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
Related
I am using the following DBD::mysql statement to connect to a MySQL database:
use DBI;
# Connect to the database.
my $dbh = DBI->connect("DBI:mysql:database=test;host=localhost",
"usr", "usr's password",
{'RaiseError' => 1});
Is there a way to check if MySQL service is running, before trying to connect to the database? What if the database is running on a remote server?
If you want a solution to check if the service is running without attempting to connect to it, you could use some Perl package to check the process table (works locally only), or check that the MySQL port (3306 by default) has a process listening to it.
I'm not sure what the purpose of this check is, because even if the service is running, the next thing you'll probably want to do is open a DB connection. Opening a DB connection is a quick and easy thing to do, and it has good error reporting if it doesn't work. So your intention to check that the service is running first is just unnecessary overhead.
I would just try to connect as you are doing. This is the most direct way of checking that the service is running, and it works both locally and remotely.
If there's an error, catch the error and interpret the error message. It'll be error 2002 (for localhost) or 2003 (for TCP/IP, whether it's the same host or a remote host).
These errors are mostly reliable. But there could be red herrings, for example if the service is running on a remote host, but your client host can't reach it because of firewalls or routing issues.
If you get an error 1045 (Access Denied), at least you know the service is running and you can reach it, the problem is only that your user & password are incorrect, or you tried to access a schema you don't have privilege to use.
We have create private cloud instance but I am unable to connect to it using MYSQL workbench, php or a ODBC client.
From the same compute instance I can connect using mysql -h IP -u user -p *****. With GCP services I usually find gotcha in some document and I have tried digging everything possible. Here below error from a ODBC client:
BIP2393E: Database error: ODBC return code '-1' from data source ''DEVA'' using ODBC driver manager ''/opt/iib-10.0.0.20/ie02/lib/libodbcinterface.so''.
The integration node received an error when processing a database operation. The ODBC return code was '-1'. See the following messages for information obtained from the database about this error.
Use the following messages to determine the cause of the error. Typical problems are an incorrect data source, or table names. Correct either the database or the integration node configuration. Use the mqsicvp command to test connectivity to this database.
BIP2322E: Database error: SQL State ''HY000''; Native Error Code '2003'; Error Text ''[unixODBC][MySQL][ODBC 5.3(a) Driver]Can't connect to MySQL server on '1x.1x.1x.1x' (110)''.
The error has the following diagnostic information: SQL State ''HY000'' SQL Native Error Code '2003' SQL Error Text ''[unixODBC][MySQL][ODBC 5.3(a) Driver]Can't connect to MySQL server on 'x.x.x.x' (110)''
This message may be accompanied by other messages describing the effect on the integration node itself. Use the reason identified in this message with the accompanying messages to determine the cause of the error. Use the mqsicvp command to test connectivity to this database.
If I try and use a local proxy I get below:
BIP8299I: User 'user' from security resource name 'BIGDEVA' will be used for the connection to datasource 'DEVA'.
BIP8290I: Verification passed for the ODBC environment.
2020/07/16 20:29:41 New connection for "sql-instance"
2020/07/16 20:31:49 couldn't connect to "sql-instance": dial tcp x.x.x.x:3307: connect: connection timed out
BIP2393E: Database error: ODBC return code '-1' from data source ''DEVA'' using ODBC driver manager ''/opt/iib-10.0.0.20/ie02/lib/libodbcinterface.so''.
The integration node received an error when processing a database operation. The ODBC return code was '-1'. See the following messages for information obtained from the database about this error.
Use the following messages to determine the cause of the error. Typical problems are an incorrect data source, or table names. Correct either the database or the integration node configuration. Use the mqsicvp command to test connectivity to this database.
BIP2322E: Database error: SQL State ''08S01''; Native Error Code '2013'; Error Text ''[unixODBC][MySQL][ODBC 5.3(a) Driver]Lost connection to MySQL server at 'reading initial communication packet', system error: 0''.
