MissionControl::Servers

The goal of MissionControl::Servers is to provide a simple monitoring of the resources on your Ruby on Rails application. You can either use this directly on the projects or create a separate Ruby on Rails application to mount this in.

Installation

Add this line to your application's Gemfile:

bundle add "mission_control-servers"
bin/rails mission_control_servers:install:migrations

Add a mount to your config/routes.rb

mount MissionControl::Servers::Engine => "/mission_control-servers"

Configuration

Within your application, you can make some configuration changes in how the gem operates. Below are the default configuration options. You can override these options by creating an initializer file.

For example, if you're wanting to use MissionControl::Servers in a single project, then there is no need to have the ability to create multiple projects. You can set the single_project_mode to true which will hide the ability to create new projects.

# config/initializers/mission_control_servers.rb
MissionControl::Servers.configure do |config|
  config.single_project_mode = true
end

Usage

Create a project. Once you create a project, you can easily copy the script specific to that project.

Install a script which captures:

• Hostname
• CPU Usage
• Memory Usage
• Free Memory
• Free Disk Space

The data will be retained for 7 days automatically. After 7 days, the data will start truncating itself so that it doesn't take up much disk space within the database.

If you would like to put the dashboard on something like a Raspberry Pi, you can use the dark parameter to change the dashboard to a dark mode automatically. This will hopefully help provide a "hands off" approach to setting up the kiosk mode.

You can also create public links with read only permissions.

URL Configuration

Dark Mode

http://localhost:3000/mission_control-servers/projects?dark=true

Interval

You can also adjust the interval when you have multiple servers on a project. The default setting is 10 seconds between servers, but this can be adjusted with an URL Parameter. The interval value is entered in seconds.

http://localhost:3000/mission_control-servers/projects?interval=10

Combo History

By default, the CPU Usage and Memory Usage Line Chart will be combined, but you can add the URL Parameter ?combo=false to toggle this behavior. Default is true.

http://localhost:3000/mission_control-servers/projects?combo=false

Combining URL Parameters

If you need to change multiple settings, you can chain these in the URL Parameters.

http://localhost:3000/mission_control-servers/projects?interval=30&dark=true&combo=false

Protecting the Dashboard

You can protect the dashboard by using a constraint. This will allow you to only allow certain users to access the dashboard. However, the ingress still needs to be accessible by the servers which are being monitored. In order to install the script on the servers, you also have to expose the endpoint for the script.

Rails.application.routes.draw do
  MissionControl::Servers::RoutingHelpers.add_public_routes_helper(self)

  constraints AdminConstraint do
    mount MissionControl::Servers::Engine => "/mission_control-servers"
  end

end

If you want to change the endpoint, you can do so by changing the mount path.

Rails.application.routes.draw do
  engine_mount_path = "/dashymcdashface"
  MissionControl::Servers::RoutingHelpers.add_public_routes_helper(self, engine_mount_path)

  constraints AdminConstraint do
    mount MissionControl::Servers::Engine => engine_mount_path
  end

end

In this example, we have directly given a path to the ingress, but locked down everything else to the AdminConstraint. The AdminConstraint takes in the request and calls the matches? method. If the method returns true, then the routes will be defined for that request.

class AdminConstraint
  def self.matches?(request)
    true
  end
end

Demo

You can see a demo of the application at https://dashboard.railsenv.com/

Screenshots

Simple Installation

View all of your projects

Detailed Dashboard updates automatically

Dark Mode support added in v0.1.4 (you can set this with a URL Param dark=true)

License

The gem is available as open source under the terms of the MIT License.