Hello partners.
I had the need to modify the file /usr/local/bin/docker-entrypoint.sh in order to create several databases when I lifted the container with docker-compose, I hope someone can use it …
And if the administrator thinks it is useful to add it to the file.
Greetings Federico Pereira fpereira@iperfex.com
Example docker-compose.yml for MariaDB
# Use root/example as user/password credentials
version: '3.6'
services:
db:
image: mariadb:latest
restart: always
environment:
MYSQL_ROOT_PASSWORD: example
MYSQL_DATABASES: "one two three"
MYSQL_USER: user1
MYSQL_PASSWORD: password
adminer:
image: adminer
restart: always
ports:
- 8080:8080
volumes:
- /xxx/docker-entrypoint.sh:/usr/local/bin/docker-entrypoint.sh
Important note: if you use this method and you want to use docker-entrypoint-initdb.d to import your tables it is advisable to use USE my_databases; each sql file.
Example: docker-entrypoint-initdb.d
# Use root/example as user/password credentials
version: '3.6'
services:
db:
image: mariadb:latest
restart: always
environment:
MYSQL_ROOT_PASSWORD: example
MYSQL_DATABASES: "one two three"
MYSQL_USER: user1
MYSQL_PASSWORD: password
adminer:
image: adminer
restart: always
ports:
- 8080:8080
volumes:
- /xxx/example1.sql:/docker-entrypoint-initdb.d/1-init.sql
- /xxx/example2.sql:/docker-entrypoint-initdb.d/2-init.sql
- /xxx/docker-entrypoint.sh:/usr/local/bin/docker-entrypoint.sh
cat /xxx/example1.sql
USE one;
...
...
...
cat /xxx/example2.sql
USE two;
...
...
...
Code
Add after file_env ‘MYSQL_DATABASE’ line: 157
# create several databases using the MYSQL DATABASES env
#example: export MYSQL_DATABASES = "one two three"
file_env 'MYSQL_DATABASES'
if [ "$MYSQL_DATABASES" ]; then
for databaseName in $MYSQL_DATABASES; do
echo "CREATE DATABASE IF NOT EXISTS \`$databaseName\` ;" | "${mysql[@]}"
done
fi
Modify if ["$ MYSQL_USER" -a “$ MYSQL_PASSWORD”] … line: 167 approximate
file_env 'MYSQL_USER'
file_env 'MYSQL_PASSWORD'
if [ "$MYSQL_USER" -a "$MYSQL_PASSWORD" ]; then
echo "CREATE USER '$MYSQL_USER'@'%' IDENTIFIED BY '$MYSQL_PASSWORD' ;" | "${mysql[@]}"
if [ "$MYSQL_DATABASE" ]; then
echo "GRANT ALL ON \`$MYSQL_DATABASE\`.* TO '$MYSQL_USER'@'%' ;" | "${mysql[@]}"
fi
#create the permissions for the different databases created with the db user
if [ "$MYSQL_DATABASES" ]; then
for databaseName in $MYSQL_DATABASES; do
echo "GRANT ALL ON \`$databaseName\`.* TO '$MYSQL_USER'@'%' ;" | "${mysql[@]}"
done
fi
echo 'FLUSH PRIVILEGES ;' | "${mysql[@]}"
fi
Complete code file /usr/local/bin/docker-entrypoint.sh
#!/bin/bash
set -eo pipefail
shopt -s nullglob
# if command starts with an option, prepend mysqld
if [ "${1:0:1}" = '-' ]; then
set -- mysqld "$@"
fi
# skip setup if they want an option that stops mysqld
wantHelp=
for arg; do
case "$arg" in
-'?'|--help|--print-defaults|-V|--version)
wantHelp=1
break
;;
esac
done
# usage: file_env VAR [DEFAULT]
# ie: file_env 'XYZ_DB_PASSWORD' 'example'
# (will allow for "$XYZ_DB_PASSWORD_FILE" to fill in the value of
# "$XYZ_DB_PASSWORD" from a file, especially for Docker's secrets feature)
file_env() {
local var="$1"
local fileVar="${var}_FILE"
local def="${2:-}"
if [ "${!var:-}" ] && [ "${!fileVar:-}" ]; then
