New MySQL host parameter in the .env file

.env

@@ -2,6 +2,7 @@
 
 # See https://docs.docker.com/compose/environment-variables/#the-env-file
 
+MYSQL_HOST=mysql
 MYSQL_DATABASE=test
 MYSQL_ROOT_USER=root
 MYSQL_ROOT_PASSWORD=root

README.md

@@ -297,13 +297,13 @@ mkdir -p data/db/dumps
 ```
 
 ```sh
-source .env && sudo docker exec mysql mysqldump --all-databases -u"$MYSQL_ROOT_USER" -p"$MYSQL_ROOT_PASSWORD" > "data/db/dumps/db.sql"
+source .env && sudo docker exec $(shell docker-compose ps -q mysqldb) mysqldump --all-databases -u"$MYSQL_ROOT_USER" -p"$MYSQL_ROOT_PASSWORD" > "data/db/dumps/db.sql"
 ```
 
 or
 
 ```sh
-source .env && sudo docker exec mysql mysqldump test -u"$MYSQL_ROOT_USER" -p"$MYSQL_ROOT_PASSWORD" > "data/db/dumps/test.sql"
+source .env && sudo docker exec $(shell docker-compose ps -q mysqldb) mysqldump test -u"$MYSQL_ROOT_USER" -p"$MYSQL_ROOT_PASSWORD" > "data/db/dumps/test.sql"
 ```
 
 #### Restore Database

docker-compose.yml

@@ -31,13 +31,13 @@ services:
             - "8080:80"
         environment:
             - PMA_ARBITRARY=1
-            - PMA_HOST=mysql
+            - PMA_HOST=${MYSQL_HOST}
         restart: always
         depends_on:
             - mysqldb
     mysqldb:
         image: mysql
-        container_name: mysql
+        container_name: ${MYSQL_HOST}
         restart: always
         env_file:
             - ".env"