Docker and Kubernetes continues to grow & large enterprises are starting to build container strategies for both development and operations. Docker and Kubernetes are a natural fit for furthering DevOps automation. Docker is lightweight, portable and hardware-agnostic. Docker’s packaging enables a developer to write an application in any language and then easily move it. Kubernetes is purpose-built with a simplicity of design that has made it the container orchestration tool of choice.
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DOCKER & KUBERNETES COURSE CONTENT :
Docker Certified Associate (DCA) + Certified Kubernetes Administrator (CKA)
Docker Certified Associate (DCA) :
This examination is based upon the most critical job activities a Docker Certified Associate performs. The skills and knowledge certified by this examination represent a level of expertise where a certified Docker Associate can:
• Run containerized applications from pre-existing images stored in a centralized registry
• Deploy images across the cluster
• Install, maintain, and operate the Docker platform
• Triage issue reports from stakeholders and resolve
• Standup new Docker environments and perform general maintenance and configuration
• Migrate traditional applications to containers
• Configure and troubleshoot Docker engine
The knowledge and skills required at this level should include all of the following objective components :
• 6-months experience with Docker
• Exposure to Docker Enterprise Edition
• Experience with container security
• Experience with at least 1 cloud provider
• Understanding of Docker Best Practices
• Experience with configuration management tools
• Experience with Linux and/or Windows Server
These training courses or equivalency will assist in exam preparation :
• Docker Fundamentals
• Docker for Enterprise Developers
• Docker Security Course
The skills and knowledge measured by this examination are derived from an understanding of the jobs of current Docker users. A team of highly qualified Docker experts defined the test content and wrote the test items.
Note : This examination blueprint includes weighting, test objectives, and example content. Example topics and concepts are included to clarify the test objectives; they should not be construed as a comprehensive listing of all the content of this examination.
The following table lists the domains measured by this examination and the extent to which they are represented.
|Name of Domain||% of Exam|
|Image Creation, Management, and Registry||20%|
|Installation and Configuration||15%|
|Storage and Volumes||10%|
The examinee selects, from four (4) or more response options, the option(s) that best completes the statement or answers the question. Distracters or wrong answers are response options that examinees with incomplete knowledge or skill would likely choose, but they are generally plausible responses fitting into the content area defined by the test objective.
Test item formats used in this examination are as follows :
● Multiple-choice : The examinee selects one option that best answers the question or completes a statement. The option can be embedded in a graphic where the examinee “points and clicks” on a selection choice to complete the test item.
● Multiple-response : The examinee selects more than one option that best answers the question or completes a statement.
● Sample Directions : Read the statement or question, and, from the response options, select only the option(s) that represent the most correct or best answer(s) given the information.
Domain 1 : Orchestration (25% of exam)
Content may include the following :
● Complete the setup of a swarm mode cluster, with managers and worker nodes
● State the differences between running a container vs running a service
● Demonstrate steps to lock a swarm cluster
● Extend the instructions to run individual containers into running services under swarm
● Interpret the output of “docker inspect” commands
● Convert an application deployment into a stack file using a YAML compose file with
“docker stack deploy”
● Manipulate a running stack of services
● Increase # of replicas
● Add networks, publish ports
● Mount volumes
● Illustrate running a replicated vs global service
● Identify the steps needed to troubleshoot a service not deploying
● Apply node labels to demonstrate placement of tasks
● Sketch how a Dockerized application communicates with legacy systems
● Paraphrase the importance of quorum in a swarm cluster
● Demonstrate the usage of templates with “docker service create”
Domain 2 : Image Creation, Management, and Registry (20% of exam)
Content may include the following:
● Describe Docker file options [add, copy, volumes, expose, entry point, etc.)
● Show the main parts of a Docker file
● Give examples on how to create an efficient image via a Docker file
● Use CLI commands such as list, delete, prune, rmi, etc. to manage images
● Inspect images and report specific attributes using filter and format
● Demonstrate tagging an image
● Utilize a registry to store an image
● Display layers of a Docker image
● Apply a file to create a Docker image
● Modify an image to a single layer
● Describe how image layers work
● Deploy a registry (not architect)
● Configure a registry
● Log into a registry
● Utilize search in a registry
● Tag an image
● Push an image to a registry
● Sign an image in a registry
● Pull an image from a registry
● Describe how image deletion works
● Delete an image from a registry
Domain 3 : Installation and Configuration (15% of exam)
Content may include the following:
● 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)
● Setup swarm, configure managers, add nodes, and setup backup schedule
● Create and manager user and teams
● Interpret errors to troubleshoot installation issues without assistance
● Outline the sizing requirements prior to installation
● Understand namespaces, cgroups, and configuration of certificates
● Use certificate-based client-server authentication to ensure a Docker daemon has the
rights to access images on a registry
● Consistently repeat steps to deploy Docker engine, UCP, and DTR on AWS and on
premises in an HA config
● Complete configuration of backups for UCP and DTR
● Configure the Docker daemon to start on boot
Domain 4 : Networking (15% of exam)
Content may include the following:
● Create a Docker bridge network for a developer to use for their containers
● Troubleshoot container and engine logs to understand a connectivity issue between
● Publish a port so that an application is accessible externally
● Identify which IP and port a container is externally accessible on
● Describe the different types and use cases for the built-in network drivers
● Understand the Container Network Model and how it interfaces with the Docker engine
and network and IPAM drivers
● Configure Docker to use external DNS
● Use Docker to load balance HTTP/HTTPs traffic to an application (Configure L7 load
balancing with Docker EE)
● Understand and describe the types of traffic that flow between the Docker engine,
registry, and UCP controllers
● Deploy a service on a Docker overlay network
● Describe the difference between “host” and “ingress” port publishing mode
Domain 5 : Security (15% of exam)
Content may include the following:
● Describe the process of signing an image
● Demonstrate that an image passes a security scan
● Enable Docker Content Trust
● Configure RBAC in UCP
● Integrate UCP with LDAP/AD
● Demonstrate creation of UCP client bundles
● Describe default engine security
● Describe swarm default security
● Describe MTLS
● Identity roles
● Describe the difference between UCP workers and managers
● Describe process to use external certificates with UCP and DTR
Domain 6 : Storage and Volumes (10% of exam)
Content may include the following :
● State which graph driver should be used on which OS
● Demonstrate how to configure devicemapper
● Compare object storage to block storage, and explain which one is preferable when available
● Summarize how an application is composed of layers and where those layers reside on
● Describe how volumes are used with Docker for persistent storage
● Identify the steps you would take to clean up unused images on a filesystem, also on
● Demonstrate how storage can be used across cluster nodes
Certified Kubernetes Administrator (CKA) Exam Curriculum 1.13.0
This document provides the curriculum outline of the Knowledge, Skills and Abilities
that a Certified Kubernetes Administrator(CKA) can be expected to demonstrate.
