Introduction to Docker - 2017
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This document provides an introduction to Docker and discusses how it helps address challenges in the modern IT landscape. Some key points: - Applications are increasingly being broken up into microservices and deployed across multiple servers and environments, making portability and scalability important. - Docker containers help address these issues by allowing applications to run reliably across different infrastructures through package dependencies and resources together. This improves portability. - Docker provides a platform for building, shipping and running applications. It helps bridge the needs of developers who want fast innovation and operations teams who need security and control.
Introduction to Docker - 2017
- 2. The IT Landscape is Changing Docker Survey: State of App development : Q1 - 2016 Apps DevOpsCloud
- 3. 80% Migrate workloads to cloud Portability across environments Want to avoid cloud vendor lock-in Movement in the cloud State of App development Survey: Q1 - 2016
- 4. Applications are transforming Loosely Coupled Services Many Small Servers or devices ~2000 Today Monolithic Big Servers Slow changing Rapidly updated
- 5. Application Modernization Application Code Developer Issues: • Minor code changes require full re-compile and re-test • Application becomes single point of failure • Application is difficult to scale Microservices: Break application into separate operations 12-Factor Apps: Make the app independently scalable, stateless, highly available by design
- 6. Continuous Integration and Delivery Developer Version control 1. Development 2. Test 3. Stage / Production QA / QE Sysadmin
- 7. Tug of War Between Developers and Ops Developers IT Operations • Freedom to create and deploy apps fast • Define and package application needs • Quickly and flexibly respond to changing needs • Standardize, secure, and manage
- 8. Bare Metal Linux On Premises Traditional Virtual Windows Cloud Microservices Organizations Must Deal with Diverse Technology
- 9. Developers IT Operations • Freedom to create and deploy apps fast • Define and package application needs • Quickly and flexibly respond to changing needs • Standardize, secure, and manage …and Diverse Organizations
- 10. The Myth of Bi-Modal IT MICROSERVICES TRADITIONAL APPS Cloud or New Infrastructure You are either here.. Old Infrastructure …or here
- 11. Enabling a Journey MICROSERVICES AGILE TRADITIONAL APPS TRADITIONAL APPS Cloud or New Infrastructure Old Infrastructure …that is past AND future proof
- 13. History of Docker 2004 Solaris Containers / Zones technology introduced 2008 Linux containers (LXC 1.0) introduced 2013 Solomon Hykes starts Docker as an internal project within dotCloud Mar 2013 Docker released to open source Feb 2016 Docker introduces first commercial product – now called Docker Enterprise Edition Today Open source community includes: - 3,300+ contributors - 43,000+ stars - 12,000+ forks
- 14. Incredible adoption in just 4 years
- 15. Community Edition Enterprise Edition Open source framework for assembling core components that make a container platform Free, community-supported product for delivering a container solution Subscription-based, commercially supported products for delivering a secure software supply chain Intended for: Production deployments + Enterprise customers Intended for: Software dev & test Intended for: Open source contributors + ecosystem developers The Docker Family Tree
- 16. A History Lesson One application on one physical server In the Dark Ages
- 17. Historical limitations of application deployment • Slow deployment times • Huge costs • Wasted resources • Difficult to scale • Difficult to migrate • Vendor lock in 17
- 18. A History Lesson • One physical server can contain multiple applications • Each application runs in a virtual machine (VM) Hypervisor-based Virtualization
- 19. Benefits of VMs • Better resource pooling – One physical machine divided into multiple virtual machines • Easier to scale • VMs in the cloud – Rapid elasticity – Pay as you go model
- 20. Limitations of VMs • Each VM stills requires – CPU allocation – Storage – RAM – An entire guest operating system • The more VMs you run, the more resources you need • Guest OS means wasted resources • Application portability not guaranteed
- 21. • Standardized packaging for software and dependencies • Isolate apps from each other • Share the same OS kernel • Works with all major Linux and Windows Server What is a container?
- 22. Comparing Containers and VMs Containers are an app level construct VMs are an infrastructure level construct to turn one machine into many servers
- 23. Containers and VMs together Containers and VMs together provide a tremendous amount of flexibility for IT to optimally deploy and manage apps. DEV PROD
- 24. Key Benefits of Docker Containers Speed • No OS to boot = applications online in seconds Portability • Less dependencies between process layers = ability to move between infrastructure Efficiency • Less OS overhead • Improved VM density
- 26. Docker Basics Image The basis of a Docker container. The content at rest. Container The image when it is ‘running.’ The standard unit for app service Engine The software that executes commands for containers. Networking and volumes are part of Engine. Can be clustered together. Registry Stores, distributes and manages Docker images Control Plane Management plane for container and cluster orchestration
- 27. Security Distributed State Network Container Runtime Volumes Orchestration Docker Engine Integrated Security Foundation: Docker Engine
- 29. Building a Software Supply Chain Image Registry Traditional Microservices DEVELOPERS IT OPERATIONS Control Plane
- 30. Containers as a Service Developers IT Operations BUILD Development Environments SHIP Secure Content & Collaboration RUN Deploy, Manage, Scale Registry Control plane Multi-container appsEngines running on servers in cloud or datacenter Images stored in repos Clients pull and push images
- 31. Container App Lifecycle Workflow Private Image Registry Image Scanning and Monitoring Secure Access and User Management Content Trust and Verification Application and Cluster Management Policy Management Enterprise Edition Security Distributed State Network Container Runtime Volumes Orchestration Docker Engine Building a Secure Supply Chain Usable Security Trusted Delivery Portable
- 33. Docker Aligns to Multiple IT Initiatives 80% Looking at Docker for Cloud Strategy Docker Survey: State of App development : Q1 - 2016 3 out 4 Top initiatives are app modernization 44% Looking to adopt DevOps with Docker Apps DevOpsCloud State of App development Survey: Q1 2016
- 34. Docker Is in the Enterprise Service Provider Tech Public Sector Insurance Healthcare & Science Financial Services
- 35. Docker delivers agility, security and cost savings Hardened containers deliver new levels of security to monoliths on the transition to microservices Transform monoliths to secure and agile DevOps environments Reduce maintenance costs by 10X for legacy, commercial and new apps
- 36. Docker delivers agility, resiliency, portability security and cost savings for all applications 13XMore software releases 62%Report reduction in MTTR 10XCost reduction in maintaining existing applications Eliminate “works on my machine” issues ~47%Reduction in VMs, OS licensing and Server costs 65%Reduction in developer onboarding time Commercial Off The Shelf Apps Homegrown Traditional Apps Microservices Apps
- 37. One platform and one journey for all applications 1 Traditional apps in containers Gain portability, efficiency and security 2 3 Transform to Microservices Look for shared services to transform Accelerate New Applications Greenfield innovation
- 38. Multiple Stacks, Multiple Stages = Complexity
- 39. Solving the deployment matrix
- 40. Docker Enterprise Edition (EE) is the CaaS enabled platform for developers and IT • Integrated orchestration, security and management • Predictable quarterly releases with one year of support and maintenance • Security patches and hotfixes backported to all supported versions • Enterprise class support (9am-6pm or 24x7x365) • Certified Infrastructure, Containers and Plugins
- 41. Certified technology extend the platform with assurances and support