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Code Issues Packages Projects Releases Wiki Activity

Database gRPC plugins (#3666)

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* Start work on context aware backends

* Start work on moving the database plugins to gRPC in order to pass context

* Add context to builtin database plugins

* use byte slice instead of string

* Context all the things

* Move proto messages to the dbplugin package

* Add a grpc mechanism for running backend plugins

* Serve the GRPC plugin

* Add backwards compatibility to the database plugins

* Remove backend plugin changes

* Remove backend plugin changes

* Cleanup the transport implementations

* If grpc connection is in an unexpected state restart the plugin

* Fix tests

* Fix tests

* Remove context from the request object, replace it with context.TODO

* Add a test to verify netRPC plugins still work

* Remove unused mapstructure call

* Code review fixes

* Code review fixes

* Code review fixes
This commit is contained in:
Brian Kassouf
2017-12-14 14:03:11 -08:00
committed by GitHub
parent 2ce0984e00
commit a401cc7cb5
35 changed files with 1425 additions and 390 deletions
Download Patch File Download Diff File Expand all files Collapse all files

29
plugins/database/mysql/mysql.go
View File

@@ -1,6 +1,7 @@
package mysql
import (
"context"
"database/sql"
"strings"
"time"
@@ -30,6 +31,8 @@ var (
LegacyUsernameLen int = 16
)
var _ dbplugin.Database = &MySQL{}
type MySQL struct {
connutil.ConnectionProducer
credsutil.CredentialsProducer
@@ -88,8 +91,8 @@ func (m *MySQL) Type() (string, error) {
return mySQLTypeName, nil
}
func (m *MySQL) getConnection() (*sql.DB, error) {
db, err := m.Connection()
func (m *MySQL) getConnection(ctx context.Context) (*sql.DB, error) {
db, err := m.Connection(ctx)
if err != nil {
return nil, err
}
@@ -97,13 +100,13 @@ func (m *MySQL) getConnection() (*sql.DB, error) {
return db.(*sql.DB), nil
}
func (m *MySQL) CreateUser(statements dbplugin.Statements, usernameConfig dbplugin.UsernameConfig, expiration time.Time) (username string, password string, err error) {
func (m *MySQL) CreateUser(ctx context.Context, statements dbplugin.Statements, usernameConfig dbplugin.UsernameConfig, expiration time.Time) (username string, password string, err error) {
// Grab the lock
m.Lock()
defer m.Unlock()
// Get the connection
db, err := m.getConnection()
db, err := m.getConnection(ctx)
if err != nil {
return "", "", err
}
@@ -128,7 +131,7 @@ func (m *MySQL) CreateUser(statements dbplugin.Statements, usernameConfig dbplug
}
// Start a transaction
tx, err := db.Begin()
tx, err := db.BeginTx(ctx, nil)
if err != nil {
return "", "", err
}
@@ -146,7 +149,7 @@ func (m *MySQL) CreateUser(statements dbplugin.Statements, usernameConfig dbplug
"expiration": expirationStr,
})
stmt, err := tx.Prepare(query)
stmt, err := tx.PrepareContext(ctx, query)
if err != nil {
// If the error code we get back is Error 1295: This command is not
// supported in the prepared statement protocol yet, we will execute
@@ -155,7 +158,7 @@ func (m *MySQL) CreateUser(statements dbplugin.Statements, usernameConfig dbplug
// prepare supported commands. If there is no error when running we
// will continue to the next statement.
if e, ok := err.(*stdmysql.MySQLError); ok && e.Number == 1295 {
_, err = tx.Exec(query)
_, err = tx.ExecContext(ctx, query)
if err != nil {
return "", "", err
}
@@ -165,7 +168,7 @@ func (m *MySQL) CreateUser(statements dbplugin.Statements, usernameConfig dbplug
return "", "", err
}
defer stmt.Close()
if _, err := stmt.Exec(); err != nil {
if _, err := stmt.ExecContext(ctx); err != nil {
return "", "", err
}
}
@@ -179,17 +182,17 @@ func (m *MySQL) CreateUser(statements dbplugin.Statements, usernameConfig dbplug
}
// NOOP
func (m *MySQL) RenewUser(statements dbplugin.Statements, username string, expiration time.Time) error {
func (m *MySQL) RenewUser(ctx context.Context, statements dbplugin.Statements, username string, expiration time.Time) error {
return nil
}
func (m *MySQL) RevokeUser(statements dbplugin.Statements, username string) error {
func (m *MySQL) RevokeUser(ctx context.Context, statements dbplugin.Statements, username string) error {
// Grab the read lock
m.Lock()
defer m.Unlock()
// Get the connection
db, err := m.getConnection()
db, err := m.getConnection(ctx)
if err != nil {
return err
}
@@ -201,7 +204,7 @@ func (m *MySQL) RevokeUser(statements dbplugin.Statements, username string) erro
}
// Start a transaction
tx, err := db.Begin()
tx, err := db.BeginTx(ctx, nil)
if err != nil {
return err
}
@@ -217,7 +220,7 @@ func (m *MySQL) RevokeUser(statements dbplugin.Statements, username string) erro
// 1295: This command is not supported in the prepared statement protocol yet
// Reference https://mariadb.com/kb/en/mariadb/prepare-statement/
query = strings.Replace(query, "{{name}}", username, -1)
_, err = tx.Exec(query)
_, err = tx.ExecContext(ctx, query)
if err != nil {
return err
}