A bug concerning the validation of connectionString is found, however there is no solution to fix it for now, postgresql API doesn't help to do that hence disabling validation of that field.
267 lines
7.4 KiB
Go
267 lines
7.4 KiB
Go
/*
|
|
* Minio Cloud Storage, (C) 2018 Minio, Inc.
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
// PostgreSQL Notifier implementation. Two formats, "namespace" and
|
|
// "access" are supported.
|
|
//
|
|
// * Namespace format
|
|
//
|
|
// On each create or update object event in Minio Object storage
|
|
// server, a row is created or updated in the table in Postgres. On
|
|
// each object removal, the corresponding row is deleted from the
|
|
// table.
|
|
//
|
|
// A table with a specific structure (column names, column types, and
|
|
// primary key/uniqueness constraint) is used. The user may set the
|
|
// table name in the configuration. A sample SQL command that creates
|
|
// a table with the required structure is:
|
|
//
|
|
// CREATE TABLE myminio (
|
|
// key VARCHAR PRIMARY KEY,
|
|
// value JSONB
|
|
// );
|
|
//
|
|
// PostgreSQL's "INSERT ... ON CONFLICT ... DO UPDATE ..." feature
|
|
// (UPSERT) is used here, so the minimum version of PostgreSQL
|
|
// required is 9.5.
|
|
//
|
|
// * Access format
|
|
//
|
|
// On each event, a row is appended to the configured table. There is
|
|
// no deletion or modification of existing rows.
|
|
//
|
|
// A different table schema is used for this format. A sample SQL
|
|
// commant that creates a table with the required structure is:
|
|
//
|
|
// CREATE TABLE myminio (
|
|
// event_time TIMESTAMP WITH TIME ZONE NOT NULL,
|
|
// event_data JSONB
|
|
// );
|
|
|
|
package target
|
|
|
|
import (
|
|
"database/sql"
|
|
"encoding/json"
|
|
"fmt"
|
|
"net/url"
|
|
"strconv"
|
|
"strings"
|
|
"time"
|
|
|
|
"github.com/minio/minio/pkg/event"
|
|
xnet "github.com/minio/minio/pkg/net"
|
|
)
|
|
|
|
const (
|
|
psqlTableExists = `SELECT 1 FROM %s;`
|
|
psqlCreateNamespaceTable = `CREATE TABLE %s (key VARCHAR PRIMARY KEY, value JSONB);`
|
|
psqlCreateAccessTable = `CREATE TABLE %s (event_time TIMESTAMP WITH TIME ZONE NOT NULL, event_data JSONB);`
|
|
|
|
psqlUpdateRow = `INSERT INTO %s (key, value) VALUES ($1, $2) ON CONFLICT (key) DO UPDATE SET value = EXCLUDED.value;`
|
|
psqlDeleteRow = `DELETE FROM %s WHERE key = $1;`
|
|
psqlInsertRow = `INSERT INTO %s (event_time, event_data) VALUES ($1, $2);`
|
|
)
|
|
|
|
// PostgreSQLArgs - PostgreSQL target arguments.
|
|
type PostgreSQLArgs struct {
|
|
Enable bool `json:"enable"`
|
|
Format string `json:"format"`
|
|
ConnectionString string `json:"connectionString"`
|
|
Table string `json:"table"`
|
|
Host xnet.URL `json:"host"` // default: localhost
|
|
Port string `json:"port"` // default: 5432
|
|
User string `json:"user"` // default: user running minio
|
|
Password string `json:"password"` // default: no password
|
|
Database string `json:"database"` // default: same as user
|
|
}
|
|
|
|
// Validate PostgreSQLArgs fields
|
|
func (p PostgreSQLArgs) Validate() error {
|
|
if !p.Enable {
|
|
return nil
|
|
}
|
|
if p.Table == "" {
|
|
return fmt.Errorf("empty table name")
|
|
}
|
|
if p.Format != "" {
|
|
f := strings.ToLower(p.Format)
|
|
if f != event.NamespaceFormat && f != event.AccessFormat {
|
|
return fmt.Errorf("unrecognized format value")
|
|
}
|
|
}
|
|
|
|
if p.ConnectionString != "" {
|
|
// No pq API doesn't help to validate connection string
|
|
// prior connection, so no validation for now.
|
|
} else {
|
|
// Some fields need to be specified when ConnectionString is unspecified
|
|
if p.Port == "" {
|
|
return fmt.Errorf("unspecified port")
|
|
}
|
|
if _, err := strconv.Atoi(p.Port); err != nil {
|
|
return fmt.Errorf("invalid port")
|
|
}
|
|
if p.Database == "" {
|
|
return fmt.Errorf("database unspecified")
|
|
}
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
// PostgreSQLTarget - PostgreSQL target.
