How do configure Coda to work for my Amazon EC2 instance?

Question

I can not connect to my EC2 instane. I have opened port 21 in the AWS Console. I think there is no way of input my SSH Key pair in Coda. Is there a way of connecting Coda to my EC2 instance?

Answer 1

Coda should pick up settings from your ssh config so you can configure this fairly easily.

If you've saved your EC2 ssh keypair in ~/.ssh/ec2_rsa then simply edit ~/.ssh/config to look like:

IdentityFile ~/.ssh/ec2_rsa

You can also restrict the IdentityFile directive to just your AWS resource with:

Host somehost.amazonaws.com
    IdentityFile ~/.ssh/ec2_rsa

If everything's configured properly then you should be able to, from the command line, run ssh username@awshost and get a login prompt

If you continue to have problems you can always enable password authentication on your instance by editing /etc/ssh/sshd_config and adding the line PasswordAuthentication yes to the end of the file, then setting a password for your user with passwd

I use the following settings in my .ssh/config to automatically apply my EC2 keypairs for EC2 resources:

# EC2 Northern Virginia
Host *.compute-1.amazonaws.com
    IdentityFile ~/.keys/ssh/ec2/us_east_1.key
    StrictHostKeyChecking no
    UserKnownHostsFile /dev/null
    IdentitiesOnly yes
    ForwardAgent no

# EC2 Northern California:
Host *.us-west-1.compute.amazonaws.com
    IdentityFile ~/.keys/ssh/ec2/us_west_1.key
    StrictHostKeyChecking no
    UserKnownHostsFile /dev/null
    IdentitiesOnly yes
    ForwardAgent no

# EC2 Ireland:
Host *.eu-west-1.compute.amazonaws.com
    IdentityFile ~/.keys/ssh/ec2/eu_west_1.key
    StrictHostKeyChecking no
    UserKnownHostsFile /dev/null
    IdentitiesOnly yes
    ForwardAgent no

# EC2 Singapore:
Host *.ap-southeast-1.compute.amazonaws.com
    IdentityFile ~/.keys/ssh/ec2/ap_southeast_1.key
    StrictHostKeyChecking no
    UserKnownHostsFile /dev/null
    IdentitiesOnly yes
    ForwardAgent no

# EC2 Tokyo:
Host *.ap-northeast-1.compute.amazonaws.com
    IdentityFile ~/.keys/ssh/ec2/ap_northeast_1.key
    StrictHostKeyChecking no
    UserKnownHostsFile /dev/null
    IdentitiesOnly yes
    ForwardAgent no