I created DB Instance (MySQL) with Publicly Accessible option. In DB Security group, I opened MySQL Port for EC2 instance security group(Web server). In EC2 security group it allows ssh, web server ports. I can able to connect DB Instance from EC2 instance. I deployed web app on web server and it can't able to connect with RDS Instance.
I am getting the exception in my local web server:
org.springframework.jdbc.CannotGetJdbcConnectionException: Could not
get JDBC Connection; nested exception is java.sql.SQLException: Server
connection failure during transaction. Due to underlying exception:
'java.net.UnknownHostException:
"kbawstry2.cdhtaamn5ynq.us-east-1.rds.amazonaws.com"'.
EC2 Security Group
DBInstance Security Group
Using MySQL WorkBench, I can connect to RDS DB Instance using TCP/IP SSH Tunnelling option. But in Java Programming How can I connect with database?
Thanks in advance.
Finally I solved the issue. The problem is in application the way I mentioned connection string. I rectified and tested application in localhost then updated to tomcat server in EC2 instance. Another change in DB Security Group. I replaced source ip as EC2 instance's private IP address as both RDS and EC2 Instance are in same VPC.
Now It is working fine.
Related
I have a AWS RDS MySQL instance running, on a private subnet.
I have another EC2 instance running on a public subnet, which functions as a bastion host for the MySQL instance.
They are both in the same VPC.
I can connect to said instance via the mySQL workbench by configuring a Standard TCP/IP over SSH connection. I provide the SSH Hostname as the EC2 public IPv4 DNS, SSH Key file and the MySQL hostname and credentials.
I can't quite figure out how to connect to this db through a local springboot application. Any explanations would be helpful.
As in what should be the JDBC URL, and how do I get the application to route via the bastion host?
I have hosted a play framework web application on Amazon EC2 instance. The application is not able to connect to a mysql database located on the Amazon RDS instance. When I run the play framework web application on my local computer it successfully connects to the database on the Amazon RDS instance. I checked the database connection credentials in the production conf file many times. Looks correct.
When I do
mysql -h********.rds.amazonaws.com -p****** -u****** db_name
from the local computer it quickly connects. But when I try same connection to RDS from EC2 it throws:
ERROR 2003 (HY000): Can't connect to MySQL server on ********.rds.amazonaws.com
Can anyone kindly help me with this or suggest anything that I may be possibly missing.
Is RDS in VPC?
Yes, Check if EC2 is also in VPC or not.
No, Check security group that EC2 is in, allows the communication over database port
For more info and scenarios, head here
I have a Ubuntu VM in an EC2 AWS instance, with MongoDB installed. I can successfully save information to this database on my local machine using a spring boot application. However, this remote connection can only be made when I have a connection to remote Mongodb open on my local machine. Otherwise, the connection is refused.
My end goal is to have a mobile application that can preform CURD operations to a remote MongoDB.
Any help regarding this issue is appreciated.
Thanks.
You shouldn't be trying to connect to a remote MongoDB from a mobile application because anyone will be able to tamper with the information you are storing in it.
Consider using a local database bundled along with your mobile application or connecting from your mobile application to your Spring boot app which can then talk to the MongoDB instance.
Please check some point.
1: Please check remote connection open in your Mongo instance
2: Ec2 Instance have public accessibility
3: Ec2 Instance mongo port enabled and remotely accessible.
Did you confirm that the bind_ip actually changed to 0.0.0.0/0, ::/0
I have 2 projects.
Spring Restful Webservice
AngularJS
Database is MySQL.
i am new to AWS, I want to host my application using AWS. So i want to deploy these projects on AWS.
When i create MySQL database on AWS, then what will be the DB_URL then i can use it on my java application.
When i deploy the WAR file on AWS, then what will be the URL then i can use it on my AngularJS application
Database: use RDS Mysql. After create, go detail of RDS instance you will get RDS Endpoint with this pattern: RDS_INSTANCE_NAME.XXXXXXXXXXX.ap-northeast-1.rds.amazonaws.com and default port 3306. You can access this RDS with that endpoint and user/pass as the local database (Import/export, Create schema,...)
About the web layer, you can create 2 EC2 instances: 1 for Web-service, 1 for AngrulaJS or create 1 EC2 instance and deploy both of them into that EC2 instance.
You need SSH key to access via ssh. Then install your web container into EC2 instances and deploy as local server
AngrulaJS web: There are many ways to public your app:
you can use Route53 to create A Record point to public IP of EC2 instance (Containt AngrularJS app)
Use Internet-facing ELB point to EC2 instance.
Use public IP that associated to EC2 instance.
I found a clearly architect design in this, you can reference it https://creately.com/diagram/example/h4gr4x8d4/3-Tier%20Architecture
When you deploy the application in EC2.
You have Public DNS (IPv4) value for Ec2 ec2-xx-xx-xx-xx.compute-1.amazonaws.com. You will use this endpoint for WAR file.
If you do not assign Elastic ip for the EC2 Instance when you stop and start instance the ip address changed for Instance.
Based on your requirements you can leverage other services like Load Balancer and Route53.
I am attempting to query a MySQL database from a java program on EC2. My database is stored on Amazon Web Services (AWS) RDS.
When I test my java program from my local tomcat server, I successfully query the RDS database. However, when I query my RDS database from my EC2 instance, I fail to connect.
In my attempts to solve this problem, I investigated my security settings. I've set up an RDS security group associated with my EC2 Security group that is associated with my instance. In my EC2 security group I've enabled all types of inbound traffic to all ports.
Other answers to similar questions suggest that setting up the RDS security groups to accept connections from the EC2 instance is the resolution to this problem. However, I have seemingly done this, yet cannot connect from my EC2 instance (but can from my local machine).
Am I overlooking something?
My guess would be, your EC2 instance is probably in different VPC , and you have made the RDS db instance private or you did not launch it in the specific vpc where your EC2 instance is located in.