|
|
type PostgreSQLTarget struct {
|
|
id event.TargetID
|
|
args PostgreSQLArgs
|
|
updateStmt *sql.Stmt
|
|
deleteStmt *sql.Stmt
|
|
insertStmt *sql.Stmt
|
|
db *sql.DB
|
|
}
|
|
|
|
// ID - returns target ID.
|
|
func (target *PostgreSQLTarget) ID() event.TargetID {
|
|
return target.id
|
|
}
|
|
|
|
// Send - sends event to PostgreSQL.
|
|
func (target *PostgreSQLTarget) Send(eventData event.Event) error {
|
|
if target.args.Format == event.NamespaceFormat {
|
|
objectName, err := url.QueryUnescape(eventData.S3.Object.Key)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
key := eventData.S3.Bucket.Name + "/" + objectName
|
|
|
|
if eventData.EventName == event.ObjectRemovedDelete {
|
|
_, err = target.deleteStmt.Exec(key)
|
|
} else {
|
|
var data []byte
|
|
if data, err = json.Marshal(struct{ Records []event.Event }{[]event.Event{eventData}}); err != nil {
|
|
return err
|
|
}
|
|
|
|
_, err = target.updateStmt.Exec(key, data)
|
|
}
|
|
return err
|
|
}
|
|
|
|
if target.args.Format == event.AccessFormat {
|
|
eventTime, err := time.Parse(event.AMZTimeFormat, eventData.EventTime)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
data, err := json.Marshal(struct{ Records []event.Event }{[]event.Event{eventData}})
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
_, err = target.insertStmt.Exec(eventTime, data)
|
|
return err
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
// Close - closes underneath connections to PostgreSQL database.
|
|
func (target *PostgreSQLTarget) Close() error {
|
|
if target.updateStmt != nil {
|
|
// FIXME: log returned error. ignore time being.
|
|
_ = target.updateStmt.Close()
|
|
}
|
|
|
|
if target.deleteStmt != nil {
|
|
// FIXME: log returned error. ignore time being.
|
|
_ = target.deleteStmt.Close()
|
|
}
|
|
|
|
if target.insertStmt != nil {
|
|
// FIXME: log returned error. ignore time being.
|
|
_ = target.insertStmt.Close()
|
|
}
|
|
|
|
return target.db.Close()
|
|
}
|
|
|
|
// NewPostgreSQLTarget - creates new PostgreSQL target.
|
|
func NewPostgreSQLTarget(id string, args PostgreSQLArgs) (*PostgreSQLTarget, error) {
|
|
params := []string{args.ConnectionString}
|
|
if !args.Host.IsEmpty() {
|
|
params = append(params, "host="+args.Host.String())
|
|
}
|
|
if args.Port != "" {
|
|
params = append(params, "port="+args.Port)
|
|
}
|
|
if args.User != "" {
|
|
params = append(params, "user="+args.User)
|
|
}
|
|
if args.Password != "" {
|
|
params = append(params, "password="+args.Password)
|
|
}
|
|
if args.Database != "" {
|
|
params = append(params, "dbname="+args.Database)
|
|
}
|
|
connStr := strings.Join(params, " ")
|
|
|
|
db, err := sql.Open("postgres", connStr)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
if err = db.Ping(); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
if _, err = db.Exec(fmt.Sprintf(psqlTableExists, args.Table)); err != nil {
|
|
createStmt := psqlCreateNamespaceTable
|
|
if args.Format == event.AccessFormat {
|
|
createStmt = psqlCreateAccessTable
|
|
}
|
|
|
|
if _, err = db.Exec(fmt.Sprintf(createStmt, args.Table)); err != nil {
|
|
return nil, err
|
|
}
|
|
}
|
|
|
|
var updateStmt, deleteStmt, insertStmt *sql.Stmt
|
|
switch args.Format {
|
|
case event.NamespaceFormat:
|
|
// insert or update statement
|
|
if updateStmt, err = db.Prepare(fmt.Sprintf(psqlUpdateRow, args.Table)); err != nil {
|
|
return nil, err
|
|
}
|
|
// delete statement
|
|
if deleteStmt, err = db.Prepare(fmt.Sprintf(psqlDeleteRow, args.Table)); err != nil {
|
|
return nil, err
|
|
}
|
|
case event.AccessFormat:
|
|
// insert statement
|
|
if insertStmt, err = db.Prepare(fmt.Sprintf(psqlInsertRow, args.Table)); err != nil {
|
|
return nil, err
|
|
}
|
|
}
|
|
|
|
return &PostgreSQLTarget{
|
|
id: event.TargetID{id, "postgresql"},
|
|
args: args,
|
|
updateStmt: updateStmt,
|
|
deleteStmt: deleteStmt,
|
|
insertStmt: insertStmt,
|
|
db: db,
|
|
}, nil
|
|
}
|