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Course Outline
Day 1 – Containers and Image Management
Introduction to Container Platforms
- Traditional application deployment compared with container-based deployment
- Containers versus virtual machines
- Container runtimes and container engines
- The role of Docker, Kubernetes, and OpenShift
- Common container platform architectures
- Development, testing, and production workflows
Working with Containers
- Running and managing containers
- Container lifecycle management
- Starting, stopping, and removing containers
- Executing commands inside containers
- Utilizing environment variables
- Port mapping techniques
- Accessing container logs
- Inspecting resource usage and processes
Building Container Images
- Understanding image structure and layers
- Creating Dockerfiles and Containerfiles
- Selecting appropriate base images
- Incorporating application dependencies
- Configuring entry points and commands
- Leveraging image caching
- Optimizing to reduce image size
- Ensuring reproducible image builds
Container Registries
- Differentiating between public and private registries
- Tagging and versioning images
- Pushing and pulling images
- Implementing image authentication
- Managing image retention and cleanup
- Considering basic image security aspects
Container Networking and Storage
- Fundamental container network concepts
- Bridge networking configurations
- Exposing ports
- Facilitating container-to-container communication
- Using bind mounts and volumes
- Preserving persistent container data
- Key backup considerations
Hands-on Exercises
- Running and inspecting containers
- Constructing an application image
- Configuring ports and environment variables
- Publishing an image to a registry
- Storing persistent data outside of a container
Day 2 – Kubernetes Architecture and Workloads
Kubernetes Fundamentals
- The purpose of container orchestration
- Overview of Kubernetes architecture
- Control plane components
- Worker nodes
- The API server
- The Scheduler
- Controllers
- Distinguishing cluster state from desired state
- Interacting with the cluster using kubectl
Kubernetes Resources
- Pods
- ReplicaSets
- Deployments
- Namespaces
- Labels and annotations
- Selectors
- Declarative resource definitions
- YAML manifests
Deploying Applications
- Creating and managing Deployments
- Scaling workloads up or down
- Updating container images
- Executing rolling updates
- Performing rollbacks
- Reviewing deployment history
- Restarting workloads
- Managing application replicas
Application Configuration
- Utilizing ConfigMaps
- Managing Secrets
- Setting environment variables
- Handling configuration files
- Separating application code from configuration
- Managing environment-specific settings
Resource Management
- Defining CPU and memory requests
- Setting CPU and memory limits
- Implementing resource quotas
- Configuring limit ranges
- Understanding scheduling implications
- Diagnosing resource-related failures
Hands-on Exercises
- Deploying a containerized application
- Creating and updating Kubernetes manifests
- Scaling an application
- Performing a rolling update and rollback
- Configuring the application using ConfigMaps and Secrets
- Applying resource requests and limits
Day 3 – Kubernetes Networking, Storage, and Security
Kubernetes Networking
- The cluster networking model
- Pod-to-pod communication mechanisms
- Service discovery processes
- DNS functionality within the cluster
- ClusterIP services
- NodePort services
- LoadBalancer services
- Ingress concepts
- Application exposure patterns
Network Policies
- Controlling traffic between workloads
- Defining ingress and egress rules
- Namespace-based traffic control
- Testing network connectivity
- Troubleshooting service communication issues
Persistent Storage
- Distinguishing ephemeral from persistent storage
- Working with Volumes
- PersistentVolumes (PVs)
- PersistentVolumeClaims (PVCs)
- StorageClasses
- Dynamic provisioning
- Access modes
- Reclaim policies
- Storage solutions for stateful applications
Kubernetes Access Control
- Concepts of authentication and authorization
- Role-Based Access Control (RBAC)
- Roles and ClusterRoles
- RoleBindings and ClusterRoleBindings
- Service accounts
- Implementing least-privilege access
- Inspecting effective permissions
Workload Security
- Configuring security contexts
- Running containers as non-root users
- Managing Linux capabilities
- Utilizing read-only filesystems
- Secure handling of secrets
- Ensuring image provenance
- Identifying common configuration risks
Hands-on Exercises
- Exposing an application using Kubernetes services
- Configuring ingress rules
- Restricting traffic via a network policy
- Provisioning persistent storage
- Configuring RBAC permissions
- Running a workload with an appropriate security context
Day 4 – Working with OpenShift Environments
Introduction to OpenShift
- OpenShift as a Kubernetes-based application platform
- Kubernetes resources within an OpenShift environment
- OpenShift cluster architecture
- Differentiating projects and namespaces
- Platform users and service accounts
- Navigating the web console
- Utilizing the OpenShift CLI
Managing Projects and Access
- Creating and managing projects
- Assigning user permissions
- Understanding project-level roles
- Gaining administrative access
- Implementing resource quotas
- Configuring limit ranges
- Managing service accounts
- Reviewing project resources
Deploying Applications
- Deploying container images
