What is the best way to run an Unicorn Rails Server automatically on machine power up?
Thank you
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I have a Rails 4 application with PostgreSQL running on a Linode Ubuntu 14.04 server with Xen hypervisor. Linode support sent me a notice saying that they will be conducting maintenance on Xen tomorrow morning. There is a 2 hour window where my VPS will be down.
What should I do to prepare for the reboot? I plan to back up the database but I'm not sure what else to expect. The application is running with passenger on NGINX. Will NGINX restart automatically? Will I have to repopulate my database with the dump I make? Please help because I can't afford a lot of down time.
Many thanks
This should be fine. This is pretty standard for most VPS's and it happens with some regularity. Xen is the 'under the covers' stuff Linode uses to manage virtual servers, but should not effect anything on your server. Should not be any different than if you were reboot your server manually with sudo reboot.
Apologies for these stupid questions (please explain why if you're going to downvote).
I have a site running on a LAMP stack on a Linode Ubuntu VPS and want to learn rails on the remote server without causing disruption to the site currently at mydomain.com.
1) Can I install rails the normal way (as I would on my own PC), and have it not effect the site that is currently up?
2) If a generate an app skeleton after installation, after starting the rails server, how can I navigate the default view?
1) Your test Rails app and the production PHP app can co-exist (hopefully you know your way around Linux) on the same server without interfering with each other. However, I would not recommend this. Bad idea to be trying experimental stuff on production VMs/VPSs. You are better off spooling a test VPS for Rails or better still use VirtualBox VMs on your local machine.
2) Rails apps start on port 3000 by default. So on the VPS, you can reach the Rails app root at http://xxx.xxx.xxx.xxx:3000 (replace the x's with your VPS's IP addr.)
We are trying to access a Rails application running on a Ubuntu machine from a Windows machine and the time it takes to load the application is extremely slow. The ping operation from the Windows machine to the Ubuntu machine comes back in < 1ms. How do I debug this issue?
If you are running your rails applications with command 'rails server' which by default a webrick, it will take time for other machines to load, try installing the application in apache server within your ubuntu machine and access it with your system ip and the symlink.(http://0.0.0.0/symlink) For the first time when you restart your apache server, it will take time and then it should load in shorter time than in webrick.
I am using Ruby on Rails 3.0.9 and I would like to publish my web site. I already set my VPS running Ubuntu 10.04 LTS and the capistrano gem (this one I think as well as possible). Now, what I need to do is to upload all files to the www/project_name directory (I am on Mac OS)...
What I have to do to accomplish that?
You don't need your deployment machine to have Capistrano. Capistrano automates a bunch of tasks that I suggest you do at least one manually so you know what's going on. Sooner or later, you'll be debugging some Capistrano task, so you may as well figure out the guts sooner or later.
Coarsely, what you need to do is to basically duplicate your development environment on your production machine. If you have it on version control, you can git clone or svn whateveritis on your production machine. If not, you can scp it over with scp /local/rails/dir remoteuser#remotehost:www/projectname.
At this point, you should actually do the remainder of the work on the server. Since you've managed to install Capistrano, I assume you're familiar with the basics of making your way around SSH.
Once the code's over, you have to install the prerequisites. If you're using 3.0.9 you should be able to run bundle install --deployment, where the deployment flag basically tells bundler to use the identical gem set as on your development machine.
When that's done, actually getting the server online will vary based on your setup. If you're using non-standalone passenger, just follow any of the many guides at this point. If you're running standalone passenger or thin or unicorn or any other standalone rails server, go ahead and start that in daemon mode (so it won't quit on you when you end your SSH session) and make sure you se the production flag. You can either start it in sudo and have it listen on port 80 (e.g., sudo thin start -d -p 80) or have it listen on a higher-number port and use a reverse proxy on your WWW-facing server. The instructions for how to reverse proxy are all over the internet.
Let me know if you have any questions.
You have half of a deployment solution with Capistrano. Commonly Passenger is used as the other half, which sits on the server and loads your app. To accomplish this, usually, SSH keys are used. There are numerous tutorials on how to set this up. One of my favorites written by Dan Benjamin can be found on his blog Hivelogic.
Edited to provide more begginer info:
Capistrano begginer's guide from the Capistrano wiki.
Passenger Stand Alone Guide from the Passenger website.
Be sure to check out the other guides for the webserver of your choice when you're ready.
These guides will give you the background you need to get a local Passenger & Capistrano deployment going. These guides provide the knowledge you need to get achieve what you want.
Simple and short sample of deployment via SSH http://alexeypetrushin.github.com/vfs/ssh_deployment.html
I am building an application that will only be run on a local network and am looking for the best way to restart my server from within the application itself. For the time being this is only running on Windows using WEBrick.
Look at Capistrano as others have suggested, it's fantastic :)
$ cap deploy
That's all you have to do. It'll grab the latest source from your git/SVN repo (lots more supported ofc), deploy, and restart your app server.