ER_NOT_SUPPORTED_AUTH_MODE-MySQL 服务器


连接 Node.js Server到 MySQL-Database失败

        我在 “ Node.js 服务器”上安装了 MariaDB，但是决定使用 SQL 数据库。我卸载并完全删除了 “ MariaDB”，然后继续安装 “ Community Ed”< strong > “ MySQL Database” ‘ MySQL Setup Process‘ * * ，我多次尝试通过一个 JavaScript 文档连接到数据库，该文档实现了一个 JS DB Connection 的事实代码片段ーー < em > 我的 DB-connect 文档作为一个代码片段发布在下面ーー如下面 的代码片段所示。令人失望的是，JS/SQL 连接每次尝试都失败了。



下面是我收到的失败连接错误消息:


"ER_NOT_SUPPORTED_AUTH_MODE: Client does not support authentication
protocol requested by server. Consider upgrading MariaDB client."



我正在使用的 JS/SQL 连接片段:


var mysql = require('mysql');
    

var connection = mysql.createConnection({
host     : 'localhost',
user     : 'root',
password : '********',
database : 'foobarDb'
});
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最佳答案

I figure that some MySQL versions have the authentication for the establishment of a connection a bit messed up. All I had to do was add the line "insecureAuth" : true to the CreateConnection(...) credentials.

var connection = mysql.createConnection({
host     : 'localhost',
user     : 'root',
password : '********',
database : 'vod_bill_database',
insecureAuth : true
});

The error is gone now, and the client is successfully connecting.

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For MySQL v8.0 use the following:

ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY 'password'
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try the older version of mysql like 5.6.40, it uses by default SHA256_password auth where new version 8.0. uses by default sha2_password auth which is more secure and throw this 身份验证协议错误. MYSQL installer 5.6.40

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var connection = mysql.createConnection({
host     : 'localhost',
user     : 'root',
password : '********',
database : 'vod_bill_database',
port : 3308
});

I had the same error and since i changed my port in phpmyadmin from 3306 to 3308 therefore here also i had to write port: 3308 and it started working.

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enter image description here

You need to reconfigure the Quick Action Settings by clicking the "Reconfigure Link" as shown in the screenshot below. From there, select "Legacy password" for v5.1.


The cause of the error:

You installed the latest "MySQL Version", v8.0. The latest version has a different encryption plugin for authenticating users at login. 5.6, and 5.1 revert to the prior encryption algorithms. Please note, ABC1 & 5.1 have several security vulnerabilities reported by oracle.

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in order to overcome this error use the following code:

var connectionString = 'mysql://*root:*password@*localhost/*database?charset=utf8_general_ci&timezone=-0700';
var connection= mysql.createConnection(connectionString);

but make sure that you changed the * marks in the connectionString based on your setup.

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yellow yow bros !

// mysql.ts
const pool = mysql.createPool({
connectionLimit: 10,
host: "localhost",
user: "root",
password: "password",
database: "rest-resume-api",
});

and then I have a docker-compose file such as

# docker-compose.yml


version: '3.3'


services:
db:
image: mysql
restart: always
command: --default-authentication-plugin=mysql_native_password
environment:
MYSQL_DATABASE: 'rest-resume-api'
MYSQL_USER: 'root'
MYSQL_ROOT_PASSWORD: 'password'
ports:
- '3306:3306'
expose:
- '3306'
volumes:
- my-db:/var/lib/mysql2
volumes:
my-db:
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1st run this code -> 

ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY 'password';

2nd 

flush privileges;
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You can either alter an existing user to use mysql_native_password, or create a new user,

CREATE USER 'new_user'@'%' IDENTIFIED WITH mysql_native_password BY '***';
GRANT USAGE ON *.* TO 'new_user'@'%';
ALTER USER 'new_user'@'%' REQUIRE NONE WITH MAX_QUERIES_PER_HOUR 0 MAX_CONNECTIONS_PER_HOUR 0 MAX_UPDATES_PER_HOUR 0 MAX_USER_CONNECTIONS 0;
GRANT ALL PRIVILEGES ON `new_user`.* TO 'new_user'@'%';
FLUSH PRIVILEGES;

replace new_user with your new user name, and set your password.

Now you can access mysql from node using the mysql package,

 npm install mysql

recommended to use pool connection for this package.

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The top-rated answers in this Q/A thread are for the most part valid, but they are unorganized, which is to say the least. A solution is here, however, the solution is bits and pieces amongst three other answers. To offer an answer that is a single solution, more helpfull, and is a time saver, I'll make an attempt to write an answer myself in a way that is clear, concise, and orderly. I will cover the whole problem that Ubuntu users experiance, and in addition, I will add information that's helpfull, and not included in any other answer, that will help readers understand the issue that persist for them.