echo >&2 "error: both $var and $fileVar are set (but are exclusive)"
exit 1
fi
local val="$def"
if [ "${!var:-}" ]; then
val="${!var}"
elif [ "${!fileVar:-}" ]; then
val="$(< "${!fileVar}")"
fi
export "$var"="$val"
unset "$fileVar"
}
_check_config() {
toRun=( "$@" --verbose --help --log-bin-index="$(mktemp -u)" )
if ! errors="$("${toRun[@]}" 2>&1 >/dev/null)"; then
cat >&2 <<-EOM
ERROR: mysqld failed while attempting to check config
command was: "${toRun[*]}"
$errors
EOM
exit 1
fi
}
# Fetch value from server config
# We use mysqld --verbose --help instead of my_print_defaults because the
# latter only show values present in config files, and not server defaults
_get_config() {
local conf="$1"; shift
"$@" --verbose --help --log-bin-index="$(mktemp -u)" 2>/dev/null | awk '$1 == "'"$conf"'" { print $2; exit }'
}
# allow the container to be started with `--user`
if [ "$1" = 'mysqld' -a -z "$wantHelp" -a "$(id -u)" = '0' ]; then
_check_config "$@"
DATADIR="$(_get_config 'datadir' "$@")"
mkdir -p "$DATADIR"
chown -R mysql:mysql "$DATADIR"
exec gosu mysql "$BASH_SOURCE" "$@"
fi
if [ "$1" = 'mysqld' -a -z "$wantHelp" ]; then
# still need to check config, container may have started with --user
_check_config "$@"
# Get config
DATADIR="$(_get_config 'datadir' "$@")"
if [ ! -d "$DATADIR/mysql" ]; then
file_env 'MYSQL_ROOT_PASSWORD'
if [ -z "$MYSQL_ROOT_PASSWORD" -a -z "$MYSQL_ALLOW_EMPTY_PASSWORD" -a -z "$MYSQL_RANDOM_ROOT_PASSWORD" ]; then
echo >&2 'error: database is uninitialized and password option is not specified '
echo >&2 ' You need to specify one of MYSQL_ROOT_PASSWORD, MYSQL_ALLOW_EMPTY_PASSWORD and MYSQL_RANDOM_ROOT_PASSWORD'
exit 1
fi
mkdir -p "$DATADIR"
echo 'Initializing database'
mysql_install_db --datadir="$DATADIR" --rpm
echo 'Database initialized'
SOCKET="$(_get_config 'socket' "$@")"
"$@" --skip-networking --socket="${SOCKET}" &
pid="$!"
mysql=( mysql --protocol=socket -uroot -hlocalhost --socket="${SOCKET}" )
for i in {30..0}; do
if echo 'SELECT 1' | "${mysql[@]}" &> /dev/null; then
break
fi
echo 'MySQL init process in progress...'
sleep 1
done
if [ "$i" = 0 ]; then
echo >&2 'MySQL init process failed.'
exit 1
fi
if [ -z "$MYSQL_INITDB_SKIP_TZINFO" ]; then
# sed is for https://bugs.mysql.com/bug.php?id=20545
mysql_tzinfo_to_sql /usr/share/zoneinfo | sed 's/Local time zone must be set--see zic manual page/FCTY/' | "${mysql[@]}" mysql
fi
if [ ! -z "$MYSQL_RANDOM_ROOT_PASSWORD" ]; then
export MYSQL_ROOT_PASSWORD="$(pwgen -1 32)"
echo "GENERATED ROOT PASSWORD: $MYSQL_ROOT_PASSWORD"
fi
rootCreate=
# default root to listen for connections from anywhere
file_env 'MYSQL_ROOT_HOST' '%'
if [ ! -z "$MYSQL_ROOT_HOST" -a "$MYSQL_ROOT_HOST" != 'localhost' ]; then
# no, we don't care if read finds a terminating character in this heredoc
# https://unix.stackexchange.com/questions/265149/why-is-set-o-errexit-breaking-this-read-heredoc-expression/265151#265151
read -r -d '' rootCreate <<-EOSQL || true
CREATE USER 'root'@'${MYSQL_ROOT_HOST}' IDENTIFIED BY '${MYSQL_ROOT_PASSWORD}' ;
GRANT ALL ON *.* TO 'root'@'${MYSQL_ROOT_HOST}' WITH GRANT OPTION ;
EOSQL
fi
"${mysql[@]}" <<-EOSQL
-- What's done in this file shouldn't be replicated
