So, I've got a MySQL docker container on which I run a script to write into the database, but when I execute the script, my script throws
mysql.connector.errors.DatabaseError: 2003 (HY000): Can't connect to MySQL server on '127.0.0.1' (111)
Do I have to start the MySQL service in the Dockerfile?
docker-compose.yml:
version: '3.3'
services:
db:
build: .
restart: always
environment:
MYSQL_ROOT_PASSWORD: test
MYSQL_DATABASE: test
MYSQL_USER: test
MYSQL_PASSWORD: test
volumes:
- ./db_data:/docker-entrypoint-initdb.d
First you need to expose the MySQL port 3306 or any other port you set for the MySQL
and then you can get help from commmand parameter.
A working sample would be like this:
version: '3.1'
services:
db:
image: mysql
container_name: mysql_test
command: --default-authentication-plugin=mysql_native_password
restart: always
environment:
MYSQL_ROOT_PASSWORD: root_password
MYSQL_DATABASE: test
MYSQL_USER: test_user
MYSQL_PASSWORD: test_password
ports:
- 30001:3306
expose:
- 30001
volumes:
- my-db:/var/lib/mysql
networks:
- test
networks:
test:
volumes:
my-db:
driver: local
With this sample code you will be able to connect with localhost:30001 to your database from host machine and mysql_test:3306 from other containers within the same network.
If you're trying to execute script in your host, you need to export port 3306
version: '3.3'
services:
db:
build: .
restart: always
environment:
MYSQL_ROOT_PASSWORD: test
MYSQL_DATABASE: test
MYSQL_USER: test
MYSQL_PASSWORD: test
ports:
- 3306:3306
volumes:
- ./db_data:/docker-entrypoint-initdb.d
If you're trying to execute inside docker (with a docker exec for example), check if container is up with docker ps
Related
Good morning,
I have 2 docker container configured, with the same Dockerfile, but different ports, see configuration
mariadb:
container_name: mariadb
image: project/mariadb
build:
context: .
dockerfile: ./docker/mariadb/Dockerfile
environment:
MYSQL_ROOT_PASSWORD: "$MYSQL_ROOT_PASSWORD"
MYSQL_DATABASE: "$MYSQL_DATABASE"
MYSQL_USER: "$MYSQL_USER"
MYSQL_PASSWORD: "$MYSQL_PASSWORD"
command: ['mysqld', '--character-set-server=utf8mb4', '--collation-server=utf8mb4_unicode_ci']
ports:
- "3306:3306"
volumes:
- mysql_data:/var/lib/mysql
- ./services/mysql/utf8mb4.cnf:/etc/mysql/conf.d/utf8mb4.cnf:ro
mariadb_test:
container_name: mariadb_test
image: project/mariadb
build:
context: .
dockerfile: ./docker/mariadb/Dockerfile
environment:
MYSQL_ROOT_PASSWORD: "admin"
MYSQL_DATABASE: project_test
MYSQL_USER: foo
MYSQL_PASSWORD: bar
command: ['mysqld', '--character-set-server=utf8mb4', '--collation-server=utf8mb4_unicode_ci']
ports:
- "3317:3306"
volumes:
- ./services/mysql/utf8mb4.cnf:/etc/mysql/conf.d/utf8mb4.cnf:ro
I can connect to mariadb (Port:3306) Container without any problems, Parameters are saved in .env:
mysql://$MYSQL_USER:$MYSQL_PASSWORD#$MYSQL_HOST:$MYSQL_PORT/$MYSQL_DATABASE
But if I try to connect to mariadb_test I get a
SQLSTATE[HY000] [2002] Connection refused
even if I hardcode the connection params to:
mysql://foo:bar#mariadb_test:3317/project_test
I'm very frustrated...What am I doing wrong?
Thanks to #David Maze who answered my question in a comment:
Connections between containers always use the "normal" ports; they ignore ports: remappings. Use the standard MySQL port 3306 in the database connection string.
I am new to docker and i have this docker .yml file (below) and i have a local set up of my WordPress site, i have imported a sql dump into a database in the 'container_web'. The problem i am having is that when i try to connect WordPress to the database inside the container i get this error "Error establishing a database connection." For the host i've used localhost, 127.0.0.1, mysql and none of them seems to work.
