The primary difference is that Docker as a project is focused on the runtime container only, whereas OpenShift (as a system) includes both the runtime container as well as the REST API, coordination, and web interfaces to deploy and manage individual containers. Comparing just the runtime containers, OpenShift and Docker both use kernel isolation features … Read more
I just downloaded Docker Toolbox for Windows 10 64bit today. I’m going through the tutorial. I’m receving the following error when trying to build an image using a Dockerfile. Steps: Launched Docker Quickstart terminal. testdocker after creating it. Prepare Dockerfile as documented in “Build your own image” web link ran below command docker build -t … Read more
cPickle comes with the standard library… in python 2.x. You are on python 3.x, so if you want cPickle, you can do this: However, in 3.x, it’s easier just to use pickle. No need to install anything. If something requires cPickle in python 3.x, then that’s probably a bug.
A “reference” in docker is a pointer to an image. It may be an image name, an image ID, include a registry server in the name, use a sha256 tag to pin the image, and anything else that can be used to point to the image you want to run. The invalid reference format error message means … Read more
In order to copy a file from a container to the host, you can use the command Here’s an example: Here goofy_roentgen is the container name I got from the following command: You can also use (part of) the Container ID. The following command is equivalent to the first
The Docker machine is running. But you need to export some environment to connect to the Docker machine. By default, the docker CLI client is trying to communicate to the daemon using http+unix://var/run/docker.sock (as shown in the error message). Export the correct environment variables using eval $(docker-machine env dev) and then try again. You can also just run docker-machine env dev to see … Read more
If you want to run docker as non-root user then you need to add it to the docker group. Create the docker group if it does not exist Add your user to the docker group. Run the following command or Logout and login again and run (that doesn’t work you may need to reboot your … Read more
Edit Windows Version in Registry Press Windows + R and write regedit In the Registry Editor, go to \HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion Right-click on EditionID and Click Modify Change Value Data to “Professional” Press OK. Install Docker After the installation, you can change the EditionID back to “Core”
or Tags are just human-readable aliases for the full image name (d583c3ac45fd…). So you can have as many of them associated with the same image as you like. If you don’t like the old name you can remove it after you’ve retagged it: That will just remove the alias/tag. Since d583c3ac45fd has other names, the actual image won’t … Read more
There’s a –no-cache option: In older versions of Docker you needed to pass –no-cache=true, but this is no longer the case.