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目录

1、修改配置文件

2、停止tidb-server

3、以root方式启动脚本

4、修改密码

5、停止脚本重启服务

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1、修改配置文件

进入tidb-server默认部署位置

#切换tidb账号
su tidb# 进入tidb-server部署路径
cd /tidb-deploy/tidb-4000# 修改配置
vim ./conf/tidb.toml

添加内容

[security]

skip-grant-table = true

2、停止tidb-server

#
tiup cluster display tidb-test# 只停止 tidb-server 服务
tiup cluster stop tidb-test -R tidb

3、以root方式启动脚本

修改完配置后，不能以 tiup cluster 命令方式启动，否则会出现启动失败

1）异常如下

Error: failed to start tidb: failed to start: 192.168.20.113 tidb-4000.service, please check the instance's log(/tidb-deploy/tidb-4000/log) for more detail.: timed out waiting for port 4000 to be started after 2m0s

"code": 1, "error": "failed to start tidb: failed to start: 192.168.20.113 tidb-4000.service, please check the instance's log(/tidb-deploy/tidb-4000/log) for more detail.: timed out waiting for port 4000 to be started after 2m0s", "errorVerbose": "timed out waiting for port 4000 to be started after 2m0s\ngithub.com/pingcap/tiup/pkg/cluster/module.(*WaitFor).Execute\n\tgithub.com/pingcap/tiup/pkg/cluster/module/wait_for.go:92\ngithub.com/pingcap/tiup/pkg/cluster/spec.PortStarted\n\tgithub.com/pingcap/tiup/pkg/cluster/spec/instance.go:129\ngithub.com/pingcap/tiup/pkg/cluster/spec.(*BaseInstance).Ready\n\tgithub.com/pingcap/tiup/pkg/cluster/spec/instance.go:167\ngithub.com/pingcap/tiup/pkg/cluster/operation.startInstance\n\tgithub.com/pingcap/tiup/pkg/cluster/operation/action.go:405\ngithub.com/pingcap/tiup/pkg/cluster/operation.StartComponent.func1\n\tgithub.com/pingcap/tiup/pkg/cluster/operation/action.go:535\ngolang.org/x/sync/errgroup.(*Group).Go.func1\n\tgolang.org/x/sync@v0.1.0/errgroup/errgroup.go:75\nruntime.goexit\n\truntime/asm_amd64.s:1650\nfailed to start: 192.168.20.113 tidb-4000.service, please check the instance's log(/tidb-deploy/tidb-4000/log) for more detail.\nfailed to start tidb"}

2）如果出现异常退出后，再次执行出现如下错误

[terror.go:309] ["unexpected error"] [error="fslock: lock is held"] [stack="github.com/pingcap/tidb/pkg/parser/terror.MustNil\n\t/workspace/source/tidb/pkg/parser/terror/terror.go:309\nmain.main\n\t/workspace/source/tidb/cmd/tidb-server/main.go:288\nruntime.main\n\t/usr/local/go/src/runtime/proc.go:267"] [stack="github.com/pingcap/tidb/pkg/parser/terror.MustNil\n\t/workspace/source/tidb/pkg/parser/terror/terror.go:309\nmain.main\n\t/workspace/source/tidb/cmd/tidb-server/main.go:288\nruntime.main\n\t/usr/local/go/src/runtime/proc.go:267"]
 

 通过查找进程的方式，kill的对应程序，然后重启

ps -ef|grep run_tidbkill -9 181877sudo sh run_tidb.sh

正确处理方式

su tidbcd /tidb-deploy/tidb-4000/scripts# 必须以root方式启动
sudo sh run_tidb.sh

启动完后，保持窗口不要关闭，开启新的窗口进行后续操作。

4、修改密码

可以使用命令行的方式访问数据库

mysql -h 127.0.0.1 -P 4000 -u root

或者借助Navicat工具访问

注意需要切换到mysql 实例

然后可以通过 SET PASSWORD FOR 或者 ALTER USER 语句完成：

SET PASSWORD FOR 'root'@'%' = 'mypass';

或者执行 

ALTER USER 'root'@'%' IDENTIFIED BY 'mypass';

5、停止脚本重启服务

1）将1中的tidb.toml 配置添加的内容移除

2）停止3中的run_tidb.sh脚本

3）重启tidb-server

tiup cluster start tidb-test -R tidb

最后检查服务是否运行正常

参考文章：

TiDB 用户账户管理 | PingCAP 文档中心