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#!/bin/bash
set -m
set -e
VOLUME_HOME="/var/lib/mysql"
CONF_FILE="/etc/mysql/conf.d/my.cnf"
LOG="/var/log/mysql/error.log"
# Set permission of config file
chmod 644 ${CONF_FILE}
chmod 644 /etc/mysql/conf.d/mysqld_charset.cnf
StartMySQL ()
{
/usr/bin/mysqld_safe ${EXTRA_OPTS} > /dev/null 2>&1 &
# Time out in 1 minute
LOOP_LIMIT=60
for (( i=0 ; ; i++ )); do
if [ ${i} -eq ${LOOP_LIMIT} ]; then
echo "Time out. Error log is shown as below:"
tail -n 100 ${LOG}
exit 1
fi
echo "=> Waiting for confirmation of MySQL service startup, trying ${i}/${LOOP_LIMIT} ..."
sleep 1
mysql -uroot -e "status" > /dev/null 2>&1 && break
done
}
CreateMySQLUser()
{
if [ "$MYSQL_PASS" = "**Random**" ]; then
unset MYSQL_PASS
fi
PASS=${MYSQL_PASS:-$(pwgen -s 12 1)}
_word=$( [ ${MYSQL_PASS} ] && echo "preset" || echo "random" )
echo "=> Creating MySQL user ${MYSQL_USER} with ${_word} password"
mysql -uroot -e "CREATE USER '${MYSQL_USER}'@'%' IDENTIFIED BY '$PASS'"
mysql -uroot -e "GRANT ALL PRIVILEGES ON *.* TO '${MYSQL_USER}'@'%' WITH GRANT OPTION"
echo "=> Done!"
echo "========================================================================"
echo "You can now connect to this MySQL Server using:"
echo ""
echo " mysql -u$MYSQL_USER -p$PASS -h<host> -P<port>"
echo ""
echo "Please remember to change the above password as soon as possible!"
echo "MySQL user 'root' has no password but only allows local connections"
echo "========================================================================"
}
OnCreateDB()
{
if [ "$ON_CREATE_DB" = "**False**" ]; then
unset ON_CREATE_DB
else
echo "Creating MySQL database ${ON_CREATE_DB}"
mysql -uroot -e "CREATE DATABASE IF NOT EXISTS ${ON_CREATE_DB};"
echo "Database created!"
fi
}
ImportSql()
{
for FILE in ${STARTUP_SQL}; do
echo "=> Importing SQL file ${FILE}"
if [ "$ON_CREATE_DB" ]; then
mysql -uroot "$ON_CREATE_DB" < "${FILE}"
else
mysql -uroot < "${FILE}"
fi
done
}
# Main
if [ ${REPLICATION_MASTER} == "**False**" ]; then
unset REPLICATION_MASTER
fi
if [ ${REPLICATION_SLAVE} == "**False**" ]; then
unset REPLICATION_SLAVE
fi
# Initialize empty data volume and create MySQL user
if [[ ! -d $VOLUME_HOME/mysql ]]; then
echo "=> An empty or uninitialized MySQL volume is detected in $VOLUME_HOME"
echo "=> Installing MySQL ..."
if [ ! -f /usr/share/mysql/my-default.cnf ] ; then
cp /etc/mysql/my.cnf /usr/share/mysql/my-default.cnf
fi
mysql_install_db || exit 1
touch /var/lib/mysql/.EMPTY_DB
echo "=> Done!"
else
echo "=> Using an existing volume of MySQL"
fi
# Set MySQL REPLICATION - MASTER
if [ -n "${REPLICATION_MASTER}" ]; then
echo "=> Configuring MySQL replication as master (1/2) ..."
if [ ! -f /replication_set.1 ]; then
RAND="$(date +%s | rev | cut -c 1-2)$(echo ${RANDOM})"
echo "=> Writting configuration file '${CONF_FILE}' with server-id=${RAND}"
sed -i "s/^#server-id.*/server-id = ${RAND}/" ${CONF_FILE}
sed -i "s/^#log-bin.*/log-bin = mysql-bin/" ${CONF_FILE}
touch /replication_set.1
else
echo "=> MySQL replication master already configured, skip"
fi
fi
# Set MySQL REPLICATION - SLAVE
if [ -n "${REPLICATION_SLAVE}" ]; then
echo "=> Configuring MySQL replication as slave (1/2) ..."
if [ -n "${MYSQL_PORT_3306_TCP_ADDR}" ] && [ -n "${MYSQL_PORT_3306_TCP_PORT}" ]; then
if [ ! -f /replication_set.1 ]; then
RAND="$(date +%s | rev | cut -c 1-2)$(echo ${RANDOM})"
echo "=> Writting configuration file '${CONF_FILE}' with server-id=${RAND}"
sed -i "s/^#server-id.*/server-id = ${RAND}/" ${CONF_FILE}
sed -i "s/^#log-bin.*/log-bin = mysql-bin/" ${CONF_FILE}
touch /replication_set.1
else
echo "=> MySQL replication slave already configured, skip"
fi
else
echo "=> Cannot configure slave, please link it to another MySQL container with alias as 'mysql'"
exit 1
fi
fi
echo "=> Starting MySQL ..."
StartMySQL
tail -F $LOG &
# Create admin user and pre create database
if [ -f /var/lib/mysql/.EMPTY_DB ]; then
echo "=> Creating admin user ..."
CreateMySQLUser
OnCreateDB
rm /var/lib/mysql/.EMPTY_DB
fi
# Import Startup SQL
if [ -n "${STARTUP_SQL}" ]; then
if [ ! -f /sql_imported ]; then
echo "=> Initializing DB with ${STARTUP_SQL}"
ImportSql
touch /sql_imported
fi
fi
# Set MySQL REPLICATION - MASTER
if [ -n "${REPLICATION_MASTER}" ]; then
echo "=> Configuring MySQL replication as master (2/2) ..."
if [ ! -f /replication_set.2 ]; then
echo "=> Creating a log user ${REPLICATION_USER}:${REPLICATION_PASS}"
mysql -uroot -e "CREATE USER '${REPLICATION_USER}'@'%' IDENTIFIED BY '${REPLICATION_PASS}'"
mysql -uroot -e "GRANT REPLICATION SLAVE ON *.* TO '${REPLICATION_USER}'@'%'"
mysql -uroot -e "reset master"
echo "=> Done!"
touch /replication_set.2
else
echo "=> MySQL replication master already configured, skip"
fi
fi
# Set MySQL REPLICATION - SLAVE
if [ -n "${REPLICATION_SLAVE}" ]; then
echo "=> Configuring MySQL replication as slave (2/2) ..."
if [ -n "${MYSQL_PORT_3306_TCP_ADDR}" ] && [ -n "${MYSQL_PORT_3306_TCP_PORT}" ]; then
if [ ! -f /replication_set.2 ]; then
echo "=> Setting master connection info on slave"
mysql -uroot -e "CHANGE MASTER TO MASTER_HOST='${MYSQL_PORT_3306_TCP_ADDR}',MASTER_USER='${MYSQL_ENV_REPLICATION_USER}',MASTER_PASSWORD='${MYSQL_ENV_REPLICATION_PASS}',MASTER_PORT=${MYSQL_PORT_3306_TCP_PORT}, MASTER_CONNECT_RETRY=30"
mysql -uroot -e "start slave"
echo "=> Done!"
touch /replication_set.2
else
echo "=> MySQL replication slave already configured, skip"
fi
else
echo "=> Cannot configure slave, please link it to another MySQL container with alias as 'mysql'"
exit 1
fi
fi
fg