DockerDay - Microservices

** Final**

Katowice, 16 December 2015

Dominik Sowa

Chief architect in ING Services Polska delivering PaaS, IaaS and SecaaS services. Responsible for technological innovation and development of infrastruscture+security services in ING group. An enthusiast of new technologies and the use of open source solutions in large corporations.

www.linkedin.com/in/dominiksowa

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Who am I?

1. Microservices architecture2. Autoscaling in applications3. Technology platforms4. Data persistency in containers

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Agenda

Microservices architecture

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In short, the microservice architectural style is an approach to developing a single application as a suite of small services, each running in its own process and communicating with lightweight mechanisms, often an HTTP resource API.

These services are built around business capabilities and independently deployable by fully automated deployment machinery.

There is a bare minimum of centralized management of these services, which may be written in different programming languages and use different data storage technologies.

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Definition by James Lewis and Martin Fowler

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Google Trends on: microservices

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Monolythic Microservices

Monolythic vs microservices applications

vs

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Monolythic Microservices

Monolythic vs microservices applications

vs

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Monolythic Microservices

Monolythic vs microservices applications

App1

Ho

stDB1 DB2

Ho

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DB1 DB2

Srv1 Srv2Srv3

Srv3

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DB2

Srv2Srv4

Srv4

Srv4

Srv5

vs

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Cloud deployment and elastic

scalability

Complex distributed systems

Fast changes, new features

Current challenges

Implementation - standardization

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Implementation - transport

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Implementation - logistics

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• "Docker is an open platform for developers and sysadmins to build, ship, and run distributed applications." - www.docker.com

• Containers for applications and its dependencies

What is ?

Infrastructure

Host Operating System

Hypervisor

GuestOS

Libs/Bins

App 1

GuestOS

Libs/Bins

App 2

GuestOS

Libs/Bins

App 3

Infrastructure

Operating System

Docker Engine

Libs/Bins

App 1

Libs/Bins

App 2

Libs/Bins

App 3

Docker host OS – where to start?

Docker ready OS:• CoreOS• Project Atomic (Fedora, CentOS, RHEL)• Snappy Ubuntu Core• RancherOS

Regular linux distros

a real container ecosystem

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Autoscaling in applications

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Ho

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Ap

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Vertical vs horizontal scaling

Ho

st

Ve

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al

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stDB1 DB2

Ho

st

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ostDB1 DB2

App1 App1 App1 App1

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Autoscaling with microservices

Ho

stDB1 DB2

Srv1 Srv2Srv3

Srv3

Ho

st

DB2

Srv2Srv4

Srv4

Srv4

Srv5

Ho

st

Srv5Srv5

Srv4

Srv5

Srv4

Ho

st

DB1 DB2

Srv1 Srv2

DB1

Srv1

Ho

st

DB2

Srv2

DB2

Srv2

Ho

st

Srv3

Srv4

Srv3

Srv5DB2

Srv2

Technology platforms

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Runtime platforms

The runtime platform supports the execution of program, when deployed with the program it becomes stateless, immutable and short lived.

Database

ObjectStorage

Message

Security

Cache

Logging

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Data platform

The data platform can provide state, caching, logging and event information from or to the runtime platform.

Data persistency in containers

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Use old platform solutions

Deploy state in container

Develop private cloud services

Consume public cloud services

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How to solve persistency in containers

GuestOS

Libs/Bins

Database

GuestOS

Libs/Bins

Message

GuestOS

Libs/Bins

Log Mgt

Local DC

DB aaS

Messsage

Log aaS

Libs/Bins

Database

Libs/Bins

Message

Libs/Bins

Log Mgt

Thanks

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