Automation script for MySQL 8.0 data migration

examples/migration-8.0/.env

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+DB_ROOT_PASSWORD='secret'
+DB_USER='testuser'
+DB_PASSWORD='password'
+DB_DATABASE='testdb'
+MYSQL_name='mysql-container'
+MARIADB_DUMP_name='mariadb-container-dump'
+MARIADB_MIGRATED_name='mariadb-migrated-mysql8.0'

examples/migration-8.0/.gitignore

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+dump-data/*

examples/migration-8.0/compose-mysql8.0.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:8.3.0
+    healthcheck:
+      test: ["CMD", "mysqladmin", "ping", "-h", "127.0.0.1", "--silent"]
+      interval: 20s
+      timeout: 20s
+      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
+    networks:
+      - backend
+
+# Sidecar for dumping files
+  mariadb-dump:
+    environment:
+      MARIADB_ROOT_PASSWORD: ${DB_ROOT_PASSWORD}
+      MARIADB_USER: ${DB_USER}
+      MARIADB_PASSWORD: ${DB_PASSWORD}
+      MARIADB_DB: ${DB_DATABASE}
+      MYSQL_CONT_NAME: ${MYSQL_name}
+    container_name: ${MARIADB_DUMP_name}
+    image: mariadb:lts
+    depends_on:
+     mysql:
+       condition: service_healthy
+    healthcheck:
+      test: ["CMD", "healthcheck.sh", "--connect", "--innodb_initialized"]
+      start_period: 10s
+      interval: 20s
+      timeout: 20s
+      retries: 3
+    volumes:
+      - mysqldump:/etc/dump/
+      - ./dump-mysql.sh:/docker-entrypoint-initdb.d/dump-mysql.sh
+    networks:
+      - backend
+
+# Sidecar for insert dump file
+  mariadb-migrated-from-mysql8:
+    environment:
+      MARIADB_ROOT_PASSWORD: ${DB_ROOT_PASSWORD}
+      MARIADB_USER: ${DB_USER}
+      MARIADB_PASSWORD: ${DB_PASSWORD}
+      MARIADB_DB: ${DB_DATABASE}
+    container_name: ${MARIADB_MIGRATED_name}
+    image: mariadb:lts
+    depends_on:
+     mariadb-dump:
+       condition: service_healthy
+      #  restart: true
+    volumes:
+      - mysqldump:/etc/dump/
+      - ./migrate-mariadb.sh:/docker-entrypoint-initdb.d/migrate-mariadb.sh
+    networks:
+      - backend
+
+volumes:
+  dbdata: {}
+  # sudo chown -R 999:999 ${PWD}/dump-data # on host before running this file
+  mysqldump:
+    driver: local
+    driver_opts:
+      type: none
+      device: "${PWD}/dump-data"
+      o: bind
+
+networks:
+  backend:

examples/migration-8.0/dump-mysql.sh

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+#!/bin/bash
+
+echo 'MariaDB service started.'
+# Run your commands and exit container
+whoami # mysql
+# sh -c "chown -R mysql:mysql /etc/dump" # Operation permitted
+echo 'Dump and compress MySQL data with changed collation ...'
+fileName="mysql-dump-data.sql.zst"
+if [ -f "$fileName" ]; then
+    echo "File ${fileName} exists. Remove it ... "
+    rm "$fileName"
+fi
+sh -c "mariadb-dump -h${MYSQL_CONT_NAME} -uroot -p${MARIADB_ROOT_PASSWORD} ${MARIADB_DB} | sed 's/utf8mb4_0900/uca1400/g' | zstd > /etc/dump/${fileName}"

examples/migration-8.0/migrate-mariadb.sh

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+#!/bin/bash
+echo "Extract file"
+oldFile="/etc/dump/mysql-dump.sql"
+if [ -f "$oldFile" ]; then
+    echo "Old file ${oldFile} exists. Remove it ... "
+    rm "$oldFile"
+    echo "Extracting ..."
+fi
+sh -c "zstd -d /etc/dump/mysql-dump-data.sql.zst -o /etc/dump/mysql-dump.sql"
+echo "Show data in MariaDB"
+mariadb -uroot -p"${MARIADB_ROOT_PASSWORD}" -e "create database testdb;"
+mariadb -uroot -p"${MARIADB_ROOT_PASSWORD}" "${MARIADB_DB}" < /etc/dump/mysql-dump.sql
+mariadb -uroot -p"${MARIADB_ROOT_PASSWORD}" -e "show databases; select * from testdb.countries;"

examples/migration-8.0/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");