To Start: The Issue is not a SQL Problem, it is an Ubuntu Problem

The issue that persist for you, has to do with the fact (a fact most software developers/I.T. professionals are probably all already aware of) the 'ROOT' user doesn't have a password in Ubuntu, and is accessible by anyone with $ sudo privileges. To offer clarity for anyone experiencing this issue who might be new to some of the semantics that I am throwing out there; Ubuntu users use the sudo -i command to register as the Root-user, whereas, every other Linux distribution in existence uses a User-ID w/ a Password. In truth, I cannot remember ever needing to be a ROOT user for anything other than Database Management, and always only when I am first installing a Database to a server, though my experience is probably far limited in comparison to some IT professionals out there. My point is, typically using sudo for everything does the Job, but in this case it is problematic, so the important thing to note is the following:


PROBLEM:

Ubuntu lacks a 'ROOT PASSWORD' and this is why everyone experiencing the issue that we are discussing runs a Distribution of the Ubuntu OS/SHELL. And unless we rewrite the Ubuntu kernel, and the practically everything else in the operating system, we cannot give Ubuntu SHELL a "root password".


SOLUTION:

We may not be able to give the Ubuntu SHELL a root password, but we can, and we will, give MySQL a 'ROOT PASSWORD'.




TO EXECUTE THE SOLUTION YOU NEED TO HAVE THE FOLLOWING:

  1. Node.js v12+
  2. NPM (Probably need v5+ but don't quote me on that)
  3. MySQL v8.0+ (obviously)
  4. The MySQL Driver (from npm)



CONFIRMATION:
If you don't already have everything on the list you honestly can't say that this is the issue your dealing with.
If you do have everything on the list

and you are running an Ubuntu distro, then you should be getting an error message that probably looks somthing like the one I got when I had to fix this issue.

My error message read:
ERROR: (28000): Access denied for user 'ajc'@'localhost'
ERROR: ERROR_NOT_SUPPORTED_AUTH_MODE: Client does not support
authentication protocol requested by server; consider upgrading
MySQL client


'Client does not support authentication protocol requested by server; consider upgrading MySQL client
If your still reading then your likely in the right place.

  1. To start fixing the problem create an empty Node.js project, and install the MySQL driver as a dependency to it using NPM (you should know how to do this, as you had to do that to have this issue). Add a JavaScript .js file. Call the file, sqltest.js or whatever something like that.

  2. Add the code below to the file you just created.

let mysql = require('mysql');


let connection = mysql.createConnection({
host     : 'localhost',
user     : 'root',
password : '********',
database : 'DB_App_00',
});


connection.connect(function(err) {
if (err) {
return console.error('error: ' + err.message);
}
  

console.log('Connected to the MySQL server.');
});

  1. In the method called 'createConnection' is a JSON OBJ parameter holding the credential values to make a valid connection to the MySQL database server. The user has to equal to 'root', and the database has to exist. Also for a later test add a testing table to the database, with some BS data."

  2. Now open a terminal window, and do your typical updates & upgrades, this is important, which is why every tutorial asks you to do them.

~$: sudo apt update
~$: sudo apt upgrade

  1. After you do your upgrades enter the following command into your terminal:
~$: sudo mysql -u root
  1. It should prompt you for your Ubuntu Password, type it and [ENTER].

The next step is critically important:
  1. Now here is the step that could be considered the medicine and/or the cure to the problem. Your terminal should be open, and you should be inside of the MYSQL Server, under the user 'root'. The terminal should have the cursor flashing at a blank mysql command-line. Within the CMDL copy & paste this:

mysql> ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY 'ChoosePassword';


mysql> FLUSH PRIVILEGES;

  1. The next part is obvious, change 'ChoosePassword' to a password you will remember while leaving the password within single quotation marks. Change absolutely nothing else, press [ENTER]

  2. If you followed the steps correctly, you now have a MySQL 'ROOT USER' with its own password now. Test it by copy and paste the following at the Ubuntu CMDL:

 ~$: mysql -u root -p
  • It will prompt you for your new password, type it and [ENTER]

...you should be in, now exit.

mysql>exit
  1. Back to your 'testsql.js' file, alter the credentials to root for the user, password to your password, a valid database, and host to localhost, unless you have a unique need for a different hostname.

let connection = mysql.createConnection({
host     : 'localhost',
user     : 'root',
password : '********',
database : 'DB_App_00',
});
  1. now use node to run the node test file
~$: node testsql.js

Final Thought:

If it doesn't say connected you did something wrong, but if all went well, you should connect. It took some effort before I got it to work, but this answer should save you some time from reading all the other half written answers.

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just create a new user on MySQL

CREATE USER 'foo'@'localhost' IDENTIFIED WITH mysql_native_password BY 'bar';
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You can use the package mysql2 instead of mysql. I ran into the same issue and using mysql2 worked for me.

You can install this package using npm i mysql2

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you can do it

ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY 'password'


ALTER USER 'root'@'%' IDENTIFIED WITH mysql_native_password BY 'password'


FLUSH PRIVILEGES;

check mysql root user IDENTIFIED

select user,host,plugin from user;


+------------------+-----------+-----------------------+
| user             | host      | plugin                |
+------------------+-----------+-----------------------+
| root             | %         | mysql_native_password |
| mysql.infoschema | localhost | caching_sha2_password |
| mysql.session    | localhost | caching_sha2_password |
| mysql.sys        | localhost | caching_sha2_password |
| root             | localhost | mysql_native_password |
+------------------+-----------+-----------------------+

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