c.f. https://inside.pixiv.blog/sue445/7729

deploy.rb

# envリポジトリのcurrent
set :env_current, "/home/deploy/docker-gitlab-env/current"

set :stack_name, "gitlab"

namespace :stack do
  desc "docker stack deploy"
  task :deploy do
    on roles(:app) do
      within release_path do
        options = [
          "stack",
          "deploy",
          "--compose-file docker-compose.yml",
          "--compose-file #{fetch(:env_current)}/docker-compose.common.yml",
          "--compose-file #{fetch(:env_current)}/docker-compose.#{fetch(:stage)}.yml",
          fetch(:stack_name),
        ]
        execute :docker, options
      end

      invoke "stack:wait_startup"
    end
  end

  desc "Wait for stack deploy"
  task :wait_startup do
    on roles(:app) do
      # c.f. https://github.com/sudo-bmitch/docker-stack-wait
      execute :docker, "run --rm -i -v /var/run/docker.sock:/var/run/docker.sock sudobmitch/docker-stack-wait #{fetch(:stack_name)}"
    end
  end
end

after "deploy:published", "stack:deploy"