OperationalError: (2002, "Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2)")

Question

when connecting to mysql database in Django ,I get the error.

1. I'm sure mysql server is running.

2. /var/run/mysqld/mysqld.sock doesn't exist.

3. When I run $ find / -name *.sock -type s, I only get /tmp/mysql.sock and some other irrelevant output.

4. I added socket = /tmp/mysql.sock to /etc/my.cnf. And then restared mysql, exited django shell, and connected to mysql database. I still got the same error.

I searched a lot, but I still don't know how to do.

Any help is greate. Thanks in advance.

Well, I just tried some ways. And it works. I did as follows.

1. Add socket = /tmp/mysql.sock .Restart the mysql server.
2. ln -s /tmp/mysql.sock /var/lib/mysqld/mysqld.sock

I met an another problem today. I can't login to mysql. I'm newbie to mysql. So I guess mysql server and client use the same socket to communicate. I add socket = /var/mysqld/mysqld.sock to [mysqld] [client] block in my.cnf and it wokrs.

Arabeila

Could you connect locally to your MySQL server using MySQL CLI? (Something like that: mysql -u you_user_name -p) – Talkington

What is your DATABASES settings? – Downwash

I can connect to mysql server using mysql -u user_name -p . I set database as django recomended – Arabeila

Could you set socket = /var/run/mysqld/mysqld.sock directly? That way you don't have to link /tmp/mysql.sock to that path manually. – Waldgrave

possible duplicate of Can't connect to local MySQL server through socket '/var/mysql/mysql.sock' (38) – Reedreedbird

Possible duplicate of ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2) – Serrano

Answer 1

Use "127.0.0.1", instead of "localhost"

DATABASES = {
   'default': {
      'ENGINE': 'django.db.backends.mysql',
      'NAME': 'django',
      'USER': 'root',
      'PASSWORD': '',
      'HOST': '127.0.0.1',
      'PORT': '3306',
   }
}

Pondweed

Any idea why that would make any difference? Isn't localhost the same as 127.0.0.1 in most cases? – Proportionable

This is one of those bittersweet moments we all have in software development sometime: I'm glad it worked, but at the same time I have no idea WHY it did work. Thanks nonetheless. – Mccandless

Answer 2

For me this worked add OPTIONS attribute with read_default_file and give it the path of my.cnf file

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.mysql',
        'NAME': 'dbname',
        'USER': 'root',
        'PASSWORD': '',
        'HOST': 'localhost',
        'PORT': '3306',
        'OPTIONS': {
            'read_default_file': '/opt/lampp/etc/my.cnf',
        }
    }
}

Towardly

Answer 3

You need to change your HOST from 'localhost' to '127.0.0.1' and check your django app :)

Pact

Answer 4

in flask, you may use that

app=Flask(__name__)

app.config["MYSQL_HOST"]="127.0.0.1
app.config["MYSQL_USER"]="root"...

Participle

Answer 5

I faced this problem when connecting MySQL with Django when using Docker.

Try 'PORT':'0.0.0.0'.

Do not use 'PORT': 'db'. This will not work if you tried to run your app outside Docker.

Temporal