Get read lock.
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objLock := globalNSMutex.NewNSLock(minioMetaBucket, configFile)
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if err := objLock.GetRLock(globalOperationTimeout); err != nil {
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return nil, err
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}
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defer objLock.RUnlock()
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reader, err := readConfig(objAPI, configFile)
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if err != nil {
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return nil, err
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}
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return event.ParseConfig(reader, globalServerConfig.GetRegion(), globalNotificationSys.targetList)
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}
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func saveNotificationConfig(objAPI ObjectLayer, bucketName string, config *event.Config) error {
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data, err := xml.Marshal(config)
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if err != nil {
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return err
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}
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configFile := path.Join(bucketConfigPrefix, bucketName, bucketNotificationConfig)
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// Get write lock.
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objLock := globalNSMutex.NewNSLock(minioMetaBucket, configFile)
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if err := objLock.GetLock(globalOperationTimeout); err != nil {
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return err
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}
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defer objLock.Unlock()
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|
|
return saveConfig(objAPI, configFile, data)
|
|
}
|
|
|
|
// SaveListener - saves HTTP client currently listening for events to listener.json.
|
|
func SaveListener(objAPI ObjectLayer, bucketName string, eventNames []event.Name, pattern string, targetID event.TargetID, addr xnet.Host) error {
|
|
// listener.json is available/applicable only in DistXL mode.
|
|
if !globalIsDistXL {
|
|
return nil
|
|
}
|
|
|
|
// Construct path to listener.json for the given bucket.
|
|
configFile := path.Join(bucketConfigPrefix, bucketName, bucketListenerConfig)
|
|
transactionConfigFile := configFile + ".transaction"
|
|
|
|
// As object layer's GetObject() and PutObject() take respective lock on minioMetaBucket
|
|
// and configFile, take a transaction lock to avoid data race between readConfig()
|
|
// and saveConfig().
|
|
objLock := globalNSMutex.NewNSLock(minioMetaBucket, transactionConfigFile)
|
|
if err := objLock.GetLock(globalOperationTimeout); err != nil {
|
|
return err
|
|
}
|
|
defer objLock.Unlock()
|
|
|
|
reader, err := readConfig(objAPI, configFile)
|
|
if err != nil && !xerrors.IsErrIgnored(err, errDiskNotFound, errNoSuchNotifications) {
|
|
return err
|
|
}
|
|
|
|
listenerList := []ListenBucketNotificationArgs{}
|
|
if reader != nil {
|
|
if err = json.NewDecoder(reader).Decode(&listenerList); err != nil {
|
|
errorIf(err, "Unable to parse listener.json.")
|
|
return xerrors.Trace(err)
|
|
}
|
|
}
|
|
|
|
listenerList = append(listenerList, ListenBucketNotificationArgs{
|
|
EventNames: eventNames,
|
|
Pattern: pattern,
|
|
TargetID: targetID,
|
|
Addr: addr,
|
|
})
|
|
|
|
data, err := json.Marshal(listenerList)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
return saveConfig(objAPI, configFile, data)
|
|
}
|
|
|
|
// RemoveListener - removes HTTP client currently listening for events from listener.json.
|
|
func RemoveListener(objAPI ObjectLayer, bucketName string, targetID event.TargetID, addr xnet.Host) error {
|
|
// listener.json is available/applicable only in DistXL mode.
|
|
if !globalIsDistXL {
|
|
return nil
|
|
}
|
|
|
|
// Construct path to listener.json for the given bucket.
|
|
configFile := path.Join(bucketConfigPrefix, bucketName, bucketListenerConfig)
|
|
transactionConfigFile := configFile + ".transaction"
|
|
|
|
// As object layer's GetObject() and PutObject() take respective lock on minioMetaBucket
|
|
// and configFile, take a transaction lock to avoid data race between readConfig()
|
|
// and saveConfig().
|
|
objLock := globalNSMutex.NewNSLock(minioMetaBucket, transactionConfigFile)
|
|
if err := objLock.GetLock(globalOperationTimeout); err != nil {
|
|
return err
|
|
}
|
|
defer objLock.Unlock()
|
|
|
|
reader, err := readConfig(objAPI, configFile)
|
|
if err != nil && !xerrors.IsErrIgnored(err, errDiskNotFound, errNoSuchNotifications) {
|
|
return err
|
|
}
|
|
|
|
listenerList := []ListenBucketNotificationArgs{}
|
|
if reader != nil {
|
|
if err = json.NewDecoder(reader).Decode(&listenerList); err != nil {
|
|
errorIf(err, "Unable to parse listener.json.")
|
|
return xerrors.Trace(err)
|
|
}
|
|
}
|
|
|
|
if len(listenerList) == 0 {
|
|
// Nothing to remove.
|
|
return nil
|
|
}
|
|
|
|
activeListenerList := []ListenBucketNotificationArgs{}
|
|
for _, args := range listenerList {
|
|
if args.TargetID == targetID && args.Addr.Equal(addr) {
|
|
// Skip if matches
|
|
continue
|
|
}
|
|
|
|
activeListenerList = append(activeListenerList, args)
|
|
}
|
|
|
|
data, err := json.Marshal(activeListenerList)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
return saveConfig(objAPI, configFile, data)
|
|
}
|