Re-organise mysql scripts so the app runs without root access

It works better that way with test containers and in k8s.

docker-compose.yml

@@ -3,7 +3,10 @@ mysql:
   ports:
     - "3306:3306"
   environment:
-    - MYSQL_ROOT_PASSWORD=petclinic
+    - MYSQL_ROOT_PASSWORD=
+    - MYSQL_ALLOW_EMPTY_PASSWORD=true
+    - MYSQL_USER=petclinic
+    - MYSQL_PASSWORD=petclinic
     - MYSQL_DATABASE=petclinic
   volumes:
     - "./conf.d:/etc/mysql/conf.d:ro"

src/main/resources/application-mysql.properties

@@ -1,7 +1,7 @@
 # database init, supports mysql too
 database=mysql
 spring.datasource.url=jdbc:mysql://localhost/petclinic
-spring.datasource.username=root
+spring.datasource.username=petclinic
 spring.datasource.password=petclinic
 # SQL is written to be idempotent so this is safe
 spring.datasource.initialization-mode=always

src/main/resources/db/mysql/petclinic_db_setup_mysql.txt

@@ -18,8 +18,10 @@
         mysql_1_eedb4818d817 | MySQL init process done. Ready for start up.
         ...
 
-2) Create the PetClinic database and user by executing the "db/mysql/{schema,data}.sql"
-   scripts (or set "spring.datasource.initialization-mode=always" the first time you run the app).
+2) (Once only) create the PetClinic database and user by executing the "db/mysql/user.sql"
+   scripts. You can connect to the database running in the docker container using 
+   `mysql -u root -h localhost --protocol tcp`, but you don't need to run the script there
+   because the petclinic user is already set up if you use the provided `docker-compose.yaml`.
 
 3) Run the app with `spring.profiles.active=mysql` (e.g. as a System property via the command
    line, but any way that sets that property in a Spring Boot app should work).

src/main/resources/db/mysql/schema.sql

@@ -1,13 +1,3 @@
-CREATE DATABASE IF NOT EXISTS petclinic;
-
-ALTER DATABASE petclinic
-  DEFAULT CHARACTER SET utf8
-  DEFAULT COLLATE utf8_general_ci;
-
-GRANT ALL PRIVILEGES ON petclinic.* TO pc@localhost IDENTIFIED BY 'pc';
-
-USE petclinic;
-
 CREATE TABLE IF NOT EXISTS vets (
   id INT(4) UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY,
   first_name VARCHAR(30),

src/main/resources/db/mysql/user.sql

@@ -0,0 +1,7 @@
+CREATE DATABASE IF NOT EXISTS petclinic;
+
+ALTER DATABASE petclinic
+  DEFAULT CHARACTER SET utf8
+  DEFAULT COLLATE utf8_general_ci;
+
+GRANT ALL PRIVILEGES ON petclinic.* TO 'petclinic@%' IDENTIFIED BY 'petclinic';