You created a new service named 'http' and discover it is not registering as healthy. Will this command enable you to view the list of historical tasks for this service?Solution: 'docker inspect http'
Answer(s): B
: = The `docker inspect' command returns low-level information on Docker objects, such as containers, images, networks, etc1 It does not show the list of historical tasks for a service. To view the list of tasks for a service, you need to use the `docker service ps' command 2. For example, to see the tasks for the `http' service, you would run `docker service ps http'. This would show the ID, name, image, node, desired state, current state, and error of each task 2.
Docker inspect | Docker Docs, Docker service ps | Docker Docs
You created a new service named 'http' and discover it is not registering as healthy. Will this command enable you to view the list of historical tasks for this service?Solution: 'docker service ps http'
Answer(s): A
= The command `docker service ps http' will list the tasks that are running as part of the `http' service, as well as the task history. The task history shows the previous states of the tasks, such as running, shutdown, rejected, etc. This can help you troubleshoot why the service is not registering as healthy, by looking at the current state, error, and ports of each task.
docker service ps | Docker DocsDocker Certified Associate GuideDCA Prep Guide
Will this action upgrade Docker Engine CE to Docker Engine EE?Solution: Delete '/var/lib/docker' directory.
Deleting the /var/lib/docker directory will not upgrade Docker Engine CE to Docker Engine EE. It will only remove all the data stored by Docker, such as images, containers, volumes, and networks. This can cause data loss and disrupt the running services. To upgrade from Docker Engine CE to Docker Engine EE, you need to follow the official instructions from Docker, which involve uninstalling the CE package and installing the EE package. You also need to have a valid license to use Docker Engine EE.
Upgrading Docker CE to EE for the Impatient -- Part IInstall Docker EngineMoving from docker ce to docker-EE - Stack Overflow
Will this action upgrade Docker Engine CE to Docker Engine EE?Solution: Uninstall 'docker-ce' package before installing 'docker-ee' package.
= Uninstalling the `docker-ce' package before installing the `docker-ee' package will not upgrade Docker Engine CE to Docker Engine EE. It will only remove the existing Docker Engine CE installation and install a new Docker Engine EE installation. This means that any existing containers, images, volumes, networks, and other Docker resources will be lost. To upgrade Docker Engine CE to Docker Engine EE without losing any data, you need to use the migration tool provided by Docker1 or follow the steps described in the Docker documentation2 or other online guides.
1: Migrate to Engine 1.10 | Docker Docs2: Install Docker Engine | Docker Docs3: Switching Docker 18.09 Community Edition to Enterprise Engine with no ...4: How to upgrade Docker 18.09 Community Edition to Docker Enterprise 18.09
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