Capistrano: Nie wiem, jak zbudować zadanie "deploy: new_release_path"

Question

Rozmieszczam po raz pierwszy kropelkę Digital Ocean Ubuntu. Skonfigurowałem wszystko i wykonałem wszystkie kroki, a teraz jestem na etapie, w którym wydaję polecenie: cap production deploy:initial. Tego polecenia wracam ten komunikat o błędzie:

cap aborted! 
Don't know how to build task 'deploy:new_release_path' (see --tasks) 
/Users/Christopher/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/rake-12.0.0/lib/rake/task_manager.rb:58:in `[]' 
/Users/Christopher/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/rake-12.0.0/lib/rake/task.rb:361:in `[]' 
/Users/Christopher/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/capistrano-3.7.1/lib/capistrano/dsl/task_enhancements.rb:12:in `after' 
/Users/Christopher/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/capistrano-3.7.1/lib/capistrano/scm/git.rb:21:in `register_hooks' 
/Users/Christopher/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/capistrano-3.7.1/lib/capistrano/configuration/plugin_installer.rb:28:in `install' 
/Users/Christopher/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/capistrano-3.7.1/lib/capistrano/configuration.rb:155:in `install_plugin' 
/Users/Christopher/ClientProjects/PawBookings/Capfile:3:in `<top (required)>' 
/Users/Christopher/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/rake-12.0.0/lib/rake/rake_module.rb:28:in `load' 
/Users/Christopher/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/rake-12.0.0/lib/rake/rake_module.rb:28:in `load_rakefile' 
/Users/Christopher/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/rake-12.0.0/lib/rake/application.rb:687:in `raw_load_rakefile' 
/Users/Christopher/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/rake-12.0.0/lib/rake/application.rb:96:in `block in load_rakefile' 
/Users/Christopher/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/rake-12.0.0/lib/rake/application.rb:178:in `standard_exception_handling' 
/Users/Christopher/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/rake-12.0.0/lib/rake/application.rb:95:in `load_rakefile' 
/Users/Christopher/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/rake-12.0.0/lib/rake/application.rb:79:in `block in run' 
/Users/Christopher/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/rake-12.0.0/lib/rake/application.rb:178:in `standard_exception_handling' 
/Users/Christopher/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/rake-12.0.0/lib/rake/application.rb:77:in `run' 
/Users/Christopher/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/capistrano-3.7.1/lib/capistrano/application.rb:14:in `run' 
/Users/Christopher/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/capistrano-3.7.1/bin/cap:3:in `<top (required)>' 
/Users/Christopher/.rbenv/versions/2.3.1/bin/cap:22:in `load' 
/Users/Christopher/.rbenv/versions/2.3.1/bin/cap:22:in `<main>' 

Capfile

# Load DSL and Setup Up Stages 
require 'capistrano/scm/git' 
install_plugin Capistrano::SCM::Git 
require 'capistrano/setup' 
require 'capistrano/deploy' 

require 'capistrano/rails' 
require 'capistrano/bundler' 
require 'capistrano/rvm' 
require 'capistrano/puma' 

# Loads custom tasks from `lib/capistrano/tasks' if you have any defined. 
Dir.glob('lib/capistrano/tasks/*.rake').each { |r| import r } 

config/deploy.rb

# Change these 
server '12.34.56.789', port: 80, roles: [:web, :app, :db], primary: true 

set :repo_url,  'my_ssh_github_url' 
set :application,  'app_name' 
set :user,   'deploy_username' 
set :puma_threads, [4, 16] 
set :puma_workers, 0 

# Don't change these unless you know what you're doing 
set :pty,    true 
set :use_sudo,  false 
set :stage,   :production 
set :deploy_via,  :remote_cache 
set :deploy_to,  "/home/#{fetch(:user)}/apps/#{fetch(:application)}" 
set :puma_bind,  "unix://#{shared_path}/tmp/sockets/#{fetch(:application)}-puma.sock" 
set :puma_state,  "#{shared_path}/tmp/pids/puma.state" 
set :puma_pid,  "#{shared_path}/tmp/pids/puma.pid" 
set :puma_access_log, "#{release_path}/log/puma.error.log" 
set :puma_error_log, "#{release_path}/log/puma.access.log" 
set :ssh_options,  { forward_agent: true, user: fetch(:user), keys: %w(~/.ssh/id_rsa.pub) } 
set :puma_preload_app, true 
set :puma_worker_timeout, nil 
set :puma_init_active_record, true # Change to false when not using ActiveRecord 

