I deployed my Rails app to Amazon EC2 server (Ubuntu), but I am thinking how to connect to MySQL database from terminal (SSL) and manually check data in database.
How to do that? I see in the database.yml file some credentials, but don't know how to connect/log in into MySQL on EC2 instance.
Thanks
There's no special magic involved here. An EC2 server is just... a server. This is not hosting like heroku or godaddy where your database is going to be hosted on a different db server.
Unless you explicitly setup a separate db server (which I don't think you did), you've got an entire virtual machine running Ubuntu, and the db server is most likely running on the same machine.
So you can ssh into the machine and just run the standard mysql client. Docs here: http://dev.mysql.com/doc/refman/5.6/en/mysql.html.
If you want to use some gui software such as sequel pro mentioned in one of the comments, you'll need to open up the ports in the aws console. Amazon closes all the ports by default. Do this to open up the port:
Open up the AWS control panel
Go to 'Security Groups'
Select the security group in the panel (you probably only have one).
Click the 'Inbound' tab.
Select Mysql from the dropdown list
Save the rule
This will open up port 3306 and enable you to use an external tool to see the server.
If you just want to call some sql to the database just to verify small amount of data, you can try doing these:
sql_statement = 'SELECT * FROM users'
ActiveRecord::Base.connection.execute(sql_statement).to_a
Related
I cannot reach my MySQL Database instance I created on AWS.
What I tried was to set the public access of the Database to "Publicly accessible" here:
Also I tried to set Inbound/Outbound rules for the MySQL port here:
Honestly I think using "All" ports would include 3306 too. Anyways, I tried it this way because yet it didn't work. I cannot connect to the database via MySQL Workbench, nor can I use a ping request on the given endpoint.
I would be glad if someone here has an idea what I could try else.
This will not work if you have deployed it in a private subnet which has no internet access.
Another possibility is that there is ACLs that is stopping the traffic. Security group only touch the RDS instance, the ACLs control traffic in the entire subnet.
Here is a dev AWS tutorial that creates a web application that stores data in MySQL running on the cloud. It will show you how to setup the database and the inbound rules. Once you do, you can store data or query data from MySQL. Likewise, you can use MySQL Workbench to interact with MySQL on the cloud.
AWS RDS Tutorial
any ide how to connect to my local mysql wamp server from another computer? Not in lan. For e.g. connect to 81.182.127.107, or see the phpmyadmin using 81.182.127.107phpmyadmin?
There are two ways to connect to a mysql server:
direct connection, eg. via database software or from your source code
via a local installed user interface, usually phpmyadmin which is a local hosted website.
mysql is bound to the local addresses by default. To change open the my.conf, and comment the bind-address: 127.0.0.1 like this:
#bind-address: 127.0.0.1
This will allow direct access to the mysql server from outside.
If you want to use phpmyadmin, you also need a webserver, which is apache by default at WAMP. There in the root web dir, phpmyadmin should be already installed, if not you need to install and configure it.
After this, http://ip-from-pc/phpmyadmin should bring you the user interface to your local mysql server.
I am working on a school project in which I have to upload data onto a database hosted on phpMyAdmin.
What's confusing me right now is that I see "localhost" at the top of the page and before I even query the database I see "Run SQL query/queries on server "localhost":"
Does this mean that I'm hosting a server on my computer and accessing the database through that? Because then I query for "SHOW VARIABLES WHERE Variable_name = 'hostname';" and it returns with hostname = webhost330. (It is hosted on webhost330.asu.edu).
I'm extremely confused about what this means. Thanks for any possible help.
I'm very new to databases so forgive me if I'm missing something simple here.
EDIT: To clarify: I'm not at school, I'm at my house. What kind of implications does this have? In other words, what's the difference between this and hosting a database locally?
When I host a database on my computer through the MySQL command line client, I can create database information and it's stored on my computer in files. Does this mean that it's initially stored on localhost and then that data is used to create files on my computer?
