Issue for q2a import

I’m importing question2answer site and followed below steps. Script is not able to connect to db. anyone please help me on this.

I took ref from vBulletin thread

Docker install Server


  1. Installed discourse using 30 min guide and it worked perfectly fine.
  2. entered app using below commands

cd /var/discourse
./launcher enter app

  1. Installed Mariadb as I was not able to install mysql:

apt-get update && apt-get install libmariadb-dev mariadb-server-10.3

  1. After finishing installing Mariadb check its status and started:

sudo service mysql status
sudo service mysql start

  1. Install dependencies

echo “gem ‘mysql2’, require: false” >> /var/www/discourse/Gemfile
echo “gem ‘php_serialize’, require: false” >> /var/www/discourse/Gemfile
cd /var/www/discourse
su discourse -c ‘bundle install --no-deployment --without test --without development --path vendor/bundle’

  1. Imported database

mysql -uroot -p -e ‘CREATE DATABASE q2adb’
mysql -uroot -p q2adb < q2a-old-db.sql

  1. exported below variables, I dont have any attachments so not exported that variable. also not set password for root user.

export DB_NAME=“q2adb”
export DB_USER=“root”
export DB_PW=“”
export TABLE_PREFIX=“qa_”
export TIMEZONE=“America/Los_Angeles”

cd /var/www/discourse
su discourse -c ‘bundle exec ruby script/import_scripts/question2answer.rb’

This is the error I’m getting now after running below command.

/var/www/discourse# su discourse -c ‘bundle exec ruby script/import_scripts/question2answer.rb’
root:@localhost wants q2adb
Loading existing groups…
Loading existing users…
Loading existing categories…
Loading existing posts…
Loading existing topics…

Access denied for user ‘root’@‘localhost’
Cannot connect in to database.

Hostname: localhost
Username: root
database: q2adb

Edit the script or set these environment variables:

export DB_HOST=“localhost”
export DB_NAME=“”
export DB_PW=‘password’
export DB_USER=“root”
export TABLE_PREFIX=“qa_”


1 Like

Either you need to set a password or maybe a host name? You installed mysql inside the container?

Can you connect to mysql from the command line and see that there is data there. (Show tables :wink:



I’m inside container.

I tried setting Hostname to localhost, ‘’, ip-171-22-11-150 (this is shown as a hostname when I issue command >hostname) and with actual IP address of server.

I also set password for a root users. I do see tables in db got imported correctly from q2a.

Am I missing any step?

1 Like

discourse experts, please help me on this. I dont know how to proceed at the moment.

Thanks for your help in advance!

1 Like

The traditional way to incentivize people to give you extra help is to pay money for it, you could post in #marketplace with a budget.

1 Like

Hello Discourse Community,

@sat have you found a solution for this yet ?

I ran into the same error while trying to migrate from vBulletin5 using the Docker part of the same thread.

I also installed MariaDB instead of MySQL:

apt-get update && apt-get install libmariadb-dev mariadb-server-10.3

I imported my SQL data and I am able to connect to the database and see that the tables are created:

mysqlcheck -c vb5  -u root -p

At first, I used the default login (root / blank) and in a second attempt I set a password for the root user:

export DB_NAME="vb5"
export DB_USER="root"
export DB_PW="password1234"
export TABLE_PREFIX="vb5."
export ATTACHMENT_DIR='/vb5-attachments'
export TIMEZONE='Europe/Berlin'

cd /var/www/discourse
su discourse -c 'bundle exec ruby script/import_scripts/vbulletin5.rb'

I am not sure about the TABLE_PREFIX here. But all table names start with vb5. in my default installation - so I guess this should be ok (I also tried leaving it empty).

But the main issue is that I cannot connect to the MariaDB database with the discourse user:

su discourse -c 'bundle exec ruby script/import_scripts/vbulletin5.rb'
Loading existing groups...
Loading existing users...
Loading existing categories...
Loading existing posts...
Loading existing topics...
Traceback (most recent call last):
        5: from script/import_scripts/vbulletin5.rb:632:in `<main>'
        4: from script/import_scripts/vbulletin5.rb:632:in `new'
        3: from script/import_scripts/vbulletin5.rb:27:in `initialize'
        2: from script/import_scripts/vbulletin5.rb:27:in `new'
        1: from /var/www/discourse/vendor/bundle/ruby/2.6.0/gems/mysql2-0.5.2/lib/mysql2/client.rb:90:in `initialize'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/mysql2-0.5.2/lib/mysql2/client.rb:90:in `connect': Access denied for user 'root'@'localhost' (Mysql2::Error)
su discourse
mysqlcheck -c vb5  -u root -p
Enter password: #password1234
mysqlcheck: Got error: 1698: Access denied for user 'root'@'localhost' when trying to connect

Ok I am now a step closer into getting this to work. I was able to get the discourse user to connect.

  1. Connect into the Discourse container as root.
  2. Connect to the MariaDB Database
mysql -u root -p
*enter your password*
update mysql.user set plugin = 'mysql_native_password' where User='root';

Then switch to the discourse user and try to connect to the database with the root account:

su discourse
mysql -u root -p
Enter password: #password1234

And you should see the SQL shell, when before you were getting an access denied.

Now exit the discourse user and try to run the migration script again:

su discourse -c 'bundle exec ruby script/import_scripts/vbulletin5.rb'

Now the script is running (but I am getting a vBulletin5 related error I have to figure out next)