Deploy the application You’ve deployed the load balancer, the discovery backend, and a Swarm cluster so now you can build and deploy the voting application itself. You do this by starting a number of “Dockerized applications” running in containers. The diagram below shows the final application configuration including the overlay container network, voteapp. In this procedure you will connect containers to this network. The voteapp network is available to all Docker hosts using the Consul discov

Deploy your infrastructure In this step, you create several Docker hosts to run your application stack on. Before you continue, make sure you have taken the time to learn the application architecture. About these instructions This example assumes you are running on a Mac or Windows system and enabling Docker Engine docker commands by provisioning local VirtualBox virtual machines thru Docker Machine. For this evaluation installation, you’ll need 6 (six) VirtualBox VMs. While this example uses D

Delegations for content trust Docker Engine supports the usage of the targets/releases delegation as the canonical source of a trusted image tag. Using this delegation allows you to collaborate with other publishers without sharing your repository key (a combination of your targets and snapshot keys - please see “Manage keys for content trust” for more information). A collaborator can keep their own delegation key private. The targets/releases delegation is currently an optional feature - in or

Docker default bridge network With the introduction of the Docker networks feature, you can create your own user-defined networks. The Docker default bridge is created when you install Docker Engine. It is a bridge network and is also named bridge. The topics in this section are related to interacting with that default bridge network. Understand container communication Legacy container links Binding container ports to the host Build your own bridge Configure container DNS Customize the docker0

Customize the docker0 bridge The information in this section explains how to customize 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, the Docker server creates and configures the host system’s docker0 interface as an Ethernet bridge inside the Linux kernel that can pass packets back and forth between

Create a base image So you want to create your own Base Image? Great! The specific process will depend heavily on the Linux distribution you want to package. We have some examples below, and you are encouraged to submit pull requests to contribute new ones. Create a full image using tar In general, you’ll want to start with a working machine that is running the distribution you’d like to package as a base image, though that is not required for some tools like Debian’s Debootstrap, which you can

Control and configure Docker with systemd Many Linux distributions use systemd to start the Docker daemon. This document shows a few examples of how to customize Docker’s settings. Starting the Docker daemon Once Docker is installed, you will need to start the Docker daemon. $ sudo systemctl start docker # or on older distributions, you may need to use $ sudo service docker start If you want Docker to start at boot, you should also: $ sudo systemctl enable docker # or on older distributions, y

Controlling startup order in Compose You can control the order of service startup with the depends_on option. Compose always starts containers in dependency order, where dependencies are determined by depends_on, links, volumes_from and network_mode: "service:...". However, Compose will not wait until a container is “ready” (whatever that means for your particular application) - only until it’s running. There’s a good reason for this. The problem of waiting for a database (for example) to be re

Content trust in Docker When transferring data among networked systems, trust is a central concern. In particular, when communicating over an untrusted medium such as the internet, it is critical to ensure the integrity and the publisher of all the data a system operates on. You use Docker Engine to push and pull images (data) to a public or private registry. Content trust gives you the ability to verify both the integrity and the publisher of all the data received from a registry over any chan

Configure logging drivers The container can have a different logging driver than the Docker daemon. Use the --log-driver=VALUE with the docker run command to configure the container’s logging driver. If the --log-driver option is not set, docker uses the default (json-file) logging driver. The following options are supported: Driver Description none Disables any logging for the container. docker logs won’t be available with this driver. json-file Default logging driver for Docker. Writes JSON m