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Its about creating and maintaining a clean environment. Conceptually they aren't that different than a VM just much lighter weight.

• chrisper 9y ago
  Well, we need to differentiate between application containers (Docker) and Linux containers (old:openVZ, new:LXD/LXC). Then there are application containers which are even more "limited," like Flatpack. I'd argue that only Linux containers are like VMs.
  • imhoguy 9y ago
    Docker was LXC wrapper in the past. Now it just handles cgroup stuff itself. You can run full system in the Docker but purists regard this as antipattern.
    • chrisper 9y ago
      I'd prefer LXD / LXC anyway. Sadly, LXD porting to Debian is a slow process.
• dozzie 9y ago
  Except that it's not clean environment. Make it a properly built DEB or RPM package, and then we're starting (but just starting) to talk about clean. Note also that binary packages help with repeatable deployment that uses Docker, deployment tools (e.g. Ansible or Salt), configuration management tools (CFEngine, Puppet), even manual -- and mix of all these. Docker images only help with Docker deployment.