Add Validate() to serverConfig to call it at server startup and in Admin SetConfig handler to minimize errors scenario after server restart.
177 lines
4 KiB
Go
177 lines
4 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 target
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import (
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"encoding/json"
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"fmt"
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"net/url"
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"strings"
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"time"
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"github.com/garyburd/redigo/redis"
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"github.com/minio/minio/pkg/event"
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xnet "github.com/minio/minio/pkg/net"
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)
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// RedisArgs - Redis target arguments.
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type RedisArgs struct {
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Enable bool `json:"enable"`
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Format string `json:"format"`
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Addr xnet.Host `json:"address"`
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Password string `json:"password"`
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Key string `json:"key"`
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}
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// Validate RedisArgs fields
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func (r RedisArgs) Validate() error {
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if !r.Enable {
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return nil
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}
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if r.Format != "" {
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f := strings.ToLower(r.Format)
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if f != event.NamespaceFormat && f != event.AccessFormat {
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return fmt.Errorf("unrecognized format")
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}
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}
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if r.Key == "" {
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return fmt.Errorf("empty key")
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}
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return nil
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}
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// RedisTarget - Redis target.
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type RedisTarget struct {
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id event.TargetID
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args RedisArgs
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pool *redis.Pool
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}
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// ID - returns target ID.
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func (target *RedisTarget) ID() event.TargetID {
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return target.id
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}
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// Send - sends event to Redis.
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func (target *RedisTarget) Send(eventData event.Event) error {
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conn := target.pool.Get()
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defer func() {
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// FIXME: log returned error. ignore time being.
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_ = conn.Close()
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}()
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if target.args.Format == event.NamespaceFormat {
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objectName, err := url.QueryUnescape(eventData.S3.Object.Key)
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if err != nil {
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return err
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}
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key := eventData.S3.Bucket.Name + "/" + objectName
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if eventData.EventName == event.ObjectRemovedDelete {
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_, err = conn.Do("HDEL", target.args.Key, key)
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} else {
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var data []byte
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if data, err = json.Marshal(struct{ Records []event.Event }{[]event.Event{eventData}}); err != nil {
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return err
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}
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_, err = conn.Do("HSET", target.args.Key, key, data)
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}
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return err
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}
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if target.args.Format == event.AccessFormat {
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data, err := json.Marshal([]interface{}{eventData.EventTime, []event.Event{eventData}})
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if err != nil {
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return err
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}
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_, err = conn.Do("RPUSH", target.args.Key, data)
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return err
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}
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return nil
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}
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// Close - does nothing and available for interface compatibility.
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func (target *RedisTarget) Close() error {
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return nil
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}
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// NewRedisTarget - creates new Redis target.
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func NewRedisTarget(id string, args RedisArgs) (*RedisTarget, error) {
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pool := &redis.Pool{
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MaxIdle: 3,
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IdleTimeout: 2 * 60 * time.Second,
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Dial: func() (redis.Conn, error) {
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conn, err := redis.Dial("tcp", args.Addr.String())
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if err != nil {
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return nil, err
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}
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if args.Password == "" {
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return conn, nil
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}
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if _, err = conn.Do("AUTH", args.Password); err != nil {
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// FIXME: log returned error. ignore time being.
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_ = conn.Close()
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return nil, err
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}
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return conn, nil
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},
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TestOnBorrow: func(c redis.Conn, t time.Time) error {
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_, err := c.Do("PING")
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return err
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},
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}
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conn := pool.Get()
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defer func() {
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// FIXME: log returned error. ignore time being.
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_ = conn.Close()
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}()
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if _, err := conn.Do("PING"); err != nil {
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return nil, err
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}
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typeAvailable, err := redis.String(conn.Do("TYPE", args.Key))
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if err != nil {
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return nil, err
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}
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if typeAvailable != "none" {
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expectedType := "hash"
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if args.Format == event.AccessFormat {
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expectedType = "list"
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}
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if typeAvailable != expectedType {
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return nil, fmt.Errorf("expected type %v does not match with available type %v", expectedType, typeAvailable)
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}
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}
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return &RedisTarget{
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id: event.TargetID{id, "redis"},
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args: args,
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pool: pool,
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}, nil
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}
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