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description keywords landing title notoc
Home page for Docker's documentation
Docker, documentation, manual, guide, reference, api, samples
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Docker Documentation
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{% assign page.title = site.name %}

Docs Hackathon, April 17-22nd, 2017

Docker Docs Hackathon, April 17-22nd, 2017

Earn rewards for fixing bugs in our documentation! Participate online, and/or visit us at DockerCon in the fourth floor hack room. Convert your participation points into swag. Happening all DockerCon week!

Hackathon details{: class="button outline-btn" style="margin-bottom:20px"}

Introduction to Docker

Docker packages your app with its dependencies, freeing you from worrying about your system configuration, and making your app more portable.

{% if site.edge == true %} {% capture ce-edge-section %}

Docker CE Edge

The Docker CE Edge channel provides monthly releases which allow you to try new features of Docker and verify bug fixes quickly. Edge releases are only supported for one month, and a given Edge release will not receive any updates once a new edge release is available.

Stable releases are not published to the Edge channel, so Linux repository users still need to subscribe to the Stable channel as well.

Commercial support is not available for Docker CE.

For information about all Docker release channels and expectations about support, see Docker channels.

Read more about Docker CE Edge releases

This page lists features that are only available in Docker CE Edge releases. Where applicable, the API and CLI reference documentation has been updated to reflect these features, but full documentation for a given feature may not be available until a Docker CE Stable release incorporates the feature.

Docker CE Edge new features

  • 17.04

Docker CE Edge 17.04

The following major features and changes are included in Docker CE Edge 17.04. Continue reading, or go straight to API and CLI, Daemon, Dockerfile, Services, or Stacks.

Read the full release notes{: target="blank" class="" }

API and CLI

  • Add --device-cgroup-rule flag to give containers access to devices that appear after the container is started. {% include github-pr.md pr=22563 %}

  • Allow swarm nodes to join with --availability=drain to prevent them from taking non-manager workloads. {% include github-pr.md pr=24993 %}

  • Add publish and expose filters to docker ps, so that containers can be filtered by port or port range for TCP or UDP protocols {% include github-pr.md pr=27557 %}

  • Add --no-trunc and --format flags to the docker service ls command, and as well as the ability to specify the default format for docker service ls using the ServicesFormat option to the Docker CLI. Also add a docker stack services command. {% include github-pr.md pr=28199 %}

  • Add ability to filter plugins by whether they are enabled or disabled in docker plugin ls output. {% include github-pr.md pr=28627 %}

  • Add mode option to --log-opts flag for both docker and dockerd. If set to non-blocking, and the log buffer fills up, log messages will be lost, but the container will not block. The max-buffer-size option controls the maximum size of the ring buffer. Defaults to blocking, which will cause the container to block if messages cannot be logged. See Options for all drivers. {% include github-pr.md pr=28762 %}

  • It is no longer possible to inadvertently pull images on an architecture where they will not run. {% include github-pr.md pr=29001 %}

  • It is now possible to create AWS log groups when using the AWS logging driver. See awslogs-create-group. {% include github-pr.md pr=29504 %}

  • Add the ability to filter docker network ls output by creation time, using the {% raw %}{{CreatedAt}}{% endraw %} format specifier. {% include github-pr.md pr=29900 %}

  • Named but untagged images are now removed if you run docker image prune if --dangling-only is set to true. {% include github-pr.md pr=30330 %}

  • Add --add-host flag to docker build, which will add entries to the /etc/hosts file of a container created from that image. The /etc/hosts file is not saved within the image itself. {% include github-pr.md pr=30383 %}

  • Prevent docker network ls from pulling all the endpoints, to reduce impact on the network. {% include github-pr.md pr=30673 %}

  • Windows-specific commands and options no longer show in command help text on non-Windows clients. {% include github-pr.md pr=30780 %}

  • When you specify an IP address when running docker network connect, the IP address is now checked for validity. {% include github-pr.md pr=30807 %}

  • Add the ability to customize bind-mount consistency to be more appropriate for some platforms and workloads. Options are consistent (the default), cached, or delegated. {% include github-pr.md pr=31047 %}

Daemon

  • Docker Daemon logging settings no longer affect the docker build command. {% include github-pr.md pr=29552 %}

