#!/bin/bash
source ${CONTAINER_SCRIPTS_PATH}/helpers.sh
# Data directory where MySQL database files live. The data subdirectory is here
# because .bashrc and my.cnf both live in /var/lib/mysql/ and we don't want a
# volume to override it.
export MYSQL_DATADIR=/var/lib/mysql/data
# Configuration settings.
export MYSQL_DEFAULTS_FILE=${MYSQL_DEFAULTS_FILE:-/etc/my.cnf}
export MYSQL_BINLOG_FORMAT=${MYSQL_BINLOG_FORMAT:-STATEMENT}
export MYSQL_LOWER_CASE_TABLE_NAMES=${MYSQL_LOWER_CASE_TABLE_NAMES:-0}
export MYSQL_MAX_CONNECTIONS=${MYSQL_MAX_CONNECTIONS:-151}
export MYSQL_FT_MIN_WORD_LEN=${MYSQL_FT_MIN_WORD_LEN:-4}
export MYSQL_FT_MAX_WORD_LEN=${MYSQL_FT_MAX_WORD_LEN:-20}
export MYSQL_AIO=${MYSQL_AIO:-1}
export MYSQL_MAX_ALLOWED_PACKET=${MYSQL_MAX_ALLOWED_PACKET:-200M}
export MYSQL_TABLE_OPEN_CACHE=${MYSQL_TABLE_OPEN_CACHE:-400}
export MYSQL_SORT_BUFFER_SIZE=${MYSQL_SORT_BUFFER_SIZE:-256K}
if [ -n "${NO_MEMORY_LIMIT:-}" -o -z "${MEMORY_LIMIT_IN_BYTES:-}" ]; then
key_buffer_size='32M'
read_buffer_size='8M'
innodb_buffer_pool_size='32M'
innodb_log_file_size='8M'
innodb_log_buffer_size='8M'
else
key_buffer_size="$(python -c "print(int((${MEMORY_LIMIT_IN_BYTES}/(1024*1024))*0.1))")M"
read_buffer_size="$(python -c "print(int((${MEMORY_LIMIT_IN_BYTES}/(1024*1024))*0.05))")M"
innodb_buffer_pool_size="$(python -c "print(int((${MEMORY_LIMIT_IN_BYTES}/(1024*1024))*0.5))")M"
innodb_log_file_size="$(python -c "print(int((${MEMORY_LIMIT_IN_BYTES}/(1024*1024))*0.15))")M"
innodb_log_buffer_size="$(python -c "print(int((${MEMORY_LIMIT_IN_BYTES}/(1024*1024))*0.15))")M"
fi
export MYSQL_KEY_BUFFER_SIZE=${MYSQL_KEY_BUFFER_SIZE:-$key_buffer_size}
export MYSQL_READ_BUFFER_SIZE=${MYSQL_READ_BUFFER_SIZE:-$read_buffer_size}
export MYSQL_INNODB_BUFFER_POOL_SIZE=${MYSQL_INNODB_BUFFER_POOL_SIZE:-$innodb_buffer_pool_size}
export MYSQL_INNODB_LOG_FILE_SIZE=${MYSQL_INNODB_LOG_FILE_SIZE:-$innodb_log_file_size}
export MYSQL_INNODB_LOG_BUFFER_SIZE=${MYSQL_INNODB_LOG_BUFFER_SIZE:-$innodb_log_buffer_size}
# Be paranoid and stricter than we should be.
# https://dev.mysql.com/doc/refman/en/identifiers.html
mysql_identifier_regex='^[a-zA-Z0-9_]+$'
mysql_password_regex='^[a-zA-Z0-9_~!@#$%^&*()-=<>,.?;:|]+$'
# Variables that are used to connect to local mysql during initialization
mysql_flags="-u root --socket=/tmp/mysql.sock"
admin_flags="--defaults-file=$MYSQL_DEFAULTS_FILE $mysql_flags"
# Make sure env variables don't propagate to mysqld process.
function unset_env_vars() {
log_info 'Cleaning up environment variables MYSQL_USER, MYSQL_PASSWORD, MYSQL_DATABASE and MYSQL_ROOT_PASSWORD ...'
unset MYSQL_USER MYSQL_PASSWORD MYSQL_DATABASE MYSQL_ROOT_PASSWORD
}
# Poll until MySQL responds to our ping.
function wait_for_mysql() {
pid=$1 ; shift
while [ true ]; do
if [ -d "/proc/$pid" ]; then
mysqladmin --socket=/tmp/mysql.sock ping &>/dev/null && log_info "MySQL started successfully" && return 0
else
return 1
fi
log_info "Waiting for MySQL to start ..."
sleep 1
done
}
# Start local MySQL server with a defaults file
function start_local_mysql() {
log_info 'Starting MySQL server with disabled networking ...'
