I've tried this a couple of times without any luck. I've got a new EC2 instance (Amazon Linux 2 AMI (HVM), SSD Volume Type - ami-0a0ad6b70e61be944). This instance is in the default VPC and region = US EAST 2 (Ohio). The EC2 is in a web-server security group that has inbound ports 80 & 22 open. The RDS is a MySQL instance "Dev/Test" and is in a security group that has has inbound port 3306 open for "my ip" and my web-server security group is added to this DB security group. I can SSH into my web-server without issues. I can launch my test page on my web-server without issues. Yes, I'm using the correct connection string details including credentials.
However, the WordPress client on my EC2 fails to connect to my RDS with the following error:
Error establishing a database connection
This either means that the username and password information in your wp-config.php file is incorrect or we can’t contact the database server at uday.cgakf6jnokhj.us-east-2.rds.amazonaws.com. This could mean your host’s database server is down.
Are you sure you have the correct username and password?
Are you sure that you have typed the correct hostname?
Are you sure that the database server is running?
Any help would be appreciated
I've tried suggestions like directly adding the public and/or private IP of the EC2 into the Security Group of the RDS - no luck :-(
The tutorial in udemy had wrong instructions. This particular paper in AWS helped me overcome underlying issues - everything now works beautifully!! https://aws.amazon.com/getting-started/hands-on/deploy-wordpress-with-amazon-rds/5/
Thanks!
Related
I'm trying to run Wordpress on my Ec2 instance with RDS MySQL database.
Here's the tutorial I've followed https://cristianocastro.net/instalando-wordpress-em-um-servidor-amazon-aws-pt-2-3/
But when I try to access the Ec2 instance that connect to the RDS on the browser it shows this message
Error establishing a database connection
I put in the security group inbound and outbound all traffic anywhere.
Here's the print from my security group rule.
Appreciate the help
PS: Saw this question, with no anwser Can't Connect to RDS mysql DB from Wordpress on Amazon linux EC2 Instance
Edit: Rules from security group of the ec2 instance that will access RDS.
Based on the info you provided it seems your RDS is publicly accessible via the internet and connections are going to be accepted from any host (you might want to restrict these later)
Assuming that your software setup (OS, php, MySQL libraries, Wordpress) is okay and you’re using the right parameters in the WP configuration (host, port, user, password, db).
One of the remaining issues might be that the Security Group attached to your EC2 instance doesn’t allow connectivity on port 3306 (MySQL) towards the IP Address of your RDS instance.
It appears that you have:
An Amazon EC2 instance
An Amazon RDS instance
The typical security configuration would be:
The Amazon RDS database configured as Publicly Accessible = No
A Security Group (EC2-SG) on the Amazon EC2 instance that permits inbound traffic from your desired locations (eg port 22 for SSH), and default Outbound rules permitting all traffic outbound
A Security Group (RDS-SG) on the Amazon RDS database instance that permits inbound traffic on port 3306 from EC2-SG
That is, RDS-SG should specifically reference EC2-SG to permit the inbound connection.
The app running on the EC2 instance should reference the RDS database via the DNS Name shown in the RDS console.
I created an AWS server and installed wordpress with an elastic ip address and verified that the default website was up and running.
I wanted to make a backup image at that point so that I could use it as a beginning point for other websites. However, after getting the AMI running and attaching the elastic ip address to it, I got an "connection refused" error. I can both SSH and FTP into the server, but the wordpress site is offline. I then switched the elastic ip back to the original server and got the exact same issue.
I'm guessing that this is a "change of ip" type error(?) (although, when I've seen that before, the connection has never been outright refused... it usually allows at least access to the admin area of the website) but I thought by using an elastic ip address that I would avoid that. I'm also confused by the error in the first server, since the database still has that address.
Any ideas about how to troubleshoot something like that? Is there anything else that it could be?
Well.... I missed something vital.
Using an AMI works just fine with an elastic ip address. I had forgotten to make sure the webserver (httpd) and mysqld were running with :
service httpd restart
and
service mysqld restart
What made it click was reading that the main reason for this error is that there is listener to the incoming data.
Duh.
I am some issue with connecting the pipes between MySQL Workbench and my Bitnami Wordpress instance on AWS (using ssh). I have read and attempted the docs several times, I don't know what is going on.
I have successfully ssh-ed via the command line using ssh -i my_key_file bitnami#IP-Address.
However, I cannot get it to work for MySQL Workbench.
