Networking in Compose Note: This document only applies if you’re using version 2 of the Compose file format. Networking features are not supported for version 1 (legacy) Compose files. By default Compose sets up a single network for your app. Each container for a service joins the default network and is both reachable by other containers on that network, and discoverable by them at a hostname identical to the container name. Note: Your app’s network is given a name based on the “project name

Network containers If you are working your way through the user guide, you just built and ran a simple application. You’ve also built in your own images. This section teaches you how to network your containers. Name a container You’ve already seen that each container you create has an automatically created name; indeed you’ve become familiar with our old friend nostalgic_morse during this guide. You can also name containers yourself. This naming provides two useful functions: You can name conta

Bind container ports to the host The information in this section explains binding container ports within the Docker default bridge. This is a bridge network named bridge created automatically when you install Docker. Note: The Docker networks feature allows you to create user-defined networks in addition to the default bridge network. By default Docker containers can make connections to the outside world, but the outside world cannot connect to containers. Each outgoing connection will appear

Docker networks feature overview This sections explains how to use the Docker networks feature. This feature allows users to define their own networks and connect containers to them. Using this feature you can create a network on a single host or a network that spans across multiple hosts. Understand Docker container networks Work with network commands Get started with multi-host networking If you are already familiar with Docker’s default bridge network, docker0 that network continues to be

Migrate to Engine 1.10 Starting from version 1.10 of Docker Engine, we completely change the way image data is addressed on disk. Previously, every image and layer used a randomly assigned UUID. In 1.10 we implemented a content addressable method using an ID, based on a secure hash of the image and layer data. The new method gives users more security, provides a built-in way to avoid ID collisions and guarantee data integrity after pull, push, load, or save. It also brings better sharing of lay

Migrate from Boot2Docker to Docker Machine If you were using Boot2Docker previously, you have a pre-existing Docker boot2docker-vm VM on your local system. To allow Docker Machine to manage this older VM, you must migrate it. Open a terminal or the Docker CLI on your system. Type the following command. $ docker-machine create -d virtualbox --virtualbox-import-boot2docker-vm boot2docker-vm docker-vm Use the docker-machine command to interact with the migrated VM. Subcommand comparison The d

Microsoft Hyper-V Creates a Boot2Docker virtual machine locally on your Windows machine using Hyper-V. See here for instructions to enable Hyper-V. You will need to use an Administrator level account to create and manage Hyper-V machines. Note: You will need an existing virtual switch to use the driver. Hyper-V can share an external network interface (aka bridging), see this blog. If you would like to use NAT, create an internal network, and use Internet Connection Sharing. $ docker-machine c

Microsoft Azure You will need an Azure Subscription to use this Docker Machine driver. Sign up for a free trial. NOTE: This documentation is for the new version of the Azure driver, which started shipping with v0.7.0. This driver is not backwards-compatible with the old Azure driver. If you want to continue managing your existing Azure machines, please download and use machine versions prior to v0.7.0. Authentication The first time you try to create a machine, Azure driver will ask you to aut

Manage keys for content trust Trust for an image tag is managed through the use of keys. Docker’s content trust makes use of five different types of keys: Key Description root key Root of content trust for an image tag. When content trust is enabled, you create the root key once. Also known as the offline key, because it should be kept offline. targets This key allows you to sign image tags, to manage delegations including delegated keys or permitted delegation paths. Also known as the reposito

Manage data in containers So far you’ve been introduced to some basic Docker concepts, seen how to work with Docker images as well as learned about networking and links between containers. In this section you’re going to learn how you can manage data inside and between your Docker containers. You’re going to look at the two primary ways you can manage data with Docker Engine. Data volumes Data volume containers Data volumes A data volume is a specially-designated directory within one or more