本次在redhat8.7的系統上安裝MySQL5.7.37版本，關於一些啟動失敗的問題

MySQL包地址：

https://downloads.mysql.com/archives/get/p/23/file/mysql-5.7.37-el7-x86_64.tar.gz

安裝指令碼

#!/bin/bash
set -ex
###Mysql5.7二進位制包 指令碼安裝
##準備環境：一個足夠大的硬碟空間

## 變數檔案
#initdir=/app                ##基礎目錄
basedir=/usr/local/mysql         ## mysql安裝二進位制包目錄
datadir=/data/mysql        ## mysql資料目錄
logdir
 
=/var/log/mysql      ## mysql日誌檔案
bin_log=$datadir/binlog/mysql-bin
relay_log=$datadir/relay-log/mysql-relay
server_id=2
mysql_name=mysql-5.7.37-el7-x86_64

## 建立初始目錄、使用者
#mkdir -p $initdir

useradd -s /sbin/nologin mysql
## 清理mariadb環境
if     &>/dev/null ;then
   yum remove mariadb-libs -y
fi


# 安裝mysql
#wget $mysql_url
echo 
 
"正在解壓mysql"
tar -zxf $mysql_name.tar.gz
echo "解壓完畢"
sleep 2
mv $mysql_name  $basedir
chown -R mysql:mysql $basedir
if [ ! -d $datadir ];then
    mkdir -p $datadir
fi

chown -R mysql:mysql  $datadir
mkdir $logdir
chown -R mysql:mysql $logdir
echo "export basedir=$basedir" >> /etc/profile
echo 'export PATH=$basedir/bin:$PATH
 
' >> /etc/profile
source /etc/profile


## mysql初始化
mysqld --initialize-insecure  --user=mysql --basedir=$basedir --datadir=$datadir

mkdir -p $bin_log
mkdir -p $relay_log
chown -R mysql:mysql  $datadir
## mysql配置檔案
cat > /etc/my.cnf << EOF
[mysqld] 
basedir = $basedir 
datadir = $datadir 
pid-file = /tmp/mysql.pid 
socket = /tmp/mysql.sock 
port = 3306 
user = root 
log_error = $logdir/mysql-error.log
slow-query-log-file = $logdir/mysql-slow.log
log_bin = $bin_log
relay-log = $relay_log
server-id = ${server_id}
innodb_buffer_pool_size = 1024M 
innodb_log_buffer_size = 16M 
key_buffer_size = 128M 
query_cache_size = 256M 
tmp_table_size = 128M 
binlog_format = mixed 
skip-external-locking 
skip-name-resolve 
character-set-server = utf8 
collation-server = utf8_bin 
max_allowed_packet = 16M 
thread_cache_size = 256 
table_open_cache = 4096 
back_log = 1024 
max_connect_errors = 100000 
interactive_timeout = 1800 
wait_timeout = 1800 
max_connections = 500 
sort_buffer_size = 16M 
join_buffer_size = 4M 
read_buffer_size = 4M 
read_rnd_buffer_size = 16M 
binlog_cache_size = 2M 
thread_stack = 192K 
max_heap_table_size = 128M 
myisam_sort_buffer_size = 128M 
bulk_insert_buffer_size = 256M 
open_files_limit = 65535 
query_cache_limit = 2M 
slow-query-log 
long_query_time = 2 
expire_logs_days = 3 
max_binlog_size = 1000M 
slave_parallel_workers = 4 
log-slave-updates 
binlog_ignore_db = mysql 
replicate_wild_ignore_table = mysql.% 
sync_binlog = 1 
innodb_file_per_table = 1 
innodb_flush_method = O_DIRECT 
innodb_buffer_pool_instances = 4 
innodb_log_file_size = 512M 
innodb_log_files_in_group = 3 
innodb_open_files = 4000 
innodb_read_io_threads = 8 
innodb_write_io_threads = 8 
innodb_thread_concurrency = 8 
innodb_io_capacity = 2000 
innodb_io_capacity_max = 6000 
innodb_lru_scan_depth = 2000 
innodb_max_dirty_pages_pct = 85 
innodb_flush_log_at_trx_commit = 2 
sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES 
[mysqldump] 
quick 
quote-names 
max_allowed_packet = 16M 
[client] 
default-character-set = utf8 
[mysql] 
default-character-set = utf8 
[isamchk] 
key_buffer = 128M 
sort_buffer_size = 4M 
read_buffer = 2M 
write_buffer = 2M 
[myisamchk] 
key_buffer = 128M 
sort_buffer_size = 4M 
read_buffer = 2M 
write_buffer = 2M 
EOF

## 建立systemd管理檔案
cat > /etc/systemd/system/mysqld.service << EOF
[Unit] 
Description=MySQL Server 
Documentation=man:mysqld(8) 
Documentation=http://dev.mysql.com/doc/refman/en/using-systemd.html 
After=network.target 
After=syslog.target 
[Install] 
WantedBy=multi-user.target 
[Service] 
User=mysql 
Group=mysql
ExecStart=$basedir/bin/mysqld --defaults-file=/etc/my.cnf 
LimitNOFILE = 5000 
EOF
systemctl daemon-reload
systemctl start mysqld
systemctl enable mysqld
systemctl status mysqld

 安裝都照常進行，到最後，無法啟動（這個其實由於粗心引起的）

報錯為：

 這個許可權問題其實是selinux導致的，關閉selinux即可

setenforce 0
vim /etc/selinux/config
# 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=enforcing
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

主要是一下問題，登陸的時候出現該報錯

 查詢半天后，解決方法如下：

yum install libncurs* -y

rm -f /usr/lib64/libtinfo.so.5
ln -s /usr/lib64/libtinfo.so.6.1 /usr/lib64/libtinfo.so.5

rm -f rm -f /lib64/libncurses.so.5
ln -s /lib64/libncurses.so.6.1 /lib64/libncurses.so.5

主要應該是一些類包版本的問題，具體原因還未深究，待有時間深究一下