centos8安装mysql.7 无法开机启动

问题遇到的现象和发生背景

centos8中安装mysql后，使用命令service mysqld start可以启动数据库，但是通过配置开机启动如下：
cp /usr/local/mysql/support-files/mysql.server /etc/rc.d/init.d/mysqld
chmod +x /etc/rc.d/init.d/mysqld
chkconfig --add mysqld
chkconfig --list mysqld
系统重启无法启动数据库

操作环境、软件版本等信息

操作系统为centos8,数据库为mysql-5.7.38-linux-glibc2.12-x86_64

尝试过的解决方法

关闭selinux之后，mysql可以启动，问题解决。
重新打开selinux;重启系统，数据库依然可以启动。
很懵--到底啥子问题啊，求各位给看下啊

我想要达到的结果

关闭selinux是我从网上找了很多之后实在没有办法下的尝试，我想要能够看到mysql无法启动的具体原因，学习下如何能够快速定位问题。
各位朋友，能帮我看下吗，还有能给推荐点比较好的一些运维知识吗，关于centos和mysql的

附上截图：
运行service mysqld start后，系统正常运行：

reboot系统重启后，mysql数据库无法开机启动，但是通过启动命令可以启动：

[[email protected] bin]# rebootConnection closing...Socket close.Connection closed by foreign host.Disconnected from remote host(10.3.27.1) at 11:42:46.Type `help' to learn how to use Xshell prompt.[D:\~]$ reconnectConnecting to 10.3.27.1:22...Connection established.To escape to local shell, press 'Ctrl+Alt+]'.WARNING! The remote SSH server rejected X11 forwarding request.Activate the web console with: systemctl enable --now cockpit.socketLast login: Mon Jun 27 11:33:13 2022 from 10.3.27.21[[email protected] ~]# ps -ef|grep mysqlroot        1617    1580  0 11:43 pts/0    00:00:00 grep --color=auto mysql[[email protected] ~]# systemctl status mysqld● mysqld.service - LSB: start and stop MySQL   Loaded: loaded (/etc/rc.d/init.d/mysqld; generated)   Active: active (exited) since Mon 2022-06-27 11:43:28 CST; 22s ago     Docs: man:systemd-sysv-generator(8)  Process: 1245 ExecStart=/etc/rc.d/init.d/mysqld start (code=exited, status=0/SUCCESS)Jun 27 11:43:28 localhost.localdomain systemd[1]: Starting LSB: start and stop MySQL...Jun 27 11:43:28 localhost.localdomain mysqld[1245]: /etc/rc.d/init.d/mysqld: line 239: /usr/local/mysql/bin/my_print_defaults: Permi>Jun 27 11:43:28 localhost.localdomain mysqld[1245]: Starting MySQL ERROR! Couldn't find MySQL server (/usr/local/mysql/bin/mysqld_sa>Jun 27 11:43:28 localhost.localdomain systemd[1]: Started LSB: start and stop MySQL.

