How to connect to a resource behind your SSH bastion Your SSH bastion is updated with the new SSH keys. Manage a PostGreSQL database with Adminer.Change the password of a PostGreSQL database.Manage a MySQL database with PHPMyAdmin.Change the password of a MySQL database.Solve email account connection problems.Encrypt your emails with PGP using the Scaleway webmail.Change the password of an email account.bashrc (note the addition of the M to the command we used above). To make our lives easier, we'll create some aliases in. We're gonna tell ssh to connect and create a control socket (whatever that is) for our connection by passing it the -M flag and updating our config. We can fix that with some more ~/.ssh/config and a couple shell aliases (shamelessly stolen from this post). The main problem is that output of ssh stupid-computer doesn't really give us any feedback, so we don't know if that's up and running. This is all fine and it works but we have to have the ssh process running and we're definitely going to forget to do that and then it'll all break and we'll wonder why and why oh why do we have to do these things? You need to have the ssh connection to the bastion server up and running in order for your model to be able to access that database. bin/rails c and unt should return the number of rows in the whyyy table in the public schema on remote_db.Īnd that's about it. Here's what our ~/.ssh/config file is going to look like:Įnter fullscreen mode Exit fullscreen mode That's a bit of a mouthful to type out every time, so here's what we're going to do we'll use the ~/.ssh/config file to set configure an ssh connection and specify the tunnel in there so that every time we ssh into the box the tunnel will be set up and our connection to the remote database will Just Work™ (aye, right). I didn't really read the man page.įor us, that makes the whole thing look something like this: Basically you give it the local port you want the connection for forward, the host you want it forwarded to, and the port on that host that the traffic should end up on. What we want is to forward a port on our local machine to a port on the bastion server, which in turn forwards traffic on that port through to the appropriate port on the RDS server, adding absolutely nothing of value on the way except "security". Tunnel from the bastion server to the RDS instance Now all we gotta do is get this box on our desk to talk to the RDS instance through the bastion server. Now we have our computer talking to the bastion server and the bastion server talking to the RDS. This is 10x engineering right here - accessing a sodding database. Fill in the blanks, smash that enter key and probably enter a password. On the bastion server we should be able to run something like psql -h "" name_of_database username. Then we have to connect from the freakin' bastion server to the RDS instance living inside it's ivory tower with no bloody internet access. You'll want to add your ssh keys to the box and stuff. You basically want to run something like ssh where user is the username of the account you'll be accessing the machine as and ip address is the IP address of the stupid computer getting in the way of you and your multi-database dreams. The first thing we have to be able to do is to access the bastion server from our local machine. Here's probably the worst guide in the world to setting up the sort of configuration we're working with. But because reasons it also connects to another database that is massive and a total Pain In The Ass (PITA).īecause "The Man" cares about security, the only way to access that second RDS instance is through a "bastion" server, which makes this a 10x PITA. Right, here's what we're doing local Rails app connects to a local Postgres instance in the usual way. Editor's note: this is supposed to be a bit tongue-in-cheek.
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