You can access your Docker Cloud account from within Docker for Mac. From the Docker for Mac menu, sign in to Docker Cloud with your Docker ID, or create one. Then use the Docker for Mac menu to create, view, or navigate directly to your Cloud resources, including. On Mac, you can use the native browser Safari, for which you can toggle the full-screen mode by clicking on the green circle at the top-left corner of Safari or selecting the View --> 'Enter Full Screen' menu. To exit the full-screen mode, press Ctrl-Cmd-f, or slide your mouse to the top of the display to enable the menus.
$ docker Usage: docker OPTIONS COMMAND ARG. docker -help -v -version A self-sufficient runtime for containers.
Docker -config /testconfigs/ ps Instructs Docker to use the configuration files in your /testconfigs/ directory when running the ps command. Docker manages most of the files in the configuration directory and you should not modify them. However, you can modify the config.json file to control certain aspects of how the docker command behaves.
Currently, you can modify the docker command behavior using environment variables or command-line options. You can also use options within config.json to modify some of the same behavior. When using these mechanisms, you must keep in mind the order of precedence among them. Command line options override environment variables and environment variables override properties you specify in a config.json file. The config.json file stores a JSON encoding of several properties: The property HttpHeaders specifies a set of headers to include in all messages sent from the Docker client to the daemon. Docker does not try to interpret or understand these header; it simply puts them into the messages.
Docker does not allow these headers to change any headers it sets for itself. The property psFormat specifies the default format for docker ps output. When the -format flag is not provided with the docker ps command, Docker’s client uses this property. If this property is not set, the client falls back to the default table format. For a list of supported formatting directives, see the The property imagesFormat specifies the default format for docker images output. When the -format flag is not provided with the docker images command, Docker’s client uses this property. If this property is not set, the client falls back to the default table format.
For a list of supported formatting directives, see the The property pluginsFormat specifies the default format for docker plugin ls output. When the -format flag is not provided with the docker plugin ls command, Docker’s client uses this property. If this property is not set, the client falls back to the default table format.
For a list of supported formatting directives, see the The property servicesFormat specifies the default format for docker service ls output. When the -format flag is not provided with the docker service ls command, Docker’s client uses this property. If this property is not set, the client falls back to the default json format. For a list of supported formatting directives, see the The property serviceInspectFormat specifies the default format for docker service inspect output. When the -format flag is not provided with the docker service inspect command, Docker’s client uses this property. If this property is not set, the client falls back to the default json format. For a list of supported formatting directives, see the The property statsFormat specifies the default format for docker stats output.
When the -format flag is not provided with the docker stats command, Docker’s client uses this property. If this property is not set, the client falls back to the default table format.
For a list of supported formatting directives, see The property secretFormat specifies the default format for docker secret ls output. When the -format flag is not provided with the docker secret ls command, Docker’s client uses this property. If this property is not set, the client falls back to the default table format. For a list of supported formatting directives, see The property nodesFormat specifies the default format for docker node ls output. When the -format flag is not provided with the docker node ls command, Docker’s client uses the value of nodesFormat.
If the value of nodesFormat is not set, the client uses the default table format. For a list of supported formatting directives, see the The property configFormat specifies the default format for docker config ls output. When the -format flag is not provided with the docker config ls command, Docker’s client uses this property. If this property is not set, the client falls back to the default table format. For a list of supported formatting directives, see The property credsStore specifies an external binary to serve as the default credential store. When this property is set, docker login will attempt to store credentials in the binary specified by docker-credential- which is visible on $PATH.
If this property is not set, credentials will be stored in the auths property of the config. For more information, see the The property credHelpers specifies a set of credential helpers to use preferentially over credsStore or auths when storing and retrieving credentials for specific registries. If this property is set, the binary docker-credential- will be used when storing or retrieving credentials for a specific registry. For more information, see the The property stackOrchestrator specifies the default orchestrator to use when running docker stack management commands. Valid values are 'swarm', 'kubernetes', and 'all'. This property can be overridden with the DOCKERSTACKORCHESTRATOR environment variable, or the -orchestrator flag. Once attached to a container, users detach from it and leave it running using the using CTRL-p CTRL-q key sequence.
This detach key sequence is customizable using the detachKeys property. Specify a value for the property. The format of the is a comma-separated list of either a letter a-Z, or the ctrl- combined with any of the following:. a-z (a single lowercase alpha character ). @ (at sign). (left bracket). (two backward slashes).