## Defaults: 
# set :scm,   :git 
# set :branch,  :master 
# set :format,  :pretty 
# set :log_level,  :debug 
# set :keep_releases, 5 

## Linked Files & Directories (Default None): 
# set :linked_files, %w{config/database.yml} 
# set :linked_dirs, %w{bin log tmp/pids tmp/cache tmp/sockets vendor/bundle public/system} 

namespace :puma do 
    desc 'Create Directories for Puma Pids and Socket' 
    task :make_dirs do 
    on roles(:app) do 
     execute "mkdir #{shared_path}/tmp/sockets -p" 
     execute "mkdir #{shared_path}/tmp/pids -p" 
    end 
    end 

    before :start, :make_dirs 
end 

namespace :deploy do 
    desc "Make sure local git is in sync with remote." 
    task :check_revision do 
    on roles(:app) do 
     unless `git rev-parse HEAD` == `git rev-parse origin/master` 
     puts "WARNING: HEAD is not the same as origin/master" 
     puts "Run `git push` to sync changes." 
     exit 
     end 
    end 
    end 

    desc 'Initial Deploy' 
    task :initial do 
    on roles(:app) do 
     before 'deploy:restart', 'puma:start' 
     invoke 'deploy' 
    end 
    end 

    desc 'Restart application' 
    task :restart do 
    on roles(:app), in: :sequence, wait: 5 do 
     invoke 'puma:restart' 
    end 
    end 

    before :starting,  :check_revision 
    after :finishing, :compile_assets 
    after :finishing, :cleanup 
    after :finishing, :restart 
end 

# ps aux | grep puma # Get puma pid 
# kill -s SIGUSR2 pid # Restart puma 
# kill -s SIGTERM pid # Stop puma 

config/nginx.conf

upstream puma { 
    server unix:///home/deploy_username/apps/app_name/shared/tmp/sockets/app_name-puma.sock; 
} 

server { 
    listen 80 default_server deferred; 
    # server_name example.com; 

    root /home/deploy_username/apps/app_name/current/public; 
    access_log /home/deploy_username/apps/app_name/current/log/nginx.access.log; 
    error_log /home/deploy_username/apps/app_name/current/log/nginx.error.log info; 

    location ^~ /assets/ { 
    gzip_static on; 
    expires max; 
    add_header Cache-Control public; 
    } 

    try_files $uri/index.html $uri @puma; 
    location @puma { 
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; 
    proxy_set_header Host $http_host; 
    proxy_redirect off; 

    proxy_pass http://puma; 
    } 

    error_page 500 502 503 504 /500.html; 
    client_max_body_size 10M; 
    keepalive_timeout 10; 
} 

Aktualizacja:

przeprowadziłem kilka linijek kodu w Capfile. Proces wydaje się zaczęły, ale teraz wydaje następujący komunikat o błędzie:

** Invoke production (first_time) 
** Execute production 
** Invoke load:defaults (first_time) 
** Execute load:defaults 
** Invoke bundler:map_bins (first_time) 
** Execute bundler:map_bins 
** Invoke deploy:set_rails_env (first_time) 
** Execute deploy:set_rails_env 
** Invoke deploy:set_linked_dirs (first_time) 
** Execute deploy:set_linked_dirs 
** Invoke deploy:set_rails_env 
** Invoke rvm:hook (first_time) 
** Execute rvm:hook 
cap aborted! 
Net::SSH::Disconnect: connection closed by remote host 

Nowy Capfile

# Load DSL and Setup Up Stages 
require 'capistrano/setup' 
require 'capistrano/deploy' 

require 'capistrano/rails' 
require 'capistrano/bundler' 
require 'capistrano/rvm' 
require 'capistrano/puma' 
require 'capistrano/scm/git' 
install_plugin Capistrano::SCM::Git 

# Loads custom tasks from `lib/capistrano/tasks' if you have any defined. 
Dir.glob('lib/capistrano/tasks/*.rake').each { |r| import r } 

Answer 1

Wtyczka Git polega na zadania Wdrażanie występuje. W swojej Capfile, należy zainstalować wtyczkę Git po wymagające capistrano/deploy coś takiego:

require "capistrano/deploy" 
require "capistrano/scm/git" 
install_plugin Capistrano::SCM::Git