Do you know or could direct me in the right direction on what i should be checking in order to connect my WordPress install to the database?
services:
web:
build: .
container_name: 'container_web'
dns: '8.8.8.8'
volumes:
- ./:/var/www/html
- ./uploads.ini:/usr/local/etc/php/conf.d/uploads.ini
depends_on:
- db
ports:
- 80:80
restart: always
environment:
WORDPRESS_ENV: 'development'
db:
container_name: 'container_db'
image: mysql:5.7
ports:
- 3306:3306
volumes:
- ./:/var/lib/mysql
restart: always
environment:
MYSQL_ROOT_PASSWORD: root
MYSQL_DATABASE: mydatabase
MYSQL_USER: user
MYSQL_PASSWORD: password
volumes:
mysql-data: {}
I created a MySQL container but can only connect to the database from the host.
I start the MySQL container in this file:
docker-composer.yml:
version: '3.3'
services:
db:
image: mysql:5.7
ports:
- "3307:3306"
volumes:
- db_data:/var/lib/mysql
restart: always
environment:
MYSQL_ROOT_PASSWORD: somewordpress
MYSQL_DATABASE: wordpress
MYSQL_USER: wordpress
MYSQL_PASSWORD: wordpress
wordpress:
depends_on:
- db
image: wordpress:latest
ports:
- "8000:80"
restart: always
environment:
WORDPRESS_DB_HOST: db:3306
WORDPRESS_DB_USER: wordpress
WORDPRESS_DB_PASSWORD: wordpress
WORDPRESS_DB_NAME: wordpress
volumes:
db_data: {}
when run docker-compser up , I got this error:
MySQL Connection Error: (2002) No route to host
But I can succeed to connect to the container from the host, like this:
mysql -u root -p -h 127.0.0.1 -P 3307
You can try to connect without a port specifying:
WORDPRESS_DB_HOST: db
It turns out to be a firewall problem. I am using fedora 32 system. And the docker interface using the default zone which will block 80 port and 3306 port.
So, after I bind my docker interface to trusted zone and added some port everything worked.
I'm trying to user docker-compose for mysql and phpmyadmin, but I'm getting an authentication error when trying to log in to phpmyadmin.
I've tried several configurations on the yaml file, but without any success.
version: '3'
services:
db:
image: mysql
command: --default-authentication-plugin=mysql_native_password
restart: always
environment:
MYSQL_DATABASE: mydb
MYSQL_USER: root
MYSQL_PASSWORD: admin
MYSQL_ROOT_PASSWORD: admin
volumes:
- my-db:/var/lib/mysql
phpmyadmin:
image: phpmyadmin/phpmyadmin:latest
links:
- db
ports:
- 8080:80
restart: always
environment:
PMA_USER: root
PMA_PASSWORD: admin
volumes:
my-db: {}
When I try logging in to phpmyadmin i get the following errors:
mysqli_real_connect(): The server requested authentication method unknown to the client [caching_sha2_password]
mysqli_real_connect(): (HY000/2054): The server requested authentication method unknown to the client
I tried to change the yml to:
version: '3'
services:
db:
image: mysql:57
restart: always
environment:
After this, the container no longer starts, and it gives the following message:
docker_db_1 exited with code 1
This works fine:
version: '3'
services:
db:
image: mysql:5.7
command: --default-authentication-plugin=mysql_native_password
restart: always
environment:
MYSQL_DATABASE: mydb
MYSQL_USER: root
MYSQL_PASSWORD: admin
MYSQL_ROOT_PASSWORD: admin
volumes:
- my-db:/var/lib/mysql
phpmyadmin:
image: phpmyadmin/phpmyadmin:latest
links:
- db
ports:
- 8080:80
restart: always
environment:
PMA_USER: root
PMA_PASSWORD: admin
volumes:
my-db: {}
Remember to delete the volume before running (in case you run into issues).