Field Value
SSH Hostname IP-Address
SSH Username bitnami
SSH Key File <path-to-key-file>
MySQL Hostname 127.0.0.1
MySQL Server Port 3306
MySQL username root
The path to key-file is correct as it works for other AWS instances. And the SSH hostname and SSH username get my access via the terminal - so I would assume these are fine?
When I test the connection, I am prompted for a password. Everywhere online suggests that this password is the admin password used the Wordpress account (accessible via the system logs). I have this password. However, this doesn't get me in.
The attempted connection returns the error: Failed to Connect to MySQL at 127.0.0.1:3306 through SSH tunnel at bitnami#IP-Address with user root
Any help would be appreciated
I have read and attempted the docs several times, I don't know what is going on.
I guess you are referring to this documentation
Could you try to reset the password for the root user as described in the guide below?
https://docs.bitnami.com/aws/components/mysql/#how-to-reset-the-mysql-root-password
Once you have restarted it and you have chosen a new one, use this new password on the Workbench.
I am using SQL managment studio 2008 running on an Amazon EC2 machine. I am unable to connect to the database in my asp.net application. The EC2 instance has been set to accept connections over the SQL port. I am also able to remote the machine as well as view websites hosted on the server. Listed below is part of the connection string relating to this instance. When the program is ran and this connection string is called, it returns tcp error 0 - no return response. it just times out.
<add name="ProjectServer" connectionString="Data Source=*IP ADDRESS HERE*,1433;Initial Catalog=*Catalog Name*;User ID=IP-0A6ED514\Administrator;"/>
I removed the ip and the catalog name for the example, but I am sure they are correct.
The only thing that I could think may cause an error, is the differences in names between the user id and the server name - the server name is ip-0A6ED514\sharepoint but the user name is ip-0A6ED514\administrator when I log into the sql server manager on the EC2 instance. A password is not used. Not sure if I would need to leave in a blank string for password - also not sure if the difference between server name and user id to log in makes a difference. Any help is appreciated. Thank you.
update - when this connection string is used with out the port, i get tcp provider error 40 - when the port is in there, i get error 0
edit- the sql server is using windows authentication - does this make a difference? Usually I always use SQL server authentication
edit 2- now running sql express at same location, would i need a \SQLEXPRESS tag? I feel like after looking around and what could be the error, it is that I am reaching the machine ok, but its not pointing me to the DB, any suggestions?
I have problems connecting to my database server. The database server is not local, I am connected via its IP address.
It works fine in my development machine. After publishing the website to my server, it can not connect to my database server.
A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server)
Why can't my publish server connect to the database server, whereas it works fine through the development machine?
I often had that problem. Mostly it's because of two problems.
Open the SQL Server Configuration Manager.
Check if the SQL Server Network Configuration supports TCP/IP, if it's disabled, enable it.
e.g. SqlServer 2005 Network Configuration, Protocols for SQLEXPRESS
Open the SQL Server Management Studio
Click on the Sql Server Properties (right click on the server name and
select properties).
After that, select the page "Security" and switch the check to "SQL Server and Windows Authentication mode".
That's all.
I'll attempt to go two for two on the psychic debugging for today...
I will assume that you are not using integrated security? If so it might explain things as the account on your local machine probably has permissions, but the SYSTEM account that is running on the server does not. Just a shot in the dark though.
It sounds like your server can't make the network connection, rather than a security issue.
Ensure that any firewalls on both the DB and app servers allow traffic on the port (1433).
Ensure you're able to ping or tracert from both machines.
Is it your first time you publish your website on the web server ? if it is , Are you sure you have set your connection string properly ?
You need to create a login ( of curse a password for that too ) and the IP Address of that SQL on the web server .
So you need IP Address of the sql server host , Database Name , UId , Pwd .
I will agree that this sounds like a network issue and not a security issue.
Remote into the web server and ping the DB server by IP address. If this does not work, your server cannot see the DB server via that address (different subnet, incorrect firewall/proxy setup, etc). There may be a proxy address you must use to get to the DB server from the web server, or your web server may also be the gateway and IIS doesn't know to look for the DB server on the LAN. If it does work, the computers may not be talking on the same port, or the firewall may be blocking that port exiting the web server.
I have spent hours trying to connect to SQL server using sqlcmd. I disabled my firewall, checked all ip listed in "Protocols for SQLEXPRESS", edited my hosts file. I tried using different ips and machinename to connect to the server. But none of work worked. After hours of investigation, I found out that I made absolutely stupid blunder making me unable to connect.
I want to remind people that the connection string is not case sensitive. But the option is!!
what i did is I put
sqlcmd -s .\sqlserver
But the correct string is
sqlcmd -S .\sqlserver
so watch out, people