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#! /bin/bash
#
# Scripts to run by MySQL systemd service
#
# Needed argument: pre | post
#
# pre mode : try to run mysql_install_db and fix perms and SELinux contexts
# post mode : ping server until answer is received
#
install_db () {
# Note: something different than datadir=/var/lib/mysql requires SELinux policy changes (in enforcing mode)
datadir=$(/usr/bin/my_print_defaults server mysqld | grep '^--datadir=' | sed -n 's/--datadir=//p')
# Restore log, dir, perms and SELinux contexts
[ -d "$datadir" ] || install -d -m 0755 -omysql -gmysql "$datadir" || exit 1
log=/var/log/mysqld.log
[ -e $log ] || touch $log
chmod 0640 $log
chown mysql:mysql $log || exit 1
if [ -x /usr/sbin/restorecon ]; then
/usr/sbin/restorecon "$datadir"
/usr/sbin/restorecon $log
fi
# If special mysql dir is in place, skip db install
[ -d "$datadir/mysql" ] && exit 0
# Create initial db
/usr/bin/mysql_install_db --rpm --datadir="$datadir" --user=mysql
exit 0
}
pinger () {
# Wait for ping to answer to signal startup completed,
# might take a while in case of e.g. crash recovery
# MySQL systemd service will timeout script if no answer
while /bin/true ; do
sleep 1
mysqladmin ping >/dev/null 2>&1 && break
done
exit 0
}
# main
case $1 in
"pre") install_db ;;
"post") pinger ;;
esac
exit 0
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