By Ben Dixon
Mastering Rails program deployment
This ebook will convey you from begin to end how to:
Setup a VPS from Scratch
Setup extra servers in minutes
Use Capistrano three to installation fast and reliably
Automate uninteresting upkeep tasks
If you've bought functions on Heroku that are costing you a fortune, it will give you the instruments you must circulate them onto a VPS. This comprises working a number of Rails purposes on a unmarried VPS - nice for small part projects.
If you're already working your app on a VPS however the installation approach is flaky - it occasionally doesn't restart or lots the incorrect model of the code - this booklet presents a template for making the method trouble free.
Section 1: Chef
How to automate provisioning new servers with chef. through the tip you'll be capable to get a brand new server up and able to use inside of minutes.
Many average Rails procedure configurations are supported out of the field with the instance code (MySQL, PostgreSQL, MongoDB and Redis). For anything, specific directions for constructing your individual customized configurations are supplied.
The objective of this part is to construct a re-usable blueprint you should use everytime you have to setup a brand new VPS.
Section 2: Capistrano 3
Using Capistrano three to automate each element of deployment, from updating code to dealing with resources and heritage workers.
Particular awareness is paid to establishing 0 downtime deployment - crucial if you're iterating swiftly and need to install numerous instances in keeping with day. This features a part on universal gotchas comparable to failing to reload the gemfile on deployment in addition to an in depth advisor to troubleshooting while it is going wrong.
I've spent 1000s of hours combing via weblog posts, documentation and tweaking config records. This has bought me to the degree the place deploying to a VPS is as effortless as - in truth frequently more uncomplicated than - deploying to Heroku. a good way to do an identical, this e-book will prevent loads of time.
Current of entirety & Feedback
The first part - provisioning a server with chef - is entire, together with directions for PostgreSQL, MySQL and MongoDB. This encompasses a "Five minute VPS" quickstart part for the impatient.
The moment part - deploying with Capistrano three - is additionally to be had and contains the entire info had to get 0 downtime deployments operating with Rails 3/4 and Unicorn. in addition to unique pattern code, it contains entire directions for deploying Sidekiq employees, an in depth part on Configuring 0 Downtime deployment and directions for configuring NGinx Virtualhosts and SSL
Over the following couple of months I'll be including extra chapters which move into element on backups and database administration in addition to enhancing the ebook according to the suggestions I've obtained up to now (please preserve this coming!). I'll additionally proceed so as to add additional chapters as and while I stumble upon new information and tricks.
Any suggestions on content material, constitution or corrections very gratefully obtained, you may get me on twitter (@talkingquickly) or utilizing the leanpub talk about button below.
Read or Download Reliably Deploying Rails Applications PDF
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Extra info for Reliably Deploying Rails Applications
Rb -cookbooks -data_bags -nodes -roles -site_cookbooks The Gemfile I recommend you replica the Gemfile from my_chef_projects into my_first_chef_repo. in the event you don’t, package deal exec from inside my_first_chef_repo will nonetheless paintings because it will simply use the Gemfile from the dad or mum listing yet you lose the pliability of specifying various gem models or extra gem stones in step with repository. knife. rb Knife is the command line software which permits us to engage with chef on our distant server. Knife solo provides additional instructions for interacting at once with the server we’re provisioning from our improvement pc (rather than through a significant chef server) knife. rb includes the knife configuration ideas that are particular to our repository. this can be extra vital whilst operating with a centralised chef server which we aren’t so for our reasons we’ll deal with this because the fundamental (and purely) configuration aspect for knife. Documentation for the whole variety of concepts to be had is at http://docs. opscode. com/config_rb_knife. html they key ones for us are: cookbook_path - this is often an array of paths relative to the foundation repository listing the place the cookbooks referenced in roles and/ or node definitions can be found. node_path - direction relative to the foundation of the repository the place node definitions are saved role_path - course relative to the basis listing the place function definitions are saved data_bag_path - direction relative to the basis listing the place data_bags are saved. commonly we will depart those at their default values. five. zero - Anatomy of a chef solo venture sixteen cookbooks vs site_cookbooks right here we’ll use the cookbooks listing to shop different peoples cookbooks which we set up utilizing Berkshelf (covered later) and site_cookbooks to include our personal customized cookbooks. It’s very important to not use cookbooks for none Berkshelf ones for the straightforward cause that it's wiped whenever we run knife solo prepare dinner! that suggests that any alterations we make in the following, aren't endured. subsequent we’ll examine the anatomy of anyone recipe. five. 1 - an easy Chef Cookbook review As we’ve coated, a chef cookbook is made of a set of recipes often on the subject of a selected package deal. during this instance we’ll gather a chef cookbook containing a unmarried recipe which installs and configures Redis. Cloning the Redis recipe commence via cloning the less than repository into the site_cookbooks folder of the chef repository we created within the past bankruptcy. https://github. com/TalkingQuickly/redis-tlq web site Cookbooks v Cookbooks As we observed within the prior bankruptcy, if we’re writing customized cookbooks, e. g. ones which aren't being put in instantly by means of Berkshelf (covered in 6. 1), those pass in site-cookbooks now not cookbooks. this is why the cookbooks at once is wiped and changed with the right kind models by way of Berkself whenever we provision. constitution of the Redis Recipe metadata. rb The metadata dossier includes information about what the cookbook can do, who it really is written by means of, its dependencies and the model. metadata. rb for our redis cookbook feels like this: 1 2 three four five identify maintainer maintainer_email description model "redis-tlq" "Ben Dixon" "ben@talkingquickly.