如何启动 Rails 任务作为服务

Question

我在 Rails 应用程序中编写了一个 TCP 服务器作为 Rails 任务。 然而，它可以从以下位置开始：

  rails socketing:start  

如果希望它成为一个在背景中继续运行的任务，该进程将开始执行，他们将其更改为：

nohup rails socketing:start &

并且将继续在backgroup中工作，因为tcp服务器已经实现了多线程，如果出现错误只会停止1个线程。

现在我希望这个过程由服务在 ubuntu 服务器启动时启动，以创建服务并启用它。 但代码中断了 你能建议一个出路吗 我的服务写的是：

[Unit]
Description = TCP at 51234
After = network.target

[Service]
Environment="HOME=/home/vidur"
ExecStart = /home/vidur/rails_app/tukaweb/custom_script.sh

[Install]
WantedBy = multi-user.target

我的custom_script.sh为：

#!/bin/bash

 cd /home/vidur/rails_app/project_dir
/home/vidur/.rbenv/shims/bundler exec rails socketing:start

启动服务为：

sudo systemctl start socketing.service

它给出的o/p为：

Jun 10 17:45:31 Vidur-PC systemd[1]: Started TCP at 51234.
Jun 10 17:45:31 Vidur-PC systemd[1]: socketing.service: Succeeded.

但是没有启动rails任务，甚至没有识别rails环境： 我的 Rails 任务为：

  task start: :environment do
    require 'socket'
    puts "Started TCP Server at PORT 53492"
    server = TCPServer.new 51324 # Server bound to port 51234
   loop do
      Thread.start(server.accept) do |client|
      client.close
    end
   end

    p "result = #{result}"
    p 'Bye'
  end

此代码给出以下错误：

Jun 10 19:16:40 Vidur-PC systemd[1]: Started TCP at 53492.
Jun 10 19:16:43 Vidur-PC custom_script.sh[60012]: rake aborted!
Jun 10 19:16:43 Vidur-PC custom_script.sh[60012]: ArgumentError: couldn't find login name -- expanding `~'
Jun 10 19:16:43 Vidur-PC custom_script.sh[60012]: /home/vidur/rails_app/tukaweb/config/application.rb:8:in `<top (required)>'
Jun 10 19:16:43 Vidur-PC custom_script.sh[60012]: /home/vidur/rails_app/tukaweb/Rakefile:4:in `require_relative'
Jun 10 19:16:43 Vidur-PC custom_script.sh[60012]: /home/vidur/rails_app/tukaweb/Rakefile:4:in `<top (required)>'
Jun 10 19:16:43 Vidur-PC custom_script.sh[60012]: /home/vidur/.rbenv/versions/2.7.2/bin/bundler:23:in `load'
Jun 10 19:16:43 Vidur-PC custom_script.sh[60012]: /home/vidur/.rbenv/versions/2.7.2/bin/bundler:23:in `<main>'
Jun 10 19:16:43 Vidur-PC custom_script.sh[60012]: (See full trace by running task with --trace)
Jun 10 19:16:44 Vidur-PC systemd[1]: socketing.service: Main process exited, code=exited, status=1/FAILURE
Jun 10 19:16:44 Vidur-PC systemd[1]: socketing.service: Failed with result 'exit-code'.

更新了application.rb文件：

require_relative 'boot'

require 'rails/all'

# Require the gems listed in Gemfile, including any gems
# you've limited to :test, :development, or :production.
Bundler.require(*Rails.groups)

module TukaWeb
  class Application < Rails::Application
    # Initialize configuration defaults for originally generated Rails version.
    config.load_defaults 5.1
    if Rails.env.development?
        config.active_job.queue_adapter  = :async
      else
        config.active_job.queue_adapter  = :sidekiq
    end

    config.generators.javascript_engine = :js

    config.action_dispatch.default_headers = {
        'Access-Control-Allow-Origin' => 'https://tukadata.tukatech.com',
        'Access-Control-Request-Method' => %w{GET POST OPTIONS}.join(",")
    }
    # Settings in config/environments/* take precedence over those specified here.
    # Application configuration should go into files in config/initializers
    # -- all .rb files in that directory are automatically loaded.
  end
end

它说明了 tcp 进程 rake 任务，但仅适用于 root 用户。

数据库剩余错误：

`connect': Access denied for user 'root'@'localhost'

但是如果进程正常运行，那么它就会运行。

Answer 1

问题出在 puma 身上，他需要回家，所以更新的服务如下：

[Unit]
Description = TCP at 51234
After = network.target

[Service]
Environment="HOME=/home/vidur"
ExecStart = /home/vidur/rails_app/tukaweb/custom_script.sh

[Install]
WantedBy = multi-user.target