So just using the same (external) IP address on the new server makes sense. To clarify, you typically dont use scp to copy a file to or from your local machine (System A) while logged in to a remote server (System B) with ssh.scp will log you into the remote server, copy the file, then log you out again in one process, so just run it from a shell on your local machine. (since in the known_hosts file of the remote client, the server's IP & server's certificate were stored together) Worse, if you assign that IP address to another ssh server, they might even be warned of a man-in-the-middle attack. Regarding the IP address change, assuming the remote clients actually see a change in IP (you're not behind some reverse proxy or anything), then no, they will require the user the accept the certificate again. App servers has Nginx + Passenger and running for a Rails app. Again, don't forget the permissions here. 49 I have 2 app servers with a loadbalancer in front of them and 1 database server in my system. This info is stored normally in /home/-account-/.ssh/ (under authorized_keys).
#Ssh key copy to server password
(Good as well, as an unprotected private key is a very bad idea.)Ģ) If you have already added public keys of remote hosts that are trusted and don't require a password to log in anymore, you'll also have to copy that info in order for the auto-login to work again now. Make sure you correctly copy the permissions too! The sshd will simply ignore keys that are not properly protected. You'll find the sshd config there, as well as the host-keypair. You'll need your public key (or jenkins one) on each deploy user's authorized_keys.1) If your sshd config files are stored under /etc/ssh/, you'll need to copy all of those.
You'll also require a deploy user on each app machine, to be used later on during deployment process.
You should read the section 'Authentication'. This is completly described in the manpage of openssh, so I will quote a lot of it. The private key must be kept on Server 1 and the public key must be stored on Server 2. You can output the contents of the key and pipe it into the ssh command. 100 You need your SSH public key and you will need your ssh private key. If you do not have the ssh-copy-id utility available, but still have password-based SSH access to the remote server, you can copy the contents of your public key in a different way. ssh-copy-id user123.45.56.78 Alternatively, you can paste in the keys using SSH: cat /.ssh/idrsa.pub ssh user123.45.56.78 'cat > /. Use the ssh-copy-id command to append the public key in the local /.ssh/idrsa.pub file to the /.
Make sure to replace the example username and IP address below. The default identity is your 'standard' ssh key. You can copy the public key into the new machines authorizedkeys file with the ssh-copy-id command. This may have security implications (you are indeed sharing keys between all instances!), but it'll simplify a lot the provisioning process. Copying your Public SSH Key to a Server Without SSH-Copy-ID. 8 Answers Sorted by: 612 The ssh-copy-id command (in the openssh-client package and installed by default) does exactly this: ssh-copy-id copies the public key of your default identity (use -i identityfile for other identities) to the remote host. The most straightforward solution I can think of would be to generate a fresh key pair for your application, to be shared accross all your app instances.
#Ssh key copy to server how to
Take a look to the authorized_key module for getting info on how to manage your public keys.
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