  • Add a registry-mirrors configuration option for the Docker daemon, which replaces the daemon's registry mirrors with a new set of registry mirrors. {% include github-pr.md pr=29650 %}

  • Add the ability to specify the default shared memory size for the Docker daemon, using the --default-shm-size or the default-shm-size key in daemon.json. {% include github-pr.md pr=29692 %}

  • Add a no-new-privileges configuration option for the Docker daemon, which prevents unprivileged containers from gaining new privileges. {% include github-pr.md pr=29984 %}

  • If a Docker client communicates with an older daemon and attempts to perform an operation not supported by the daemon, an error is printed, which shows the API versions of both the client and daemon. {% include github-pr.md pr=30187 %}

  • The Docker daemon no longer depends upon sqlite. This change means that it is not possible to upgrade the Docker daemon from version 1.9 directly to the latest version. It is recommended to upgrade from one major version to the next, in sequence. {% include github-pr.md pr=30208 %}

Dockerfile

  • Using the pattern **/ in a Dockerfile now (correctly) behaves the same as **. {% include github-pr.md pr=29043 %}

  • Time values less than 1 second are no longer allowed in health-check options in the Dockerfile. {% include github-pr.md pr=31177 %}

Services

  • When a service is updated with both --secret-add and --secret-rm in the same operation, the order of operations is now changed so that the --secret-rm always occurs first. {% include github-pr.md pr=29802 %}

  • Add the ability to create or update a service to be read-only using the --read-only flag. {% include github-pr.md pr=30162 %}

  • Docker now updates swarm nodes if the swarm configuration is updated. {% include github-pr.md pr=30259 %}

  • Add topology-aware placement preferences for Swarm services. This feature allows services to be balanced over nodes based on a particular user-defined property, such as which datacenter or rack they are located in. See Control service scale and placement. {% include github-pr.md pr=30725 %}

  • Add the ability to customize the stop signal which will be sent to nodes, when creating or updating a service. {% include github-pr.md pr=30754 %}

  • Add the ability to address a secret by name or prefix, as well as ID, when updating it. {% include github-pr.md pr=30856 %}

  • Add the ability to roll back to a previous version of a service if an updated service fails to deploy. Several flags are available at service creation or update,to control the rollback action, failure threshold, monitoring delay, rollback delay, and parallelism. {% include github-pr.md pr=31108 %}

  • Add the ability to specify the stream when using the Docker service logs API. {% include github-pr.md pr=31313 %}

  • Add --tail and --since flags to docker service logs command, to filter the logs by time or to show the tail of the logs and show new content as it is logged. {% include github-pr.md pr=31500 %}

  • Add a --verbose flag to the docker inspect command. For swarm networks, this flag shows all nodes and services attached to the network. {% include github-pr.md pr=31710 %}

Stacks
  • Compose file version 3.2 is now supported. This includes support for different types of endpoints and expands the options you can use when specifying mounts. {% include github-pr.md pr=31795 %}
{% endcapture %} {{ ce-edge-section | markdownify }} {% endif %}
### Learn Docker basics

Get started learning Docker concepts, tools, and commands. The examples show you how to build, push, and pull Docker images, and run them as containers. This tutorial stops short of teaching you how to deploy applications.

Start the basic tutorial{: class="button outline-btn"}

### Define and deploy apps in Swarm Mode

Learn how to relate containers to each other, define them as services, and configure an application stack ready to deploy at scale in a production environment. Highlights Compose Version 3 new features and swarm mode.

Start the application tutorial{: class="button outline-btn"}

Components

Docker for Mac

A native application using the macOS sandbox security model which delivers all Docker tools to your Mac.

Docker for Windows

A native Windows application which delivers all Docker tools to your Windows computer.

Docker for Linux

Install Docker on a computer which already has a Linux distribution installed.

Docker Editions

Platform matrix and superset of installers for Docker for desktops, servers, or cloud providers.

Docker Compose

Define application stacks built using multiple containers, services, and swarm configurations.

Docker Machine

Automate container provisioning on your network or in the cloud. Available for Windows, macOS, or Linux.

Docker Cloud

A hosted service for building, testing, and deploying Docker images to your hosts.

Docker Universal Control Plane

(UCP) Manage a cluster of on-premise Docker hosts like a single machine with this enterprise product.

Docker Trusted Registry

(DTR) An enterprise image storage solution you can install behind a firewall to manage images and access.