DCA Exam Dumps : Docker Certified Associate (DCA) Exam

Docker Universal Control Plane (UCP) has its own built-in authentication mechanism and integrates with LDAP services1.It also has role-based access control (RBAC), so that you can control who can access and make changes to your cluster and applications1.However, there is no mention of Docker ID being a supported user authentication method for UCP in the resources provided1234.

= Docker will block this command if you configure the local Docker engine to enforce content trust by setting the environment variable DOCKER_CONTENT_TRUST=1. This means that you can only pull, run, or build with trusted images that have been signed using Docker Content Trust (DCT)1. DCT is a feature that allows you to use digital signatures to verify the integrity and the publisher of specific image tags2. If myorg/myimage:1.0 is unsigned, it means that it does not have a valid signature from the image publisher or a trusted delegate. Therefore, Docker will not allow you to build an image from a Dockerfile that begins with FROM myorg/myimage:1.0, as it cannot verify the source or the content of the base image. You will get an error message like this:

No valid trust data for 1.0

To avoid this error, you need to either disable DCT by setting DOCKER_CONTENT_TRUST=0, or use a signed image tag as the base image in your Dockerfile3. References:

Content trust in Docker | Docker Docs

Docker Content Trust: What It Is and How It Secures Container Images

Automation with content trust | Docker Docs

The strategy will not successfully accomplish mounting the /data directory on your laptop into a container. The containers. Mounts. hostBinding: /data is not a valid syntax for specifying a bind mount in a Kubernetes container specification. According to the Kubernetes documentation), the correct way to mount a host directory into a container is to use a hostPath volume, which takes a path parameter that specifies the location on the host. For example, to mount the /data directory on your laptop into a container at /var/data, you can use the following YAML snippet:

spec:

containers:

-name:my-container

image:my-image

volumeMounts:

-name:data-volume

mountPath:/var/data

volumes:

-name:data-volume

hostPath:

path:/data

Volumes), Use bind mounts)