add mysql and docker-compose.yml

problem1/docker-compose.yml

@@ -5,6 +5,10 @@ networks:
     ipam:
       config:
         - subnet: 10.0.0.0/16
+  back:
+    ipam:
+      config:
+        - subnet: 10.10.0.0/16
 
 volumes:
   socket:
@@ -16,11 +20,29 @@ volumes:
 
 services:
   app:
-    build: app/
     container_name: minimal_sns_app
-    volumes: 
-      - socket:/var/run/unicorn/
+# NOTE: for ruby
+#    build: app/ruby
+#    volumes:
+#      - socket:/var/run/unicorn/
+# NOTE: for go
+    build: app/go
+    ports:
+      - "1323:1323"
     networks:
       - front
+      - back
     environment:
       - "TZ=Asia/Tokyo"
+  db:
+    image: mysql:latest
+    container_name: db
+    networks:
+      - back
+    volumes:
+      - ./mysql/my.cnf:/etc/mysql/my.cnf
+      - ./mysql/conf.d/mysql.cnf:/etc/mysql/conf.d/mysql.cnf
+      - ./mysql/0_init.sql:/docker-entrypoint-initdb.d/0_init.sql
+    environment:
+      MYSQL_ALLOW_EMPTY_PASSWORD: yes
+      MYSQL_DATABASE: app

problem1/mysql/0_init.sql

@@ -0,0 +1,20 @@
+CREATE TABLE `users` (
+  `id` bigint(20) NOT NULL AUTO_INCREMENT,
+  `user_id` int(11) NOT NULL,
+  `name` varchar(64) DEFAULT '' NOT NULL,
+  PRIMARY KEY (`id`)
+);
+-- user1 user2
+CREATE TABLE `friend_link` (
+  `id` bigint(20) NOT NULL AUTO_INCREMENT,
+  `user1_id` int(11) NOT NULL,
+  `user2_id` int(11) NOT NULL,
+  PRIMARY KEY (`id`)
+);
+-- user1 user2 block
+CREATE TABLE `block_list` (
+  `id` bigint(20) NOT NULL AUTO_INCREMENT,
+  `user1_id` int(11) NOT NULL,
+  `user2_id` int(11) NOT NULL,
+  PRIMARY KEY (`id`)
+);

problem1/mysql/conf.d/mysql.cnf

@@ -0,0 +1,29 @@
+# Copyright (c) 2015, 2021, Oracle and/or its affiliates.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License, version 2.0,
+# as published by the Free Software Foundation.
+#
+# This program is also distributed with certain software (including
+# but not limited to OpenSSL) that is licensed under separate terms,
+# as designated in a particular file or component or in included license
+# documentation.  The authors of MySQL hereby grant you an additional
+# permission to link the program and your derivative works with the
+# separately licensed software that they have included with MySQL.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License, version 2.0, for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
+
+#
+# The MySQL  Client configuration file.
+#
+# For explanations see
+# http://dev.mysql.com/doc/mysql/en/server-system-variables.html
+
+[mysql]

problem1/mysql/my.cnf

@@ -0,0 +1,29 @@
+# Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; version 2 of the License.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
+
+#
+# The MySQL  Server configuration file.
+#
+# For explanations see
+# http://dev.mysql.com/doc/mysql/en/server-system-variables.html
+
+[mysqld]
+pid-file        = /var/run/mysqld/mysqld.pid
+socket          = /var/run/mysqld/mysqld.sock
+datadir         = /var/lib/mysql
+secure-file-priv= NULL
+
+# Custom config should go here
+!includedir /etc/mysql/conf.d/