I'm looking for a way to run two instances of the same application on ruby on rails. Let's I've a rails application myApp and I've version 18 and 19 of it. How can I've them running simultaneously in production?
Thanks in advance for any help
You can have two versions to run at the same time by configuring them under two different paths and hosts in your webserver.
What you should avoid, however, it to share the same resources (for instance the database). If your database schema has changed, the one with the legacy schema will not be able to run.
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I’m new to Docker, I think I’m getting it down for server setup using docker, however I want to use Docker so non-engineer staff in my company can more easily setup a Rails dev enviroment, database, installing libraries on the ruby and javascript end, that kind of thing.
I can do it using Docker, however it requires getting into the docker engine and tweaking databases and what not which I feel is asking a lot for a non-engineer persons and doesn’t lessen there burden as just setting them up natively.
I’ve looked around on guides to setup Rails environments but they all tend to have a lot of work required to get everything up and running, I wish to have a more easier way of just fire up terminal and go to the project folder, smack 1 or 2 commands in and have it all done, is there any guide or example setup to do something like this?
is it possible (or a good idea) to run multiple Phusion passenger instances on 1 server (same rails app on many instances).
I wanna use Nginx as Frontend webserver (loadbalancer).
Any best practice?
Thanks
Yes it is possible and quite easy. Just you need to run it on different port.
You can refer this link.
In this, they have ran same application on multiple ruby version.
Yes it is possible and works fine. Just make sure they're assigned on different ports.
I am looking to create a shared hosting environment allowing for multiple RoR apps to be running well isolated from one another (and the underlying os), running different versions of RoR as required.
My question is can this be done without having to resort to OpenVZ/Virtualisation?
If so, would the following approach be suitable - what would be required to make apps well isolated from each other and the OS?
NGinx, single instance for load balancing
Unicorn, multiple instances started by NGinx to handle requests (capable of running different versions of RoR
(Rbenv or RVM) and Bundler allow to isolate gems of different Rails applications.
So there will be no troubles with that.
Each rails app will have its own instance of Unicorn(puma, thin, whatever).
Nginx will have separate domain name based virtual host for each rails app, and will forward requests to upstream(Unicorn/Puma).
Each rails app should have separate database at db server too.
So I don't see any problems with isolating multiple rails apps.
For additional isolation you can use Docker, so each app will be running in separate container.
I am in the process of learning Ruby on Rails and things have been going smoothly - up until I tried to deploy one of my test applications to my shared hosting account.
I use Host Gator and was able to successfully create a new Ruby on Rails app via cPanel and run it. The only problem is that when you create a new app this way, it populates its directory with a blank application - as would rails new app_name locally. When I delete the files and folders in this directory and replace them with my own, then attempt to run the app, cPanel says that it is running on the confirmation page but it never actually starts. I am not receiving any error messages either.
The host seemed rather stumped, stating that it should be a matter of deleting the initial files and folders and replacing them, then running. The app works fine locally so I do not think that it is a code issue. In my research I came across Passenger, although it is way over my head and it would appear that you really need to have total control over Apache to make it all work, including ssh.
If it makes any difference, the apps I made locally were put together using an installation of Rails Installer and are scaffolded. For testing I am using a bare minimum app with about three fields in the table.
What am I missing? Any help would be appreciated.
Maximum supported versions on 26/10/2013 are:
Ruby 1.8.7
RubyGems 1.8.25
Rails 2.3.18
Anything newer than that is a near guaranteed breakage and cPanel & WHM will be incapable of utilizing it in any way, shape, or form.
We can assist you with removing your existing Ruby on Rails installations and reverting them back to cPanel supported and sanctioned versions (Ruby 1.8, RubyGems 1.8, and Rails 2). That is the only thing we can do for you at this time.
If you want to use any versions newer than this, then you will be unable to use the cPanel & WHM interfaces or management tools for it -- they simply will not work. You will then have to manually manage your RoR install by yourself through command line exclusively. None of it would fall under the scope of cPanel support.
You can use http://ndeploy.in which is a third party plugin to integrate Rails Hosting via Phsuion Passenger in cPanel .
Just to let others who is using Cpanel with rails know.
I was able to use Cpanel to create a rails app, start it, and do the redirection all within Cpanel.
Nothing to modify or change. Quite straightforward for me.
So I guess it would be easier to do the development work straight on the server itself.
Have not tried to deploy a locally developed rails to shared server, or any per se. But I'm guessing we could create rails with Cpanel and replace the files in the directory generated.
I want to start experimenting with all these different web frameworks that are available. I was wondering if they could all run in one machine at the same time?
I know that all my database services can all run at the same time, along with the Javascript frameworks, but what about something like Rails and Java applications? Can those play along with each other? Will Apache handle all of this for me?
Yes, since almost any language framework runs as normal code for the language, simply providing structure for applications you write, they can coexist well with other frameworks for the same or other languages. You can certainly run Rails and a Java framework on the same machine - you could even run Rails on JRuby and a Java application server
It sounds like you're just getting started programming. I would recommend learning some of the basics first. For instance, if you want to learn Ruby, try the Pickaxe book, write some simple scripts, then move on to a ruby web framework like Sinatra or Rails. You'll have a better understanding of the difference between a language and framework, how each is installed and run on your machine, etc.
The easiest way to begin experimenting is to use the development server that is included with the various frameworks and run the server on a different port (not 80). For Rails, this is done via:
ruby script\server
which will start a server on port 3000.
Other frameworks use other approaches. Most tutorials for Ruby and Python frameworks (with which I am most familiar) will include instructions on how to start a development server like this.
I don't see why not. It really depends on how the frameworks are deployed and in what containers. If they use separate containers (e.g. tomcat vs apache) you'll need to make sure that the containers are configured to use different ports since many web containers use 80 or 8080.
If you plan on running them all in the same container (e.g. Apache) then I would think they'd be fine, since each one can be treated as a separate web application and deployed to a different location in your document root.
For the most part, it'll probably be trial and error. I don't know much about how Rails interacts with Java, but I've run Grails and Java applications together easily myself with few problems.
I run Rails, PHP, and Java with one Apache server. Except for what felt like a ton of apache config munging when I set it all up, it's been fine. I'm not much of a sysadmin, so it took me a few days to get everything running right.
PHP, Java and Rails all have environments that let you run independent servers and save complex configuration.
Java you can use Tomcat or Jetty.
Rails comes with Webrick, which is fine for development.
PHP has XAMPP (or MAMP if your on the Mac) gives you a complete stack.
I run Rails and ASP.NET MVC on the same Machine and I just set my local servers to run on different ports. But usually the default setup (e.g. Rails on port 3000) will not conflictwith each other, plus each framework usually has its own way to run (LAMP, Webrick, Montgrel...) so you should be fine.