I'm exploring AWS RDS for the first time.
I have two MySQL instances. The first is the traditional MySQL RDS and the second is an Aurora MySQL instance.
Both RDSs have the same region, VPC, and security groups.
I can successfully connect to the traditional MySQL RDS from MySQL workbench on my localhost (Mac OS Monterey FWIW)
I cannot connect to the Aurora Instance. When I attempt to do this I get message "Unable to connect to localhost"
Clearly the hostname I'm using is not localhost (see attached). I've tried connecting from other SQL clients without any success. For example, from a windows box using ODBC I get "unable to connect to " without any other explanation.
Related
I'm trying to create a subscription.
It works well when I create it on a PostgreSQL instance or cluster (to PostgreSQL).
But when I try to do logical replication from PostgreSQL to AWS Aurora PostgreSQL I see the following error:
ERROR: could not connect to the publisher: could not connect to server: No route to host
Is the server running on host "my-db.dfsfdsfsdfd.us-east-1.rds.amazonaws.com" (10.2.5.7) and accepting
TCP/IP connections on port 5432?
Some notes:
I updated the parameter group to enable replication: rds.logical_replication (from 0 to 1)
The RDS policy has enough permissions.
Both DBs are in the same VPC, same subnets and share the security group
I can connect to both DBs, and as I said, subscription works if instead of using Aurora I use PostgreSQL
Any idea why this could be happening?
Thanks!
I am trying to create a linked server between the warehouse and a amazon cloud service.
The service provide is using a PostgreSQL database.
I have installed the ODBC Driver (12.10) on my server but I keep getting this error.
I am not sure how to work around this as I have never used Postgres before.
I´d like to know if it is possible to connect to my rds database from my local machine (windows) using windows odbc data source. My problem is that I use SSH and i don´t know how can I input the parameters in odbc data source. I need this type of connection because I want to access RDS via vba excel. My database is Postgresql.
If you have a publicly accessible database (not recommended by AWS) and your IP address is allowed, then the normal ODBC connection will work.
By the sound of your setup, you have a private database. In which case, your options are:
Use a different ODBC driver that supports tunnelling.
Devart (https://www.devart.com/odbc/postgresql/) and Cdata (https://cdn.cdata.com/help/FPG/odbc/RSBPostgresql_c_SSH.htm) both have ODBC drivers that support SSH tunnelling.
Neither are free.
Use a VPN and point your driver at localhost
I am planning to have a timescale database running in an EC2 or Lightsail instance. I would like to be able to connect to and run queries on this timescale database from a Lambda function to insert data into and read data from the DB.
I know timescaleDB is a Postgres plugin and there are plenty of articles online documenting the process of connecting to a Postgres DB running inside of AWS RDS from a lambda, but I can't seem to find any describing how I would connect to one running in an EC2 or Lightsail instance.
Question: How do I connect to a timescaleDB running in an EC2 or Lightsail instance from a lambda function?
I'd say the answer is the same as for how to connect to RDS, as documented here:
https://docs.aws.amazon.com/lambda/latest/dg/vpc-rds.html
This answer also gives a good example how to connect to a PostgreSQL RDS, but instead of using the rds_config, you'll need to specify the hostname/ip in such a way that they point to your EC2 instance.
The differences being that you will need to specify the hostname/ip and other connection details to point to the EC2 instance. For example, if your EC2 instances
import sys, logging, psycopg2
host = "ec2-3-14-229-184.us-east-2.compute.amazonaws.com"
name = "demo_user"
password = "p#assword"
db_name = "demo"
try:
conn = psycopg2.connect(host=host,
database=db_name,
user=name,
password=password)
cur = conn.cursor()
except:
logger.error("ERROR: Unexpected error: Could not connect to Postgresql instance.")
sys.exit()
Have created a follower database for a Heroku Postgres DB. I am able to connect to the follower DB by using pgAdmin, no problem.
When I try to connect with Tableau 8.2 Postgres connector using the same credentials, I get "no pg_hba.conf entry for host xxx.xxx.xxx.xxx, user yyyyyyyy, database zzzzzzzz, SSL Off".
As an alternative I tried the Amazon Redshift connector with the same credentials and it works, except for full drill through to underlying data errors out ("Syntax error at or near 7500") or some other line number.
Does anyone know a way to connect to Heroku Follower database with Tableau 8.2 that enables drill through (view underlying data)?
Have you been able to get the Postgres connector to work?
Is there a way to get the Amazon Redshift (or other) connector to work with drill through capabilities?