Can't connect to local MySQL server using Docker - mysql

Question

Please help me to solve this problem:
I am using docker to create a mysql container and initialize a database in it automatically based on mysql:8.0.19. But when I get into the container and enter the pass word after 'mysql -u root -p', it is said that:
ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock'
There are four files: Dockerfile, schema.sql, privileges.sql, setup.sh
Dockerfile:
FROM mysql:8.0.19
# allow no password
ENV MYSQL_ALLOW_EMPTY_PASSWORD yes
# copy file into container
COPY setup.sh /mysql/setup.sh
COPY schema.sql /mysql/schema.sql
COPY privileges.sql /mysql/privileges.sql
# exec these command when container start up
CMD ["sh", "/mysql/setup.sh"]
setup.sh:
#!/bin/bash
echo 'checking mysql status.'
service mysql status
echo '1.start mysql....'
service mysql start
sleep 3
service mysql status
echo '2.start importing data....'
mysql < /mysql/schema.sql
echo '3.end importing data....'
sleep 3
service mysql status
echo '4.start changing password....'
mysql < /mysql/privileges.sql
echo '5.end changing password....'
sleep 3
service mysql status
echo 'mysql is ready'
tail -f /dev/null
privileges.sql:
use mysql;
select host, user, plugin from user;
ALTER USER 'root'#'localhost' IDENTIFIED BY '123456';
FLUSH PRIVILEGES;
schema.sql:
create database `collector`;
use collector;
DROP TABLE IF EXISTS `EVENT`;
CREATE TABLE `EVENT` (
`ID` VARCHAR(50) NOT NULL,
`EventType`VARCHAR(50) DEFAULT NULL,
`EventID` VARCHAR(50) DEFAULT NULL,
`EpcID` VARCHAR(50) DEFAULT NULL,
`TimeStamp` FLOAT DEFAULT NULL,
PRIMARY KEY (`ID`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1;
INSERT INTO `EVENT` (`ID`, `EventType`, `EventID`, `EpcID`, `TimeStamp`)
VALUES('0','0','0','0',0.0);
I think privileges.sql might be the one that causing the problem, but i have no idea how to solve it.
By the way I use:
docker build . -t mysql_service:1.0
docker run -p 3306:3306 --name mysql_service -e MYSQL_ROOT_PASSWORD=123456 -d mysql_service:1.0
to build and run.

Answer 1

To set a root password use MYSQL_ROOT_PASSWORD=123456.
MYSQL_DATABASE=collector is also available to create the database and use it as the default.
FLUSH PRIVILEGES aren't needed for ALTER USER.
The docker container doesn't have a init so service ... commands won't work. Also the mysqld isn't running in the build stage.
https://hub.docker.com/_/mysql/ under Initializing a fresh instance you can put SQL files in /docker-entrypoint-initdb.d to initialize the database.