Access denied for user 'root'#'localhost' in the mysql docker - mysql

Question

Running a docker mysql container in the following command
docker run -it --name mysql -e MYSQL_ROOT_PASSWORD=123456 mysql
then docker creates a running mysql container with logs as
2020-07-23 09:39:19+00:00 [Note] [Entrypoint]: Entrypoint script for MySQL Server 8.0.21-1debian10 started.
2020-07-23 09:39:20+00:00 [Note] [Entrypoint]: Switching to dedicated user 'mysql'
2020-07-23 09:39:20+00:00 [Note] [Entrypoint]: Entrypoint script for MySQL Server 8.0.21-1debian10 started.
2020-07-23 09:39:20+00:00 [Note] [Entrypoint]: Initializing database files
2020-07-23T09:39:20.408751Z 0 [Warning] [MY-011070] [Server] 'Disabling symbolic links using --skip-symbolic-links (or equivalent) is the default. Consider not using this option as it' is deprecated and will be removed in a future release.
2020-07-23T09:39:20.408909Z 0 [System] [MY-013169] [Server] /usr/sbin/mysqld (mysqld 8.0.21) initializing of server in progress as process 42
2020-07-23T09:39:20.424771Z 1 [System] [MY-013576] [InnoDB] InnoDB initialization has started.
2020-07-23T09:39:22.342488Z 1 [System] [MY-013577] [InnoDB] InnoDB initialization has ended.
2020-07-23T09:39:26.473394Z 6 [Warning] [MY-010453] [Server] root#localhost is created with an empty password ! Please consider switching off the --initialize-insecure option.
2020-07-23 09:39:35+00:00 [Note] [Entrypoint]: Database files initialized
2020-07-23 09:39:35+00:00 [Note] [Entrypoint]: Starting temporary server
mysqld will log errors to /var/lib/mysql/da5f3f1ae045.err
mysqld is running as pid 91
2020-07-23 09:39:37+00:00 [Note] [Entrypoint]: Temporary server started.
Warning: Unable to load '/usr/share/zoneinfo/iso3166.tab' as time zone. Skipping it.
Warning: Unable to load '/usr/share/zoneinfo/leap-seconds.list' as time zone. Skipping it.
Warning: Unable to load '/usr/share/zoneinfo/zone.tab' as time zone. Skipping it.
Warning: Unable to load '/usr/share/zoneinfo/zone1970.tab' as time zone. Skipping it.
2020-07-23 09:39:56+00:00 [Note] [Entrypoint]: Stopping temporary server
2020-07-23 09:39:59+00:00 [Note] [Entrypoint]: Temporary server stopped
2020-07-23 09:39:59+00:00 [Note] [Entrypoint]: MySQL init process done. Ready for start up.
2020-07-23T09:39:59.908211Z 0 [Warning] [MY-011070] [Server] 'Disabling symbolic links using --skip-symbolic-links (or equivalent) is the default. Consider not using this option as it' is deprecated and will be removed in a future release.
2020-07-23T09:39:59.910343Z 0 [System] [MY-010116] [Server] /usr/sbin/mysqld (mysqld 8.0.21) starting as process 1
2020-07-23T09:39:59.945124Z 1 [System] [MY-013576] [InnoDB] InnoDB initialization has started.
2020-07-23T09:40:00.579927Z 1 [System] [MY-013577] [InnoDB] InnoDB initialization has ended.
2020-07-23T09:40:00.969050Z 0 [System] [MY-011323] [Server] X Plugin ready for connections. Bind-address: '::' port: 33060, socket: /var/run/mysqld/mysqlx.sock
2020-07-23T09:40:01.137873Z 0 [Warning] [MY-010068] [Server] CA certificate ca.pem is self signed.
2020-07-23T09:40:01.138424Z 0 [System] [MY-013602] [Server] Channel mysql_main configured to support TLS. Encrypted connections are now supported for this channel.
2020-07-23T09:40:01.145079Z 0 [Warning] [MY-011810] [Server] Insecure configuration for --pid-file: Location '/var/run/mysqld' in the path is accessible to all OS users. Consider choosing a different directory.
2020-07-23T09:40:01.233430Z 0 [System] [MY-010931] [Server] /usr/sbin/mysqld: ready for connections. Version: '8.0.21' socket: '/var/run/mysqld/mysqld.sock' port: 3306 MySQL Community Server - GPL.
Trying to access the container with
mysql -h localhost -u root -p
it asks for the password, using 123456 as the password fails; using empty password also fails.
ERROR 1045 (28000): Access denied for user 'root'#'localhost' (using password: YES)

Answer 1

docker exec -it mysql mysql -uroot -p, then a prompt is out to input the password with 123456, then It can successfully get access to the mysql command line. however why I can't use tableplus
From the comment above it's verified that you are able to access the mysql server inside the container, so the issue with tableplus not the container root password.
Just publish the port and it should work,
docker run -it -p 3306:3306 --name mysql -e MYSQL_ROOT_PASSWORD=123456 mysql
Also, it seems like tableplus connecting with host MySQL instead of container one as container did not publish the port in your case so it trying to connect somewhere else.

Answer 2

It might be that this MySQL installation uses authentication mechanisms of the operating system. Instead of the root passowrd.
To test if that's the case, execute the following command:
sudo mysql -u root
It will ask you for your operating system privileged password, not the MySQL root password (which might be unset).
After you get in, you can add new users, as usual and as described in MySQL manual and tutorials.
Also, you might want try the instructions mentioned here:
https://dev.mysql.com/doc/refman/8.0/en/resetting-permissions.html
See section "B.4.3.2.3 Resetting the Root Password: Generic Instructions".
Quoting it below (and cleaned up a bit), in case if the website is not reachable:
Stop the MySQL server if necessary, then restart it with the
--skip-grant-tables option (see How to start MySQL with --skip-grant-tables? for some ways how to do it)
Connect to the MySQL server using the mysql client; no password is
necessary because the server was started with --skip-grant-tables:
shell> mysql
In the mysql client, tell the server to reload the grant
tables so that account-management statements work:
mysql> FLUSH PRIVILEGES;
Then change the 'root'#'localhost' account
password. Replace the password with the password that you want to use.
To change the password for a root account with a different host name
part, modify the instructions to use that host name.
mysql> ALTER USER 'root'#'localhost' IDENTIFIED BY 'MyNewPass';
You
should now be able to connect to the MySQL server as root using the
new password. Stop the server and restart it normally (without the
--skip-grant-tables option).

Answer 3

I had the same issue and i fixed it replacing localhost with the private ip:
mysql -u root -p -h 192.168.10.4