Docker is an open platform for distributing software application in containers. It utilizes operating system-level virtualization for process and full resource isolation through cgroups, capabilities, SELinux, AppArmor, netfilter, and Linux kernel namespaces. Its libcontainer is based on libvirt and lxc. Docker Engine is the application and environment packaging tool. And Docker Hub is a cloud service for sharing prepackaged containers.
minor bugfix: IMPORTANT: On Linux distributions where `devicemapper` was the default storage driver, the `overlay2`, or `overlay` is now used by default (if the kernel supports it). To use devicemapper, you can manually configure the storage driver to use through the `--storage-driver` daemon option, or by setting "storage-driver" in the `daemon.json` configuration file. IMPORTANT: In Docker 1.13, the managed plugin api changed, as compared to the experimental. version introduced in Docker 1.12. You must uninstall plugins which you installed with Docker 1.12 _before_ upgrading to Docker 1.13. You can uninstall plugins using the `docker plugin rm` command. If you have already upgraded to Docker 1.13 without uninstalling. previously-installed plugins, you may see this message when the Docker daemon starts: Error starting daemon: json: cannot unmarshal string into Go value of type types.PluginEnv. To manually remove all plugins and resolve this problem, take the following steps: 1. Remove plugins.json from: `/var/lib/docker/plugins/`. 2. Restart Docker. Verify that the Docker daemon starts with no errors. 3. Reinstall your plugins. Contrib: Do not require a custom build of tini. Upgrade to Go 1.7.5. ### Remote API (v1.26) Client. Support secrets in docker stack deploy with compose file. Runtime: size in `docker system df`. error on `docker inspect` when Swarm certificates were expired.. deadlock on v1 plugin with activate error. SELinux regression. Plugins: Support global scoped network plugins (v2) in swarm mode. Add `docker plugin upgrade`. Windows: small regression with old plugins in Windows. warning on Windows.