Authentication error using phpmyadmin and docker-compose - mysql

Question

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

Answer 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).

Answer 2

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