12/17/2023 0 Comments Kitematic not default![]() If you want to know more about a specific machine or lookup a specific part of its configuration you can use the inspect subcommand. Any commands issued with the docker or docker-compose command line interfaces will connect with the daemon on the active machine. If you are using Docker Machine to run Docker locally you will have another entry in this list, and that entry will likely be marked as “active.” The active machine is the one that your environment is currently configured to communicate with. This command will list each machine, the driver it was created with, its state, and the URL where the Docker daemon can be reached. Use the ls subcommand to get a list of managed machines: docker-machine ls They describe the hosts you have created, the certificate authority certificates used to establish secure communications with the hosts, and a disk image used for VirtualBox based hosts.ĭocker Machine can be used to list, inspect, and upgrade your fleet as well. Docker Machine tracks these machines with a set of files in your home directory (under ~/.docker/machine/). docker-machine create -driver virtualbox host1ĭocker-machine create -driver virtualbox host2ĭocker-machine create -driver virtualbox host3Īfter you run these three commands (they can take a few minutes) you will have three Docker hosts managed by Docker Machine. Each command will create a new virtual machine on your computer. The next three commands will create three hosts using the VirtualBox driver. The first and most important thing to know how to do with Docker Machine is to create Docker hosts. If you want to learn more about the docker-machine command line you can always use the help command: docker-machine help Since all of these tools are all so similar in form and function, this section will make the introduction through a small set of examples. This section introduces commands for the Docker-Machine command line program. You can find detailed information about the driver specific flags by running the, “docker-machine help create” command or consulting online documentation. If you do decide to use a cloud provider for these examples, you will need to configure your environment with the provider specific information (like access key and secret key) as well as substitute driver specific flags in any commands in this article. At that point you’re only a few domain specific steps away from building real products. There is something powerful about knowing that the commands you’ll issue here are actually managing real world resources, and that the examples you will deploy are going to be running on the Internet. However, you should consider choosing a driver for your preferred cloud provider instead. Using a local virtual machine driver like VirtualBox will minimize the cost of running the examples in this article. There is no difference between a local and remote host from the perspective of a Docker client. Every cloud platform has its advantages and disadvantages. Each driver integrates Docker Machine with a different virtual machine technology or cloud-based virtual computing provider. Learning how to use this tool is essential for anyone that wants to learn how to use Docker in distributed cloud or local virtual environments.ĭocker Machine ships with a number of drivers out of the box. Docker Machine can create and tear down whole fleets of Docker enabled hosts in a matter of seconds. ![]() The first step in learning about and solving distributed systems problems is building a distributed system. This article is excerpted from Docker in Action by Jeff Nickoloff, published by Manning Publications.
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