Docker Machine Overview You can use Docker Machine to: Install and run Docker on Mac or Windows Provision and manage multiple remote Docker hosts Provision Swarm clusters What is Docker Machine? Docker Machine is a tool that lets you install Docker Engine on virtual hosts, and manage the hosts with docker-machine commands. You can use Machine to create Docker hosts on your local Mac or Windows box, on your company network, in your data center, or on cloud providers like AWS or Digital Ocean.

Understand Machine concepts and get help Docker Machine allows you to provision Docker machines in a variety of environments, including virtual machines that reside on your local system, on cloud providers, or on bare metal servers (physical computers). Docker Machine creates a Docker host, and you use the Docker Engine client as needed to build images and create containers on the host. Drivers for creating machines To create a virtual machine, you supply Docker Machine with the name of the dri

Log Tags The tag log option specifies how to format a tag that identifies the container’s log messages. By default, the system uses the first 12 characters of the container id. To override this behavior, specify a tag option: docker run --log-driver=fluentd --log-opt fluentd-address=myhost.local:24224 --log-opt tag="mailer" Docker supports some special template markup you can use when specifying a tag’s value: Markup Description {{.ID}} The first 12 characters of the container id. {{.FullID}}

Link via an ambassador container Rather than hardcoding network links between a service consumer and provider, Docker encourages service portability, for example instead of: (consumer) --> (redis) Requiring you to restart the consumer to attach it to a different redis service, you can add ambassadors: (consumer) --> (redis-ambassador) --> (redis) Or (consumer) --> (redis-ambassador) ---network---> (redis-ambassador) --> (redis) When you need to rewire your consumer to talk

Link environment variables reference Note: Environment variables are no longer the recommended method for connecting to linked services. Instead, you should use the link name (by default, the name of the linked service) as the hostname to connect to. See the docker-compose.yml documentation for details. Environment variables will only be populated if you’re using the legacy version 1 Compose file format. Compose uses Docker links to expose services’ containers to one another. Each linked cont

Learn the application architecture On this page, you learn about the Swarm at scale example. Make sure you have read through the introduction to get an idea of the skills and time required first. Learn the example back story Your company is a pet food company that has bought a commercial during the Superbowl. The commercial drives viewers to a web survey that asks users to vote – cats or dogs. You are developing the web survey. Your survey must ensure that millions of people can vote concurrent

Legacy container links The information in this section explains legacy container links within the Docker default bridge. This is a bridge network named bridge created automatically when you install Docker. Before the Docker networks feature, you could use the Docker link feature to allow containers to discover each other and securely transfer information about one container to another container. With the introduction of the Docker networks feature, you can still create links but they behave dif

Journald logging driver The journald logging driver sends container logs to the systemd journal. Log entries can be retrieved using the journalctl command, through use of the journal API, or using the docker logs command. In addition to the text of the log message itself, the journald log driver stores the following metadata in the journal with each message: Field Description CONTAINER_ID The container ID truncated to 12 characters. CONTAINER_ID_FULL The full 64-character container ID. CONTAINE

IPv6 with Docker The information in this section explains IPv6 with the Docker default bridge. This is a bridge network named bridge created automatically when you install Docker. As we are running out of IPv4 addresses the IETF has standardized an IPv4 successor, Internet Protocol Version 6 , in RFC 2460. Both protocols, IPv4 and IPv6, reside on layer 3 of the OSI model. How IPv6 works on Docker By default, the Docker server configures the container network for IPv4 only. You can enable IPv4/I

Engine user guide This guide takes you through the fundamentals of using Docker Engine and integrating it into your environment. You’ll learn how to use Engine to: Dockerize your applications. Run your own containers. Build Docker images. Share your Docker images with others. And a whole lot more! This guide is broken into major sections that take you through learning the basics of Docker Engine and the other Docker products that support it. Dockerizing applications: A “Hello world” How do I