- Creating application workloads
- Managing deployments
- Scaling applications
- Updating application versions
- Performing rollbacks
- Managing application configuration
- Working with secrets
Application Exposure
- Services in OpenShift
- Routes
- TLS concepts
- Internal and external application access methods
- Managing hostnames and certificates
- Diagnosing route and service issues
Storage in OpenShift
- Persistent Volume Claims (PVCs)
- StorageClasses
- Attaching storage to workloads
- Managing stateful workloads
- Configuring storage access permissions
- Troubleshooting volume mounting issues
Scheduling and Node Management
- Using labels and selectors
- Node selectors
- Taints and tolerations
- Affinity and anti-affinity concepts
- Workload placement strategies
- Cordoning and draining nodes
- Considerations for node maintenance
Hands-on Exercises
- Accessing an OpenShift environment
- Creating and configuring a project
- Deploying and exposing an application
- Configuring user and service-account access
- Attaching persistent storage
- Scaling and updating a running workload
Day 5 – Operations, Monitoring, and Troubleshooting
Platform Monitoring
- Monitoring cluster and application health
- Analyzing resource metrics
- Checking node health
- Reviewing workload status
- Evaluating capacity and resource utilization
- Identifying performance constraints
Logging and Events
- Accessing container logs
- Viewing pod logs
- Reviewing previous container logs
- Monitoring Kubernetes events
- Analyzing application and platform messages
- Filtering and interpreting operational data
Health Checks
- Configuring startup probes
- Setting up readiness probes
- Implementing liveness probes
- Designing useful health endpoints
- Diagnosing probe failures
- Preventing unnecessary application restarts
Troubleshooting Workloads
- Resolving pending pods
- Addressing image pull failures
- Debugging crash loops
- Fixing misconfigured environment variables
- Investigating failed mounts
- Dealing with insufficient resources
- Resolving permission errors
- Troubleshooting service and route connectivity problems
- Diagnosing DNS issues
- Addressing application startup failures
Operational Security
- Reviewing permissions
- Evaluating service account usage
- Safely handling credentials
- Adhering to image security practices
- Maintaining network isolation
- Auditing platform access
- Applying the principle of least privilege
Maintenance and Lifecycle Management
- Conducting routine platform checks
- Performing node maintenance
- Considering application backup strategies
- Backing up configurations
- Planning updates
- Managing changes
- Testing updates
- Planning for rollbacks
- Understanding disaster recovery concepts
Final Practical Workshop
Participants complete an end-to-end operational scenario:
- Build and tag a container image.
- Publish the image to a registry.
- Deploy the application to Kubernetes or OpenShift.
- Configure application settings and credentials.
- Expose the application.
- Attach persistent storage.
- Configure access permissions.
- Add health checks.
- Scale and update the application.
- Diagnose and resolve an introduced failure.
Course Format
- Interactive lectures and technical discussions.
- Instructor demonstrations.
- Extensive hands-on exercises.
- Scenario-based administration and troubleshooting workshops.
- Practical work in container, Kubernetes, and OpenShift environments.
Course Customization Options
- The course can be adapted to the participant's existing infrastructure, cloud provider, and container tooling.
- The balance between Docker, Kubernetes, and OpenShift topics can be adjusted according to the team's experience.
- Practical exercises can be tailored to the organization's applications, deployment processes, and operational requirements.
Trademark Notice
OpenShift is a trademark of Red Hat, Inc. This independently developed training is not affiliated with, endorsed by, or authorized by Red Hat.
Requirements
Participants should have:
- Experience using the Linux command line.
- Basic knowledge of system administration or DevOps.
- A general understanding of networking concepts.
- Familiarity with software deployment processes.
Previous experience with Docker, Kubernetes, or OpenShift is beneficial but not mandatory.
35 Hours
Testimonials (7)
Reda explanations and he simplified alot of the understanding
Eric Van Wyk
Course - Docker, Kubernetes and OpenShift 3 for Administrators
The labs were the best. Very practical and provides hands-on experience. I personally think that it is the most effective means of truly understanding the course and applying the concepts that were covered.
Hishaam Johnstone
Course - Docker, Kubernetes and OpenShift 3 for Administrators
I loved the willingness to help and explain further when uncertain
Letlotlo Miffi
Course - Docker, Kubernetes and OpenShift 3 for Administrators
Adriano studied the subject very deeply which is the style i mostly prefer ie: less about the commands more on the mechanism behind it. Discussed scenarios were well supported by the practical examples which helped a lot to understand the presented stuff.
Mariusz BANASZCZYK - Sopra Steria
Course - Docker, Kubernetes and OpenShift for Administrators
Deep knowledge of Adriano. Explanation of base concepts
Tomasz Szalankiewicz - LPP SA
Course - Docker, Kubernetes and OpenShift for Administrators
I generally liked the presenter.
Josif Kovacevic - ANZ
Course - Docker, Kubernetes and OpenShift for Administrators
Adrian clearly knows and enjoys this technology.
