I've got an app engine running and I'm struggling to get the MySQL to connect when it has been deployed. It connects fine on my pc running the dev server, but as soon as I deploy I get this error:
OperationalError: (2004, "Can't create TCP/IP socket (-1)")
Could this be because it is not a cloud sql database ? I've fiddled with a few things like firewall rules and dns things but I honestly just don't know where to even start solving this issue. Some research indicated it might be a TCP/IP vs Unix socket issue which does also kind of make sense as I've got another connection to a cloud sql instance which works fine (using a unix socket). It is a python app, any help is appreciated
You need to enable billing for your project to use socket connections in appengine..
Related
I have a discord.py bot and I host it on Google Cloud RDP (windows). I was working and testing PostgreSQL database on my local computer and it was working like charm now when I tried to use the same code and same connection method on my RDP, I got an error.
This is how I connect to database on my local pc:
How do I connect it with RDP now? Do I need to make any changes to the database like whitelisting the IP and if so How do I do it?
Thanks
If the database is running on your local computer inside your firewall/router, then it cannot be reached from the Internet. If you control your router, you can try forwarding port 5432 on your public IP to port 5432 on your Windows computer. However, it might be better if you just moved the Postgres instance to your cloud instance.
I´m trying to connect to a mysql database installed on a virtual machine with Ubuntu Server. I´m very new to server administration so I followed this tutorial LAMP on it. I also followed this tutorial to install phpMyAdmin. Apparently, everything is working fine. I can access to phpMyAdmin from the web browser on my host machine.
The network of the virtual machine is configured as bridge adapter.
The problem is that I cannot connect when using python (also from host machine). This is the code I'm using:
import mysql.connector
cnx = mysql.connector.connect(user='root', password='XXXXX',
host='192.168.1.138',
port=3306,
database='mysql')
cnx.close()
The code returns this error:
DatabaseError: 1130: Host 'desktop-p7v30jj.home' is not allowed to connect to this MySQL server
I looked for information and found that it could be due to the bind-address. So I edited the file /etc/mysql/mysql.cnf and included the following two lines at the end with no success:
[mysqld]
bind-address = 0.0.0.0
What else should I try? Any idea?
Thanks in advance!
I managed to find the solution by simply creating another user, as stated in this topic:
Host 'xxx.xx.xxx.xxx' is not allowed to connect to this MySQL server
Sorry for answering.
Regards.
I have a python web application, where in, the application connects to a remote database.
Application: flask+uwsgi+nginx .
Database :mysql (remote).
The application exposes rest api for which data is served from remote database.
Everyday after db restoration, mysql service is restarted in the remote database. The connection between my application and remote database breaks, and it starts throwing error message
MySQL server has gone away.
until I manually restart the uwsgi service in my application
sudo service uwsgi restart
The duration between mysql service restart in remote db and uwsgi service restart in my system is the downtime.
Can my application re establish connection as soon as the mysql services are restarted ?
Please suggest any solutions?
It really depends on the way you connect to your database
In case you're using the popular ORMs:
SQLAlchemy ORM
engine = create_engine('mysql+mysqldb://...', pool_recycle=3600)
as stated in the documentation here
Peewee
#app.before_request
def _db_connect():
database.connect()
#app.teardown_request
def _db_close(exc):
if not database.is_closed():
database.close()
as stated in the documentation here
The issue is explained in depth in the mysql documentation here
I have question how can I connect to VPS server and interact with MySQL database using python on my local machine.
I would like to make program using PyQT that connect to my server and update, take sth from db.
I know that there is MySQLdb module but from what I know i cannot connect to VPS server, because in connect method it doesn't take server password argument.
I have a problem which seems impossible to me, meaning I am fundamentally misunderstanding something. I've written a simple API using flask (a python library). This api, among other things, connects to a mysql server running on a remote web server. I am using the sqlalchemy library to perform this connection.
The connection string is quite simple. It looks like this:
db =create_engine('mysql+mysqlconnector://{user}:{password}#{host}:{port}/{database}'.format(user=Constants.Sql.USER, password=Constants.Sql.PASS, host=Constants.Sql.HOST, port=Constants.Sql.PORT, database=Constants.Sql.DATABASE))
connection = db.connect()
On my development machine this all works fine. However, when I deploy the api to a different remote machine, it doesn't work. I get the error:
sqlalchemy.exc.ProgrammingError: (ProgrammingError) 1045 (28000): Access denied for user 'user'#'domain' (using password: YES) None None
This doesn't make any sense to me because it is using exactly the same credentials (they are hard coded).
The working environment is a windows machine, the environment throwing the error is ubuntu 14.04. Both the windows and ubuntu machines are remote to the web server on which the database is running, so it can't be some weird localhost thing.
I am totally stumped with this. If anyone could give me some advice I'd really appreciate it!
Maybe the database only accepts connections from a particular IP address. That would explain why same username and password would succeed on one and fail on the other.
GRANT includes IP address information. Look at the MySQL documentation. Or this tutorial:
https://alvinalexander.com/blog/post/mysql/add-user-mysql/