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mysql_server.go
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mysql_server.go
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// Copyright 2018 PingCAP, 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,
// See the License for the specific language governing permissions and
// limitations under the License.
package check
import (
"context"
"database/sql"
"fmt"
"github.com/pingcap/tidb-tools/pkg/dbutil"
"github.com/pingcap/tidb-tools/pkg/utils"
)
// MySQLVersionChecker checks mysql/mariadb/rds,... version.
type MySQLVersionChecker struct {
db *sql.DB
dbinfo *dbutil.DBConfig
}
// NewMySQLVersionChecker returns a Checker
func NewMySQLVersionChecker(db *sql.DB, dbinfo *dbutil.DBConfig) Checker {
return &MySQLVersionChecker{db: db, dbinfo: dbinfo}
}
// MinVersion is mysql minimal version required
var MinVersion = [3]uint{5, 5, 0}
// Check implements the Checker interface.
// we only support version >= 5.5
func (pc *MySQLVersionChecker) Check(ctx context.Context) *Result {
result := &Result{
Name: pc.Name(),
Desc: "check whether mysql version is satisfied",
State: StateFailure,
Extra: fmt.Sprintf("address of db instance - %s:%d", pc.dbinfo.Host, pc.dbinfo.Port),
}
value, err := dbutil.ShowVersion(ctx, pc.db)
if err != nil {
markCheckError(result, err)
return result
}
version, err := toMySQLVersion(value)
if err != nil {
markCheckError(result, err)
return result
}
if !version.IsAtLeast(MinVersion) {
result.ErrorMsg = fmt.Sprintf("version required at least %v but got %v", MinVersion, version)
result.Instruction = "Please upgrade your database system"
return result
}
result.State = StateSuccess
return result
}
// Name implements the Checker interface.
func (pc *MySQLVersionChecker) Name() string {
return "mysql_version"
}
/*****************************************************/
// MySQLServerIDChecker checks mysql/mariadb server ID.
type MySQLServerIDChecker struct {
db *sql.DB
dbinfo *dbutil.DBConfig
}
// NewMySQLServerIDChecker returns a Checker
func NewMySQLServerIDChecker(db *sql.DB, dbinfo *dbutil.DBConfig) Checker {
return &MySQLServerIDChecker{db: db, dbinfo: dbinfo}
}
// Check implements the Checker interface.
func (pc *MySQLServerIDChecker) Check(ctx context.Context) *Result {
result := &Result{
Name: pc.Name(),
Desc: "check whether mysql server_id has been set > 1",
State: StateFailure,
Extra: fmt.Sprintf("address of db instance - %s:%d", pc.dbinfo.Host, pc.dbinfo.Port),
}
serverID, err := dbutil.ShowServerID(ctx, pc.db)
if err != nil {
if utils.OriginError(err) == sql.ErrNoRows {
result.ErrorMsg = "server_id not set"
result.Instruction = "please set server_id in your database"
} else {
markCheckError(result, err)
}
return result
}
if serverID == 0 {
result.ErrorMsg = "server_id is 0"
result.Instruction = "please set server_id greater than 0"
return result
}
result.State = StateSuccess
return result
}
// Name implements the Checker interface.
func (pc *MySQLServerIDChecker) Name() string {
return "mysql_server_id"
}