${MYSQL_PREFIX}/libexec/mysqld \
--defaults-file=$MYSQL_DEFAULTS_FILE \
--skip-networking --socket=/tmp/mysql.sock "$@" &
mysql_pid=$!
wait_for_mysql $mysql_pid
}
# Shutdown mysql flushing privileges
function shutdown_local_mysql() {
log_info 'Shutting down MySQL ...'
mysqladmin $admin_flags flush-privileges shutdown
}
# Initialize the MySQL database (create user accounts and the initial database)
function initialize_database() {
log_info 'Initializing database ...'
log_info 'Running mysql_install_db ...'
# Using --rpm since we need mysql_install_db behaves as in RPM
# Using empty --basedir to work-around https://bugzilla.redhat.com/show_bug.cgi?id=1406391
mysql_install_db --rpm --datadir=$MYSQL_DATADIR --basedir=''
start_local_mysql "$@"
if [ -v MYSQL_RUNNING_AS_SLAVE ]; then
log_info 'Initialization finished'
return 0
fi
if [ -v MYSQL_RUNNING_AS_MASTER ]; then
# Save master status into a separate database.
STATUS_INFO=$(mysql $admin_flags -e 'SHOW MASTER STATUS\G')
BINLOG_POSITION=$(echo "$STATUS_INFO" | grep 'Position:' | head -n 1 | sed -e 's/^\s*Position: //')
BINLOG_FILE=$(echo "$STATUS_INFO" | grep 'File:' | head -n 1 | sed -e 's/^\s*File: //')
GTID_INFO=$(mysql $admin_flags -e "SELECT BINLOG_GTID_POS('$BINLOG_FILE', '$BINLOG_POSITION') AS gtid_value \G")
GTID_VALUE=$(echo "$GTID_INFO" | grep 'gtid_value:' | head -n 1 | sed -e 's/^\s*gtid_value: //')
mysqladmin $admin_flags create replication
mysql $admin_flags <<EOSQL
use replication
CREATE TABLE replication (gtid VARCHAR(256));
INSERT INTO replication (gtid) VALUES ('$GTID_VALUE');
EOSQL
fi
# Do not care what option is compulsory here, just create what is specified
if [ -v MYSQL_USER ]; then
log_info "Creating user specified by MYSQL_USER (${MYSQL_USER}) ..."
mysql $mysql_flags <<EOSQL
CREATE USER '${MYSQL_USER}'@'%' IDENTIFIED BY '${MYSQL_PASSWORD}';
EOSQL
fi
if [ -v MYSQL_DATABASE ]; then
log_info "Creating database ${MYSQL_DATABASE} ..."
mysqladmin $admin_flags create "${MYSQL_DATABASE}"
if [ -v MYSQL_USER ]; then
log_info "Granting privileges to user ${MYSQL_USER} for ${MYSQL_DATABASE} ..."
mysql $mysql_flags <<EOSQL
GRANT ALL ON \`${MYSQL_DATABASE}\`.* TO '${MYSQL_USER}'@'%' ;
FLUSH PRIVILEGES ;
EOSQL
fi
fi
if [ -v MYSQL_ROOT_PASSWORD ]; then
log_info "Setting password for MySQL root user ..."
mysql $mysql_flags <<EOSQL
CREATE USER IF NOT EXISTS 'root'@'%';
GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY '${MYSQL_ROOT_PASSWORD}' WITH GRANT OPTION;
EOSQL
fi
log_info 'Initialization finished'
}
# The 'server_id' number for slave needs to be within 1-4294967295 range.
# This function will take the 'hostname' if the container, hash it and turn it
# into the number.
# See: https://dev.mysql.com/doc/refman/en/replication-options.html#option_mysqld_server-id
function server_id() {
checksum=$(sha256sum <<< $(hostname -i))
checksum=${checksum:0:14}
echo -n $((0x${checksum}%4294967295))
}
function wait_for_mysql_master() {
while true; do
log_info "Waiting for MySQL master (${MYSQL_MASTER_SERVICE_NAME}) to accept connections ..."
mysqladmin --host=${MYSQL_MASTER_SERVICE_NAME} --user="${MYSQL_MASTER_USER}" \
--password="${MYSQL_MASTER_PASSWORD}" ping &>/dev/null && log_info "MySQL master is ready" && return 0
sleep 1
done
}