I am trying to connect to a MySQL database on someone else's "machine". When I use Navicat for MySQL, I have no problem connecting to it. I am trying to do the same with Python so that I do not have to use the GUI interface. I know all my info below is correct (even though I swap fake info) -- can anyone spot where I went wrong? The error I get is OperationalError: (2005, "Unknown MySQL server host 'FTP_hostname' (0)")
My code (using paramiko for the SSH):
import MySQLdb
import paramiko
import time
ssh = paramiko.SSHClient()
ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
ssh.connect('SSH_hostname', 22, username='me', password='pswrd')
time.sleep(1)
db = MySQLdb.connect(host="FTP_hostname",
user="root",
passwd="pswrd2",
db="MyDB")
cur = db.cursor()
Again, I put all this into Navicat and connect no problem. Hoping you can help! Thanks!
MySQL, like most databases, by default runs locally and disallows access from outside networks. As such, you cannot connect to it from an external computer.
Navicat, being a software explicitely for remote administration of databases, likely connects via SSH and tunnels the MySQL connection over it. That way it can act as if the database was installed locally, and for the database it looks as if it was accessed locally.
You could try to do the same by creating a tunnel using Paramiko; see also this question.
If you still in need of connecting to a remote MySQL db via SSH I have used a library named sshtunnel, that wraps ands simplifies the use of paramiko (a dependency of the sshtunnel).
You can check my answer in another similar question with some sample code to use it.
db = MySQLdb.connect(host="FTP_hostname",
Would the host not need to be 127.0.0.1 (localhost) as the tunnel is making the MySQL DB local to the machine that the python script is running on?
Related
I am trying to walk through some basic tutorials to refresh myself with using MySQL with python3, and am hitting a snag immediately:
import mysql.connector
host='localhost'
user='root'
passwd='pwd'
mydb=mysql.connector.connect(host=host, user=user, password=passwd)
Running this, I get the error mysql.connector.errors.InterfaceError: 2003: Can't connect to MySQL server on 'localhost:3306' (61 Connection refused)
I can't find information on what I need to do outside of python to get this to work, it's not clear what authentication it's referring to. My unix username and password? I certainly don't want to store the latter in plaintext. I could enter it in manually (rather not). Is there a minimal set of instructions to get to the point where I can set up a cursor? Is there a way to set this up without a username and password? Any setup outside of my python environment I need to do, like in ipconfig/ifconfig?
I created a connection to a remote, tunneled MySQL server over the PyCharm GUI in the "Database" menu.
I'm trying to use this connection in the code itself, without connecting manually again to the SQL server and tunelling over SSH in the code.
Is this possible? I couldn't find anything relevant on the internet yet.
Thanks!
I did a python -m pip install mysql-connector and able to successfully run import mysql.connector through python. But when I am trying to run the below code.
import mysql.connector
mydb = mysql.connector.connect(
host="localhost",
user="yourusername",
passwd="yourpassword"
)
print(mydb)
It is failing with InterfaceError: 2003: Can't connect to MySQL server on 'localhost:3306' (10061 No connection could be made because the target machine actively refused it)
Since I did pip install for mysql.connector I am not sure of user and passwd.
I connected my database instance from Amazon RDS to mySql workbench, created a python file that looks like his and got the exact error. Everyone says you could have a system firewall problem but nothing straight forward.
The connector is just a means of communicating with a mysql database programically.
You need this, or access to a mysql server to use the connector.
https://dev.mysql.com/downloads/mysql/
The host is obviously localhost when you want to access it locally on your machine. This only works if the server is running on your machine. You can connect a remote server by changing the host to a valid IP address and providing valid credentials. If you use it remotely make sure the server has access through the firewall and that you properly forward the TCP port you decide to use. You may not have to forward, but I would as a general rule of thumb to make it one less thing to check when troubleshooting.
Good luck
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'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..