3

I'm running a MySQL docker container (latest - 8.0) with the custom configuration file containing:

======================================
[client]

default-character-set=utf8mb4

[mysqld]
collation_server = utf8mb4_unicode_ci
init-connect='SET NAMES utf8mb4'
character_set_server = utf8mb4

[mysql]
default-character-set=utf8mb4
======================================

Executing inside MySQL console:

show variables like "%coll%";

produces this:

+-------------------------------+--------------------+
| Variable_name                 | Value              |
+-------------------------------+--------------------+
| collation_connection          | utf8mb4_0900_ai_ci |
| collation_database            | utf8mb4_unicode_ci |
| collation_server              | utf8mb4_unicode_ci |
| default_collation_for_utf8mb4 | utf8mb4_0900_ai_ci |
+-------------------------------+--------------------+

Executing inside MySQL console:

show variables like "%char%";

produces this:

+--------------------------+--------------------------------+
| Variable_name            | Value                          |
+--------------------------+--------------------------------+
| character_set_client     | utf8mb4                        |
| character_set_connection | utf8mb4                        |
| character_set_database   | utf8mb4                        |
| character_set_filesystem | binary                         |
| character_set_results    | utf8mb4                        |
| character_set_server     | utf8mb4                        |
| character_set_system     | utf8                           |
| character_sets_dir       | /usr/share/mysql-8.0/charsets/ |
+--------------------------+--------------------------------+

BUT when I go the MySQL console with:

docker exec -it mysql1 mysql -uroot -p********* 

I can't use cyrillic (russian) characters. When I switch to Russian locale and try to type anything, the console just ignores keypresses, nothing is displayed on the screen. But when I switch to English locale, everything starts working again.

What can I do to solve this problem?

PS: I AM able to interact with the database via DataGrip and enter Russian characters for table names, fields and records. I'm just completely unable to use Russian characters when I'm inside the MySQL console inside the docker container.

PPS: MySQL is running from an official Docker image on MacOS Mojave and I'm using iTerm 3.2.6. Character encoding in iTerm is set to "Unicode (UTF-8)"

5
  • Windows? *nix? What charset is established for the terminal / cmd program? – Rick James Dec 28 '18 at 20:49
  • @RickJames Just amended the question with more details. – RusI Dec 29 '18 at 5:54
  • init-connect is ignored by root, but that won't explain the problem. Were those SHOWs done via docker's MySQL console? – Rick James Dec 29 '18 at 6:02
  • @RickJames Yes. I first login to docker MySQL container via docker exec -it mysql1 mysql and then execute the show commands. – RusI Dec 29 '18 at 6:45
  • I start to think this is a Docker problem now, I just finished installing MySQL in a RedHat VM and on a physical computer running RedHat and in both instances I did not even have to specify the encoding for MySQL, it just supports Cyrillic characters out of the box without any problems whether I login via SSH from Mac or work directly in RedHat terminal. – RusI Dec 29 '18 at 6:54
4

As it turns out this was indeed a Docker problem rather than MySQL.

Vanilla MySQL image is built on Debian 9 and by default it lacks UTF-8 support. So I had to follow these steps:

  1. Login into Docker container with docker exec -it mysql1 bash and run apt-get update
  2. Then run apt-get install vim apt-get install locales
  3. Run dpkg-reconfigure locales and select 376 for ru_RU.UTF-8
  4. Open ~/.bashrc and add

export LANG=ru_RU.utf8

export LANGUAGE=ru_RU.utf8

export LC_ALL=ru_RU.utf8

  1. Exit the shell and restart the container

Now I can use Russian characters inside the MySQL docker console.

PS: I guess a cleaner and more "Dockeresque" solution would be to run these commands from a Dockerfile. If anybody could provide an answer with a dockerfile example, I'd be happy to accept it.

2
  • 1
    Not sure if this would help, but just FYI, I started the container with docker run -p 3306:3306 -e MYSQL_ROOT_PASSWORD=root -d mysql:5.7 --character-set-server=utf8mb4 --collation-server=utf8mb4_unicode_ci, which did not have the locales package, but still that solved my non-latin character display problem. – wlnirvana Mar 28 '20 at 9:17
  • @wlnirvana I'll give this a try, although you're using 5.7 and I need to use 8.X – RusI Mar 28 '20 at 9:53
0

Run the Docker container with a:

-e LANG=C.UTF-8

Or update your Dockerfile:

ENV LANG C.UTF-8

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