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|
#!/bin/bash
set -e
if [ -d '/var/lib/mysql' ]; then
read -p 'mariadb seems to be installed already - I will remove it first.' -r s
if [ -n "${s}" ]; then
echo 'Aborted.'
exit
fi
sudo systemctl stop mysqld || true
sudo systemctl disable mysqld || true
sudo pacman -Rs mariadb || true
sudo rm -rf --one-file-system '/var/lib/mysql' '/etc/mysql'
fi
read -p 'enter new root-pw: ' -s -r root_pw
printf '\n'
read -p 'enter replikat-pw: ' -s -r replikat_pw
printf '\n'
sudo pacman -S --noconfirm mariadb
# set up mariadb
sudo mysql_install_db --user=mysql --basedir=/usr --datadir=/var/lib/mysql
sudo sed -i '
/^\s*\[mysqld]\s*$/ a group_concat_max_len = 4096 \
server-id = '"$RANDOM"' \
skip-networking
' '/etc/my.cnf.d/server.cnf'
sudo systemctl start mysqld
sudo systemctl enable mysqld
printf '\n\n\n%s\n%s\n\n\n\n\n' "${root_pw}" "${root_pw}" | \
sudo mysql_secure_installation
tmp_file=$(mktemp)
trap 'rm "${tmp_file}"' EXIT
database_dump=$(
ssh master@10.100.10.1 '
cd /data/backup/mysql;
ls -t
' \
| grep -xm1 'database-.*\.xz'
)
find /tmp \
-maxdepth 1 \
-type f \
-name "${database_dump}" \
-exec rsync -avP {} "${tmp_file}" \;
rsync -avP \
"master@10.100.10.1:/data/backup/mysql/${database_dump}" \
"${tmp_file}"
{
printf 'SHOW SLAVE STATUS;\n'
printf "CREATE USER 'webserver'@'localhost' IDENTIFIED BY 'empty';\n" \
printf "GRANT USAGE ON *.* TO 'webserver'@'localhost' IDENTIFIED BY 'empty';\n"
printf "GRANT REPLICATION CLIENT ON *.* TO 'webserver'@'localhost';\n"
printf 'GRANT %s ON buildmaster.* TO '"'"'webserver'"'"'@'"'"'localhost'"'"';\n' \
'CREATE TEMPORARY TABLES' \
'SELECT' \
'SHOW VIEW'
printf "CHANGE MASTER TO MASTER_HOST='%s', MASTER_PORT=%s, MASTER_USER='%s', MASTER_PASSWORD='%s';\n" \
'10.100.10.1' \
3306 \
'replikat' \
"${replikat_pw}"
pv "${tmp_file}" | xzcat
xzgrep -- '^-- CHANGE MASTER TO ' "${tmp_file}" | \
sed 's/^-- //'
printf 'START SLAVE;\n'
printf 'SHOW SLAVE STATUS;\n'
} | \
mysql -u root -p"${root_pw}"
printf '\n\nAll set up successfully.\n'
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