MDBF-633: Docker compose file example for MySQL 5.7 migration

examples/migration-5.7/.env

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+DB_ROOT_PASSWORD='secret'
+DB_USER='testuser'
+DB_PASSWORD='password'
+DB_DATABASE='testdb'
+MYSQL_name='mysql-container'
+MYSQL_MIGRATE_name='mysql-container-migrated'

examples/migration-5.7/compose-migrate-mysql.yml

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+version: "3"
+x-common-variables: &common-variables
+  MYSQL_ROOT_PASSWORD: ${DB_ROOT_PASSWORD}
+  MYSQL_USER: ${DB_USER}
+  MYSQL_PASSWORD: ${DB_PASSWORD}
+
+services:
+  mariadb-from-mysql57:
+    environment:
+      MYSQL_ROOT_PASSWORD: ${DB_ROOT_PASSWORD}
+      MYSQL_USER: ${DB_USER}
+      MYSQL_PASSWORD: ${DB_PASSWORD}
+      MARIADB_AUTO_UPGRADE: 1
+    container_name: ${MYSQL_MIGRATE_name}
+    image: mariadb:lts
+    volumes:
+      # MySQL data that we want to migrate
+      - dbdata:/var/lib/mysql
+
+volumes:
+  dbdata: {}

examples/migration-5.7/compose-mysql.yml

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+version: "3"
+
+services:
+  mysql:
+    environment:
+      MYSQL_ROOT_PASSWORD: ${DB_ROOT_PASSWORD}
+      MYSQL_USER: ${DB_USER}
+      MYSQL_PASSWORD: ${DB_PASSWORD}
+      MYSQL_DATABASE: ${DB_DATABASE}
+    container_name: ${MYSQL_name}
+    image: mysql:5.7
+    healthcheck:
+      test: ["CMD", "mysqladmin", "ping", "-h", "127.0.0.1", "--silent"]
+      interval: 5s
+      timeout: 3s
+      retries: 2
+      start_period: 0s
+    volumes:
+      # Preload files for MySQL data
+      - ./mysql:/docker-entrypoint-initdb.d:z
+      # We have to save MySQL volume that will be used in upgrade
+      - dbdata:/var/lib/mysql
+volumes:
+  dbdata: {}
+
+networks:
+  backend:

examples/migration-5.7/mysql/mysql-data.sql

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+DROP TABLE IF EXISTS countries;
+CREATE TABLE countries(name char(20));
+INSERT INTO countries values ("Bosnia & Herzegovina");