Django 连接远程 Mysql OperationalError 2026

Question

I'm using Django + mysql for days. And this morning I suddenly found that I cannot get connect with the remote mysql.

% python manage.py makemigrations

it raise

django.db.utils.OperationalError: (2026, 'SSL connection error: SSL_CTX_set_tmp_dh failed')

also when

python manage.py runserver

Here's my environment:

macOS 10.15 + Django 2.2.6 + MySQL 5.7 (on a remote server, ubuntu 18.04) + python 3.6.8 (use conda env)

I've looked for some solutions like:

• downgrade openssl

  Package openssl conflicts for: openssl=1.0.2r python=3.6.8 -> openssl[version='>=1.1.1a,<1.1.2a']

• add use_pure=True in my .conf file

  nothing changed

• add skip_ssl in my .conf file

  nothing changed

note

• On the server (which I deploy my site, ubuntu 18.04) my site run well using gunicorn + Nginx
• All the things worked well until today.
• The site broke when I found this issue but work well when I restart it.
• I guess maybe some update on the server (automatically upgrade) to cause the problem, but haven't find it yet.

some of my code

# setting.py


DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.mysql',
        'OPTIONS': {
            'read_default_file': mysqlPath,
            'init_command': 'SET default_storage_engine=INNODB',
        },
    }
}

# my_remote.cnf (which define the 'mysqlPath' in setting.py)

[client]
database = mydatabase
user = myusername
password = mypassword   
default-character-set = utf8
host = myremotehost
port = 3306
use_pure = True
skip-ssl
skip_ssl
skip-ssl = True
skip_ssl = True

Answer 1

It is because your server isn't set up for SSL (yet). Thus, the error is caused on the server-side.

As already mentioned and tried successfully, a solution is to either make the server SSL-ready or set skip_ssl to true while in development.

https://dev.mysql.com/doc/refman/5.7/en/using-encrypted-connections.html