I'm not 100% sure what the "host key verification failed" error is about, but I suspect it is Subversion's SSH connection complaining that it cannot verify the host key of the host it is trying to connect to. Regarding passwordless authentication, you'll need to make sure that you have your keys set up such that you can ssh from the EC2 instance to your "foo.bar.com" server (the one hosting your svn repository).

- Jamis

On Apr 30, 2008, at 11:45 PM, jfrankov wrote:


I'm trying to deploy my application on an Amazon EC2 instance running
Ubuntu. I have a keypair set up and can log into the instance using
ssh just fine. Matter of fact, all my capistrano tasks run fine on the
instance until I try to do an svn checkout:

 * executing `deploy:setup'
 * executing "umask 02 && mkdir -p /mnt/app /mnt/app/releases /mnt/
app/shared /mnt/app/shared/system /mnt/app/shared/log /mnt/app/shared/
pids"
 * executing `deploy:check'
You appear to have all necessary dependencies installed
 * executing `deploy:update'
** transaction: start
 * executing `deploy:update_code'
 * executing "svn checkout -q  -r2048 svn+ssh://foo.bar.com/svn/baz/
code/ror/tags/quez/12
/mnt/app/releases/20080501051610 && (echo 2048 > /mnt/app/releases/
20080501051610/REVISION)"
   servers: ["ec2-75-101-xxx-xxx.compute-1.amazonaws.com"]
   [ec2-75-101-xxx-xxx.compute-1.amazonaws.com] executing command
** [err] Host key verification failed.
** [err] svn: Connection closed unexpectedly
   command finished
*** [deploy:update_code] rolling back

(I've edited the output for brevity.)

I get "Host key verification failed", so I log in to the instance and
try to execute the command manually to see what the problem is:

[EMAIL PROTECTED]:~# svn checkout -q  -r2048 svn
+ssh://foo.bar.com/svn/baz/code/ror/tags/quez/12 /mnt/app/releases/
20080501051610 && (echo 2048 > /mnt/app/releases/20080501051610/
REVISION)
[EMAIL PROTECTED]'s password:

...so I assume that the password prompt is what's preventing
capistrano from working. My question is, how do I get the instance to
not ask for a password?

Any & all advice is appreciated- thanks!

-Jason


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