mariadb为了与mariadb兼容，您必须安装软件包mariasql@0.1.20，或更高。配置需要如下所示：

var sequelize = new Sequelize('database', 'username', 'password', {
  dialect: 'mariadb'
})

或者试试这个：
mariasql公司：https://www.npmjs.com/package/mariasql
绑定到mariadb的非阻塞（mysql兼容）客户端库的node.js。

var Client = require('mariasql');
var c = new Client({
  host: '127.0.0.1',
  user: 'foo',
  password: 'bar'
});
c.query('SHOW DATABASES', function(err, rows) {
  if (err)
    throw err;
  console.dir(rows);
});
c.end();

建议使用mariasql。

https://github.com/mariadb/mariadb-connector-nodejs
npm公司

npm install --save mariadb
    npm install --save sequelize@next

Yarn

yarn add mariadb
    yarn add sequelize@next

const Sequelize = require('sequelize'),
    sequelize = new Sequelize(process.env.db_name, process.env.db_user, process.env.db_pass, {
    dialect: 'mariadb',
    dialectOptions: {
      socketPath: process.env.db_socket,
      timezone: process.env.db_timezone
    },
    pool: {
      min: 0,
      max: 5,
      idle: 10000
    },
    define: {
      charset: 'utf8',
      timestamps: false
    },
    benchmark: false,
    logging: false
  })