어제 NAS를 다시 시작한 후 오늘 아침에 NAS가 다시 충돌하는 것을 발견했습니다. 강제로 종료하고 다시 시작할 수만 있습니다.
docker 컨테이너를 시작하기 전, mysql 컨테이너의 메모리를 512M으로 조정했습니다. 그러다가 비극적으로 시작할 수 없다는 것을 알게 되었습니다. 나중에 알고 보니 시작하지 못한 이유는 메모리 조정 때문이 아니었습니다.
로그를 보면 다음과 같이 표시됩니다.
2020-12-27T02:43:53.375776Z 0 mysqld: [경고] 세계 쓰기 가능 구성 파일 '/etc/mysql/my.cnf'는 무시됩니다.
2020 -12-27T02 :43:53.375776Z 0 mysqld: '/var/lib/mysql-files'의 realpath() 오류(오류 2 - 해당 파일 또는 디렉터리 없음)
2020-12-27T02:43:53.375776Z 0 [ERROR] [ MY-010095] [서버] --secure-file-priv에 대한 디렉터리에 액세스하지 못했습니다. 디렉터리가 존재하고 MySQL 서버에서 액세스할 수 있는지 확인하세요. 제공되는 값: /var/lib/mysql-files
2020 -12-27T02 :43:53.376005Z 0 [ERROR] [MY-010119] [Server] Aborting
Baidu, 해결 방법은 mysql 컨테이너를 다시 실행하고 이전 컨테이너에 -v /mnt/md0을 추가하는 것입니다. 구성 /User/wzp/home/www/mysql-files:/var/lib/mysql-files/. -v /mnt/md0/User/wzp/home/www/mysql-files:/var/lib/mysql-files/。
现在问题来了，之前run mysql容器时，我并没有记录下完整的run 命令。还好，通过rekcod工具可以查看。更喜的是，这个工具可以通过docker来运行。因为我的NAS的系统不是发行版的linux，npm，yum好多工具都没法安装。
关于rekcod的使用可以参考linuxea:如何复现查看docker run参数命令
简单来说，用法如下：
1 docker 安装rekcod
$ docker pull nexdrew/rekcod $ alias rekcod="docker run --rm -v /var/run/docker.sock:/var/run/docker.sock nexdrew/rekcod"
2 使用方法：
[root@TNAS-012664 ~]# rekcod mysql ==>mysql是我的容器名 docker run --name mysql --runtime runc -v /mnt/md0/User/wzp/home/www/mysql/:/var/lib/mysql -p 3306:3306/tcp --net bridge --restart no -h 39964e9e508a --expose 3306/tcp --expose 33060/tcp -e 'MYSQL_ROOT_PASSWORD=123456' -e 'PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin' -e 'GOSU_VERSION=1.12' -e 'MYSQL_MAJOR=5.7' -e 'MYSQL_VERSION=5.7.30-1debian10' -d -t -i --entrypoint "docker-entrypoint.sh" mysql 'mysqld'
可以看到我的数据库文件都是放在/mnt/md0/User/wzp/home/www/mysql/目录下，我查看了下该目录文件，数据应该是没有丢失的。
于是，我新建了mysql2 容器，命令如下docker run -d -p 3306:3306 -e MYSQL_ROOT_PASSWORD=123456 --name mysql2 -v /mnt/md0/User/wzp/home/www/mysql/:/var/lib/mysql -v /mnt/md0/User/wzp/home/www/mysql-files:/var/lib/mysql-files/ mysql
然后，进入mysql2，发现没法连接数据库docker exec -it mysql2 /bin/bash
查看mysql 状态
root@0e83698acbfb:/# mysqld status mysqld: [Warning] World-writable config file '/etc/mysql/conf.d/docker.cnf' is ignored. mysqld: [Warning] World-writable config file '/etc/mysql/conf.d/mysql.cnf' is ignored. 2020-12-27T02:39:41.865252Z 0 [Warning] [MY-011070] [Server] 'Disabling symbolic links using --skip-symbolic-links (or equivalent) is the default. Consider not using this option as it' is deprecated and will be removed in a future release. 2020-12-27T02:39:41.865455Z 0 [System] [MY-010116] [Server] /usr/sbin/mysqld (mysqld 8.0.20) starting as process 105 2020-12-27T02:39:41.871715Z 0 [ERROR] [MY-010123] [Server] Fatal error: Please read "Security" section of the manual to find out how to run mysqld as root! 2020-12-27T02:39:41.872541Z 0 [ERROR] [MY-010119] [Server] Aborting 2020-12-27T02:39:41.872776Z 0 [System] [MY-010910] [Server] /usr/sbin/mysqld: Shutdown complete (mysqld 8.0.20) MySQL Community Server - GPL. root@0e83698acbfb:/# Fatal error: Please read "Security" section of the manual to find out how to run mysqld as root!^C
用以下方法以root方式启动mysqld