-- or products like mysql-fabric won't work
SET @@SESSION.SQL_LOG_BIN=0;
DELETE FROM mysql.user WHERE user NOT IN ('mysql.sys', 'mysqlxsys', 'root') OR host NOT IN ('localhost') ;
SET PASSWORD FOR 'root'@'localhost'=PASSWORD('${MYSQL_ROOT_PASSWORD}') ;
GRANT ALL ON *.* TO 'root'@'localhost' WITH GRANT OPTION ;
${rootCreate}
DROP DATABASE IF EXISTS test ;
FLUSH PRIVILEGES ;
EOSQL
if [ ! -z "$MYSQL_ROOT_PASSWORD" ]; then
mysql+=( -p"${MYSQL_ROOT_PASSWORD}" )
fi
file_env 'MYSQL_DATABASE'
if [ "$MYSQL_DATABASE" ]; then
echo "CREATE DATABASE IF NOT EXISTS \`$MYSQL_DATABASE\` ;" | "${mysql[@]}"
mysql+=( "$MYSQL_DATABASE" )
fi
# create several databases using the MYSQL DATABASES env
#example: export MYSQL_DATABASES = "one two three"
file_env 'MYSQL_DATABASES'
if [ "$MYSQL_DATABASES" ]; then
for databaseName in $MYSQL_DATABASES; do
echo "CREATE DATABASE IF NOT EXISTS \`$databaseName\` ;" | "${mysql[@]}"
done
fi
file_env 'MYSQL_USER'
file_env 'MYSQL_PASSWORD'
if [ "$MYSQL_USER" -a "$MYSQL_PASSWORD" ]; then
echo "CREATE USER '$MYSQL_USER'@'%' IDENTIFIED BY '$MYSQL_PASSWORD' ;" | "${mysql[@]}"
if [ "$MYSQL_DATABASE" ]; then
echo "GRANT ALL ON \`$MYSQL_DATABASE\`.* TO '$MYSQL_USER'@'%' ;" | "${mysql[@]}"
fi
#create the permissions for the different databases created with the db user
if [ "$MYSQL_DATABASES" ]; then
for databaseName in $MYSQL_DATABASES; do
echo "GRANT ALL ON \`$databaseName\`.* TO '$MYSQL_USER'@'%' ;" | "${mysql[@]}"
done
fi
echo 'FLUSH PRIVILEGES ;' | "${mysql[@]}"
fi
echo
for f in /docker-entrypoint-initdb.d/*; do
case "$f" in
*.sh) echo "$0: running $f"; . "$f" ;;
*.sql) echo "$0: running $f"; "${mysql[@]}" < "$f"; echo ;;
*.sql.gz) echo "$0: running $f"; gunzip -c "$f" | "${mysql[@]}"; echo ;;
*) echo "$0: ignoring $f" ;;
esac
echo
done
if ! kill -s TERM "$pid" || ! wait "$pid"; then
echo >&2 'MySQL init process failed.'
exit 1
fi
echo
echo 'MySQL init process done. Ready for start up.'
echo
fi
fi
exec "$@"
#check
MariaDB [one]> select host, user, password from mysql.user;
+-----------+--------------+-------------------------------------------+
| host | user | password |
+-----------+--------------+-------------------------------------------+
| localhost | root | *877C76D244B4A8FCCC96EA5312273D31F6731354 |
| % | user1 | *76855C0C4687945F39741CD2257F826AD6057501 |
| % | root | *877C76D244B4A8FCCC96EA5312273D31F6731354 |
+-----------+--------------+-------------------------------------------+
3 rows in set (0.00 sec)
MariaDB [one]> SHOW GRANTS FOR 'user1'@'%';
+-------------------------------------------------------------------------------------------------------------+
| Grants for user1@% |
+-------------------------------------------------------------------------------------------------------------+
| GRANT USAGE ON *.* TO 'user1'@'%' IDENTIFIED BY PASSWORD '*76855C0C4687945F39741CD2257F826AD6057501' |
| GRANT ALL PRIVILEGES ON `one`.* TO 'user1'@'%' |
| GRANT ALL PRIVILEGES ON `two`.* TO 'user1'@'%' |
| GRANT ALL PRIVILEGES ON `three`.* TO 'user1'@'%' |
+-------------------------------------------------------------------------------------------------------------+
3 rows in set (0.00 sec)