What if as a consultant or freelancer with 10 Rails projects, you had everything you needed isolated for each project without needing to waste precious SSD disk space? What if you could develop your Rails application in isolation on your work station without using RVM or chruby, and changing Ruby versions were super easy? Docker is very lightweight-it typically takes a few milliseconds for a container to start, and running a container doesn’t use much disk space at all. It also takes many seconds to boot-up a virtual machine, and each VM can potentially be gigabytes in size.ĭocker containers share your host’s kernel, and isolation is done using cgroups and other linux kernel libraries.
They allow you to isolate services, but there are a few major differences that make virtual machines much less efficient.įor starters, you need to have an entire guest operating system for each application you want to isolate.
You may have used Vagrant, VirtualBox, or VMWare to run a virtual machine. What Makes Docker Different from a Virtual Machine
RAILS MASTER KEY GENERATE INSTALL
The Docker image contains the code, runtime, system libraries and anything else you would install on a server to make it run if you weren’t using Docker. This unit is typically labeled as a Docker image.Įverything the application needs to run is included. TomFern / dockerizing-ruby What is Docker?ĭocker allows you to package up an application or service with all of its dependencies into a standardized unit.
0 kommentar(er)