将selinux关闭后，mysql数据库可开机启动：

# This file controls the state of SELinux on the system.# SELINUX= can take one of these three values:# enforcing - SELinux security policy is enforced.# permissive - SELinux prints warnings instead of enforcing.# disabled - No SELinux policy is loaded.SELINUX=disabled# SELINUXTYPE= can take one of these three values:# targeted - Targeted processes are protected,# minimum - Modification of targeted policy. Only selected processes are protected.# mls - Multi Level Security protection.SELINUXTYPE=targeted#将SELINUX关闭保存后重启[[email protected] ~]# rebootConnection closing...Socket close.Connection closed by foreign host.Disconnected from remote host(10.3.27.1) at 11:47:35.Type `help' to learn how to use Xshell prompt.[D:\~]$ reconnectConnecting to 10.3.27.1:22...Connection established.To escape to local shell, press 'Ctrl+Alt+]'.WARNING! The remote SSH server rejected X11 forwarding request.Activate the web console with: systemctl enable --now cockpit.socketLast login: Mon Jun 27 11:43:36 2022 from 10.3.27.21[[email protected] ~]# ps -ef|grep mysqlroot        1272       1  0 11:48 ?        00:00:00 /bin/sh /usr/local/mysql/bin/mysqld_safe --datadir=/data/mysql/3306/data --pid-file=/data/mysql/3306/log/mysql.pidmysql       2142    1272  2 11:48 ?        00:00:00 /usr/local/mysql/bin/mysqld --basedir=/usr/local/mysql --datadir=/data/mysql/3306/data --plugin-dir=/usr/local/mysql/lib/plugin --user=mysql --log-error=/data/mysql/3306/log/error.log --pid-file=/data/mysql/3306/log/mysql.pid --socket=/data/mysql/3306/tmp/mysql.sock --port=3306root        2313    2277  0 11:48 pts/0    00:00:00 grep --color=auto mysql[[email protected] ~]# systemctl status mysqld● mysqld.service - LSB: start and stop MySQL   Loaded: loaded (/etc/rc.d/init.d/mysqld; generated)   Active: active (running) since Mon 2022-06-27 11:48:18 CST; 23s ago     Docs: man:systemd-sysv-generator(8)  Process: 1238 ExecStart=/etc/rc.d/init.d/mysqld start (code=exited, status=0/SUCCESS)    Tasks: 28 (limit: 23364)   Memory: 201.6M   CGroup: /system.slice/mysqld.service           ├─1272 /bin/sh /usr/local/mysql/bin/mysqld_safe --datadir=/data/mysql/3306/data --pid-file=/data/mysql/3306/log/mysql.pid           └─2142 /usr/local/mysql/bin/mysqld --basedir=/usr/local/mysql --datadir=/data/mysql/3306/data --plugin-dir=/usr/local/mys>Jun 27 11:48:15 localhost.localdomain systemd[1]: Starting LSB: start and stop MySQL...Jun 27 11:48:18 localhost.localdomain mysqld[1238]: Starting MySQL... SUCCESS!Jun 27 11:48:18 localhost.localdomain systemd[1]: Started LSB: start and stop MySQL.

将selinux开启后，mysql数据库依然可以开机启动：

[[email protected] ~]# rebootConnection closing...Socket close.Connection closed by foreign host.Disconnected from remote host(10.3.27.1) at 11:51:03.Type `help' to learn how to use Xshell prompt.[D:\~]$ reconnectConnecting to 10.3.27.1:22...Connection established.To escape to local shell, press 'Ctrl+Alt+]'.WARNING! The remote SSH server rejected X11 forwarding request.Activate the web console with: systemctl enable --now cockpit.socketLast login: Mon Jun 27 11:48:29 2022 from 10.3.27.21[[email protected] ~]# ps -ef|grep mysqldroot        1255       1  0 11:54 ?        00:00:00 /bin/sh /usr/local/mysql/bin/mysqld_safe --datadir=/data/mysql/3306/data --pid-file=/data/mysql/3306/log/mysql.pidmysql       2141    1255  0 11:54 ?        00:00:06 /usr/local/mysql/bin/mysqld --basedir=/usr/local/mysql --datadir=/data/mysql/3306/data --plugin-dir=/usr/local/mysql/lib/plugin --user=mysql --log-error=/data/mysql/3306/log/error.log --pid-file=/data/mysql/3306/log/mysql.pid --socket=/data/mysql/3306/tmp/mysql.sock --port=3306root        2425    2388  0 13:22 pts/0    00:00:00 grep --color=auto mysqld