And then the equivalent of that for the webhost330 is that the localhost stores the database initially but then uploads it to the host at phpMyAdmin? That is the primary thing I'm confused about.
This exactly means what you assumed. When connected to localhost, you are connected to local MySQL server on same machine. Using webhost330.... you are connected to that remote MySQL server instance, if that is not the name of your own machine. Your own server can be webhost30.etcetc.
Edit
If your website is hosted here: webhost330.asu.edu then MySQL host either being webhost330.asu.edu or localhost both mean the same local MySQL server on your very machine.
Edit based on your update
If you are at home, then localhost means you are connected to a MySQL server that you have installed on your own computer. and webhost30.etc.etc means you are connected to the database you have at your school. Database do allow remote connectivity and if you are connected to school from home, that's a remote MySQL connection.
To remove your confusion, you should use only localhost in your code. localhost at home will mean the development server which is your home computer, and when you take the same code to webhost30.etc.etc then localhost for that server will mean its own MySQL installation. So localhost will work everywhere as long as you don't want your code to connect to a remote external MySQL database server.
Assuming you're at school, and assuming you're on your school network. Then yes, your machine is probably "webhost330.asu.edu". At the very least webhost330.asu.edu thinks "webhost330.asu.edu" is localhost.
To see what "localhost" refers to in terms of MySQL server, you have to look at the URL you are using to connect to the web server.
For example, if the URL is
http://localhost/phpmyadmin
and this instance of phpMyAdmin tells me that the MySQL server is on localhost, this means that the MySQL server is on my local workstation.
If the URL is http://example.com/phpmyadmin, then localhost will mean that the MySQL server is on the same machine (example.com).
I am trying to use a mysql database in my play 1.2.4 application hosted in Amazon EC2 .
For that, I configured application.conf file with the following snippet in my local environment.
db=mysql:root:password#databasename
and this works fine.
Same mysql server have been configured in my EC2 instance with same Database created .
What should be the configuration to use that DB in EC2 . After several trial and error methods , I am not able to make my Play application talk with the database .
Thanks in advance .
I would diagnose this problem with the following tests:
Can you reach your mysql server from the same machine you are running your application from?
When trying this, make sure that you use the same user and password as in your application.
Have a look at the mysql users table and check if the user is allowed to connect.
Is the mysql daemon bound to localhost or do you have to use the IP or external DNS name of the machine?
Try checking your firewall rules that the port for mysql is open from your application machine
Also check the EC2 Security group that the mysql port is open from your application machine.
We have a fairly simple M$ Access db, split into front-end (forms, reports, etc.) and back-end (tables). Currently looking for a way to get the tables with all the critical data off of one desktop and hopefully into a MySQL database on our web host, and be able to connect to it from multiple PCs (still probably only one or two people connecting to it at any give time), and eventually, hopefully, migrate to a web application when time allows. Many of the examples I've read about people connecting an Access db front-end to a MySQL back-end seem to imply that they are doing so on a LAN, probably behind a firewall, etc.
Is it at all safe to connect a M$ Access front-end to a MySQL backend when that mysql server is running on a remote web host? Does the ODBC connector take care of encryption?
TIA,
Monte
You could use putty to mount a ssh tunnel to your mysql server and redirect the remote mysql port to your machine.
Using putty is pretty straightforward:
Give it your mysql server dns name as the host and go to "Connection/SSH/Tunnels", there you define the local port to connect in the "Source Port" field (e.g. 3307).
In the the "Destination" field put the dns name of your mysql server followed by a colon and the port mysqld is running in (e.g. mysql.example.org:3306).
Save this as a profile then connect and the remote mysql port will be availbable locally on port 3307.
Just make sure you restrict the user because by default he will have an ssh shell on the server.
Setting up key authentication would also be practical because you won't have to enter a password to connect to the server (but be sure to protect your key on disk by encrypting it).
EDIT: It seems the mysql odbc connector support ssl, you could use that too but I'd personnally choose to use SSH anyway as you will have it already on your mysql server.