Can't connect to my prestashop database using docker - docker

Question

Here is the command I used to create containers :
docker network create prestashop
docker run -ti --name db --network prestashop -e MYSQL_ROOT_PASSWORD=1234 -p 3307:3306 -d mysql:latest
docker run -ti --name prestashop --network prestashop -e DB_SERVER=db -p 8080:80 -d prestashop/prestashop
With that I can access to the Prestashop installation however when I need to configure the database I get this error :
Database Server is not found. Please verify the login, password and server fields (DbPDO)
I'm using thoses fields :
Database server address : (for this one I tried :) db | 127.0.0.1:3037 | 127.0.0.1
Database name : prestashop
Database login : root
Database password : 1234
And I'm stuck to this step
EDIT :
Tried :
Insert another computer the same commands, everything works until I try to connect from the prestashop database configuration.
Removing the -ti options from the command line like #balexandre said.
Update
The issue come from the MySQL Version 8. I changed the mysql:latest to mysql:5.7 and everything is working but this is not the version I'm looking for.
I still have no clue why MySQL 8 doesn't work

Answer 1

If you follow the documentation in Docker Hub, it says:
The MySQL server can be reached:
from the host using port 3307 (example: $ mysql -uroot -padmin -h localhost --port 3307)
from a container in the network using the URL some-mysql.
the interesting part should be the
from a container in the network using the URL some-mysql.
that means, as you have changed the name of your MySQL image to db that you should use dband not 127.0.0.1 because you told Docker that those 2 containers can only communicate through the prestashop network with --network prestashop
in other words, all will be fine if you simply replace the "Database server address" value with db
like:

Answer 2

Thanks to #balexandre for the help.
First setup the network and his two containers with the following command :
docker network create prestashop
docker run --name db --network prestashop -e MYSQL_ROOT_PASSWORD=1234 -p 3307:3306 -d mysql:latest
docker run --name prestashop --network prestashop -e DB_SERVER=db -p 8080:80 -d prestashop/prestashop
Then if you're using a recent version of prestashop 1.7.* and a MySQL Version 8.*
You might need to change the plugin used for the connection.
Connect to your mysql container bash :
docker exec -it db mysql -uroot -p
When you're on the MySQL command line check your users :
SELECT user,plugin,host FROM mysql.user;
Output :
+------------------+-----------------------+-----------+
| user | plugin | host |
+------------------+-----------------------+-----------+
| root | caching_sha2_password | |
| mysql.infoschema | caching_sha2_password | localhost |
| mysql.session | caching_sha2_password | localhost |
| mysql.sys | caching_sha2_password | localhost |
| root | caching_sha2_password | localhost |
+------------------+-----------------------+-----------+
To be able to configure your database on your prestashop you need to change the plugin for your root user with empty host
ALTER user 'root'#'%' IDENTIFIED WITH mysql_native_password BY 'ENTER YOUR PASSWORD';
FLUSH PRIVILEGES;
Everything must work now.
Check #balexandre answer to know what to do on the prestashop setup.

Answer 3

In addition to #balexandre's answer, you also want to check remote access rights to the mysql server.
To do so, open the container from which you want to access the mysql container in cli mode then try to connect to mysql using 'mysql -u root -p' command. Chances are you will get an error 1130 which means that the mysql server doesn't allow a remote connection.
This is how to fix it : https://stackoverflow.com/a/19101356
After flushing privileges, the connection goes through.