Why mysql backup is not restored into my docker container ? - mysql

Question

I want to dockerize mysql database. I have .sh script for preparing environment, creating database, user and other things. Mysql dump restore command not working in my .sh script, but working good if i open container shell and exec command in it. I want working command in my .sh script.
Whats wrong in my script ?
Dockerfile:
FROM alpine:latest
WORKDIR /app
COPY startup.sh /startup.sh
COPY backup.sql /app/
RUN apk add --update mysql mysql-client && rm -f /var/cache/apk/*
COPY my.cnf /etc/mysql/my.cnf
EXPOSE 3306
startup.sh :
#!/bin/sh
if [ -d /app/mysql ]; then
echo "[i] MySQL directory already present, skipping creation"
else
echo "[i] MySQL data directory not found, creating initial DBs"
mysql_install_db --user=root > /dev/null
if [ "$MYSQL_ROOT_PASSWORD" = "" ]; then
MYSQL_ROOT_PASSWORD=111111
echo "[i] MySQL root Password: $MYSQL_ROOT_PASSWORD"
fi
MYSQL_DATABASE=myDb
if [ ! -d "/run/mysqld" ]; then
mkdir -p /run/mysqld
fi
tfile=`mktemp`
if [ ! -f "$tfile" ]; then
return 1
fi
cat << EOF > $tfile
EOF
if [ "$MYSQL_DATABASE" != "" ]; then
echo "[i] Creating database: $MYSQL_DATABASE"
echo "FLUSH PRIVILEGES;" >> $tfile
echo "CREATE DATABASE IF NOT EXISTS $MYSQL_DATABASE CHARACTER SET utf8 COLLATE utf8_general_ci;" >> $tfile
echo "CREATE DATABASE IF NOT EXISTS $MYSQL_DATABASE CHARACTER SET utf8 COLLATE utf8_general_ci;"
echo "CREATE USER 'myuser'#'localhost' IDENTIFIED BY '2E7A80BFD6Cwdct5q4i1r9l3';" >> $tfile
echo "CREATE USER 'myuser'#'localhost' IDENTIFIED BY '2E7A80BFD6Cwdct5q4i1r9l3';"
echo "CREATE USER 'myuser'#'%' IDENTIFIED BY '2E7A80BFD6Cwdct5q4i1r9l3';" >> $tfile
echo "CREATE USER 'myuser'#'%' IDENTIFIED BY '2E7A80BFD6Cwdct5q4i1r9l3';"
echo "GRANT ALL PRIVILEGES ON * . * TO 'myuser'#'localhost' WITH GRANT OPTION;" >> $tfile
echo "GRANT ALL PRIVILEGES ON * . * TO 'myuser'#'localhost' WITH GRANT OPTION;"
echo "GRANT ALL PRIVILEGES ON * . * TO 'myuser'#'%' WITH GRANT OPTION;" >> $tfile
echo "GRANT ALL PRIVILEGES ON * . * TO 'myuser'#'%' WITH GRANT OPTION;"
echo "FLUSH PRIVILEGES;" >> $tfile
fi
/usr/bin/mysqld --user=root --bootstrap --verbose=0 < $tfile
rm -f $tfile
fi
exec /usr/bin/mysqld --user=root --console
mysql -u root myDb < backup.sql # THIS LINE NOT WORKING! WHY ?

Answer 1

You're not actually executing your script when the container starts. I'm not certain what you're trying to accomplish with this, and I'm not supposed to ask for clarification, so I'll just answer as best I can and hope this helps.
Try something like:
Dockerfile
FROM alpine:latest
WORKDIR /app
COPY startup.sh /startup.sh
COPY backup.sql /app/
RUN apk add --update mysql mysql-client && rm -f /var/cache/apk/*
COPY my.cnf /etc/mysql/my.cnf
EXPOSE 3306
ENTRYPOINT ["/startup.sh"]
CMD /bin/bash -c "/usr/bin/mysqld --user=root --console && mysql -u root myDb < backup.sql"
Then, you'd modify your startup script like this:
startup.sh
#!/bin/sh
if [ -d /app/mysql ]; then
echo "[i] MySQL directory already present, skipping creation"
else
echo "[i] MySQL data directory not found, creating initial DBs"
mysql_install_db --user=root > /dev/null
if [ "$MYSQL_ROOT_PASSWORD" = "" ]; then
MYSQL_ROOT_PASSWORD=111111
echo "[i] MySQL root Password: $MYSQL_ROOT_PASSWORD"
fi
MYSQL_DATABASE=myDb
if [ ! -d "/run/mysqld" ]; then
mkdir -p /run/mysqld
fi
tfile=`mktemp`
if [ ! -f "$tfile" ]; then
return 1
fi
cat << EOF > $tfile
EOF
if [ "$MYSQL_DATABASE" != "" ]; then
echo "[i] Creating database: $MYSQL_DATABASE"
echo "FLUSH PRIVILEGES;" >> $tfile
echo "CREATE DATABASE IF NOT EXISTS $MYSQL_DATABASE CHARACTER SET utf8 COLLATE utf8_general_ci;" >> $tfile
echo "CREATE DATABASE IF NOT EXISTS $MYSQL_DATABASE CHARACTER SET utf8 COLLATE utf8_general_ci;"
echo "CREATE USER 'myuser'#'localhost' IDENTIFIED BY '2E7A80BFD6Cwdct5q4i1r9l3';" >> $tfile
echo "CREATE USER 'myuser'#'localhost' IDENTIFIED BY '2E7A80BFD6Cwdct5q4i1r9l3';"
echo "CREATE USER 'myuser'#'%' IDENTIFIED BY '2E7A80BFD6Cwdct5q4i1r9l3';" >> $tfile
echo "CREATE USER 'myuser'#'%' IDENTIFIED BY '2E7A80BFD6Cwdct5q4i1r9l3';"
echo "GRANT ALL PRIVILEGES ON * . * TO 'myuser'#'localhost' WITH GRANT OPTION;" >> $tfile
echo "GRANT ALL PRIVILEGES ON * . * TO 'myuser'#'localhost' WITH GRANT OPTION;"
echo "GRANT ALL PRIVILEGES ON * . * TO 'myuser'#'%' WITH GRANT OPTION;" >> $tfile
echo "GRANT ALL PRIVILEGES ON * . * TO 'myuser'#'%' WITH GRANT OPTION;"
echo "FLUSH PRIVILEGES;" >> $tfile
fi
/usr/bin/mysqld --user=root --bootstrap --verbose=0 < $tfile
rm -f $tfile
fi
exec "$#"
Take a look at the way the Dockerfile and docker-entrypoint.sh are set up in the official mysql Docker image repo.

Answer 2

Try the helicopterizer for Backup and Restore for Docker Container.
https://github.com/frekele/helicopterizer
.