Install MySQL Community Server 5.7 via bash shell script in CentOS 7 (x64) - mysql

Question

I am trying to create a bash shell script to automate the installation of MySQL Community Server version 5.7 on CentOS 7 (x64).
I came across this lovely script https://github.com/mysql/mysql-docker/blob/mysql-server/5.7/docker-entrypoint.sh and put together the following:
#!/bin/sh
DATADIR="/var/lib/mysql"
MYSQL_ROOT_PASSWORD="$(pwmake 128)"
echo ' -> Removing previous mysql installation';
systemctl stop mysqld.service && yum remove -y mysql-community-server && rm -rf /var/lib/mysql && rm -rf /var/log/mysqld.log
echo ' -> Installing mysql database server';
yum localinstall -y https://dev.mysql.com/get/mysql57-community-release-el7-7.noarch.rpm
yum install -y mysql-community-server
echo ' -> Creating mysql data directory'
mkdir -p "$DATADIR"
chown -R mysql:mysql "$DATADIR"
echo ' -> Initializing mysql database'
mysqld --initialize-insecure=on --user=mysql --datadir="$DATADIR"
mysqld --user=mysql --datadir="$DATADIR" --skip-networking & pid="$!"
mysql=( mysql --protocol=socket -uroot )
for i in {30..0}; do
if echo 'SELECT 1' | "${mysql[#]}" &> /dev/null; then
break
fi
echo 'MySQL init process in progress ...'
sleep 1
done
if [ "$i" = 0 ]; then
echo >&2 'MySQL init process failed'
exit 1
fi
echo ' -> Setting mysql server root password';
mysql_tzinfo_to_sql /usr/share/zoneinfo | "${mysql[#]}" mysql
"${mysql[#]}" <<-EOSQL
SET ##SESSION.SQL_LOG_BIN=0;
DELETE FROM mysql.user where user != 'mysql.sys';
CREATE USER 'root'#'%' IDENTIFIED BY '${MYSQL_ROOT_PASSWORD}' ;
GRANT ALL ON *.* TO 'root'#'%' WITH GRANT OPTION ;
DROP DATABASE IF EXISTS test ;
FLUSH PRIVILEGES ;
EOSQL
if [ ! -z "$MYSQL_ROOT_PASSWORD" ]; then
mysql+=( -p"${MYSQL_ROOT_PASSWORD}" )
fi
if ! kill -s TERM "$pid" || ! wait "$pid"; then
echo >&2 'MySQL init process failed.'
exit 1
fi
chown -R mysql:mysql "$DATADIR"
echo " -> Mysql server setup completed, your root password: $MYSQL_ROOT_PASSWORD"
The script is supposed to do the following:
Removing previous mysql installation
Installing mysql database server
Creating mysql data directory & set ownership
Initializing mysql database
Setting mysql server root password
When I ran the script, this is the output I've got:
Total download size: 142 M
Installed size: 652 M
Downloading packages:
mysql-community-server-5.7.10-1.el7.x86_64.rpm | 142 MB 00:00:04
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
Installing : mysql-community-server-5.7.10-1.el7.x86_64 1/1
Verifying : mysql-community-server-5.7.10-1.el7.x86_64 1/1
Installed:
mysql-community-server.x86_64 0:5.7.10-1.el7
Complete!
-> Creating mysql data directory
-> Initializing mysql database
MySQL init process in progress ...
MySQL init process in progress ...
...snipped...
MySQL init process in progress ...
MySQL init process in progress ...
MySQL init process failed
I thought the steps in the script were pretty straight forward, yet it failed. Any ideas why it might be?

Answer 1

I have managed to achieve this by re-writing the shell script. This now works flawlessly for me :)
#!/bin/bash
mysqlRootPass="$(pwmake 128)"
echo ' -> Removing previous mysql server installation'
systemctl stop mysqld.service && yum remove -y mysql-community-server && rm -rf /var/lib/mysql && rm -rf /var/log/mysqld.log && rm -rf /etc/my.cnf
echo ' -> Installing mysql server (community edition)'
yum localinstall -y https://dev.mysql.com/get/mysql57-community-release-el7-7.noarch.rpm
yum install -y mysql-community-server
echo ' -> Starting mysql server (first run)'
systemctl enable mysqld.service
systemctl start mysqld.service
tempRootDBPass="`grep 'temporary.*root#localhost' /var/log/mysqld.log | tail -n 1 | sed 's/.*root#localhost: //'`"
echo ' -> Setting up new mysql server root password'
systemctl stop mysqld.service
rm -rf /var/lib/mysql/*logfile*
wget -O /etc/my.cnf "https://my-site.com/downloads/mysql/512MB.cnf"
systemctl start mysqld.service
mysqladmin -u root --password="$tempRootDBPass" password "$mysqlRootPass"
mysql -u root --password="$mysqlRootPass" -e <<-EOSQL
DELETE FROM mysql.user WHERE User='';
DROP DATABASE IF EXISTS test;
DELETE FROM mysql.db WHERE Db='test' OR Db='test\\_%';
DELETE FROM mysql.user where user != 'mysql.sys';
CREATE USER 'root'#'%' IDENTIFIED BY '${mysqlRootPass}';
GRANT ALL ON *.* TO 'root'#'%' WITH GRANT OPTION;
FLUSH PRIVILEGES;
EOSQL
systemctl status mysqld.service
echo " -> MySQL server installation completed, root password: $mysqlRootPass";

Answer 2

echo 'First step : Disabling and removing partially MariaDB'
yum remove MariaDB-common MariaDB-compat MariaDB-server
yum repolist enabled | grep "mariadb.*"
echo 'Removing Percona'
yum remove Percona-Server-client-55 Percona-Server-server-55
Percona- Server-shared-55.i686 percona-release
echo 'Last step : Removing completely mariadb'
yum remove mariadb mariadb-server
echo 'Removing mysql'
rm /etc/my.cnf
yum remove mysql-server mysql-libs mysql-devel mysql
echo 'Installing mysql assuming the rpm file is already download'
yum localinstall mysql57-community-release-el7-7.noarch.rpm
yum repolist enabled | grep "mysql.*-community.*"
yum install mysql-community-server
echo 'Starting mysql'
systemctl enable mysqld
systemctl start mysqld
echo 'Finally the root password needed for mysql to start'
echo 'oldpass will contain the temporary password value'
echo 'newpass must be written here and must meet Mysql Password Policies'
oldpass=$( grep 'temporary.*root#localhost' /var/log/mysqld.log |
tail -n 1 | sed 's/.*root#localhost: //' )
newpass="Password!"
mysqladmin -u root --password=${oldpass} password $newpass