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The DCA Exam certification is an internationally-recognized certification that helps to have validation for those professionals who are knowledgeable in the Docker containerization technology. Candidates should have 6-12 months of experience and knowledge of using Docker services and docker images. It is good for these candidates:
Docker blog Docker Use Case Docker Newsrooms Docker Exam Preparation Guide Docker Docs Docker forums
There are the following steps for registering the Docker Certified Associate exam:
Reference: https://dockerlabs.collabnix.com/docker/dca.html
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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Image Creation, Management, and Registry | 20% | - Display layers of a Docker image - Apply a file to create a new image - Give examples on how to create an efficient image via a Dockerfile - Describe the use of Dockerfile - Utilize a registry to store an image - Describe how to set up and use a local registry - Describe how image layers work - Inspect images and report specific attributes using filter and format - Use CLI commands such as list, delete, prune, rmi, etc. to manage images - Identify and display the main parts of a Dockerfile - Describe options, such as add, copy, volumes, expose, entry point - Demonstrate tagging an image - Describe how an image registry works |
| Topic 2: Networking | 15% | - Describe the different types and use cases for the built-in network drivers - Configure Docker to use external DNS - Create a Docker bridge network for a developer to use for their containers - Troubleshoot container and engine logs to understand a connectivity issue between containers - Publish a port so that an application is accessible externally - Describe the differences between "host" and "ingress" port publishing mode - Identify which IP and port a container is externally accessible on - Describe how to install a remote driver to a specific infrastructure provider - Understand the Container Network Model and how it interfaces with the Docker engine and network and IPAM drivers |
| Topic 3: Installation and Configuration | 15% | - Describe the interaction between Docker and Linux - Describe namespaces, cgroups, and configuration of certificates - Create and manager user and teams - Use the install command to install DTR (Docker Trusted Registry) - Outline the sizing requirements prior to installation - Configure logging drivers (splunk, journald, etc.) - Setup swarm, configure managers, add nodes, and setup the backup schedule - Describe the use of UCP (Universal Control Plane) - Complete setup of repo, select a storage driver, and complete installation of Docker engine on multiple platforms - Demonstrate the ability to upgrade the Docker engine - Interpret errors to troubleshoot installation issues without assistance |
| Topic 4: Security | 15% | - Describe the process to sign a Docker image - Enable Docker Content Trust - Describe the security architecture and responsibilities of the Docker EE platform - Describe identity roles - Describe MTLS - Describe the difference between UCP and DTR - Describe MTLS and identity roles - Describe swarm default security - Compare the UCP workers and managers - Describe UCP and DTR integration with LDAP/AD - Describe default engine security - Configure RBAC with UCP |
| Topic 5: Storage and Volumes | 10% | - Describe the use of tmpfs for ephemeral storage - Describe how to use a volume plugin (local vs. NFS) - 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 |
| Topic 6: Orchestration | 25% | - Add networks, publish ports - Extend the instructions to run individual containers into running services under swarm - Identify the steps needed to troubleshoot a service not deploying - Describe and demonstrate how to use replication mode - Mount volumes - Describe how a Dockerized application communicates with legacy systems - Manipulate a running stack of services - Describe the difference between global and replicated services - State the differences between running a container vs running a service - Describe how to deploy containerized workloads as Kubernetes pods and deployments - Demonstrate steps to lock a swarm cluster - Increase number of replicas - Interpret the output of "docker inspect" commands - Describe how to provide configuration to Kubernetes pods using configMaps and secrets - Complete the setup of a swarm mode cluster - Convert an application deployment into a stack file using a YAML compose file with "docker stack deploy" |
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