附上mysql配置文件：

[client]port = 3306socket = /data/mysql/3306/tmp/mysql.sock [mysqld]server-id = 1port = 3306basedir = /usr/local/mysqldatadir = /data/mysql/3306/datatmpdir  = /data/mysql/3306/tmpsocket = /data/mysql/3306/tmp/mysql.sockpid-file = /data/mysql/3306/log/mysql.pidskip_name_resolve = 1character-set-server = utf8mb4transaction_isolation = READ-COMMITTEDcollation-server = utf8mb4_general_ciinit_connect='SET NAMES utf8mb4'lower_case_table_names = 1max_connections = 400max_connect_errors = 1000explicit_defaults_for_timestamp = truemax_allowed_packet = 128Minteractive_timeout = 1800wait_timeout = 1800tmp_table_size = 16Mmax_heap_table_size = 128Mquery_cache_size = 0query_cache_type = 0read_buffer_size = 2Mread_rnd_buffer_size = 8Msort_buffer_size = 8Mbinlog_cache_size = 1M back_log = 130log_error = /data/mysql/3306/log/error.logslow_query_log = 1long_query_time = 1slow_query_log_file = /data/mysql/3306/log/slow.loglog_queries_not_using_indexes = 1log_throttle_queries_not_using_indexes = 5min_examined_row_limit = 100expire_logs_days = 5 log-bin = mysql-binbinlog_format = ROWbinlog_row_image = minimal # Innodb设置innodb_open_files = 500innodb_buffer_pool_size = 64Minnodb_log_buffer_size = 2Minnodb_flush_method = O_DIRECTinnodb_write_io_threads = 4innodb_read_io_threads = 4innodb_lock_wait_timeout = 120innodb_log_file_size = 32Msql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES

附上mysql安装过程：

[[email protected] ~]# mkdir /data[[email protected] ~]# cd /data/[[email protected] data]# mkdir software[[email protected] data]# groupadd mysql[[email protected] data]# useradd -g mysql mysql -d /data/mysql[[email protected] data]# passwd mysqlChanging password for user mysql.New password: BAD PASSWORD: The password is shorter than 8 charactersRetype new password: passwd: all authentication tokens updated successfully.[[email protected] data]# mkdir /data/mysql/3306/[[email protected] data]# mkdir /data/mysql/3306/data[[email protected] data]# mkdir /data/mysql/3306/log[[email protected] data]# mkdir /data/mysql/3306/tmp[[email protected] data]# cd /data/software/[[email protected] software]# tar -zxf mysql-5.7.38-linux-glibc2.12-x86_64.tar.gz [[email protected] software]# mv mysql-5.7.38-linux-glibc2.12-x86_64 /usr/local/[[email protected] software]# cd /usr/local/[[email protected] local]# ln -s mysql-5.7.38-linux-glibc2.12-x86_64 mysql[[email protected] local]# chown -R mysql:mysql mysql/[[email protected] local]# cd /etc/[[email protected] etc]# chown -R mysql:mysql /data/mysql[[email protected] etc]# cd /usr/local/mysql/bin/[[email protected] bin]# ./mysqld --initialize --user=mysql[[email protected] bin]# vi /data/mysql/3306/log/error.log[[email protected] bin]# cp /usr/local/mysql/support-files/mysql.server /etc/rc.d/init.d/mysqld[[email protected] bin]# chmod +x /etc/rc.d/init.d/mysqld[[email protected] bin]# chkconfig --add mysqld[[email protected] bin]# chkconfig --list mysqldNote: This output shows SysV services only and does not include native      systemd services. SysV configuration data might be overridden by native      systemd configuration.      If you want to list systemd services use 'systemctl list-unit-files'.      To see services enabled on particular target use      'systemctl list-dependencies [target]'.mysqld             0:off    1:off    2:on    3:on    4:on    5:on    6:off[[email protected] bin]# service mysqld startStarting MySQL.. SUCCESS! [[email protected] bin]# ps -ef|grep mysqlroot        5563       1  2 11:41 pts/0 00:00:00 /bin/sh /usr/local/mysql/bin/mysqld_safe --datadir=/data/mysql/3306/data --pid-file=/data/mysql/3306/log/mysql.pidmysql       6268    5563  8 11:41 pts/0 00:00:00 /usr/local/mysql/bin/mysqld --basedir=/usr/local/mysql --datadir=/data/mysql/3306/data --plugin-dir=/usr/local/mysql/lib/plugin --user=mysql --log-error=/data/mysql/3306/log/error.log --pid-file=/data/mysql/3306/log/mysql.pid --socket=/data/mysql/3306/tmp/mysql.sock --port=3306root        6298    5323  0 11:41 pts/0    00:00:00 grep --color=auto mysql[[email protected] bin]#