I want to connect to MySQL with Airflow Connection, but I can’t.
Is there any missing information from the attached image?
I have already set up Airflow's VPC to connect to a remote database.
Also, when you press the Test button, a red frame like an error window is displayed at the top of the screen, but no wording is written.
This phenomenon occurs when something is entered in "Host".
If the input of "Host" is empty, the error (2002, "Can't connect to local MySQL server through socket'/var/run/mysqld/mysqld.sock' (2)") is output.
Is this a bug?
Each version is below.
Composer
1.18.1
Airflow
2.2.3
MySQL to connect to
10.2.25-MariaDB-log
Related
I am trying to run this command locuscompare(in_fn1 = gwas_fn, in_fn2 = eqtl_fn, title1 = 'CAD GWAS', title2 = 'Coronary Artery eQTL') within R in ubuntu behind a corporate proxy
but having the following persistent issue for three days.
Error in .local(drv, ...) :
Failed to connect to database: Error: Can't connect to MySQL server on 'locuscompare-us-west-2a.xxxxxx.us-west-2.rds.amazonaws.com' (111)
Warning message:
In rm(config) : object 'config' not found
I have already tried the solutions mentioned in stack overflow, such as installing MySQL, assigning users' privilege, editing bind-address in configuration file, but still do not know how to run it smoothly.
I thought at first it was an issue related to the lacking of MySQL server and AWS account on my device. But, when I use it on my mac with home Wi-Fi, it is working like a charm without any installation and creation of MySQL server and AWS account. However, I still need to use this tool on my work PC because of input data privacy issue.
Does it mean I need to create an AWS account and adjust the network setting in it to access MySQL server on this URL 'locuscompare-us-west-2a.xxxxx.us-west-2.rds.amazonaws.com'? (Sorry that I am very new to AWS and MySQL.)
Please let me know how to run this tool behind a corporate proxy.
I want to be able to connect to and work with a MySQL database that I have on DigitalOcean via PyCharm's database interface (instead of MySQL Workbench, which is what I'm currently using), but when I try to use PyCharm's interface to connect, I get the following error when I click 'Test Connection':
Packet for query is too large (###### > ######). You can change this value on the server by setting the max_allowed_packet' variable.
I'm connecting to DigitalOcean via SSH, and PyCharm is saying that my SSH connection is OK (it's working).
The issue ended up being that I was putting the wrong IP address and port into PyCharm's prompt: I was putting the IP address to my DigitalOcean VM instead of the local IP address of the MySQL db.
Here's a screenshot of the PyCharm settings that ended up working (remember, I was connecting via SSH):
Here's a screenshot of my (working) MySQL Workbench settings, showing which settings I should have copied over to PyCharm:
Problem
I launched a MySQL RDS instance and was able to successfully connect to it using MySQL Workbench. However, I am still not able to connect to it from my local workstation using the following URI:
'mysql+pymysql://user:password#db_identifier.XXXXXXXXXX.us-east-1.rds.amazonaws.com:3306/db_name'
or the same URI without the port:
'mysql+pymysql://user:password#db_identifier.XXXXXXXXXX.us-east-1.rds.amazonaws.com/db_name'
The error that I receive when I specify this as my database URI and execute a db.create_all() command is:
sqlalchemy.exc.OperationalError:
(pymysql.err.OperationalError)
(2003, "Can't connect to MySQL server on 'db_identifier.XXXXXXXXXX.us-east-1.rds.amazonaws.com'
([WinError 10060] A connection attempt failed because the connected party did not
properly respond after a period of time, or established connection failed because
connected host has failed to respond)")
Question
What can I do to connect using pymysql? And why would it connect with MySQL Workbench and not through this URI?
Context
I am following the tutorial here. This uses SQLAlchemy to execute the SQL statements in Python.
The RDS instance (and its associated subnet/VPC) have the following:
a security group open on port 3306
NACL rules that allow incoming and outgoing traffic
Public Accessibility set to "Yes"
Check my answer on this post, it could be something about the "Public accesibility" option in your rds "Connectivity and Security" section as described here;
https://stackoverflow.com/a/63514997/2934184
First of all I apologize for my English is not perfect.
I'm trying to connect to mysql database remotely.
I have already done the basic steps such as, for example, comment the bind address in my.cnf.
I gave permissions to the appropriate users in MySQL.
I tried with my friend to do it connect to the database, and it worked but we were in the same room with the same router.
Now I'm home and I tried to connect my friend, but I always get error:
ERROR 2003 (HY000): Can not connect to MySQL server ....
Maybe it's a problem of my home router? I can not even do the telnet.
P.S. I've also taken steps to set the firewall.
Some reasons for that,
mysqld is not running on the local host. Check your operating
system's process list to ensure the mysqld process is present.
You're running a MySQL server on Windows with many TCP/IP connections
to it. If you're experiencing that quite often your clients get that
error, you can find a workaround here: Section B.5.2.2.1, “Connection
to MySQL Server Failing on Windows”.
Check whether the server is running on that host by executing telnet
some_host 3306 and pressing the Enter key a couple of times. (3306 is
the default MySQL port number. Change the value if your server is
listening to a different port.) If there is a MySQL server running
and listening to the port, you should get a response that includes
the server's version number. If you get an error such as telnet:
Unable to connect to remote host: Connection refused, then there is
no server running on the given port.
Look at this mySQL full documentation, it will be helpful.
When I first set up MySQL Server in Netbeans everything worked well. Now one day I think I accidentally clicked something or my computer lost battery life when I was connected to MySQL Server, and after these event(s) I have not been able to connect to MySQL Server. I do not know for sure if either of the above events would have any effect on connecting to a MySQL Server database.
Anyway since these events I have found that I cannot "start" or "connect" to a MySQL Server databse. I am doing this all through Netbeans IDE.
Here is a picture of how I try to connect to my databaseL:
This is what the error message says after I click connect:
Unable to connect. Cannot establish a connection to jdbc:mysql://localhost:3306/twitterdata using com.mysql.jdbc.Driver(Unknown database 'twitterdata'). The name of the database I am trying to connect to is twitterdata
How can I get reconnected to the MySQL Server database "twitterdata"?
I am not familiar with MySQL, databases, servers and I have no idea how to get reconnected. If there is any other helpful information that I should provide let me know.
What MySQL tools can I run to find my problem?
Why would the error message tell me that the database is unknown?
If I got to C:\ProgramData\MySQL\MySQL Server 5.5\data. There is a folder named twitterdata.
Here are the contents of that directory:
Please let me know if you need more information or if you have other suggestions that would help!
Thanks for all the help!
If you are using windows system and facing the error 'unable to connect localhost 3306' at the connection time. First you have to need start MySQL services in 2 steps:
Press "Windows key + R" write "services.msc"
And run as admin start MySQL service.
There can be three issues:
1) Either your server isn't even running. Open your command prompt and enter mysql
2)Let's say it is , can you check if it's connecting on the correct port.
Like in the url, you are using 3306,
Try following this post:
How do I find out my MySQL URL, host, port and username?
3) Can you check what if there are any credentials to the database you are connecting?
https://netbeans.org/kb/docs/ide/install-and-configure-mysql-server.html