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ContainerPort in pod spec

List of ports to expose from the container. Exposing a port here gives the system additional information about the network connections a container uses, but is primarily informational. Not specifying a port here DOES NOT prevent that port from being exposed

targetPort in service spec

Number or name of the port to access on the pods targeted by the service. Number must be in the range 1 to 65535. Name must be an IANA_SVC_NAME. If this is a string, it will be looked up as a named port in the target Pod's container ports. If this is not specified, the value of the 'port' field is used (an identity map).

Hence targetPort in service needs to match the containerPort in pod spec because that's how service knows which container port is destination to forward the traffic to.

The Docker Compose command:, or everything in a docker run invocation after the image name, overrides the Dockerfile CMD.

If the image also has an ENTRYPOINT, the command you provide here is passed as arguments to the entrypoint in the same way the Dockerfile CMD does.

For a typical Compose setup you shouldn't need to specify a command:. In a Python/Flask context, the most obvious place it's useful is if you're also using a queueing system like Celery with the same shared code base: you can use command: to run a Celery worker off of the image you build, instead of a Flask application.

For your issue, you misunderstand the image azure-vote-front. You can the docker-compose.yaml file in the Github link your provide, it creates the azure-vote-front image, but it also needs the database Redis. So it's not a single container instance, it's the multiple containers.

You can need to create the image azure-vote-front and push it to the Azure Container Registry. Also does the image Redis. Then you can change the docker-compose.yaml file like this:

I had the same issue today and resolved it by installing VirtualBox as an additional step after installing Docker for Mac (I did so with brew cask install virtualbox)

I don't recall having to do the extra install previously, but maybe I already had VirtualBox already installed because of another tool (like Vagrant). Anyway, this is explained in the Docker Machine documentation:

If you are using Docker for Mac

Docker for Mac uses HyperKit, a lightweight macOS virtualization solution built on top of the Hypervisor.framework in macOS 10.10 Yosemite and higher.

Currently, there is no docker-machine create driver for HyperKit, so you will use virtualbox driver to create local machines. (See the Docker Machine driver for Oracle VirtualBox.) Note that you can run both HyperKit and Oracle VirtualBox on the same system. To learn more, see Docker for Mac vs. Docker Toolbox.

• Make sure you have the latest VirtualBox correctly installed on your system (either as part of an earlier Toolbox install, or manual install).

As far as I understand, You are trying to copy one text from file to another by omitting some lines such as new lines. Also, only trying to write only certain lines like 1,5,6

Below is correction while writing in another file,

It looks like that your Pod manifest is missing the following in the metadata section:

You aren't getting anything because the name of your Name property is in every child is different. To solve this, you should have the same name under each child like this:

You probably have the containers running in swarm mode. When you stop or delete a container, swarm mode will see the difference from the target state and redeploy containers to get you to the target state. To stop and delete containers started by swarm mode, you need to run stack and service commands instead:

There's a feature request pending for easier customization of the root folders. You might want to upvote it to give it more prominence.

For now, icon themes can style the root folder, as seen in the Minimal icon theme, so you could activate a different icon set that supports this, or create your own.