I'm writing a small python program locally as i don't have root access on the server. It basically does a lot of mysql queries using python MySQLdb module.
The thing is I cant use MySQLdb with the server, as the mysql server is hosted locally and I need to ssh into the server and then use mysql from there.
Is there any module available where I can connect to a mysql database via SSH.
At the moment I can connect to the mysql instance using SSH credentials (IP, User, Pass)
I also have the user/pass for the mysql instance and I'm pretty sure it runs on 127.0.0.1/localhost.
If you're set on Python, I would use paramiko:
https://github.com/paramiko/paramiko
This seems to be one of the most widely used Python SSH libraries. There are some other StackOverflow questions that address how to do this.
How to open an SSH tunnel using python?
SSH Tunnel for Python MySQLdb connection
The main idea is to create a tunnel with paramiko and then connect to the localhost port through which you are tunneling traffic to the remote server using the Python library MySQLdb.
Related
I can read from my local psql instance like this:
engine = create_engine('postgresql://postgres:postgres#localhost/db_name')
df = pd.read_sql("select * from table_name;", engine)
I have a remote postgresql sever which I successfully accessed with ssh tunneling both in PgAdmin4 and pycharm. I use public key file to login into remote server. Now, my question is how do I access that database with pandas. I tried:
engine = create_engine('postgresql://username:password#localhost/db_name')
Here, username and password are of remote database. I get sqlalchemy.exc.OperationalError: (psycopg2.OperationalError) FATAL: password authentication failed for user. However, with the same username and password I can access the table in PgAdmin.
From what I read, because of ssh tunneling I have to use localhost and not the remote server address, right? In pgAdmin I can see that the server is running. So, my question is how do I read the table from remote postgresql database with ssh tunneling? In examples I have seen people using different port (different than 5432) but for me the setup only works if I use port 5432. I have disconnected all other servers to avoid the port conflict but I get the same error.
The tunnel created by pgAdmin4 is intended for its own use. It does not arrange for it to listen on 5432, it picks some arbitrary high numbered port and doesn't advertise what port that is. While you can discover what port it is listening on using system tools (like netstat) and then connect to it, you would probably be better served by finding some other way to set up your tunnel. There are python libraries that can help with that.
As for why you can connect to 5432 at all, clearly there is something listening there which is either PostgreSQL or pretending to be PostgreSQL, but it doesn't seem to be the one you intend. You can use netstat -ao to find the pid for it and then look up based on that.
I wish to connect to a database server through my local machine at work, but I do not have direct access to the database server (due to security reasons). The database server is accessible through another intermediary server which I can connect to.
I understand I can connect to the database if I run my script on the intermediary server, but is there any way through which I can connect to the database server directly through my local machine?
I am trying to do this in a Python script as I wish to read the data into a pandas dataframe (I can do this part once I can set up the connection).
If you have SSH access to that intermediary server you can connect via an SSH tunnel. This post describes how to do that: Enable Python to Connect to MySQL via SSH Tunnelling
I am trying to connect to remote machine by python script. Both the machines can be linux/windows.
I have to connect to various remote machines and it's not feasible for me to install or write some code on the remote side. I know the ip, username and password of the machine and i tried various options but was unsuccessful.
How shall I proceed.
Maybe you can use SSH to connect to a remote server.
paramiko will be good idea, it can use to connect linux/windows.
http://pxnet2768.pixnet.net/blog/post/157228756-%E7%B3%BB%E7%B5%B1%E9%81%8B%E7%B6%AD%E5%B7%A5%E7%A8%8B%E5%B8%AB%E7%9A%84%E6%B3%95%E5%AF%B6%EF%BC%9Apython-paramiko
I am not a network/web/internet programmer so please excuse my noobness in this area. I have gotten a website using a free hosting service. They include one MySQL database. Here are the details for the database:
port = 3306
host = "fdb4.biz.nf"
database = "1284899_6067"
user = "1284899_6067"
password = "somepass9351"
I am using MySQLdb module (installed on my CLIENT machine - not server) to connect to this database:
db = MySQLdb.connect(host=host, user=user, passwd=password, db=database,port=port)
But I get the following error:
OperationalError: (2003, "Can't connect to MySQL server on 'fdb4.biz.nf' (10060)
What I have already tried
tried two different databases from different hosts
tried changing the port
tried searching SO for similar answers but all others connect to 'local host'
What I think:
could this be caused by my firewall? I am using my school's internet. I don't think this could be it because I am on CLIENT so if anything it is the SERVER'S firewall.
Two questions
Can MySQLdb be used to connect to a db on a SERVER when it is imported on a CLIENT?
If yes, what am I doing wrong?
Thank you so much for any help, its greatly appreciated! Been stuck the whole day on this.
For security reasons, mysql only listens for connections from localhost. Error code 10060 is basically that: you are not allowed to connect remotely.
Solution: find a my.ini (or my.cnf in linux) and try to find a line:
bind-address = 127.0.0.1
this line says: allow only local connections. So, you should comment-out this line, or set your IP address.
Yes, MySQLdb can connect to remote hosts.
And your usage of the connect method is correct.
You should first check if you can connect to the remote mysql server from your mysql client.
In terminal you can type mysql -h hostname -u username -p databasename
This should prompt you for the password. Enter the password. Can you connect?
If you can't connect, then you have an access problem, and its not a python - mysqldb problem
Either the server is not reachable because it is behind a firewall, in that case your client machine's ip needs to be whitelisted. Check your firewall settings
Or, the mysql server running on the remote machine is configured to accept only local connections. I think this is the default, but I'm not sure. You should ssh into the server remote host where the database server is running, locate the my.cnf file on the server and check the settings. Depending on your mysql version, the configuration would look slightly different.
Or, the user that you're trying to connect as is not associated with the ip that you're trying to connect from. Mysql users have two parts, like this: 'username'#'host'. To enable a user to connect from all ips the user needs to look like this 'user'#'%'.
I hope I've given you enough to try to debug this issue.
Note:**I am connecting using Python2.7 in a virtualenv to access MySQL on XAMPP, which was not installed on the virtualenv.
I am trying to connect with MySQL via python. I recently downloaded MySQL connect from Oracle. I also downloaded the ODBC driver from the same site. When I plug in the information below, I get a 2003 error telling me that it cannot connect:
mysql.connector.errors.InterfaceError: 2003: Can't connect to MySQL server on '127.0.0.1'
but when I include the port number in my connection, it freezes up and nothing happens.
This is my code:
>>>import mysql.connector
>>>cnx = mysql.connector.connect(user='[my username]',password='[my password]',host='127.0.0.1', database='FXPrices',port=80)
After that, the cursor indents--so there are no arrows for the python prompt. I have to hit control-z every time I want it to stop. Do I need mod_wsgi to fix this?
You're trying to connect to the http port (port 80) on your machine.
MySQL by default listens to port 3306, you shoud try that (it's the same if you omit the port argument), or try to find out on which port your mysql server is really listening.