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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Orchestration | 25% | - Describe how a Dockerized application communicates with legacy systems - Convert an application deployment into a stack file using a YAML compose file with "docker stack deploy" - State the differences between running a container vs running a service - Mount volumes - Manipulate a running stack of services - Interpret the output of "docker inspect" commands - Describe the difference between global and replicated services - Describe and demonstrate how to use replication mode - Increase number of replicas - Complete the setup of a swarm mode cluster - Demonstrate steps to lock a swarm cluster - Describe how to provide configuration to Kubernetes pods using configMaps and secrets - Identify the steps needed to troubleshoot a service not deploying - Describe how to deploy containerized workloads as Kubernetes pods and deployments - Add networks, publish ports - Extend the instructions to run individual containers into running services under swarm |
| Topic 2: Installation and Configuration | 15% | - Setup swarm, configure managers, add nodes, and setup the backup schedule - Demonstrate the ability to upgrade the Docker engine - Complete setup of repo, select a storage driver, and complete installation of Docker engine on multiple platforms - Configure logging drivers (splunk, journald, etc.) - Outline the sizing requirements prior to installation - Describe the use of UCP (Universal Control Plane) - Create and manager user and teams - Describe the interaction between Docker and Linux - Use the install command to install DTR (Docker Trusted Registry) - Describe namespaces, cgroups, and configuration of certificates - Interpret errors to troubleshoot installation issues without assistance |
| Topic 3: Networking | 15% | - Create a Docker bridge network for a developer to use for their containers - Understand the Container Network Model and how it interfaces with the Docker engine and network and IPAM drivers - Describe how to install a remote driver to a specific infrastructure provider - Configure Docker to use external DNS - Troubleshoot container and engine logs to understand a connectivity issue between containers - Describe the different types and use cases for the built-in network drivers - Describe the differences between "host" and "ingress" port publishing mode - Identify which IP and port a container is externally accessible on - Publish a port so that an application is accessible externally |
| Topic 4: Image Creation, Management, and Registry | 20% | - Describe the use of Dockerfile - Give examples on how to create an efficient image via a Dockerfile - Describe options, such as add, copy, volumes, expose, entry point - Utilize a registry to store an image - Identify and display the main parts of a Dockerfile - Apply a file to create a new image - Use CLI commands such as list, delete, prune, rmi, etc. to manage images - Describe how to set up and use a local registry - Demonstrate tagging an image - Describe how an image registry works - Inspect images and report specific attributes using filter and format - Describe how image layers work - Display layers of a Docker image |
| Topic 5: Storage and Volumes | 10% | - Describe the different graph driver storage backends - Describe the storage models available for DTR (NFS, local) - Identify the steps to take to clean up unused images on a filesystem and DTR - Describe how volumes work with containers - Describe how to use a volume plugin (local vs. NFS) - Describe the use of tmpfs for ephemeral storage |
| Topic 6: Security | 15% | - Describe MTLS - Compare the UCP workers and managers - Describe identity roles - Describe swarm default security - Describe the difference between UCP and DTR - Describe UCP and DTR integration with LDAP/AD - Describe default engine security - Describe the security architecture and responsibilities of the Docker EE platform - Configure RBAC with UCP - Describe the process to sign a Docker image - Enable Docker Content Trust - Describe MTLS and identity roles |
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NEW QUESTION # 118
Is this a way to configure the Docker engine to use a registry without a trusted TLS certificate?
Solution. Set INSECURE_REGISTRY in the' /etc/docker/default' configuration file.
Answer: B
Explanation:
Explanation
Setting INSECURE_REGISTRY in the /etc/docker/default configuration file is a way to configure the Docker engine to use a registry without a trusted TLS certificate. The INSECURE_REGISTRY option allows you to specify one or more registries that do not have valid TLS certificates or use HTTP instead of HTTPS. This option bypasses the TLS verification for these registries and allows Docker to pull and push images from them without errors. However, this option is not recommended for production use as it exposes your registry communication to potential security risks. References: https://docs.docker.com/registry/insecure/,
https://docs.docker.com/engine/reference/commandline/dockerd/#insecure-registries
NEW QUESTION # 119
Will this action upgrade Docker Engine CE to Docker Engine EE?
Solution: Delete '/var/lib/docker' directory.
Answer: A
Explanation:
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. Reference:
Upgrading Docker CE to EE for the Impatient - Part I
Install Docker Engine
Moving from docker ce to docker-EE - Stack Overflow
NEW QUESTION # 120
The Kubernetes yaml shown below describes a networkPolicy.
Will the networkPolicy BLOCK this trafftc?
Solution. a request issued from a pod bearing the tier: backend label, to a pod bearing the tier: frontend label
Answer: B
Explanation:
The networkPolicy will block the traffic from a pod bearing the tier: backend label, to a pod bearing the tier:
frontend label. The networkPolicy specifies that only pods with the tier: frontend label can access the pods with the app: guestbook-api and tier: backend labels on port 801. Any other traffic to the backend pods will be denied by default2. Therefore, a request issued from a pod bearing the tier: backend label, to a pod bearing the tier: frontend label will be blocked by the networkPolicy. References: Connect a Frontend to a Backend Using Services), Network Policies)
NEW QUESTION # 121
Will this command list all nodes in a swarm cluster from the command line?
Solution. 'docker inspect nodes
Answer: A
Explanation:
Explanation
This command does not list all nodes in a swarm cluster from the command line. The docker inspect command shows low-level information about one or more objects, such as containers, images, networks, etc. It does not show information about nodes or services. To list all nodes in a swarm cluster from the command line, you need to use docker node ls command. This command shows information about all the nodes that are part of the swarm, such as their ID, hostname, status, availability, etc. References:
https://docs.docker.com/engine/reference/commandline/inspect/,
https://docs.docker.com/engine/reference/commandline/node_ls/
NEW QUESTION # 122
Your organization has a centralized logging solution, such as Splunk.
Will this configure a Docker container to export container logs to the logging solution?
Solution: Set the log-driver and log-oPt keys to values for the logging solution (Splunk) In the daemon.json file.
Answer: B
Explanation:
Explanation
Setting the log-driver and log-opt keys to values for the logging solution (Splunk) in the daemon.json file does configure a Docker container to export container logs to the logging solution. The daemon.json file is a configuration file for the Docker daemon that allows you to specify various options for the daemon, such as logging drivers, logging options, storage drivers, etc. The log-driver option sets the default logging driver for all containers, unless overridden by the --log-driver option when creating or running a container. The log-opt option sets the default options for the logging driver, such as the Splunk URL, token, source, etc. References:
https://docs.docker.com/config/containers/logging/configure/,
https://docs.docker.com/config/containers/logging/splunk/
NEW QUESTION # 123
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