root@0e83698acbfb:/# mysqld --user=root mysqld: [Warning] World-writable config file '/etc/mysql/conf.d/docker.cnf' is ignored. mysqld: [Warning] World-writable config file '/etc/mysql/conf.d/mysql.cnf' is ignored. 2020-12-27T02:40:57.169719Z 0 [Warning] [MY-011070] [Server] 'Disabling symbolic links using --skip-symbolic-links (or equivalent) is the default. Consider not using this option as it' is deprecated and will be removed in a future release. 2020-12-27T02:40:57.169896Z 0 [System] [MY-010116] [Server] /usr/sbin/mysqld (mysqld 8.0.20) starting as process 116 2020-12-27T02:40:57.184807Z 1 [System] [MY-013576] [InnoDB] InnoDB initialization has started. 2020-12-27T02:40:57.241048Z 1 [ERROR] [MY-012574] [InnoDB] Unable to lock ./ibdata1 error: 11 2020-12-27T02:40:58.241783Z 1 [ERROR] [MY-012574] [InnoDB] Unable to lock ./ibdata1 error: 11 2020-12-27T02:40:59.242983Z 1 [ERROR] [MY-012574] [InnoDB] Unable to lock ./ibdata1 error: 11 2020-12-27T02:41:00.244290Z 1 [ERROR] [MY-012574] [InnoDB] Unable to lock ./ibdata1 error: 11 2020-12-27T02:41:01.245762Z 1 [ERROR] [MY-012574] [InnoDB] Unable to lock ./ibdata1 error: 11 2020-12-27T02:41:02.247539Z 1 [ERROR] [MY-012574] [InnoDB] Unable to lock ./ibdata1 error: 11
屏幕一直打印Unable to lock ./ibdata1 error: 11，只能CTRL-C强制中断。百度了下，有两个方式来解决该问题
1 参考mysql之 [ERROR] InnoDB: Unable to lock ./ibdata1, error: 11
该文章分析，导致该error主要是以下两个原因，很可惜，文章中的方法并不能解决我的问题。
- 磁盘空间目录不足
- ibdata1 文件被其他的进程占用
2 参考mysqld报InnoDB: Unable to lock ./ibdata1 error: 11这篇文章完美解决了我的问题。主要进行了以下操作。
2.1 首先，进入我的mysql数据库所在目录cd /mnt/md0/User/wzp/home/www/mysql
1 Docker install rekcod
[root@TNAS-012664 www]# cd /mnt/md0/User/wzp/home/www/mysql/ [root@TNAS-012664 mysql]# ls auto.cnf binlog.index client-key.pem dci '#ib_16384_0.dblwr' ib_logfile0 mautic nianbao performance_schema robot shangbiao undo_001 zeng baike ca-key.pem company_works dianzicaipiao '#ib_16384_1.dblwr' ib_logfile1 mysql niuwan private_key.pem sara_wiki sjzt_ry6 undo_002 bigdatapaltfrom ca.pem copyrightdata gs_data ib_buffer_pool '#innodb_temp' mysql.ibd pachong public_key.pem server-cert.pem sys wenshu binlog.000001 client-cert.pem db_huayun hy_dci_admin ibdata1 integrate mysql_upgrade_info pachong2 qianliu_wiki server-key.pem ucenter_huayunyy yuanqixiaoshuo [root@TNAS-012664 mysql]# mv ibdata1 ibdata1.bak [root@TNAS-012664 mysql]# mv ib_logfile0 ib_logfile0.bak [root@TNAS-012664 mysql]# mv ib_logfile1 ib_logfile1.bak [root@TNAS-012664 mysql]# cp -a ibdata1.bak ibdata1 [root@TNAS-012664 mysql]# cp -a ib_logfile0.bak ib_logfile0 [root@TNAS-012664 mysql]# cp -a ib_logfile1.bak ib_logfile1
2 사용 방법:
[root@TNAS-012664 ~]# docker run -d -p 3306:3306 -e MYSQL_ROOT_PASSWORD=123456 --name mysql2 -v /mnt/md0/User/wzp/home/www/mysql/:/var/lib/mysql -v /mnt/md0/User/wzp/home/www/mysql-files:/var/lib/mysql-files/ mysql 1e031247ea46e82f6205db68e7fb1b55389c87e5e2cb13517f9e1ac17d514509 [root@TNAS-012664 ~]# docker exec -it mysql2 /bin/bash root@1e031247ea46:/# mysql -uroot -p mysql: [Warning] World-writable config file '/etc/mysql/my.cnf' is ignored. Enter password: Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 8 Server version: 8.0.20 MySQL Community Server - GPL Copyright (c) 2000, 2020, Oracle and/or its affiliates. All rights reserved. Oracle is a registered trademark of Oracle Corporation and/or its affiliates. Other names may be trademarks of their respective owners. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement. mysql> show databases;
내 데이터베이스 파일을 볼 수 있습니다. 모두 /mnt/md0/User/wzp/home/www/mysql/ 디렉토리에 있습니다. 디렉토리 파일을 확인했는데 데이터가 손실되지 않아야 합니다.
그래서 새로운 mysql2 컨테이너를 생성했는데, 명령어는 다음과 같다
docker run -d -p 3306:3306 -e MYSQL_ROOT_PASSWORD=123456 --name mysql2 -v /mnt/md0/User/wzp/home /www/mysql /:/var/lib/mysql -v /mnt/md0/User/wzp/home/www/mysql-files:/var/lib/mysql-files/ mysql그런 다음 다음을 입력하십시오. mysql2에 데이터베이스에 연결하는 방법