Daily Archives: 27 June 2011

problem using capistrano on deployment server after server ip address change

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Problem
After changing the IP address of your staging server the cap deploy does not work any more and gives you the following error:

** [192.168.0.50 :: err] Host key verification failed.
** [192.168.0.50 :: err] fatal: The remote end hung up unexpectedly

Solution
You would need to login to your staging server (as your deployment user) and do an initial checkout for one time for the ssh keys to work.
So you could do something like the following:

$ ssh user_name@staging_server
$sh -c 'git clone -q git_user@192.168.0.50:repo_name /some/tmp/dir/temp_repo_name

Make sure that you reply ‘y’ to the question about the authenticity of the host as in:
The authenticity of host '192.168.0.50 (192.168.0.50)' can't be established.
RSA key fingerprint is xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xxb.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added '192.168.0.50' (RSA) to the list of known hosts.

Next delete the newly created git project from your tmp directory, and then you should be able to use cap deploy as normal again from your development pc

You tried to assign a String or a Pathname to an uploader, for security reasons, this is not allowed.

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Problem
You would like to use Carrierwave for file uploads, but you get the following error if you are trying to use factories for running your cucumber scripts:

You tried to assign a String or a Pathname to an uploader, for security reasons, this is not allowed.

That happens if you try to assign inside your factory template, to your file field the path like f.file “path_to_file”

Solution

You would need to slightly modify your factory template to use the file path as follows:

f.file File.open(File.join(Rails.root,"path_to_file"))