The error has the following diagnostic information: SQL State ''08S01'' SQL Native Error Code '2013' SQL Error Text ''[unixODBC][MySQL][ODBC 5.3(a) Driver]Lost connection to MySQL server at 'reading initial communication packet', system error: 0''
This message may be accompanied by other messages describing the effect on the integration node itself. Use the reason identified in this message with the accompanying messages to determine the cause of the error. Use the mqsicvp command to test connectivity to this database.
Private cloud instance I meant that the network it sits in has no internet access, I guess it was not needed. Subnet A holds the client VM and Subnet B holds the DB instance and they have SA account based firewall rules. Though we found the issue as the firewall was open on service accounts on the VM so using a mysql client was working but apparently GKE POD subnet need it's own firewall rules and it doesn't inherit VM SA account/tag rules whereas a standalone docker container on it's own does.
I am trying to connect to cloud sql hosted in gcp from eclipse, not able to do so. I have whitelisted my ip using the connection settings on cloud sql instance. I have added the driver also in eclipse for mysql.
I think I am making mistake in constructing the connection string. Please refer below details.
connectionName: abc-dev:europe-west1:abc-instance
So in connection section
database: abc-dev:europe-west1:abc-instance
url: jdbc:mysql://35.233.100.100:3306/abcInsoles
user: root
password: xyz123
It throws exception:
com.mysql.cj.jdbc.exceptions.CommunicationsException: Communications link failure
I am running it from local.
Can you throw some insights?
Many thanks.
The "database" value is incorrect - this is the name of the database on the instance itself (not the instance's connection string).
Since you are using Java, you may be interested in the Cloud SQL JDBC Socket Factory - it allows you to connect to the Cloud SQL instance without whitelisting an IP.
I am having trouble making the initial connection to my freshly created cloud sql instance.
I followed the steps outlined here: https://developers.google.com/cloud-sql/, which includes getting an IP, whitelisting my IP, and setting a root password.
However, when I try to connect using the mySQL command line tool, I get this error message:
mysql --host=xxx.xxx.xx.xxx --user=root --password
ERROR 2003 (HY000): Can't connect to MySQL server on 'xxx.xxx.xx.xxx' (10060)
I have a feeling that struggling at such a basic step implies my issue is specific only to me (calling for google cloud sql support folks).
I had the same issue, after a few minutes I got it going..
Make your GCE service has cloud SQL enabled (during instantiation)
Have a static ip for your GCE instance (you can use cloud console even while instance is running), and configure cloud SQL to accept this ip
set a root password for the cloud SQL
then your command is
mysql --host= --user=root --password=
My issue turned out to be related to the ISP (comcast) blocking outbound requests on port 3306. After setting up port forwarding, I'm able to connect directly from my pc to cloud sql WITHOUT using a GCE instance.
If others encounter this issue, I would recommend checking whether the port 3306 is available first (firebind, portquiz, etc).
I am working on windows and having a remote desktop connection of another machine. I am trying to connect to the mysql running on the remote machine through my MySql workbench, installed on my machine.
When I specify the details to connect to mysql i.e.
IP- a.b.c.d
port-3306
username=root
password=
But everytime it shows me an error saying-
Your connection attempt to connect to user='root'failed from your host to server at a.b.c.d:3306
Is it possible that I can connect to mysql on a different machine?
Certainly that is possible, mysql is a network transparent service. However obviously the normal access authorization rules apply.
do you have network access to the mysql port, this might be blocked by a firewall. You can check that by using telnet ip-address-of-server 3306. Does the server answer or do you get a timeout or are blocked? (the answer would look cryptic, soomething like 5.5.33-MariaDB[*[n7p~g!�iXccI$r9``Y{$mysql_native_password or similar )
the mysql server can be configured to not listen to remote connections. This can add security to the setup, but would obviously block any remote connection attempts. You will have to check the configuration files of mysql for that.
mysql itself implements an authorization level. So check if that 'root' user actually is allowed to connect from the outside. Those authorizations are stored in the internal "mysql" database.
Also it is not clear from the question what your network topology is: is the mysql server running on that system you have a "remote connection" to? Is the mysql-workbench running on that remote system or on your local system? This might affect the ip address you have to use inside the workbench.