i have added the network name "backend" connected all of the instances to it now the containerers are able to talk to each other.

Best practice you can also add a frontend network and connect the frontend applications to the frontend network so both networks are separated.

Author: alainseys

development/docker-compose.yml

@@ -18,10 +18,8 @@ services:
       WORDPRESS_DB_PASSWORD: "${DB_ROOT_PASSWORD}"
     depends_on:
       - db
-
-    links:
-      - db
-
+    networks:
+      - backend
   wpcli:
     image: wordpress:cli
     container_name: cc-base-wp-cli
@@ -36,9 +34,8 @@ services:
     depends_on:
       - db
       - wp
-    links:
-      - db:db
-
+    networks:
+      - backend
   pma:
     image: phpmyadmin/phpmyadmin
     container_name: cc-base-phpmyadmin
@@ -49,9 +46,8 @@ services:
       MYSQL_ROOT_PASSWORD: "${DB_ROOT_PASSWORD}"
     ports:
       - ${IP}:8080:80
-    links:
-      - db:db
-
+    networks:
+      - backend
   db:
     build:
       context: ./bin/${DATABASE} #change db if required in .env file
@@ -65,6 +61,8 @@ services:
       MYSQL_DATABASE: "${DB_NAME}"
       MYSQL_USER: root
       MYSQL_ROOT_PASSWORD: "${DB_ROOT_PASSWORD}"
+    networks:
+      - backend
 
   composer:
     image: composer/composer
@@ -79,3 +77,8 @@ services:
 
 volumes:
   db_data:
+
+
+networks:
+  backend:
+