• Use label selectors to schedule Pods.
• Understand the role of Daemon Sets.
• Understand how resource limits can affect Pod scheduling.
• Understand how to run multiple schedulers and how to configure Pods to use them.
• Manually schedule a pod without a scheduler.
• Display scheduler events.
• Know how to configure the Kubernetes scheduler.
• Understand how to monitor all cluster components.
• Understand how to monitor applications.
• Manage cluster component logs.
• Manage application logs.
Application Lifecycle Management
• Understand Deployment sand how to perform rolling updates and rollbacks.
• Know various ways to configure applications.
• Know how to scale applications.
• Understand the primitives necessary to create a self-healing application.
• Understand Kubernetes cluster upgrade process.
• Facilitate operating system upgrades.
• Implement backup and restore methodologies.
• Know how to configure authentication and authorization.
• Understand Kubernetes security primitives.
• Know to configure network policies.
• Create and manage TLS certificates for cluster components.
• Work with images securely.
• Define security contexts.
• Secure persistent keyvalue store.
• Understand persistent volumes and know how to create them.
• Understand access modes for volumes.
• Understand persistent volume claims primitive.
• Understand Kubernetes storage objects.
• Know how to configure applications with persistent storage.
• Trouble shoot application failure.
• Trouble shoot control plane failure.
• Trouble shoot worker node failure.
• Trouble shoot networking.
• Understand the Kubernetes API primitives.
• Understand the Kubernetes cluster architecture.
• Understand Services and other network primitives.
• Understand the networking configuration on the cluster nodes.
• Understand Pod networking concepts.
• Understand Service networking.
• Deploy and configure network loadbalancer.
• Know how to use Ingress rules.
• Know how to configure and use the cluster DNS.
• Understand CNI.
Installation, Configuration & Validation
• Design a Kubernetes cluster.
• Install Kubernetes masters and nodes.
•Configure secure cluster communications.
• Configure a Highly-Available Kubernetes cluster.
• Know where to get the Kubernetes release binaries.
• Provision underlying infrastructure to deploy a Kubernetes cluster.
• Choose a network solution.
• Choose your Kubernetes infrastructure configuration.
• Run end-to-end tests on your cluster.
• Analyse end-to-end tests results.
• Run Node end-to-end tests.
Red Hat Certificate of Expertise in PaaS exam (EX280)
Candidates for the Red Hat Certificate of Expertise in Platform-as-a-Service (PaaS) should be able to perform these tasks:
Install and configure OpenShift Enterprise by Red Hat master and node hosts.
Configure OpenShift Enterprise so that applications can be securely accessed by external clients.
Configure OpenShift Enterprise node properties.
Create a simple OpenShift Enterprise project.
Configure resource limits for projects.
Configure persistent storage for registry use.
Deploy an application from a Git repository.
Edit and import application templates.
Assemble an application from existing components.
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This course prepares you for these credentials
Red Hat Certified Architect — RHCA®
RHCA certification represents a depth of knowledge in Red Hat Enterprise Linux and breadth of knowledge across other Red Hat technologies.
Certificates of Expertise
Certificates of Expertise are incremental credentials attached to an RHCE certification that demonstrate skills and knowledge in specialised areas.
Red Hat Certified Architect (RHCA)
A Red Hat® Certified Architect (RHCA) is a Red Hat Certified Engineer (RHCE®) or Red Hat Certified JBoss Developer who attained Red Hat’s highest level of certification by passing and keeping current five additional hands-on exams on Red Hat technologies from the respective lists below. If you pass more than five, then you achieve a higher level of RHCA. For example, if you passed six exams beyond RHCE or RHCJD you would be an RHCA Level II. This status would be reflected on the verification page.
In order to retain RHCA status, you must keep at least five credentials beyond either RHCE or RHCJD current from the respective lists on the SKILLS tab below. These need not be the same credentials you used when you first earned RHCA.
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RHCA: Application development
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