containers and microservices for realists · pdf file• rise of microservices, ......
TRANSCRIPT
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Containers & Microservices For Realists
Karthik Gaekwad @iteration1
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• Principal Member of Technical Staff • Oracle Container Cloud Team
• Previous:
• 10 years building cloud products
• Enterprise/Startup experience
Karthik Gaekwad @iteration1
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• Community Involvement (Austin):
• Devopsdays Core Organizer • Container Days Core Organizer • Cloud Austin
• Docker Austin meetup • The most popular docker helloworld image:
dockerhub.com/karthequian/helloworld
Karthik Gaekwad @iteration1
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Audience Survey
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Overview• The Evolution of DevOps
• Rise of Microservices, Containers & Serverless applications
• What are they?
• Why should you care?
• What are they used for?
• What’s Oracle doing in this space?
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Evolution of Devops• Devops at least officially 8 years old
• Velocity 2009:
• 10 Deploys a day at flickr by John Allspaw, Paul Hammond
• Agile Infrastructure openspace: Andrew Shaefer & Patrick Debois
• 2009: 1st Devopsdays conference, Ghent
• Today: ~150 official devopsdays conference
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Evolution of Devops
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CULTURE
MEASUREMENT
AUTOMATION
SHARING
Evolution of Devops
John Willis
Damon Edwards
By:
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Evolution of Devops
“System administrators participating in an agile development process alongside developers and using many of the same agile techniques for their systems work.”
The Agile Admin Blog
Well Defined:
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Evolution of Devops• Training classes available:
• Devops Fundamental Course
• You can even get certified!
• AWS Certified Devops Engineer
• RedHat Certified Devops Architect
• Devops Foundations by the Devops institute
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Containers & Microservices
…The next phase of Devops
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Containers & Microservices
• Containers and Microservices fit the devops paradigm!
• Microservices allows developers to build applications in modular way
• Allows for containerization • Containerization allows for collaboration
between dev and ops • Common language spoken between 2
teams in an org
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Microservices
“Independent processes communicating with each other with well defined API’s to form
larger more complex applications”
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Microservices
• Do one thing, and do it well (fine grained)
• Independently built- common language to communicate
• Independently deployable • Fault tolerant and reliable
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12 Factor App•Use declarative formats for setup automation;
minimize time and cost for new developers joining the project
•Clean contract with the underlying OS, offering maximum portability between execution environments;
•Suitable for deployment on modern cloud platforms •Minimize divergence between development and
production- enabling continuous deployment •Scale up without significant changes to tooling,
architecture, or development practices.
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Relationship with containers• Microservices and containers are a
great fit. • Single service on a container:
• Isolates service and makes it easy to manage and debug.
• Best practice for new architectures with containers.
• Consider building your architecture in this manner.
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Containerization
• Strong collaboration between dev and ops.
• Initially championed by developers, and now well liked by operations as well.
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Containerization
• Strong collaboration between dev and ops.
• Initially championed by developers, and now well liked by operations as well.
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Fundamentals• Portability
• Standardized Environments
• Scaling
• Pipeline building
• Dependency Management
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Portability•Idea of writing once and running anywhere.•As long as your application is Dockerized,
you can run it anywhere that has the Docker Engine installed.
•Easy to change from 1 host to another.•Flexibility to change underlying
infrastructure/operating systems etc.•Change from 1 cloud provider to another.
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Standardization• Coding environments can be made consistent
from development ->staging->QA->production.• Per environment configurations are fed in the
same way to each container which reduces configuration issues.
• Time spent debugging environmental issues is reduced drastically.
• Developers understand the production environment better, which leads to better code quality.
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Scaling
•Containers take seconds to deploy.•Scale up and down your infrastructure
is a lot faster than traditional configuration management tools.
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Continuous Delivery•Docker API’s and Docker Hub make it
easy to build a deployment pipeline.•After successful builds, a CI system
can build and push a Docker image to the Hub/private Docker repo.
•Deploy new containers to desired environment on a periodic basis/trigger webhooks to deploy.
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Dependency Management• Dependency hell happens when:
• 2 running Java or Ruby applications that depend on different versions of the same library…..
• How Docker can help:
• Isolate each application (along with it’s dependencies) so that they can be loaded in their own container.
• 1 container for 1 application or service (micro service architecture)
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Real World Examples
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Standardization• Take existing (or new) applications, containerize them, run them the
same way on dev/stage/production.
• Examples on Docker.com: Orbitz, Uber
• Typical scenarios:
• Infrastructure/Applications run in containers.
• Every code push builds a new container for the application.
