Docker How to completely reset MariaDB?答案

【问题标题】：Docker How to completely reset MariaDB?Docker How to completely reset MariaDB?
【发布时间】：2023-01-06 21:28:48
【问题描述】：

I have MariaDB on docker

Trying to setup ssl I managed to completely break my user; I ended up with user duplicates and a new user called testssl

I tried resetting everything by deleting my database; deleting the image but nothing works. Every time I connect to the database and list users I get the same old list; testssl is still there

Where are those settings stored and how do I reset MariaDB to a completely clean state on my docker?

app:
    container_name: app
    image: "${APP_IMAGE}"
    restart: always
    build: build/app
    env_file: .env
    networks:
      - app_network
    volumes:
      - "${APP_HOST_DIR}:${APP_CONTAINER_DIR}"
    depends_on:
      - database

  database:
    container_name: mariadb
    image: "mariadb:${MARIADB_VERSION}"
    restart: always
    env_file: .env
    volumes:
      - "${SQL_INIT}:/docker-entrypoint-initdb.d"
      - type: bind
        source: ${MARIADB_DATA_DIR}
        target: /var/lib/mysql
      - type: bind
        source: ${MARIADB_LOG_DIR}
        target: /var/logs/mysql
      - type: bind
        source: ${MARIADB_CERTS_DIR}
        target: /etc/certs/
    environment:
      MYSQL_ROOT_PASSWORD: "${MYSQL_ROOT_PASSWORD}"
      MYSQL_DATABASE: "${MYSQL_DATABASE}"
      MYSQL_USER: "${MYSQL_USER}"
      MYSQL_PASSWORD: "${MYSQL_PASSWORD}"

.env

MARIADB_DATA_DIR=./build/database/files/database
MARIADB_LOG_DIR=./build/database/files/logs
MARIADB_CERTS_DIR=./build/database/certs

【问题讨论】：

delete /var/lib/mysql & ./build/database/files/database
How did you get "user duplicates"? If you use create user this won't happen.

标签： docker mariadb

【解决方案1】：

MariaDB stores all of its runtime configuration (users, databases, etc.) in its data directory.

You've told your MariaDB container to use the host build/database/files/database directory for its data, so resetting the container won't do much since the data is, well, there.

Assuming the container is well-behaved and will initialize the database system if there's nothing in the data directory, you should be able to move that build/database/files/database folder to e.g. build/database/files/database.old, and create a new empty build/database/files/database, then retry.

【讨论】：

The paths are relative in his .env file.
@Marc Fixed already. Haven't had enough coffee yet.

【解决方案2】：

If you are using docker volumes you can:

Rename the docker volume
From
```
mariadb:
image: mariadb:10.6.11
...
volumes:
  - mysqldataprevious:/var/lib/mysql
...
```
To
```
mariadb:
image: mariadb:10.6.11
...
volumes:
  - mysqldatanew:/var/lib/mysql
...
```
1. Restart docker services
  
  docker-compose up -d
2. Remove previous volume (optional)
  
  docker volume prune
This will install a fresh mariadb in the new volume and withdocker volume pruneif your previous volume is not used by another container it will be deleted

【讨论】：