Can't connect mysql container

I followed this instructions

if I enter to the mysql container I can login with root user and the openemr user
but when I try to configure openemr it’s not possible connect with mysql server:

But the credentials are ok. this is my docker-compose:

Use admin/pass as user/password credentials to login to openemr (from OE_USER and OE_PASS below)

MYSQL_HOST and MYSQL_ROOT_PASS are required for openemr

FLEX_REPOSITORY and (FLEX_REPOSITORY_BRANCH or FLEX_REPOSITORY_TAG) are required for flex openemr

EASY_DEV_MODE prevents issues with permissions when mounting volumes

MYSQL_USER, MYSQL_PASS, OE_USER, MYSQL_PASS are optional for openemr and

if not provided, then default to openemr, openemr, admin, and pass respectively.

version: ‘3.1’
services:
mysql:
restart: always
image: mariadb:10.4
command: [‘mysqld’,’–character-set-server=utf8’]
ports:
- 3306:3306
volumes:
- databasevolume:/var/lib/mysql
environment:
MYSQL_ROOT_PASSWORD: rootpwd
openemr:
restart: always
# use an image if you’re not changing the build steps:
image: openemr/openemr:flex
# if editing the Dockerfile, clone the devops repo and point to the path:
# build: …/openemr-devops/docker/openemr/flex-edge/
ports:
- 80:80
- 443:443
- 3000:3000 # browsersync
- 3001:3001 # browsersync-admin
volumes:
- .:/var/www/localhost/htdocs/openemr:rw
- assetsvolume01:/var/www/localhost/htdocs/openemr/public:rw
- configvolume01:/var/www/localhost/htdocs/openemr/sites/default:rw
- configvolume02:/var/www/localhost/htdocs/openemr/interface/modules/zend_modules/config:rw
- logvolume01:/var/log
- nodemodules:/var/www/localhost/htdocs/openemr/node_modules:rw
- vendordir:/var/www/localhost/htdocs/openemr/vendor:rw
- ccdamodule:/var/www/localhost/htdocs/openemr/ccdaservice:rw
environment:
MYSQL_HOST: mysql
MYSQL_ROOT_PASS: rootpwd
MYSQL_USER: openemr
MYSQL_PASS: openemr
OE_USER: admin
OE_PASS: pass
FLEX_REPOSITORY: https://github.com/MYUSER/openemr-dev.git
FLEX_REPOSITORY_BRANCH: master
EASY_DEV_MODE: “yes”
depends_on:
- mysql
phpmyadmin:
restart: always
image: phpmyadmin/phpmyadmin
ports:
- 81:80
environment:
PMA_HOSTS: mysql
volumes:
databasevolume: {}
assetsvolume01: {}
configvolume01: {}
configvolume02: {}
logvolume01: {}
nodemodules: {}
vendordir: {}
ccdamodule: {}

both containers are running and all the credentials are correct
How I can connect to mysql?

hi @PAI ,
what does following command show:

docker ps -a

Now I can connect to my mysql container, the problem was de ip direction, When I was setting openemr I just put “mysql” instead of “localhost”, thank you.