DCA Exam Dumps and Practice Questions

Deleting the/var/lib/dockerdirectory 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.Reference:

Upgrading Docker CE to EE for the Impatient --- Part I

Install Docker Engine

Moving from docker ce to docker-EE - Stack Overflow

= Creating a collection for each application is not a way to accomplish this.A collection is a term used by Ansible to describe a package of related content that can be used to automate the management of Kubernetes resources1. A collection is not a native Kubernetes concept and does not group resources together within the cluster. To group Kubernetes-specific resources, such as secrets, for each application, you need to use namespaces.A namespace is a logical partition of the cluster that allows you to isolate resources and apply policies to them2. You can create a namespace for each application and store the secrets and other resources in that namespace. This way, you can prevent conflicts and limit access to the resources of each application.To create a namespace, you can use the kubectl create namespace command or a yaml file2.To create a secret within a namespace, you can use the kubectl create secret commandwith the --namespace option or a yaml file with the metadata.namespace field3.Reference:

Kubernetes Collection for Ansible - GitHub

Namespaces | Kubernetes

Secrets | Kubernetes

Managing Secrets using kubectl | Kubernetes

A DTR security scan will detect licenses for known third party binary components.This is because DTR security scan uses a database of vulnerabilities and licenses that is updated regularly from Docker Server1.DTR security scan can identify the components and versions of the software packages that are present in the image layers, and report any known vulnerabilities or licenses associated with them2.This can help users to comply with the licensing requirements and avoid potential legal issues3.Reference:

Set up vulnerability scans | Docker Docs

Scan images for vulnerabilities | Docker Docs

Container Security 101 --- Scanning images for Vulnerabilities

= The commanddocker network create -d overlay --secure <network-name>will not ensure that overlay traffic between service tasks is encrypted.The--secureoption is not a valid flag for thedocker network createcommand1.To enable encryption for an overlay network, you need to use the--opt encryptedflag instead23.This will create IPSEC tunnels between the nodes where the service tasks are scheduled, using the AESalgorithm in GCM mode2.You can verify if an overlay network is encrypted by checking if the IPSEC tunnels were created using tools likenetstat4.Reference:

1: docker network create | Docker Docs

2: Encrypt traffic on an overlay network | Docker Docs

3: Overlay network driver | Docker Docs

4: Docker: How to verify if an overlay network is encrypted - Stack Overflow

= The commanddocker logs <container-id>will not configure a Docker container to export container logs to the logging solution, such as Splunk.This command only displays the logs of a specific container in the standard output or a file, but does not send them to any external system1.To export container logs to Splunk, you need to use the Docker Logger Drivers, which are plugins that provide logging capabilities for Docker containers2.The Splunk logging driver sends container logs to HTTP Event Collector in Splunk Enterprise and Splunk Cloud3.To use the Splunk logging driver for a specific container, you need to use the command-line flags--log-driverand--log-optwithdocker run, and provide the Splunk token and URL as options3. For example:

$ docker run --log-driver=splunk --log-opt splunk-token=VALUE --log-opt splunk-url=VALUE ...

:

docker logs | Docker Documentation

Logging drivers | Docker Documentation

Splunk logging driver | Docker Documentation