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我有一个 ruby​​ on rails 应用程序，它位于 0.0.0.0:3000 和端口 0.0.0.0:80 上的话语 docker 容器。我想将 localhost RoR 应用程序与 docker 容器绑定，因为 postgreSQL 在 docker 容器内运行，并且希望将 RoR 应用程序与 docker 容器内的 postgreSQL 连接。如何在 RoR 应用程序和 docker 容器 postgrePSQL 之间建立数据库连接。

这是我的 RoR 控制器。

class CronController < ApplicationController

    # slack channel hook
    $slackHook = "https://hooks.slack.com/services/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"
    $discourseHost = 'community.cloudways.com/';
    $messageText = "New Notification";

    # import http module
    require 'net/http'

=begin
    A method which build connection with postgreSQL and fetch last 24hr records 
=end

    def slackNotification
        logger.debug "*******Cron Started********"
        begin
            $query = "SELECT users.username AS username, topics.title AS topic_title, topics.id AS topic_id, posts.raw AS raw FROM post_replies 
                JOIN posts ON posts.id = post_replies.post_id 
                JOIN users ON users.id = posts.user_id 
                JOIN topics ON topics.user_id = users.id
                WHERE post_replies.created_at BETWEEN current_date AND current_date - INTERVAL '1' DAY;"
            $res = ActiveRecord::Base.connection.exec_query(query);

            # iteration on each record
            $res.each do |row|
                sendNotifications row
            end

            logger.debug "*******Cron successfully executed.********"
            render :json => {:status => "true", :message => "Cron successfully executed."}

        rescue Exception => e
            logger.fatal "Exception: #{e}"
        end
    end

=begin
    such method which take payload and send it to slack hook url
    @params row
=end
    def sendNotifications row
        $title = row['topic_title']
        $topicId = row['topic_id']
        $content = row['raw']
        begin
            uri = URI.parse($slackHook)
            # Full control
            http = Net::HTTP.new(uri.host, uri.port)
            response = Net::HTTP.post_form(uri, {
                'payload' => '{
                    "fallback": "#{$messageText}",
                    "text": "#{$title}",
                    "pretext": "<http://#{$discourseHost}|#{$title}>",
                    "color": "#36a64f",
                    "fields": [
                        {
                            "title": "#{$title}" , 
                            "value": "#{$content}",
                            "short": false 
                        }
                    ]
                }'
            })
        rescue Exception => e
            logger.fatal " Attributes: title: #{$title}, topicId: #{$topicId}, content: #{$content}, URL: <http://#{$discourseHost}|#{$title}> "
            logger.fatal "Exception: #{e}"
        end
    end
end
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1 回答 1

1

发布选项映射端口 docker-compose run --publish 3000:3000

您还可以在 docker yml 文件中指定

端口：-“881:80”-“3000:3000”

于 2017-07-17T14:37:22.580 回答