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I'm still not grasping the concept of Docker and such... Can I use Deis (albeit in a much smaller scale) to quickly spin up lightweight VM-ish entitys for prot

I'm still not grasping the concept of Docker and such... Can I use Deis (albeit in a much smaller scale) to quickly spin up lightweight VM-ish entitys for prototyping new webapps/backends (i have an unused box at home), or am I coming at this from the wrong end :) (Link to a _good_ explanation of Docker, preferably a video ;), would be gratefully appreciated)

agilebyte 12y ago
The way I think about it: Docker - specify a config file and boom you have a VM with the system, the language, the libraries preinstalled Deis/Dokku - gives you tooling to deploy/stop/access apps on your VM with an easy cli
- wattengard 12y ago
  Ok.. But if I push 5 docker containers based on say Ubuntu 14.04, will they take 5 times the size of an Ubuntu 14.04 base install, or will they share base install?
  - agilebyte 12y ago
    They will share, and will spin up very fast, so size is not an issue.
  - bdcravens 12y ago
    They share much of the underlying OS.
  - agilebyte 12y ago
    A little Docker example I keep coming back to: https://github.com/radekstepan/im-runnable https://github.com/radekstepan/im-runnable It creates a little service that lets you run code (like Python, Node) in Docker sandboxed environment.
  - bacongobbler 12y ago
    this is more of a Docker than a Deis question, but a Docker image is composed of layers. Each tagged image keeps an ancestry list of all of the layers it requires. In your case, if you run 5 docker containers on the same host on top of ubuntu:14.04, it will initially pull the parent's layers (ubuntu:14.04), then it will pull its own layers. They all share the same layers, which is why it's so powerful. You get the exact same execution environment every time.
- Legogris 12y ago
  Key here is to realize the difference between VMs and LXC (which is what Docker builds on).
  - nickstinemates 12y ago
    Clarifying note: Docker uses libcontainer NY default for its execution engine. LXC is an option, not enabled by default.

agilebyte 12y ago

The way I think about it: Docker - specify a config file and boom you have a VM with the system, the language, the libraries preinstalled Deis/Dokku - gives you tooling to deploy/stop/access apps on your VM with an easy cli

wattengard 12y ago
Ok.. But if I push 5 docker containers based on say Ubuntu 14.04, will they take 5 times the size of an Ubuntu 14.04 base install, or will they share base install?
- agilebyte 12y ago
  They will share, and will spin up very fast, so size is not an issue.
- bdcravens 12y ago
  They share much of the underlying OS.
- agilebyte 12y ago
  A little Docker example I keep coming back to: https://github.com/radekstepan/im-runnable https://github.com/radekstepan/im-runnable It creates a little service that lets you run code (like Python, Node) in Docker sandboxed environment.
- bacongobbler 12y ago
  this is more of a Docker than a Deis question, but a Docker image is composed of layers. Each tagged image keeps an ancestry list of all of the layers it requires. In your case, if you run 5 docker containers on the same host on top of ubuntu:14.04, it will initially pull the parent's layers (ubuntu:14.04), then it will pull its own layers. They all share the same layers, which is why it's so powerful. You get the exact same execution environment every time.
Legogris 12y ago
Key here is to realize the difference between VMs and LXC (which is what Docker builds on).
- nickstinemates 12y ago
  Clarifying note: Docker uses libcontainer NY default for its execution engine. LXC is an option, not enabled by default.