(underscore). ^ (caret) Your customization applies to all containers started in with your Docker client. Users can override your custom or the default key sequence on a per-container basis. To do this, the user specifies the -detach-keys flag with the docker attach, docker exec, docker run or docker start command. Following is a sample config.json file. $ docker run -help Usage: docker run OPTIONS IMAGE COMMAND ARG.
Run a command in a new container Options: -add-host value Add a custom host-to-IP mapping (host:ip) (default ) -a, -attach value Attach to STDIN, STDOUT or STDERR (default ). Option types Single character command line options can be combined, so rather than typing docker run -i -t -name test busybox sh, you can write docker run -it -name test busybox sh.
Boolean Boolean options take the form -d=false. The value you see in the help text is the default value which is set if you do not specify that flag. If you specify a Boolean flag without a value, this will set the flag to true, irrespective of the default value. For example, running docker run -d will set the value to true, so your container will run in “detached” mode, in the background. Options which default to true (e.g., docker build -rm=true) can only be set to the non-default value by explicitly setting them to false.
In this post, we are sharing Docker image for OpenCV 3.4.3, and the recently released OpenCV 3.4.4 and OpenCV 4.0. In addition to OpenCV, the image also has dlib and a Facial Landmark Detection example code. Every day we receive a few emails and comments on our posts about OpenCV and Dlib installation. Even with the detailed and tested instructions, sometimes it is tough for people to get a system up and running. So, we have been thinking of providing a solution for people who have struggled with installation issues.
One way to solve this problem is to provide a Virtual Machine (VM) with all the libraries installed. A huge downside of using a VM is the large file people need to download. Sometimes it can be 10s of GBs. A smarter and newer way to solve this problem is to provide a Docker image. Typically a Docker image size is much smaller than a VM. Our Docker image, for example, is just 1 GB in size (compressed size).
In addition, it starts much faster than a VM and typically runs applications much faster compared to a VM. Docker is just one of those minimal things that can make your life exceedingly simple. Also, as we’ll see, the same docker image can be used on Windows, Ubuntu and MacOS. If you are stuck with OpenCV installation or if you want to try out the new OpenCV-3.4.4 and OpenCV-4.0 ( released on 20th November 2018 ), without actually installing it on your system, this docker image is the perfect match for you.
This post is split into five sections. Section 1: How to install Docker on Linux, MacOS and Windows. Section 2: How to use Docker image for OpenCV. This image also comes with dlib pre-installed. Section 3: How to run Facial Landmark Detection demo code on Docker Image. Section 4: How to make changes to a Docker image. Docker Installation In this section, we will learn how to install Docker on Ubuntu, MacOS, and Windows.
The docker image has been updated to enable X11-Forwarding and now also contain an example to test installation. Use docker pull to get the latest image. To use the docker image, use the following instructions: docker pull spmallick/opencv-docker:opencv Once, the image is downloaded, we can start it using the following command docker run -device=/dev/video0:/dev/video0 -v /tmp/.X11-unix:/tmp/.X11-unix -e DISPLAY=$DISPLAY -p 5000:5000 -p 8888:8888 -it spmallick/opencv-docker:opencv /bin/bash Let’s take a moment to examine this command in detail:.
–device=/dev/video0:/dev/video0 allows use of webcam.v /tmp/.X11-unix:/tmp/.X11-unix helps in X11 forwarding so that we can use functions like cv::imshow.e is used to pass an environment variable.it starts an interactive session.p sets up a port forward. This flag maps the container’s port to a port on the host system. /bin/bash runs.bashrc file on startup The image has OpenCV 3.4.3 installed in /usr/local, OpenCV 3.4.4 in /installation/OpenCV-3.4.4 and OpenCV 4.0.0 in /installation/OpenCV-master. By default, whatever changes you make in your docker image are NOT saved. To commit changes made to the docker image, we need to follow the steps below.
We will refer to the image of the terminal below as an example. Find the Container ID: The easiest way to find it out is to note the text following in your docker container. For example, in the image above, the docker container ID is 56a07cf4614c. Also, note that Container ID will vary every time you use docker run to create a new container. Make a change: In the example above, we create a simple file HelloUser.sh that outputs some text when run from the command line. Exit: Once the changes have been made, we need to exit the container using exit command.
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