I just copied this code in docker-compose.yml
version: '3'
services:
db:
image: mysql
command: --default-authentication-plugin=mysql_native_password
restart: always
environment:
MYSQL_DATABASE: mydb
MYSQL_USER: root
MYSQL_PASSWORD: admin
MYSQL_ROOT_PASSWORD: admin
volumes:
- my-db:/var/lib/mysql
phpmyadmin:
image: phpmyadmin/phpmyadmin:latest
links:
- db
ports:
- 8080:80
restart: always
environment:
PMA_USER: root
PMA_PASSWORD: admin
volumes:
my-db: {}
and ran the command docker stack deploy -c docker-compose.yml mysqllab
This is the result
enter image description here
I am using this Docker config: https://github.com/romaricp/kit-starter-symfony-4-docker
I start the environment by using:
docker-compose build
followed by:
docker-compose up -d
Everything is running fine but there is a problem with MySQL service. I get an Symfony error:
"An exception occurred in driver: could not find driver"
as well as PMA error when I try to login to DB:
mysqli_real_connect(): php_network_getaddresses: getaddrinfo failed:
Name does not resolve
Any idea how could I make it work?
docker-compose.yml:
version: '3'
services:
apache:
build: .docker/apache
container_name: sf4_apache
ports:
- 80:80
volumes:
- .docker/config/vhosts:/etc/apache2/sites-enabled
- .:/home/wwwroot/sf4
depends_on:
- php
mysql:
image: mysql
container_name: sf4_mysql
volumes:
- .docker/data/db:/var/lib/mysql
environment:
MYSQL_ROOT_PASSWORD: root
MYSQL_DATABASE: sf4
MYSQL_USER: sf4
MYSQL_PASSWORD: sf4
php:
build: .docker/php
container_name: sf4_php
volumes:
- .:/home/wwwroot/sf4
environment:
- maildev_host=sf4_maildev
depends_on:
- maildev
- mysql
phpmyadmin:
image: phpmyadmin/phpmyadmin
container_name: sf4_phpmyadmin
ports:
- 8080:80
links:
- mysql
maildev:
image: djfarrelly/maildev
container_name: sf4_maildev
ports:
- 8001:80
Also I opened the mysql logs and I see this:
2019-04-07T12:00:30.943414Z 0 [System] [MY-010931] [Server] /usr/sbin/mysqld: ready for connections. Version: '8.0.15' socket: '/var/run/mysqld/mysqld.sock' port: 3306 MySQL Community Server - GPL.
Maybe the port is wrong and that's why I can't connect?
For phpmyadmin service, i think you should set the PMA_HOST and PMA_PORT environment variables like this:
phpmyadmin:
image: phpmyadmin/phpmyadmin
container_name: sf4_phpmyadmin
environment:
PMA_HOST: mysql
PMA_PORT: 3306
ports:
- 8080:80
links:
- mysql
Your mysql container should have the command instruction at the start to set the authentication plugin (there is an issue with the connectors with mysql 8), more details here
mysql:
image: mysql
container_name: sf4_mysql
command: "--default-authentication-plugin=mysql_native_password"
volumes:
- .docker/data/db:/var/lib/mysql
environment:
MYSQL_ROOT_PASSWORD: root
MYSQL_DATABASE: sf4
MYSQL_USER: sf4
MYSQL_PASSWORD: sf4
in your Symfony app, the connection string is located in .env file, and it should have the following format :
DATABASE_URL=mysql://mysql_user:mysql_user_password#mysql_host:mysql_port/db_name
mysql_user: your mysql user (ex: root)
mysql_user_password: the user's password (ex: root)
mysql_host: is should contain your mysql container service name
located in your docker-compose.yml file (mysql in this case)
mysql_port: mysql container internal port (3306, in this case)
db_name: the database you want to connect to.
the DATABASE_URL can look like this :
DATABASE_URL=mysql://root:root#mysql:3306/sf4
stop your containers after these changes and start them up again.
Hope this will help.
You have to expose the mysql port 3306:
mysql:
image: mysql
container_name: sf4_mysql
volumes:
- .docker/data/db:/var/lib/mysql
restart: always
ports:
- "3306:3306"
environment:
MYSQL_ROOT_PASSWORD: root
MYSQL_DATABASE: sf4
MYSQL_USER: sf4
MYSQL_PASSWORD: sf4
networks:
- default
I think you're having trouble linking the containers. I suggest that you use a custom network instead of linking. That all containers can see each other