• All environments uses the same command to run the application:
• sudo docker run -d -p 7777:7777 -e SE_DB=‘db_val’ karthequian/helloworld
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CI/CD Pipeline• Most common usecase of how people use Docker today.
• Examples on Docker.com: Business Insider, Spotify, Yelp
• Typical Trend:
• Code is commit to github; triggers a build with CI system.
• Successful build results in a built container that is deployed to a private registry.
• Successful push to registry triggers a webhook (swarm/kubernetes).
• new container is redeployed on production.
• <10 minute turnaround from commit->running in production.
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Multi tenancy applications
•Single Tenant application-> Multi tenant application by launching multiple instances of the same application in different containers.
•http://flux7.com/docker/
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Other Usecases•Running a PaaS
•Running entire datacenters using Docker.
•EngineYard/Yandex/Baidu are great examples of this.
•Hosting Legacy Applications
•Containerizing hard to run applications is becoming a frequent usecase.
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Docker Trends• 2 great surveys:
• Datadog docker adoption: https://www.datadoghq.com/docker-adoption/
• devops.com & ClusterHQ survey: https://clusterhq.com/assets/pdfs/state-of-container-usage-june-2016.pdf
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Source: devops.com and clusterHQ survey 2016
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2016: 10.8% of all Datadog customers use Docker (up from 8.2% in 2015)
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10% of all Datadog hosts have Docker running
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Orchestration
Source: devops.com and clusterHQ survey 2016
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Serverless Applications
• What is it?
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Serverless Applications
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Serverless Applications• Serverless was first used to describe applications that
significantly or fully depend on 3rd party applications / services (‘in the cloud’) to manage server-side logic and state. These are typically ‘rich client’ applications (think single page web apps, or mobile apps) that use the vast ecosystem of cloud accessible databases (like Parse, Firebase), authentication services (Auth0, AWS Cognito), etc. These types of services have been previously described as ‘(Mobile) Backend as a Service’, and I’ll be using ‘BaaS’ as a shorthand in the rest of this article.
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Serverless Applications• Serverless can also mean applications where some
amount of server-side logic is still written by the application developer but unlike traditional architectures is run in stateless compute containers that are event-triggered, ephemeral (may only last for one invocation), and fully managed by a 3rd party. (Thanks to ThoughtWorks for their definition in their most recent Tech Radar.) One way to think of this is ‘Functions as a service / FaaS’ . AWS Lambda is one of the most popular implementations of FaaS at present, but there are others. I’ll be using ‘FaaS’ as a shorthand for this meaning of Serverless throughout the rest of this article.
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Traditional Architectures
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Serverless Architecture
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Difference from PaaS?
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• Way to code microservices might not change.
• Still a 12 factor app mindset
• You have to think of scaling in PaaS:
• “How many dynos do I need in Heroku to run this app?”
• “How long does it take to scale from 2->4 servers?”
• Auto scaling on PaaS is great, but this is on a request basis
• Forces developers to write cleaner, more efficient code
Difference from PaaS?
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Difference from containers?• FaaS is typically built with containers…
• Once again..Scaling is the core difference.
• FaaS is managed, transparent, fine grained.
• Need to invest time in container platforms to perform scaling actions.
• Prediction: may not be true a year from now…
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Serverless Use Cases
• Image Processing
• Data Transformation
• Log Analysis
• Authentication, Licensing
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Things we are doing at Oracle
• Container Products for Oracle Public Cloud:
• Oracle Application Container Cloud
• Great for Java/Node/PHP applications
• Oracle Container Service
• Bring your own containers
• Container Management solution
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Things we are doing at Oracle
• Container Registry
• Contains pre built Oracle images
• https://container-registry.oracle.com/
• https://github.com/oracle/docker-images
• Dockerfiles for: Database, Java, Weblogic, Coherance
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Things we are doing at Oracle
• Free $300 credits to try out all the different services:
• https://cloud.oracle.com/en_US/tryit
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Attributions• Images: https://unsplash.com and https://pixabay.com
• State of devops whitepaper: https://puppet.com/resources/infographic/2016-state-of-devops-report-infographic
• Datadog docker adoption: https://www.datadoghq.com/docker-adoption/
• devops.com & ClusterHQ survey: https://clusterhq.com/assets/pdfs/state-of-container-usage-june-2016.pdf
• Oracle Docker Images: https://github.com/oracle/docker-images
• Oracle Container Cloud Service: cloud.oracle.com/container
• Oracle Application Container Service: https://cloud.oracle.com/en_US/application-container-cloud
• Microservices: https://martinfowler.com/articles/microservices.html
• 12 factor apps: https://12factor.net/
• Serverless: https://martinfowler.com/articles/serverless.html
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Bonus Content
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