Multiple Capistrano 3 questions

[José Sá]

Hi all,

i'm trying to create a custom deploy script but having some trouble in some aspects:

1. I want to deploy the servers with role DB before starting to run other servers. So:

 Start deploy

 - Run deploy sequence in the the servers with the specific role,

 - When finished start the other servers

This scenario doesn't seem to be covered natively.

2. I need to perform some complex file manipulation on the remote server as part of the deployment process.

Currently I have a bash script that does this but I would prefer to have the whole deployment script inside Capistrano rules instead of calling external scripts.

I can convert it into ruby (is mostly reading a bunch of files and use sed to generate a new one), so I would like to know the best practise here.

Call invoke with a multiline script?

[Lee Hambley]

Hi Jose,

It's not clear from your post whether you're loading the `rails/all` (or maybe just `rails/migrations`, but I'll answer under the assumption that you're not, and that if you are, whatever they do to your database servers (run migrations) is not a problem.

Assuming that you can convert your script to Ruby, or run it still via Bash, probably Ruby would be more robust, anyway, http://www.shellcheck.net/ is a decent tool to run your Bash script through, if sticking with Bash. Both will work.

# https://github.com/capistrano/sshkit/blob/master/EXAMPLES.md#upload-a-file-from-disk

task :fixitup do

on roles(:db) do |host|

 upload! './my-local-script.rb', './my-script.rb'

 execute :ruby, "./my-script.rb"

end

end

# http://capistranorb.com/documentation/getting-started/before-after/

# http://capistranorb.com/documentation/getting-started/flow/

after "deploy:starting", "fixitup"

Lee Hambley

http://lee.hambley.name/

+49 (0) 170 298 5667

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[José Sá]

Hummm I see,

I was hoping to precisely get rid of helper scripts in order to deploy. I was hoping to be able to write a few helper methods in ruby that could be run directly in the remote host. But I guess that is limited with "oneliner" shell commands.

José

[Lee Hambley]

Capistrano runs locally, you can script commands to replace your script, or upload it.

To view this discussion on the web, visit https://groups.google.com/d/msgid/capistrano/276f8bc4-d956-43a3-8be9-6929a37afeb7%40googlegroups.com.